Details of the Researcher

PHOTO

Fumiyuki Adachi
Section
International Research Institute of Disaster Science
Job title
Specially Appointed Research Fellow
Degree
  • Dr. of Engineering (Tohoku University)

e-Rad No.
90323055
Researcher ID

Research History 7

  • 2022/04 - Present
    Tohoku University International Research Institute of Disaster Science Specially Appointed Research Fellow

  • 2021/04 - 2022/03
    Tohoku University Research Organization of Electrical Communication Specially Appointed Research Fellow

  • 2016/04 - 2021/03
    Tohoku University Research Organization of Electrical Communication Specially Appointed Professor for Research

  • 2000/01 - 2016/03
    東北大学 教授(工学研究科)

  • 1998/06 - 1999/12
    NTT移動通信網株式会社ワイヤレス研究所主席研究員

  • 1995/07 - 1998/05
    NTT移動通信網株式会社研究開発部主席研究員

  • 1992/04 - 1995/06
    NTT移動通信網株式会社研究開発部主幹研究員

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Education 1

  • Tohoku University Faculty of Engineering 電気工学科

    - 1973/03

Committee Memberships 15

  • IEEE Sendai LMAG Chair

    2024/01 - 2025/12

  • IEEE VTS Tokyo Chapter Chair

    2016/01 - 2018/12

  • IEEE Sendai Section Chair

    2014/01 - 2015/12

  • 電子情報通信学会 副会長

    2013/05 - 2015/05

  • 電子情報通信学会 評議員(地方)

    2011/05 - 2013/05

  • 電子情報通信学会 理事(調査)

    2009/05 - 2011/05

  • 電子情報通信学会 評議員(地方)

    2006/05 - 2008/05

  • IEEE Sendai Section Vice Chair

    2004/01 - 2005/12

  • 電子情報通信学会 評議員(地方)

    2003/05 - 2005/05

  • 電子情報通信学会 通信ソサイエティ・無線システム研究専門委員会委員長

    2002/05 - 2005/05

  • 電子情報通信学会 東北支部評議員

    2003/05 - 2004/05

  • 電子情報通信学会 東北支部評議員

    2002/05 - 2004/05

  • 2004年アンテナ伝播国際シンポジウム(ISAP’04),実行委員会 会場委員

    2004/12 -

  • 信学会通信ソサイエティ・英文特集号「多次元移動情報ネットワーク」2003年7月号編集委員会 編集委員

    2003/07 -

  • 信学会通信ソサイエティ・英文特集号「次世代移動通信におけるマルチプルアクセスと信号伝送技術小特集号」2003年1月号編集委員会 編集委員

    2003/01 -

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Professional Memberships 2

  • IEEE

  • 電子情報通信学会

Research Interests 3

  • wireless signal processing

  • wireless networking

  • Wireless communications engineering

Research Areas 1

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Communication and network engineering /

Awards 32

  1. 2020年度最優秀貢献賞

    2021/05 信学会無線システム研究会

  2. IEICE ComEX Best Letter Award 2019

    2020/05 IEICE

  3. APCC 2019 Best Paper Award

    2019/11 APCC 2019

  4. 「電波の日」総務省東北総合通信局長表彰

    2019/06 総務省東北総合通信局

  5. IEEE ComSoc RCC Technical Recognition Award

    2017/12 IEEE Outstanding contributions to the development of mobile radio systems

  6. IEEE VTS Stuart Meyer Memorial Award

    2017/09 IEEE

  7. 市政功労者表彰

    2017/07 仙台市 新技術の創出および産学官連携のための環境整備への功績

  8. ICC 2017 Best Paper Award

    2017/05 IEEE

  9. 志田林三郎賞

    2016/06 情報通信月間推進協議会

  10. IEEE TAOS Technical CommitteeBest Paper Award

    2016/05 IEEE The Transmission, Access, and Optical Systems (TAOS) Technical Committee

  11. C&C賞

    2014/11/26 NEC C&C財団 デジタル移動通信システムの開発と実用化にかかわる主導的・先導的貢献

  12. IEEE VTS Conference Chair Award

    2014/05/20 IEEE VTS for contributions and efforts with the organizing of VTC2012-Spring in Yokohama

  13. 2012年度KDDI財団優秀研究賞

    2013/03/29 KDDI財団

  14. Chinacom 011 Best Paper Award

    2011/08 Chinacom

  15. Distinguished Visiting Fellowship

    2011/01/12 Royal Academy of Engineering

  16. 地方発明表彰日本弁理士会会長奨励賞

    2010/10/14 発明協会 送電線用デジタル電力線搬送装置の発明

  17. 全国発明表彰内閣総理大臣発明賞

    2010/07/30 発明協会 W-CDMAにおけるセル探索時間短縮技術の発明

  18. 信学会論文賞

    2010/05/22 電子情報通信学会 Introduction of Frequency-Domain Signal Processing to Broadband Single-Carrier Transmissions in a Wireless Channel

  19. 第25回テレコムシステム技術賞

    2010/03/15 電気通信普及財団

  20. Ericsson Telecommunications Award

    2008/11/25 日本エリクソン

  21. IEICE Fellow

    2007/09/11 電子情報通信学会 W-CDMA移動無線通信システムの研究開発に対する貢献

  22. Research Front Award

    2004/11/02 トムソンサイエンティフィック 符号分割マルチアクセスを用いた広帯域移動無線通信技術の研究開発

  23. IEICE Achievement Award

    2003/05/28 電子情報通信学会 第3世代移動通信方式の先駆的研究とその応用への貢献

  24. IEEE Fellow Award

    2002/01 IEEE For contributions and leadership in digital cellular communication technologies

  25. 電波功績賞・総務大臣表彰

    2001/09/26 社団法人電波産業会 広帯域CDMA方式の同期技術等の研究開発

  26. 2001 APCC Paper Award

    2001/09 Asia Pacific Conference on Communications "Hybrid data transmission technique for multimedia satellite broadcasting," presented at the 7th Asia-Pacific Conference on Communications, pp. 602-605, Tokyo, Japan, Sept. 17

  27. 東北総合通信局長表彰

    2001/06/01 総務省東北通信局 「離島・湾岸地域向けの無線インターネットに関する調査研究会」の座長として電波活用方策の取りまとめに務めるなど,離島地域等の情報通信格差の是正及び先進的な情報通信システムの利用発展に多大な貢献をした.

  28. IEEE VTS Avant Garde Award

    2000/05 IEEE Contribution to mobile communications wireless technologoies

  29. 信学会論文賞

    1999/05 電子情報通信学会 "Orthogonal forward link using orthogonal multi-spreading factor codes for coherent DS-CDMA mobile radio," IEICE Trans. Commun., vol. E81-B, Apr. 1998に対する論文賞

  30. 信学会論文賞

    1997/05 電子情報通信学会 "Coherent multicode DS-CDMA mobile radio access," IEICE Trans.Commun., vol.E79-B, Sept. 1996に対する論文賞

  31. IEEE VTS Best Paper Award

    1991/05 IEEE Vehcular Technology Society Award on "Performance evaluation of various decision schemes for frequency demodulator reception of narrowband digital FM signals in land mobile radio," IEEE Trans. Veh. Tech., vol. 39, May 1990.

  32. IEEE VTS Best Paper Award

    1981/05 IEEE Vehicular Technology Society Award on "Theoretical studies of a simulcast digital radio paging system using a carrier frequency offset strategy," IEEE Trans. Vhe. Tech., vol. VT-29, Feb. 1980.

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Papers 926

  1. Rethinking Hardware Impairments in Multi-User Systems: Can FAS Make a Difference? Peer-reviewed

    Junteng Yao, Tuo Wu, Liaoshi Zhou, Ming Jin, Cunhua Pan, Maged Elkashlan, Fumiyuki Adachi, George K. Karagiannidis, Naofal Al-Dhahir, Chau Yuen

    IEEE TRANSACTIONS ON MOBILE COMPUTING 25 (4) 4965-4978 2026/04

    DOI: 10.1109/TMC.2025.3628255  

    ISSN: 1536-1233

    eISSN: 1558-0660

  2. SAR image change detection based on saliency region guidance and SIFT keypoint extraction Peer-reviewed

    Lu Wang, Bailiang Sun, Chunhui Zhao, Suleman Mazhar, Tomoaki Ohtsuki, P. Takis Mathiopoulos, Fumiyuki Adachi

    PATTERN RECOGNITION 172 2026/04

    DOI: 10.1016/j.patcog.2025.112471  

    ISSN: 0031-3203

    eISSN: 1873-5142

  3. Generative Augmented Cascade Broad Learning for Lightweight Multi-Band Spectrum Prediction Peer-reviewed

    Niancong Ji, Tiancheng Liu, Yibin Zhang, Qin Wang, Tomoaki Ohtsuki, Guan Gui, Chau Yuen, Fumiyuki Adachi

    IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING 12 382-394 2026/04

    DOI: 10.1109/TCCN.2025.3562326  

    ISSN: 2332-7731

  4. Robust HAR with CSI Tokens: Single-Direction Prompt Guidance on a Frozen LLM Invited Peer-reviewed

    Fucheng Miao, Osamu Takyu, Lin Shan, Ou Zhao, Tomoaki Ohtsuki, Guan Gui, Fumiyuki Adachi

    2026 International Conference on Computing, Networking and Communications (ICNC) 1-7 2026/03

    Publisher: IEEE

    DOI: 10.1109/icnc68183.2026.11416929  

  5. Resilient Distributed Antenna System via Dynamic Cell-Restructuring Peer-reviewed

    Sijie Xia, Suguru Kameda, Qiang Chen, Fumiyuki Adachi

    International Conference on Computing, Networking and Communications (ICNC 2026) 2026/03

  6. Multi-Satellite Federated Learning for On-Orbit Radio Frequency Fingerprint Identification Peer-reviewed

    Long Yang, Zhenhan Zhao, Lu Lv, Yuchen Zhou, Xianfu Lei, Arumugam Nallanathan, Fumiyuki Adachi

    IEEE WIRELESS COMMUNICATIONS 2026/02/13

    DOI: 10.1109/MWC.2026.3656149  

    ISSN: 1536-1284

    eISSN: 1558-0687

  7. Exploit Security for Low-Altitude Economy: A SWIPT-Driven Strategy With UAV-Mounted MF-RIS Peer-reviewed

    Sai Zhao, Longshen Wen, Dong Tang, Tuo Wu, Maged Elkashlan, Fumiyuki Adachi, Naofal Al-Dhahir, Chau Yuen

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 75 (2) 3336-3341 2026/02

    DOI: 10.1109/TVT.2025.3599863  

    ISSN: 0018-9545

    eISSN: 1939-9359

  8. Multi-Dimensional Spectrum Prediction Using Closed-Form Continuous-Time Neural Network With Graph Attention Peer-reviewed

    Ruicheng Li, Shufei Wang, Hao Huang, Chau Yuen, Xianbin Wang, Fumiyuki Adachi, Guan Gui

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 75 (1) 1580-1584 2026/01

    DOI: 10.1109/TVT.2025.3593372  

    ISSN: 0018-9545

    eISSN: 1939-9359

  9. Efficient DOA Estimation in Hybrid Analog-Digital Structures: Mitigating the Impact of Mutual Coupling Peer-reviewed

    Ye Tian, Hongyun Zhao, Tuo Wu, Wei Liu, Maged Elkashlan, Henk Wymeersch, Fumiyuki Adachi, George K. Karagiannidis, Chau Yuen

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 75 (1) 1677-1682 2026/01

    DOI: 10.1109/TVT.2025.3594548  

    ISSN: 0018-9545

    eISSN: 1939-9359

  10. Further investigation of impact of fading correlation on joint transmit-receive diversity Peer-reviewed

    Fumiyuki Adachi, Ryo Takahashi

    IEICE COMMUNICATIONS EXPRESS 14 (12) 460-463 2025/12

    DOI: 10.23919/comex.2025XBL0101  

    ISSN: 2187-0136

  11. Exploiting Large Language Models for Single-Channel Mix Source Separation in Anti-Jamming Wireless Communications Peer-reviewed

    Boya Li, Luliang Jia, Lin Zhang, Nan Qi, Wanbin Tang, Fumiyuki Adachi

    IEEE COMMUNICATIONS LETTERS 30 422-426 2025/11

    DOI: 10.1109/LCOMM.2025.3637306  

    ISSN: 1089-7798

    eISSN: 1558-2558

  12. Array-Antenna-Based Cluster-Centric Cell-Free Massive MIMO: Interference Suppression and Cost Reduction by Hybrid Beamforming Peer-reviewed

    Kazuya Ogata, Sijie Xia, Masataka Miyake, Suguru Kameda, Fumiyuki Adachi

    2025 IEEE 102nd Vehicular Technology Conference (VTC2025-Fall) 1-5 2025/10

    Publisher: IEEE

    DOI: 10.1109/vtc2025-fall65116.2025.11310650  

  13. Exploring the Impact of RIS on Cooperative NOMA URLLC Systems: A Theoretical Perspective Peer-reviewed

    Jianchao Zheng, Tuo Wu, Junteng Yao, Chau Yuen, Zhiguo Ding, Fumiyuki Adachi

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 24 (10) 8461-8475 2025/10

    DOI: 10.1109/TWC.2025.3566602  

    ISSN: 1536-1276

    eISSN: 1558-2248

  14. 2D-DOA Estimation for Polarized Massive Antenna Array: Geometric and Algorithmic Guidelines Peer-reviewed

    Fangqing Wen, Han Wang, Guan Gui, Chau Yuen, Hikmet Sari, Fumiyuki Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 74 (9) 14207-14219 2025/09

    DOI: 10.1109/TVT.2025.3563979  

    ISSN: 0018-9545

    eISSN: 1939-9359

  15. Comprehensive analysis and evaluation of single/multi-user joint transmit-receive diversity Peer-reviewed

    Fumiyuki Adachi, Ryo Takahashi

    IEICE Transactions on Communications E108 (9) 1-16 2025/09

    DOI: 10.23919/transcom.2024ebp3211  

    ISSN: 0916-8516

    eISSN: 1745-1345

  16. Unlocking FAS-RIS Security Analysis With Block-Correlation Model Peer-reviewed

    Jianchao Zheng, Xiazhi Lai, Tuo Wu, Maged Elkashlan, Daniel Benevides da Costa, Chau Yuen, Fumiyuki Adachi

    IEEE WIRELESS COMMUNICATIONS LETTERS 14 (7) 2029-2033 2025/07

    DOI: 10.1109/LWC.2025.3561763  

    ISSN: 2162-2337

    eISSN: 2162-2345

  17. Open-Set Automatic Modulation Classification Using Deep Metric Learning and Openmax Peer-reviewed

    Chen Ai, Weiqi Sun, Xixi Zhang, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi, Guan Gui

    2025 IEEE 101st Vehicular Technology Conference (VTC2025-Spring) 1-5 2025/06

    Publisher: IEEE

    DOI: 10.1109/vtc2025-spring65109.2025.11174756  

  18. Radio Map Reconstruction Based on Deep Denoising Regularization for UAV Communications Peer-reviewed

    Haitao Zhao, Qing Hao, Yunxiang He, Hao Huang, Hikmet Sari, Fumiyuki Adachi, Guan Gui

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 74 (6) 9876-9881 2025/06

    DOI: 10.1109/TVT.2025.3542768  

    ISSN: 0018-9545

    eISSN: 1939-9359

  19. FAS-RIS Communication: Model, Analysis, and Optimization Peer-reviewed

    Junteng Yao, Jianchao Zheng, Tuo Wu, Ming Jin, Chau Yuen, Kai-Kit Wong, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 74 (6) 1-6 2025/06

    DOI: 10.1109/tvt.2025.3537294  

    ISSN: 0018-9545

    eISSN: 1939-9359

  20. An Optimized Neural Network Framework for Designing Spectrally Compatible Radar Waveforms Peer-reviewed

    Shengnan Shi, Yu Wang, Guolong Cui, Yun Lin, Guan Gui, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Cognitive Communications and Networking 11 (3) 1776-1787 2025/06

    DOI: 10.1109/TCCN.2024.3488815  

    ISSN: 2332-7731

  21. Fluid Antenna-Assisted Simultaneous Wireless Information and Power Transfer Systems Peer-reviewed

    Liaoshi Zhou, Junteng Yao, Tuo Wu, Ming Jin, Chau Yuen, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 74 (5) 1-6 2025/05

    DOI: 10.1109/tvt.2025.3528949  

    ISSN: 0018-9545

    eISSN: 1939-9359

  22. A Joint Optimization Framework for Sum-Rate Maximization in Air Reconfigurable Intelligent Surface Assisted MIMO-NOMA Systems Peer-reviewed

    Haitao Zhao, Zhipeng Kong, Yunxiang He, Biyao Ding, Hao Huang, Yiyang Ni, Guan Gui, Hikmet Sari, Fumiyuki Adachi

    IEEE Internet of Things Journal 12 (8) 9372-9382 2025/04/15

    DOI: 10.1109/JIOT.2024.3465219  

    ISSN: 2327-4662

  23. SAR Images Change Detection Based on Attention Mechanism-Convolutional Wavelet Neural Network Peer-reviewed

    Jiahui E, Lu Wang, Chunhui Zhao, P. Takis Mathiopoulos, Tomoaki Ohtsuki, Fumiyuki Adachi

    IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 18 1-16 2025/04

    DOI: 10.1109/jstars.2025.3557434  

    ISSN: 1939-1404

    eISSN: 2151-1535

  24. Learnable Broad Learning for Semi-Supervised Specific Emitter Identification in the Internet of Everything Peer-reviewed

    Yibin Zhang, Yang Peng, Qin Wang, Yun Lin, Guan Gui, Dusit Niyato, Fumiyuki Adachi

    2025 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, WCNC 2025/03

    DOI: 10.1109/WCNC61545.2025.10978799  

    ISSN: 1525-3511

  25. An Ensemble Learning-Based Fault Detection Method for Vehicular Ad Hoc Networks in Intelligent Transportation Systems Peer-reviewed

    Jiaxi Liu, Haitao Zhao, Peiyi Han, Guan Gui, Tomoaki Ohtsuki, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 74 (3) 5114-5124 2025/03

    DOI: 10.1109/tvt.2024.3502698  

    ISSN: 0018-9545

    eISSN: 1939-9359

  26. A Rapid SAR Image Simulation Method for Ship Wakes Coupled With Sea Waves Using Fluid Velocity Potential Peer-reviewed

    Chunhui Zhao, Kaiyu Li, Lu Wang, Tomoaki Ohtsuki, Fumiyuki Adachi

    IEEE Signal Processing Letters 32 271-275 2024/12

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lsp.2024.3514804  

    ISSN: 1070-9908

    eISSN: 1558-2361

  27. Optimizing Energy Efficiency in Smart Grids Through Wireless Communication and Deep Learning Peer-reviewed

    Md Sabbir Hosen, Sidratul Montaha Silmee, Md. Mehadi Hasan Shamim, Filbert H. Juwono, Fumiyuki Adachi

    2024 IEEE 2nd International Conference on Electrical Engineering, Computer and Information Technology (ICEECIT) 6-11 2024/11/22

    Publisher: IEEE

    DOI: 10.1109/iceecit63698.2024.10859329  

  28. Constrained Multiobjective Decomposition Evolutionary Algorithm for UAV-Assisted Mobile Edge Computing Networks Peer-reviewed

    Lei Zhang, Fangqing Wen, Qinghe Zhang, Guan Gui, Hikmet Sari, Fumiyuki Adachi

    IEEE Internet of Things Journal 11 (22) 36673-36687 2024/11/15

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/jiot.2024.3417009  

    eISSN: 2327-4662 2372-2541

  29. Joint DOD and DOA Estimation for NLOS Target Using IRS-Aided Bistatic MIMO Radar Peer-reviewed

    Fangqing Wen, Junpeng Shi, Guan Gui, Chau Yuen, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 73 (10) 15798-15802 2024/10

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2024.3408813  

    ISSN: 0018-9545

    eISSN: 1939-9359

  30. Artificial Noise Elimination Without the Transmitter–Receiver Link CSI Peer-reviewed

    Hong Niu, Xia Lei, Gang Wu, Gang Wang, Chau Yuen, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 73 (9) 13206-13218 2024/09

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/tvt.2024.3391806  

    ISSN: 0018-9545

    eISSN: 1939-9359

  31. Graph Coloring-Based Pilot Assignment for User-Cluster-Centric Cell-Free Massive MIMO Systems Peer-reviewed

    Sijie Xia, Qiang Chen, Fumiyuki Adachi

    2024 IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS) 1-4 2024/08/21

    Publisher: IEEE

    DOI: 10.1109/apwcs61586.2024.10679280  

  32. Guest Editorial Special Issue on Current Research Trends and Open Challenges for Industrial Internet of Things Peer-reviewed

    Zhongxiang Wei, Sumei Sun, Christos Masouros, Jingjing Wang, Rose Qingyang Hu, Fumiyuki Adachi

    IEEE INTERNET OF THINGS JOURNAL 11 (16) 26548-26551 2024/08/15

    DOI: 10.1109/JIOT.2024.3428109  

    ISSN: 2327-4662

  33. Few-Shot Specific Emitter Identification via Neural Architecture Search and Deep Transfer Learning Peer-reviewed

    Feng Shi, Shufei Wang, Zhenxin Cai, Yang Peng, Yuchao Liu, Yu Wang, Fumiyuki Adachi, Guan Gui

    2024 IEEE 99th Vehicular Technology Conference (VTC2024-Spring) 1-5 2024/06/24

    Publisher: IEEE

    DOI: 10.1109/vtc2024-spring62846.2024.10683454  

  34. Enhanced Semi-Supervised Radar Emitter Identification via Virtual Adversarial Training Peer-reviewed

    Hong Wan, Ziqin Feng, Qianyun Zhang, Yu Wang, Xue Fu, Yun Lin, Fumiyuki Adachi, Guan Gui

    2024 IEEE 99th Vehicular Technology Conference (VTC2024-Spring) 1-5 2024/06/24

    Publisher: IEEE

    DOI: 10.1109/vtc2024-spring62846.2024.10683434  

  35. Interference Suppression Multiuser MMSE Multiplexing Combined with Optimal Joint Transmit/Receive Diversity for a Cellular Distributed MU-MIMO System Peer-reviewed

    Ryo Takahashi, Hidenori Matsuo, Qiang Chen, Fumiyuki Adachi

    2024 IEEE 99th Vehicular Technology Conference (VTC2024-Spring) 1-5 2024/06/24

    Publisher: IEEE

    DOI: 10.1109/vtc2024-spring62846.2024.10683064  

  36. 2D-DOA Estimation Auxiliary Localization of Anonymous UAV Using EMVS-MIMO Radar Peer-reviewed

    Fangqing Wen, Zhe Zhang, Hang Sun, Guan Gui, Hikmet Sari, Fumiyuki Adachi

    IEEE Internet of Things Journal 11 (9) 16225-16266 2024/05

    DOI: 10.1109/JIOT.2024.3351136  

  37. Online Trajectory Optimization for Energy-Efficient Cellular-Connected UAVs With Map Reconstruction. Peer-reviewed

    Haitao Zhao 0004, Qing Hao, Hao Huang, Guan Gui 0001, Tomoaki Ohtsuki, Hikmet Sari, Fumiyuki Adachi

    IEEE Trans. Veh. Technol. 73 (3) 3445-3456 2024/03

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/TVT.2023.3323349  

    ISSN: 0018-9545

    eISSN: 1939-9359

  38. SAR Image Wake Detection Based on Pseudo-Siamese Structure and Multidomain Feature Fusion Peer-reviewed

    Chunhui Zhao, Haodong Liu, Lu Wang, Tomoaki Ohtsuki, Fumiyuki Adachi

    IEEE Geoscience and Remote Sensing Letters 21 1-5 2024

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lgrs.2024.3436855  

    ISSN: 1545-598X

    eISSN: 1558-0571

  39. Adaptive Interference Suppressing Multi-User ZF in Cluster-Centric Cell-Free Massive MIMO Systems Peer-reviewed

    Sijie Xia, Chang Ge, Ryo Takahashi, Qiang Chen, Fumiyuki Adachi

    IEEE Communications Letters 2024

    DOI: 10.1109/LCOMM.2024.3384670  

  40. Deep Deterministic Policy Gradient-Based Intelligent Task Offloading for Vehicular Computing With Priority Experience Playback Peer-reviewed

    Yongan Guo, Derui Ma, Hao She, Guan Gui, Chau Yuen, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 2024

    DOI: 10.1109/TVT.2024.3378919  

  41. Polarized Intelligent Reflecting Surface Aided 2D-DOA Estimation for NLoS Sources Peer-reviewed

    Fangqing Wen, Han Wang, Guan Gui, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Wireless Communications 2024

    DOI: 10.1109/TWC.2023.3348520  

  42. Attention mechanism based intelligent channel feedback for mmWave massive MIMO systems.

    Yibin Zhang, Jinlong Sun, Guan Gui 0001, Yun Lin 0005, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    Peer Peer Netw. Appl. 17 (1) 261-283 2024/01

    DOI: 10.1007/s12083-023-01594-7  

    ISSN: 1936-6442

    eISSN: 1936-6450

  43. Joint Beamformer Design and Power Allocation Method for Hybrid RF-VLCP System.

    Shengnan Shi, Guan Gui 0001, Yun Lin 0005, Chau Yuen, Octavia A. Dobre, Fumiyuki Adachi

    IEEE Internet Things J. 11 (5) 7878-7892 2024

    DOI: 10.1109/JIOT.2023.3316434  

    eISSN: 2327-4662

  44. Air Reconfigurable Intelligent Surface Enhanced Multiuser NOMA System.

    Haitao Zhao 0004, Zhipeng Kong, Shengnan Shi, Hao Huang, Yiyang Ni, Guan Gui 0001, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Internet Things J. 11 (1) 29-39 2024/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/JIOT.2023.3279112  

    eISSN: 2327-4662

  45. Interpolative Metric Learning for Few-Shot Specific Emitter Identification.

    Cheng Wang, Xue Fu, Yu Wang 0078, Guan Gui 0001, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 72 (12) 16851-16855 2023/12

    DOI: 10.1109/TVT.2023.3296120  

    ISSN: 0018-9545

    eISSN: 1939-9359

  46. Joint User Pairing and Resource Allocation in Air-to-Ground Communication-Caching-Charging Integrated Network Based on NOMA.

    Yue Yin, Guan Gui 0001, Miao Liu 0002, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 72 (12) 15819-15828 2023/12

    DOI: 10.1109/TVT.2023.3291174  

    ISSN: 0018-9545

    eISSN: 1939-9359

  47. Lightweight Automatic Modulation Classification via Progressive Differentiable Architecture Search.

    Xixi Zhang 0001, Xiaofeng Chen, Yu Wang 0078, Guan Gui 0001, Bamidele Adebisi, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Cognitive Communications and Networking 9 (6) 1519-1530 2023/12

    DOI: 10.1109/TCCN.2023.3306391  

    eISSN: 2332-7731

  48. Multi-Agent Reinforcement Learning Resources Allocation Method Using Dueling Double Deep Q-Network in Vehicular Networks.

    Yuxin Ji, Yu Wang 0078, Haitao Zhao 0004, Guan Gui 0001, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 72 (10) 13447-13460 2023/10

    DOI: 10.1109/TVT.2023.3275546  

    ISSN: 0018-9545

    eISSN: 1939-9359

  49. Supervised Contrastive Learning for RFF Identification With Limited Samples.

    Yang Peng, Changbo Hou, Yibin Zhang, Yun Lin 0005, Guan Gui 0001, Haris Gacanin, Shiwen Mao, Fumiyuki Adachi

    IEEE Internet of Things Journal 10 (19) 17293-17306 2023/10

    DOI: 10.1109/JIOT.2023.3272628  

    eISSN: 2327-4662

  50. Optimization of Channel Segregation-Based Fractional Frequency Reuse for Inter-Cell Interference Coordination in Cellular Ultra-Dense RAN.

    Hidenori Matsuo, Ryo Takahashi, Fumiyuki Adachi

    IEICE Transactions on Communications 106 (10) 997-1003 2023/10

    DOI: 10.1587/transcom.2023ebt0001  

    ISSN: 0916-8516

    eISSN: 1745-1345

  51. Failure Detector Based on Vehicle Movement Prediction in Vehicular Ad-Hoc Networks.

    Jiaxi Liu, Si Chen, Guan Gui 0001, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 72 (9) 11657-11667 2023/09

    DOI: 10.1109/TVT.2023.3266106  

    ISSN: 0018-9545

    eISSN: 1939-9359

  52. Uplink Postcoding in User-Cluster-Centric Cell-Free Massive MIMO.

    Ryo Takahashi, Hidenori Matsuo, Sijie Xia, Qiang Chen 0001, Fumiyuki Adachi

    IEICE Transactions on Communications 106 (9) 748-757 2023/09

    DOI: 10.1587/transcom.2022fgt0001  

    ISSN: 0916-8516

    eISSN: 1745-1345

  53. Regularization Strategy Aided Robust Unsupervised Learning for Wireless Resource Allocation.

    Hao Huang, Yun Lin 0005, Guan Gui 0001, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 72 (7) 9647-9652 2023/07

    DOI: 10.1109/TVT.2023.3250963  

    ISSN: 0018-9545

    eISSN: 1939-9359

  54. Deep Regularized Waveform Learning for Beam Prediction With Limited Samples in Non-Cooperative mmWave Systems.

    Hao Huang, Guan Gui 0001, Haris Gacanin, Chau Yuen, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 72 (7) 9614-9619 2023/07

    DOI: 10.1109/TVT.2023.3248224  

    ISSN: 0018-9545

    eISSN: 1939-9359

  55. User-initiated Suboptial Multiuser Joint Transmit-Receive Diversity in An Asymmetric MIMO Fading Channel

    Fumiyuki Adachi, Ryo Takahashi

    2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring) 1-5 2023/06

    Publisher: IEEE

    DOI: 10.1109/vtc2023-spring57618.2023.10200867  

  56. Deep Reinforcement Learning Aided Online Trajectory Optimization of Cellular-Connected UAVs with Offline Map Reconstruction

    Qing Hao, Haitao Zhao, Hao Huang, Guan Gui, Tomoaki Ohtsuki, Fumiyuki Adachi

    2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring) 2023/06

    Publisher: IEEE

    DOI: 10.1109/vtc2023-spring57618.2023.10200397  

  57. Rogue Emitter Detection Using Hybrid Network of Denoising Autoencoder and Deep Metric Learning

    Zeyang Yang, Xue Fu, Guan Gui, Yun Lin, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    ICC 2023 - IEEE International Conference on Communications 4780-4785 2023/05/28

    Publisher: IEEE

    DOI: 10.1109/icc45041.2023.10278847  

  58. 2-Layer Interference Coordination Framework Based on Graph Coloring Algorithm for a Cellular System With Distributed MU-MIMO.

    Chang Ge 0005, Sijie Xia, Qiang Chen 0001, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 72 (3) 3557-3568 2023/03

    DOI: 10.1109/TVT.2022.3219411  

    ISSN: 0018-9545

    eISSN: 1939-9359

  59. Learning Based on Graph: A Joint Interference Coordination for Cluster-Wise Distributed MU-MIMO.

    Chang Ge 0005, Sijie Xia, Qiang Chen 0001, Fumiyuki Adachi

    IEEE Communications Letters 27 (3) 871-875 2023/03

    DOI: 10.1109/LCOMM.2023.3239605  

    ISSN: 1089-7798

    eISSN: 1558-2558

  60. Robust Distributed Estimation of Wireless Sensor Networks Under Adversarial Attacks

    Chao Yang Chen, Dingrong Tan, Pei Li, Juan Chen, Guan Gui, Bamidele Adebisi, Haris Gacanin, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 2023

    DOI: 10.1109/TVT.2023.3340243  

    ISSN: 0018-9545

    eISSN: 1939-9359

  61. Performance Evaluation of Interference Aware MMSE and Interference Suppression MMSE Techniques for A Cellular Distributed MU-MIMO System.

    Ryo Takahashi, Hidenori Matsuo, Fumiyuki Adachi

    APWCS 1-5 2023

    Publisher: IEEE

    DOI: 10.1109/APWCS60142.2023.10234073  

  62. Fast Localizing for Anonymous UAVs Oriented Toward Polarized Massive MIMO Systems.

    Fangqing Wen, Dong Ren, Xixi Zhang 0001, Guan Gui 0001, Bamidele Adebisi, Hikmet Sari, Fumiyuki Adachi

    IEEE Internet of Things Journal 10 (22) 20094-20106 2023

    DOI: 10.1109/JIOT.2023.3282644  

    eISSN: 2327-4662

  63. Semi-Supervised Specific Emitter Identification Method Using Metric-Adversarial Training.

    Xue Fu, Yang Peng, Yuchao Liu, Yun Lin 0005, Guan Gui 0001, Haris Gacanin, Fumiyuki Adachi

    IEEE Internet of Things Journal 10 (12) 10778-10789 2023

    DOI: 10.1109/JIOT.2023.3240242  

    eISSN: 2327-4662

  64. User Scheduling and Clustering for Distributed Antenna Network Using Quantum Computing

    Keishi HANAKAGO, Ryo TAKAHASHI, Takahiro OHYAMA, Fumiyuki ADACHI

    IEICE Transactions on Communications 106 (11) 1210-1218 2023

    Publisher: Institute of Electronics, Information and Communications Engineers (IEICE)

    DOI: 10.1587/transcom.2023ebt0004  

    ISSN: 0916-8516

    eISSN: 1745-1345

  65. Few-Shot Specific Emitter Identification via Deep Metric Ensemble Learning

    Yu Wang, Guan Gui, Yun Lin, Hsiao-Chun Wu, Chau Yuen, Fumiyuki Adachi

    IEEE Internet of Things Journal 2022/12/15

    DOI: 10.1109/JIOT.2022.3194967  

  66. A Robust CSI- Based Passive Perception Method Using CNN and Attention-Based Bi-Directional LSTM

    Zhengran He, Guozhen Xu, Siyuan Xu, Yu Wang, Guan Gui, Haris Gacanin, Fumiyuki Adachi

    GLOBECOM 2022 - 2022 IEEE Global Communications Conference 1862-1867 2022/12/04

    Publisher: IEEE

    DOI: 10.1109/globecom48099.2022.10001549  

  67. A Novel Channel Identification Architecture for mmWave Systems Based on Eigen Features

    Yibin Zhang, Jinlong Sun, Guan Gui, Haris Gacanin, Fumiyuki Adachi

    2022 14th International Conference on Wireless Communications and Signal Processing (WCSP) 550-555 2022/11/01

    Publisher: IEEE

    DOI: 10.1109/wcsp55476.2022.10039221  

  68. Unsupervised Learning-Inspired Power Control Methods for Energy-Efficient Wireless Networks Over Fading Channels

    Hao Huang, Miao Liu, Guan Gui, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Wireless Communications 2022/11

    DOI: 10.1109/TWC.2022.3180035  

  69. On Design Concept of Cellular Distributed MU-MIMO for Ultra-dense RAN

    Fumiyuki Adachi, Ryo Takahashi, Hidenori Matsuo, Sijie Xia, Chang Ge, Qiang Chen

    2022 27th Asia Pacific Conference on Communications (APCC) 266-271 2022/10/19

    Publisher: IEEE

    DOI: 10.1109/apcc55198.2022.9943686  

  70. User-driven Suboptimal Joint Transmit-receive Diversity in Asymmetric MIMO Fading Channel

    Fumiyuki Adachi, Ryo Takahashi

    2022 27th Asia Pacific Conference on Communications (APCC) 214-219 2022/10/19

    Publisher: IEEE

    DOI: 10.1109/apcc55198.2022.9943784  

  71. A Study on Cluster-Centric Cell-Free Massive MIMO System

    Sijie Xia, Chang Ge, Ryo Takahashi, Qiang Chen, Fumiyuki Adachi

    2022 27th Asia Pacific Conference on Communications (APCC) 247-252 2022/10/19

    Publisher: IEEE

    DOI: 10.1109/apcc55198.2022.9943729  

  72. Adaptive Interference/Radio Resource Management for 5G Advanced Ultra-Dense RAN Using Distributed Antenna

    TAKAHASHI Ryo, MATSUO Hidenori, ADACHI Fumiyuki

    J105-B (10) 726-740 2022/10

    Publisher:

    DOI: 10.14923/transcomj.2021mji0001  

    eISSN: 1881-0209

    More details Close

    In order to accommodate the ever-increasing mobile data traffic, 5G systems need to be enhanced in terms of the radio link capacity and thus, ultra-densification of radio access network (RAN) is essential. In this paper, we describe our study on ultra-dense RAN in which a large number of antennas are distributed in a base station coverage area (BS cell). Large-scale distributed multiuser MIMO (MU-MIMO) is a powerful means to enhance the system capacity. However, the computational complexity of large-scale distributed MU-MIMO is prohibitively high. Although the computational complexity can be reduced by forming user clusters consisting of neighboring users and performing small-scale cluster-wise distributed MU-MIMO simultaneously, the inter-cluster interference is produced if the same radio resource is used in all clusters. Furthermore, if distributed radio resource management for each BS-cell is introduced to achieve highly flexible and scalable RAN, the inter-cell interference is produced. To solve the above interference problems, we propose an interference and radio resource management, which is an integration of centralized inter-cluster interference coordination using multi-layered user clustering and autonomous distributed inter-cell interference coordination using channel segregation based fractional frequency reuse (CS-FFR). It is confirmed by computer simulation that the proposed interference and radio resource management improve the radio link capacity while avoiding the computational complexity problem of large-scale distributed MU-MIMO in addition to realizing autonomous distributed radio resource management.

  73. Handover Strategy Based on Side Information in Air-Ground Integrated Vehicular Networks

    Yuzhi Zhou, Jinlong Sun, Jie Yang, Guan Gui, Haris Gacanin, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 2022/10

    DOI: 10.1109/TVT.2022.3188324  

  74. Malware Traffic Classification Using Domain Adaptation and Ladder Network for Secure Industrial Internet of Things

    Jinhui Ning, Guan Gui, Yu Wang, Jie Yang, Bamidele Adebisi, Song Ci, Haris Gacanin, Fumiyuki Adachi

    IEEE Internet of Things Journal 2022/09/15

    DOI: 10.1109/JIOT.2021.3131981  

  75. Decentralized Automatic Modulation Classification Method Based on Lightweight Neural Network

    Biao Dong, Guozhen Xu, Xue Fu, Heng Dong, Guan Gui, Haris Gacanin, Fumiyuki Adachi

    2022 IEEE 33rd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) 259-264 2022/09/12

    Publisher: IEEE

    DOI: 10.1109/pimrc54779.2022.9978060  

  76. Evaluation of Uplink Capacity of User-Cluster-Centric Cell-Free massive MIMO

    Ryo Takahashi, Hidenori Matsuo, Sijie Xia, Qiang Chen, Fumiyuki Adachi

    2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall) 1-5 2022/09

    Publisher: IEEE

    DOI: 10.1109/vtc2022-fall57202.2022.10013011  

  77. A Novel Semi-Supervised Learning Framework for Specific Emitter Identification

    Xue Fu, Yu Wang, Yun Lin, Guan Gui, Haris Gacanin, Fumiyuki Adachi

    2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall) 1-5 2022/09

    Publisher: IEEE

    DOI: 10.1109/vtc2022-fall57202.2022.10012910  

  78. Multi-Agent Reinforcement Learning Aided Resources Allocation Method in Vehicular Networks

    Yuxin Ji, Xixi Zhang, Yu Wang, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi, Guan Gui

    2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall) 1-5 2022/09

    Publisher: IEEE

    DOI: 10.1109/vtc2022-fall57202.2022.10012735  

  79. NAS-AMR: Neural Architecture Search-Based Automatic Modulation Recognition for Integrated Sensing and Communication Systems

    Xixi Zhang, Haitao Zhao, Hongbo Zhu, Bamidele Adebisi, Guan Gui, Haris Gacanin, Fumiyuki Adachi

    IEEE Transactions on Cognitive Communications and Networking 2022/09

    DOI: 10.1109/TCCN.2022.3169740  

  80. Capacity-Fairness Tradeoff for Optimal Power Allocation in Cluster-wise MU-MIMO System

    Sijie Xia, Chang Ge, Qiang Chen, Fumiyuki Adachi

    2022 IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS) 16-20 2022/08/24

    Publisher: IEEE

    DOI: 10.1109/apwcs55727.2022.9906515  

  81. Automatic Modulation Classification Based on Decentralized Learning and Ensemble Learning

    Xue Fu, Guan Gui, Yu Wang, Haris Gacanin, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 71 (7) 7942-7946 2022/07

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TVT.2022.3164935  

  82. A Recursive Solution of Optimal Joint Transmit-receive Diversity Weight Vectors

    Fumiyuki Adachi, Ryo Takahashi

    2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring) 121 (234(RCS2021 143-174)) 1-5 2022/06

    Publisher: IEEE

    DOI: 10.1109/vtc2022-spring54318.2022.9860753  

    ISSN: 2432-6380

  83. Scalable and Reconfigurable Distributed MU-MIMO System

    Ryo Takahashi, Hidenori Matsuo, Fumiyuki Adachi

    2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring) 1-5 2022/06

    Publisher: IEEE

    DOI: 10.1109/vtc2022-spring54318.2022.9861030  

  84. Federated Learning for Automatic Modulation Classification Under Class Imbalance and Varying Noise Condition

    Yu Wang, Guan Gui, Haris Gacanin, Bamidele Adebisi, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Cognitive Communications and Networking 2022/03

    DOI: 10.1109/TCCN.2021.3089738  

  85. Lightweight Automatic Modulation Classification Based on Decentralized Learning

    Xue Fu, Guan Gui, Yu Wang, Tomoaki Ohtsuki, Bamidele Adebisi, Haris Gacanin, Fumiyuki Adachi

    IEEE Transactions on Cognitive Communications and Networking 2022/03

    DOI: 10.1109/TCCN.2021.3089178  

  86. Machine Learning‐Aided Energy Efficiency Strategy for Multiuser Cooperative Networks

    Lin Shan, Ou Zhao, Katsuhiro Temma, Fumihide Kojima, Fumiyuki Adachi, Takeshi Matsumura

    Wireless Communications and Mobile Computing 2022/01/17

    DOI: 10.1155/2022/3951376  

  87. Enabling Grant-Free URLLC: An Overview of Principle and Enhancements by Massive MIMO

    Jie Ding, Mahyar Nemati, Shiva Raj Pokhrel, Ok-Sun Park, Jinho Choi, Fumiyuki Adachi

    IEEE Internet of Things Journal 9 (1) 384-400 2022/01/01

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/JIOT.2021.3107242  

  88. Cellular Structuring and Clustering for Distributed Antenna Systems

    Sijie Xia, Chang Ge, Qiang Chen, Fumiyuki Adachi

    2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC) 2021/12/14

    Publisher: IEEE

    DOI: 10.1109/wpmc52694.2021.9700460  

  89. Reinforcement Learning-based Interference Coordination for Distributed MU-MIMO

    Chang Ge, Sijie Xia, Qiang Chen, Fumiyuki Adachi

    2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC) 2021/12/14

    Publisher: IEEE

    DOI: 10.1109/wpmc52694.2021.9700445  

  90. Joint UL/DL Resource Allocation for UAV-Aided Full-Duplex NOMA Communications

    Wenjuan Shi, Yanjing Sun, Miao Liu, Hua Xu, Guan Gui, Tomoaki Ohtsuki, Bamidele Adebisi, Haris Gacanin, Fumiyuki Adachi

    IEEE Transactions on Communications 69 (12) 8474-8487 2021/12

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TCOMM.2021.3110298  

  91. Graph Coloring-based Interference Coordination for Ultra-Dense Cellular Network with Distributed MU-MIMO

    Chang Ge, Sijie Xia, Qiang Chen, Fumiyuki Adachi

    2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall) 2021/09

    Publisher: IEEE

    DOI: 10.1109/vtc2021-fall52928.2021.9625356  

  92. Robust Resource Allocation for Two-Tier HetNets: An Interference-Efficiency Perspective

    Yongjun Xu, Guan Gui, Tomoaki Ohtsuki, Haris Gacanin, Bamidele Adebisi, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Green Communications and Networking 5 (3) 1514-1528 2021/09

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TGCN.2021.3090592  

  93. A Theoretical Study on Suboptimal Joint Transmit-Receive Diversity in Correlated Rayleigh Fading Channels

    Fumiyuki Adachi, Ryo Takahashi

    17th IEEE VTS Asia Pacific Wireless Communications Symposium, APWCS 2021 - Proceedings 121 (72(RCS2021 29-76)) 2021/08/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/APWCS50173.2021.9548716  

    ISSN: 2432-6380

  94. Multi-Task Learning for Generalized Automatic Modulation Classification Under Non-Gaussian Noise With Varying SNR Conditions

    Yu Wang, Guan Gui, Tomoaki Ohtsuki, Fumiyuki Adachi

    IEEE Transactions on Wireless Communications 20 (6) 3587-3596 2021/06

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TWC.2021.3052222  

  95. On Understanding of Massive MIMO Beam-forming from Multi-user Joint Transmit-receive Diversity Principle

    Fumiyuki Adachi, Ryo Takahashi

    IEEE Vehicular Technology Conference 2021- 2021/04/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTC2021-Spring51267.2021.9448671  

    ISSN: 1550-2252

  96. Performance of Enhanced Interference Coordination Using Multi-layered Clustering for 5G Advanced Ultra-dense RAN

    Ryo Takahashi, Hidenori Matsuo, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2021- 2021/04/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTC2021-Spring51267.2021.9448680  

    ISSN: 1550-2252

  97. Cross-Layer Resource Allocation for UAV-Assisted Wireless Caching Networks With NOMA

    Yue Yin, Miao Liu, Guan Gui, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 70 (4) 3428-3438 2021/04

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TVT.2021.3064032  

  98. Study on cluster formation for distributed MU-MIMO

    Sijie Xia, Chang Ge, Qiang Chen, Fumiyuki Adachi

    IEICE Communications Express 10 (3) 167-173 2021/03/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1587/comex.2020xbl0180  

    eISSN: 2187-0136

  99. Aviation Data Lake: Using Side Information to Enhance Future Air-Ground Vehicle Networks

    Jinlong Sun, Guan Gui, Hikmet Sari, Haris Gacanin, Fumiyuki Adachi

    IEEE Vehicular Technology Magazine 16 (1) 40-48 2021/03

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/MVT.2020.3014598  

  100. A Survey on Resource Allocation for 5G Heterogeneous Networks: Current Research, Future Trends, and Challenges

    Yongjun Xu, Guan Gui, Haris Gacanin, Fumiyuki Adachi

    IEEE Communications Surveys & Tutorials 23 (2) 668-695 2021/02

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/COMST.2021.3059896  

  101. Energy Efficiency Maximization in NOMA Enabled Backscatter Communications With QoS Guarantee

    Yongjun Xu, Zhijin Qin, Guan Gui, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Wireless Communications Letters 1-1 2021/02

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/LWC.2020.3031042  

  102. CV-3DCNN: Complex-Valued Deep Learning for CSI Prediction in FDD Massive MIMO Systems

    Yibin Zhang, Jie Wang, Jinlong Sun, Bamidele Adebisi, Haris Gacanin, Guan Gui, Fumiyuki Adachi

    IEEE Wireless Communications Letters 1-1 2021/02

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/LWC.2020.3027774  

  103. Multiple Unmanned-Aerial-Vehicles Deployment and User Pairing for Nonorthogonal Multiple Access Schemes

    Jie Wang, Miao Liu, Jinlong Sun, Guan Gui, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Internet of Things Journal 8 (3) 1883-1895 2021/02/01

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/JIOT.2020.3015702  

  104. A graph coloring-based interference coordination algorithm for cluster-wise ultra-dense RAN

    Chang Ge, Sijie Xia, Qiang Chen, Fumiyuki Adachi

    IEICE Communications Express 10 (2) 99-104 2021/02/01

    Publisher: Institute of Electronics, Information and Communications Engineers (IEICE)

    DOI: 10.1587/comex.2020xbl0160  

    eISSN: 2187-0136

  105. An improved method in graph coloring algorithm for interference coordination in cluster-wise ultra-dense RAN

    Chang Ge, Sijie Xia, Qiang Chen, Fumiyuki Adachi

    2020 International Symposium on Antennas and Propagation, ISAP 2020 293-294 2021/01/25

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.23919/ISAP47053.2021.9391334  

  106. Lightweight network and model aggregation for automatic modulation classification in wireless communications

    Xue Fu, Guan Gui, Yu Wang, Tomoaki Ohtsuki, Bamidele Adebisi, Haris Gacanin, Fumiyuki Adachi

    IEEE Wireless Communications and Networking Conference, WCNC 2021- 2021

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/WCNC49053.2021.9417592  

    ISSN: 1525-3511

  107. A novel compression CSI feedback based on deep learning for FDD massive MIMO systems

    Yuting Wang, Yibin Zhang, Jinlong Sun, Guan Gui, Tomoaki Ohtsuki, Fumiyuki Adachi

    IEEE Wireless Communications and Networking Conference, WCNC 2021- 2021

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/WCNC49053.2021.9417115  

    ISSN: 1525-3511

  108. Deep transfer learning for 5G massive MIMO downlink CSI feedback

    Jun Zeng, Zhengran He, Jinlong Sun, Bamidele Adebisi, Haris Gacanin, Guan Gui, Fumiyuki Adachi

    IEEE Wireless Communications and Networking Conference, WCNC 2021- 2021

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/WCNC49053.2021.9417349  

    ISSN: 1525-3511

  109. Joint multi-layered user clustering and scheduling for ultra-dense RAN using distributed MIMO

    Ryo Takahashi, Hidenori Matsuo, Fumiyuki Adachi

    IEICE Transactions on Communications E104B (9) 1097-1109 2021

    Publisher: Institute of Electronics Information Communication Engineers

    DOI: 10.1587/transcom.2020FGP0010  

    ISSN: 1745-1345 0916-8516

  110. QoS-Oriented Dynamic Power Allocation in NOMA-Based Wireless Caching Networks

    Yue Yin, Miao Liu, Guan Gui, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Wireless Communications Letters 10 (1) 82-86 2021/01

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/LWC.2020.3021204  

  111. Surveillance Plane Aided Air-Ground Integrated Vehicular Networks: Architectures, Applications, and Potential

    Jinlong Sun, Fan Liu, Yuzhi Zhou, Guan Gui, Tomoaki Ohtsuki, Song Guo, Fumiyuki Adachi

    IEEE Wireless Communications 27 (6) 122-128 2020/12/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/MWC.001.2000079  

    ISSN: 1558-0687 1536-1284

  112. Challenges for beyond 5G: ultra-densification of radio access network

    Fumiyuki Adachi, Ryo Takahashi, Hidenori Matsuo

    Tongxin Xuebao/Journal on Communications 41 (11) 1-11 2020/11/25

    Publisher: Editorial Board of Journal on Communications

    DOI: 10.11959/j.issn.1000-436x.2020240  

    ISSN: 1000-436X

  113. Automatic Modulation Recognition Method for Multiple Antenna System Based on Convolutional Neural Network

    Juan Wang, Yu Wang, Wenmei Li, Guan Gui, Haris Gacanin, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2020- 2020/11/01

    DOI: 10.1109/VTC2020-Fall49728.2020.9348790  

    ISSN: 1550-2252

  114. Multi-user MIMO using ZF-based Multiplexing Coordinated with User-wise Spatial Diversity

    Fumiyuki Adachi, Ryo Takahashi

    IEEE Vehicular Technology Conference 2020- 2020/11/01

    DOI: 10.1109/VTC2020-Fall49728.2020.9348800  

    ISSN: 1550-2252

  115. Joint Multilayered User Clustering and Scheduling for 5G Advanced Ultra-dense RAN

    Ryo Takahashi, Hidenori Matsuo, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2020- 2020/11/01

    DOI: 10.1109/VTC2020-Fall49728.2020.9348724  

    ISSN: 1550-2252

  116. A study on user-antenna cluster formation for cluster-wise MU-MIMO

    Sijie Xia, Chang Ge, Qiang Chen, Fumiyuki Adachi

    International Symposium on Wireless Personal Multimedia Communications, WPMC 2020- 2020/10/19

    DOI: 10.1109/WPMC50192.2020.9309519  

    ISSN: 1347-6890

  117. 2-step Graph Coloring Algorithm for Cluster-wise Distributed MU-MIMO in Ultra-dense RAN

    Chang Ge, Sijie Xia, Qiang Chen, Fumiyuki Adachi

    2020 23rd International Symposium on Wireless Personal Multimedia Communications (WPMC) 2020/10/19

    Publisher: IEEE

    DOI: 10.1109/wpmc50192.2020.9309477  

  118. Principal Component Analysis-Based Broadband Hybrid Precoding for Millimeter-Wave Massive MIMO Systems

    Yiwei Sun, Zhen Gao, Hua Wang, Byonghyo Shim, Guan Gui, Guoqiang Mao, Fumiyuki Adachi

    IEEE Transactions on Wireless Communications 19 (10) 6331-6346 2020/10

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TWC.2020.3002719  

  119. 6G: Opening New Horizons for Integration of Comfort, Security, and Intelligence Peer-reviewed

    Guan Gui, Miao Liu, Fengxiao Tang, Nei Kato, Fumiyuki Adachi

    IEEE Wireless Communications 27 (5) 126-132 2020/10

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/mwc.001.1900516  

    ISSN: 1536-1284

    eISSN: 1558-0687

  120. Deep Learning for Wireless Communications: An Emerging Interdisciplinary Paradigm

    Linglong Dai, Ruicheng Jiao, Fumiyuki Adachi, H. Vincent Poor, Lajos Hanzo

    IEEE Wireless Communications 27 (4) 133-139 2020/08/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/MWC.001.1900491  

    ISSN: 1558-0687 1536-1284

  121. Semi-Supervised Machine Learning Aided Anomaly Detection Method in Cellular Networks

    Yutao Lu, Juan Wang, Miao Liu, Kaixuan Zhang, Guan Gui, Tomoaki Ohtsuki, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 69 (8) 8459-8467 2020/08

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TVT.2020.2995160  

  122. Deep Learning-Based Sum Data Rate and Energy Efficiency Optimization for MIMO-NOMA Systems

    Hongji Huang, Yuchun Yang, Zhiguo Ding, Hong Wang, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Wireless Communications 19 (8) 5373-5388 2020/08

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TWC.2020.2992786  

  123. Transfer Learning for Semi-Supervised Automatic Modulation Classification in ZF-MIMO Systems

    Yu Wang, Guan Gui, Haris Gacanin, Tomoaki Ohtsuki, Hikmet Sari, Fumiyuki Adachi

    IEEE Journal on Emerging and Selected Topics in Circuits and Systems 10 (2) 231-239 2020/06

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/JETCAS.2020.2992128  

  124. Enhanced Interference Coordination and Radio Resource Management for 5G Advanced Ultra-dense RAN

    Fumiyuki Adachi, Ryo Takahashi, Hidenori Matsuo

    IEEE Vehicular Technology Conference 2020- 2020/05/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTC2020-Spring48590.2020.9128516  

    ISSN: 1550-2252

  125. Automatic Modulation Classification for MIMO Systems via Deep Learning and Zero-Forcing Equalization

    Yu Wang, Jie Gui, Yue Yin, Juan Wang, Jinlong Sun, Guan Gui, Haris Gacanin, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 69 (5) 5688-5692 2020/05

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TVT.2020.2981995  

  126. Deep Learning Method for Generalized Modulation Classification under Varying Noise Condition

    Yu Wang, Guan Gui, Nan Zhao, Hao Huang, Miao Liu, Jinlong Sun, Haris Gacanin, Hikmet Sari, Adachi Fumiyuki

    2020 International Conference on Computing, Networking and Communications, ICNC 2020 938-943 2020/02/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/ICNC47757.2020.9049786  

  127. Uplink Precoding Optimization for NOMA Cellular-Connected UAV Networks

    Xiaowei Pang, Guan Gui, Nan Zhao, Weile Zhang, Yunfei Chen, Zhiguo Ding, Fumiyuki Adachi

    IEEE Transactions on Communications 68 (2) 1271-1283 2020/02

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TCOMM.2019.2954136  

  128. Enhanced Interference Coordination and Radio Resource Management for 5G Advanced Ultra-dense RAN

    Fumiyuki Adachi, Ryo Takahashi, Hidenori Matsuo

    2020 IEEE 91ST VEHICULAR TECHNOLOGY CONFERENCE, VTC2020-SPRING 2020

    ISSN: 2577-2465

  129. Uplink SCMA with STBC in Fading Channels

    Huan-Ying Li, Zi-Ding Liu, Qi-Yue Yu, Wei Xiang, Fumiyuki Adachi

    2020 IEEE 91ST VEHICULAR TECHNOLOGY CONFERENCE, VTC2020-SPRING 2020

    ISSN: 2577-2465

  130. Deep Reinforcement Learning for UAV Navigation Through Massive MIMO Technique

    Hongji Huang, Yuchun Yang, Hong Wang, Zhiguo Ding, Hikmet Sari, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 69 (1) 1117-1121 2020/01

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TVT.2019.2952549  

  131. Research Project to Realize Various High-reliability Communications in Advanced 5G Network.

    Takahide Murakami, Yoji Kishi, Koji Ishibashi, Keisuke Kasai, Hiroyuki Shinbo, Morihiko Tamai, Kensuke Tsuda, Masataka Nakazawa, Yu Tsukamoto, Hiroyuki Yokoyama, Yoshimi Fujii, Yuta Seki, Shinobu Nanba, Takanori Hara, Fumiyuki Adachi, Takayuki Sotoyama

    2020 IEEE Wireless Communications and Networking Conference(WCNC) 1-8 2020

    DOI: 10.1109/WCNC45663.2020.9120477  

    ISSN: 1525-3511

  132. A study on UE clustering and antenna selection for distributed MIMO cooperative transmission using multi-user MMSE-SVD

    Yuta Seki, Tomoyuki Saito, Fumiyuki Adachi

    Proceedings of 2019 25th Asia-Pacific Conference on Communications, APCC 2019 73-77 2019/11/01

    DOI: 10.1109/APCC47188.2019.9026519  

    ISSN: 2163-0771

  133. Distributed MIMO cooperative transmission technique and its performance

    Fumiyuki Adachi, Amnart Boonkajay, Tomoyuki Saito, Yuta Seki

    2019 IEEE/CIC International Conference on Communications in China, ICCC 2019 118 (474(RCS2018 282-338)(Web)) 213-218 2019/08/01

    DOI: 10.1109/ICCChina.2019.8855832  

    ISSN: 0913-5685

  134. Modified adaptive 2-Step ICIC for distributed MIMO system with user clustering

    Amnart Boonkajay, Tomoyuki Saito, Fumiyuki Adachi

    Proceedings - 2019 IEEE VTS Asia Pacific Wireless Communications Symposium, APWCS 2019 2019/08/01

    DOI: 10.1109/VTS-APWCS.2019.8851661  

  135. D2D Cooperative Communication Framework for Energy Saving: Evaluation of Energy Efficiency using Smartphone Test-Bed Peer-reviewed

    HATTORI Kiyohiko, TEMMA Katsuhiro, ZHAO Ou, SHAN Lin, ADACHI Fumiyuki, OWADA Yasunori

    J102-B (6) 435-444 2019/06

    DOI: 10.14923/transcomj.2018mop0006  

    ISSN: 1344-4697

    More details Close

    Our main aim is to develop and demonstrate energy saving technologies for mobile terminals (MTs) which have multiple wireless interfaces (i.e., LTE and WiMAX interfaces for Wide Area Network (WAN), Wireless LAN and Bluetooth interfaces for Local Area Network (LAN)). We propose cooperative framework to take advantage of the good channel quality of WAN and LAN links to save energy in MTs. In the cooperative framework, how to select proxy MT which connects to the WAN and provides the LAN connection to cooperative MTs is an important issue. We constructed a smartphone test-bed to evaluate and show the energy gains that can be achieved in different channel conditions and number of cooperative MTs. As a result, it shows that up to 47% energy saving can be achieved.

  136. Low-complexity channel tracking in fast-varying MIMO environments

    Ruoxu Wang, Wei Peng, Tao Jiang, Fumiyuki Adachi

    2019 15th International Wireless Communications and Mobile Computing Conference, IWCMC 2019 1339-1343 2019/06/01

    DOI: 10.1109/IWCMC.2019.8766471  

    ISSN: 2376-6492

  137. Evaluation of Machine Learnable Bandwidth Allocation Strategy for User Cooperative Traffic Forwarding

    Shan, L., Zhao, O., Temma, K., Hattori, K., Kojima, F., Adachi, F.

    IEEE Access 7 2019/06

    DOI: 10.1109/ACCESS.2019.2925431  

  138. 5G R&d activities for high capacity technologies with ultra high-density multi-band and multi-access layered cells Peer-reviewed

    Morihiko Minowa, Hiroyuki Seki, Yukihiko Okumura, Satoshi Suyama, Jun Terada, Satoshi Shigematsu, Yasushi Takatori, Hiroaki Asano, Yukio Hirano, Yasushi Yamao, Fumiyuki Adachi, Masataka Nakazawa

    IEEE Vehicular Technology Conference 2019- 2019/04/01

    DOI: 10.1109/VTCSpring.2019.8746622  

    ISSN: 1550-2252

  139. Transceiver Design and Multihop D2D for UAV IoT Coverage in Disasters

    Xiaonan Liu, Zan Li, Nan Zhao, Weixiao Meng, Guan Gui, Yunfei Chen, Fumiyuki Adachi

    IEEE Internet of Things Journal 6 (2) 1803-1815 2019/04

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/JIOT.2018.2877504  

  140. Deep-Learning-Based Millimeter-Wave Massive MIMO for Hybrid Precoding

    Hongji Huang, Yiwei Song, Jie Yang, Guan Gui, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 1-1 2019/03

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TVT.2019.2893928  

  141. Modified blind selected mapping for OFDM/single-carrier signal transmission

    Amnart Boonkajay, Fumiyuki Adachi

    2018 24th Asia-Pacific Conference on Communications, APCC 2018 45-50 2019/02/01

    DOI: 10.1109/APCC.2018.8633479  

  142. De-centralized adaptive 2-step inter-cell interference coordination in distributed MIMO

    Tomoyuki Saito, Fumiyuki Adachi

    2018 24th Asia-Pacific Conference on Communications, APCC 2018 224-228 2019/02/01

    DOI: 10.1109/APCC.2018.8633471  

  143. Precoding Optimization for NOMA UAV with Cellular Connections

    Xiaowei Pang, Nan Zhao, Weile Zhang, Yunfei Chen, Jie Tang, Zhiguo Ding, Fumiyuki Adachi

    2019 IEEE 30TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC) 734-739 2019

    DOI: 10.1109/pimrc.2019.8904351  

    ISSN: 2166-9570

  144. PRIDE: Path Integration Based Delay Estimation in Multi-Device Multi-Path Environments

    Wei Peng, Xuehui Zhao, Tao Jiang, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 67 (12) 11587-11596 2018/12

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TVT.2018.2872020  

  145. Study on Frequency-domain Equalization Scheme for High-speed Digital Power Line Carrier Systems

    Norio Sasaki, Qiang Chen, Fumiyuki Adachi

    IEEJ Transactions on Electronics, Information and Systems 138 (12) 1529-1538 2018/12/01

    Publisher: Institute of Electrical Engineers of Japan (IEE Japan)

    DOI: 10.1541/ieejeiss.138.1529  

    ISSN: 0385-4221

    eISSN: 1348-8155

    More details Close

    In this paper, we study a minimum mean square error based frequency-domain equalization (MMSE-FDE)scheme for a high-speed digital power line carrier system achieving 1.1 Mbps using 300 kHz bandwidth. Training sequence (TS) inserted single-carrier (SC) block transmission is employed. In the TS-SC block transmission, the Zadoff-Chu sequence is used as TS. TS acts as the cyclic prefix (CP) for MMSE-FDE. The channel estimation and noise power estimation are done using TS for computing the MMSE-FDE weight. In this paper, we design a digital power line carrier system of 210 ksymbol/s, in which the TS length of 64 symbols (Zadoff-Chu sequence) and the data block length of 960 symbols (64QAM) are used for achieving 1.1 Mbps transmission. The transmission performance of the designed digital power line carrier system is evaluated by computer simulation in terms of the normalization mean square error (NMSE) of channel estimation, the mean square error (MSE) of MMSE-FDE, and the bit error rate (BER). It is confirmed that MMSE-FDE is superior to MMSE time-domain equalization (MMSE-TDE) and zero-forcing (ZF) FDE and it achieves the required BER of 1×10-6 when the received Eb/N0=25 dB. Furthermore, we clarified the optimum value of forgetting factors of the first order infinite impulse response (IIR) filters used for channel estimation and noise estimation.

  146. A Distributed Satisfactory Sleep Mode Scheme for Self-Organizing Heterogeneous Networks

    Atefeh Hajijamali Arani, Mohammad Javad Omidi, Abolfazl Mehbodniya, Fumiyuki Adachi

    26th Iranian Conference on Electrical Engineering, ICEE 2018 476-481 2018/09/25

    DOI: 10.1109/ICEE.2018.8472421  

    ISSN: 2164-7054

  147. Statistical CSI Acquisition in the Nonstationary Massive MIMO Environment

    Guoliang Wang, Wei Peng, Dong Li, Tao Jiang, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 67 (8) 7181-7190 2018/08

    Publisher: Institute of Electrical and Electronics Engineers ({IEEE})

    DOI: 10.1109/TVT.2018.2828866  

  148. Decision-Feedback Prediction Channel Estimation for MIMO Cooperative Transmission

    Fumiyuki Adachi, Amnart Boonkajay

    IEEE Vehicular Technology Conference 2018- 1-5 2018/07/20

    DOI: 10.1109/VTCSpring.2018.8417556  

    ISSN: 1550-2252

  149. Selective MIMO Diversity with Subcarrier-wise UE Antenna Identification/Selection

    Fumiyuki Adachi, Amnart Boonkajay

    International Symposium on Wireless Personal Multimedia Communications, WPMC 2018- 25-30 2018/07/02

    DOI: 10.1109/WPMC.2018.8713082  

    ISSN: 1347-6890

  150. A Study on Dynamic Antenna Clustering for Distributed MIMO Cooperative Transmission using Multi-user MMSE-SVD

    Yuta Seki, Tomoyuki Saito, Fumiyuki Adachi

    International Symposium on Wireless Personal Multimedia Communications, WPMC 2018- 64-68 2018/07/02

    DOI: 10.1109/WPMC.2018.8712892  

    ISSN: 1347-6890

  151. Performance Comparison of MIMO Diversity Schemes in a Frequency-selective Rayleigh Fading Channel

    Fumiyuki Adachi, Amnart Bookajay, Tomoyuki Saito, Yuta Seki

    2018 IEEE International Conference on Communication Systems, ICCS 2018 62-66 2018/07/02

    DOI: 10.1109/ICCS.2018.8689252  

  152. A Low-Complexity Phase Rotation Estimation Using Fourth-Power Constellation for Blind SLM

    Amnart Boonkajay, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2018- 2018/07/02

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTCFall.2018.8690569  

    ISSN: 1550-2252

  153. Adaptive MMSE-SVD to Improve the Tracking Ability Against Fast Fading

    Yuta Seki, Amnart Boonkajay, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2018- 2018/07/02

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTCFall.2018.8690881  

    ISSN: 1550-2252

  154. Deep Learning for Super-Resolution DOA Estimation in Massive MIMO Systems

    Hongji Huang, Guan Gui, Hikmet Sari, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2018- 2018/07/02

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTCFall.2018.8691023  

    ISSN: 1550-2252

  155. Connectivity in Wireless Telecommunications

    Kazuo Tsubouchi, Fumiyuki Adachi, Suguru Kameda, Mizuki Motoyoshi, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Hiroshi Oguma, Minoru Fujishima, Ryuji Inagaki, Masaomi Tsuru, Eiji Taniguchi, Hiroshi Fukumoto, Akira Matsuzawa, Masaya Miyahara, Makoto Iwata, Fumihiro Yamagata, Noboru Izuka

    VLSI Design and Test for Systems Dependability 245-324 2018/07

    DOI: 10.1007/978-4-431-56594-9_7  

    More details Close

    © Springer Japan KK, part of Springer Nature 2019<br /> Good connection quality is a most important requirement in telecommunication systems. For the public wireless network, however, primary attention has so far been paid to providing broader bandwidth for rapidly expanding subscriber base. In this chapter, the connectivity of wireless telecommunication is undertaken as a central issue, while keeping in mind that the next-generation wireless will take on broader and ubiquitous machine-to-machine (M2M) applications, and that the communication traffic will be 1000 times heavier in 10 years. The reliability and dependability will be a must in future wireless communications. The devastation caused by the East Japan Earthquake in March 2011, when few people in the area could use mobile phones satisfactorily because of the significant damages in infrastructure, taught a lesson that the wireless connection has to be maintained even in time of emergency. In this chapter, we will discuss heterogeneous wireless network that is combination of multiple wireless systems, e.g., cellular phone system, Wi-Fi, and wireless personal area network (WPAN) for realizing high-connectivity wireless network. The technology base that we have developed to enables the dependable heterogeneous network will be discussed in detail. All Silicon complementary metal oxide semiconductor (CMOS) technology will be used for analog/radio frequency (RF) circuits and baseband technologies for carrier frequencies from 700 to 60 GHz. A novel frequency domain equalizer (FDE) implemented in an application-specific integrated circuit (ASIC) will be a key component for smooth system handover. A scalable, low-voltage, and adaptive analog-to-digital (A/D) converter will be discussed as well.

  156. A stream-wise blind selected mapping technique for low-PAPR multi-user MIMO transmission

    Amnart Boonkajay, Fumiyuki Adachi

    2017 IEEE/CIC International Conference on Communications in China, ICCC 2017 2018- 1-6 2018/04/02

    DOI: 10.1109/ICCChina.2017.8330507  

    ISSN: 2377-8644

  157. Power consumption analysis for user cooperation aided traffic forwarding over frequency selective fading channels Peer-reviewed

    Ou Zhao, Lin Shan, Katsuhiro Temma, Kiyohiko Hattori, Huan-Bang Li, Fumihide Kojima, Fumiyuki Adachi

    International Symposium on Wireless Personal Multimedia Communications, WPMC 2017- 487-493 2018/02/22

    DOI: 10.1109/WPMC.2017.8301862  

    ISSN: 1347-6890

  158. UAV Coverage for Downlink in Disasters: Precoding and Multi-hop D2D

    Xiaonan Liu, Guan Gui, Nan Zhao, Weixiao Meng, Zan Li, Yunfei Chen, Fumiyuki Adachi

    2018 IEEE/CIC INTERNATIONAL CONFERENCE ON COMMUNICATIONS IN CHINA (ICCC) 341-346 2018

    ISSN: 2377-8644

  159. Nonconvex is Attractive: L2/3 Regularized Thresholding Algorithm using Multiple Sub-Dictionaries

    Yunyi Li, Yue Hao, Fei Dai, Yue Yin, Shangang Fan, Jie Yang, Guan Gui, Fumiyuki Adachi

    2018 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 2018

    ISSN: 1550-3607

  160. Optimal Time Allocation in Relay Assisted Backscatter Communication Systems

    Bin Lyu, Zhen Yang, Tianyi Xie, Guan Gui, Fumiyuki Adachi

    2018 IEEE 87TH VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2018

  161. Adaptive MMSE-SVD to Improve the Tracking Ability Against Fast Fading

    Yuta Seki, Amnart Boonkajay, Fumiyuki Adachi

    2018 IEEE 88TH VEHICULAR TECHNOLOGY CONFERENCE (VTC-FALL) 2018

    ISSN: 2577-2465

  162. Deep Learning for Super-Resolution DOA Estimation in Massive MIMO Systems

    Hongji Huang, Guan Gui, Hikmet Sari, Fumiyuki Adachi

    2018 IEEE 88TH VEHICULAR TECHNOLOGY CONFERENCE (VTC-FALL) 2018

    ISSN: 2577-2465

  163. A Low-Complexity Phase Rotation Estimation using Fourth-Power Constellation for Blind SLM

    Amnart Boonkajay, Fumiyuki Adachi

    2018 IEEE 88TH VEHICULAR TECHNOLOGY CONFERENCE (VTC-FALL) 2018

    ISSN: 2577-2465

  164. Experimental Evaluation of Energy Efficiency for Virtual Small-Cell Networks using Smartphone Test-Bed

    Lin Shan, Ou Zhao, Katsuhiro Temma, Kiyohiko Hattori, Huan-Bang Li, Fumihide Kojima, Fumiyuki Adachi

    2017 23RD ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC): BRIDGING THE METROPOLITAN AND THE REMOTE 1-5 2017/12

    DOI: 10.23919/apcc.2017.8303985   10.1587/transcom.2017ebp3452_references_DOI_Xa8EUXp1INQm449pGl7hly4Pjmd  

    ISSN: 2163-0771

  165. Distributed ON/OFF switching and dynamic channel allocation: Decreasing complexity and improving energy efficiency Peer-reviewed

    Atefeh Hajijamali Arani, Abolfazl Mehbodniya, Mohammad Javad Omidi, Fumiyuki Adachi

    TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES 28 (12) 2017/12

    DOI: 10.1002/ett.3222  

    ISSN: 2161-3915

  166. A distributed learning-based user association for heterogeneous networks Peer-reviewed

    Atefeh Hajijamali Arani, Mohammad Javad Omidi, Abolfazl Mehbodniya, Fumiyuki Adachi

    TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES 28 (11) 2017/11

    DOI: 10.1002/ett.3192  

    ISSN: 2161-3915

  167. Distributed Learning for Energy-Efficient Resource Management in Self-Organizing Heterogeneous Networks Peer-reviewed

    Atefeh Hajijamali Arani, Abolfazl Mehbodniya, Mohammad Javad Omidi, Fumiyuki Adachi, Walid Saad, Ismail Guvenc

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 66 (10) 9287-9303 2017/10

    DOI: 10.1109/TVT.2017.2696974  

    ISSN: 0018-9545

    eISSN: 1939-9359

  168. Cooperative Distributed Antenna Transmission for 5G Mobile Communications Network Peer-reviewed

    Fumiyuki Adachi, Amnart Boonkajay, Yuta Seki, Tomoyuki Saito, Shinya Kumagai, Hiroyuki Miyazaki

    IEICE TRANSACTIONS ON COMMUNICATIONS E100B (8) 1190-1204 2017/08

    DOI: 10.1587/transcom.2016FGP0019  

    ISSN: 0916-8516

    eISSN: 1745-1345

  169. Guest Editorial: Ultra-Dense Heterogeneous Small Cell Deployment in 5G and Beyond

    Liu, J., Ansari, N., Adachi, F.

    IEEE Network 31 (4) 2017/07

    DOI: 10.1109/MNET.2017.7994887  

  170. Robust Widely Linear Beamforming via an IAA Method for the Augmented IPNCM Reconstruction Peer-reviewed

    Jiangbo Liu, Guan Gui, Wei Xie, Xunchao Cong, Qun Wan, Fumiyuki Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E100A (7) 1562-1566 2017/07

    DOI: 10.1587/transfun.E100.A.1562  

    ISSN: 1745-1337

  171. Sparsity Enhancement for Sparse Channel Estimation Using Non-orthogonal Basis Peer-reviewed

    Somayeh Mahmoodi, Mohammad Javad Omidi, Abolfazl Mehbodniya, Fumiyuki Adachi

    WIRELESS PERSONAL COMMUNICATIONS 95 (2) 1759-1779 2017/07

    DOI: 10.1007/s11277-016-3917-1  

    ISSN: 0929-6212

    eISSN: 1572-834X

  172. Fuzzy logic game-theoretic approach for energy efficient operation in HetNets

    Karthik Vasudeva, Sener Dikmese, Ismail Guvenc, Abolfazl Mehbodniya, Walid Saad, Fumiyuki Adachi

    2017 IEEE International Conference on Communications Workshops, ICC Workshops 2017 552-557 2017/06/29

    DOI: 10.1109/ICCW.2017.7962716  

    ISSN: 2164-7038

  173. Online Ski Rental for ON/OFF Scheduling of Energy Harvesting Base Stations Peer-reviewed

    Gilsoo Lee, Walid Saad, Mehdi Bennis, Abolfazl Mehbodniya, Fumiyuki Adachi

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 16 (5) 2976-2990 2017/05

    DOI: 10.1109/TWC.2017.2672964  

    ISSN: 1536-1276

    eISSN: 1558-2248

  174. Cooperative Distributed Antenna Transmissions

    Fumiyuki Adachi, Amnart Boonkajay, Yuta Seki, Tomoyuki Saito

    2017 IEEE 85TH VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2017

    ISSN: 2577-2465

  175. AoD-Adaptive Subspace Codebook for Channel Feedback in FDD Massive MIMO Systems

    Wenqian Shen, Linglong Dai, Guan Gui, Zhaocheng Wang, Robert W. Heath, Fumiyuki Adachi

    2017 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 2017

    ISSN: 1550-3607

  176. MIMO Channel Estimation for Time-Division Duplex Distributed Antenna Cooperative Transmission

    Fumiyuki Adachi, Amnart Boonkajay, Yuta Seki, Tomoyuki Saito

    2017 13TH INTERNATIONAL WIRELESS COMMUNICATIONS AND MOBILE COMPUTING CONFERENCE (IWCMC) 212-217 2017

    ISSN: 2376-6492

  177. 2-Step Phase Rotation Estimation for Low-PAPR Signal Transmission using Blind Selected Mapping

    Amnart Boonkajay, Fumiyuki Adachi

    2017 IEEE 28TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC) 2017

    DOI: 10.1109/PIMRC.2017.8292290  

  178. Convergence analysis of interference-aware channel segregation

    Temma Katsuhiro, Adachi Fumiyuki, Shan Lin, Owada Yasunori, Hattori Kiyohiko, Hamaguchi Kiyoshi

    IEICE Communications Express 6 (7) 460-466 2017

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI: 10.1587/comex.2017xbl0051   10.1587/transcom.2020fgp0010_references_DOI_D06jXIXnWgvekndieiOYCe1oNGN  

    eISSN: 2187-0136

    More details Close

    Our recently proposed interference-aware channel segregation based dynamic channel assignment (IACS-DCA) forms a channel reuse pattern with low co-channel interference (CCI) in a distributed manner. It has been shown by numerical computation that IACS-DCA forms a stable channel reuse pattern. In this paper, we provide convergence analysis of IACS-DCA. The existence of convergent point of channel reuse pattern and the convergence performance of IACS-DCA are discussed.

  179. Sparse adaptive iteratively-weighted thresholding algorithm (SAITA) for L<inf>p</inf>-regularization using the multiple sub-dictionary representation

    Li, Y., Zhang, J., Fan, S., Yang, J., Xiong, J., Cheng, X., Sari, H., Adachi, F., Gui, G.

    Sensors (Switzerland) 17 (12) 2017

    DOI: 10.3390/s17122920  

  180. Fuzzy-Based Game Theoretic Mobility Management for Energy Efficient Operation in HetNets Peer-reviewed

    Karthik Vasudeva, Sener Dikmese, Ismail Guven, Abolfazl Mehbodniya, Walid Saad, Fumiyuki Adachi

    IEEE ACCESS 5 7542-7552 2017

    DOI: 10.1109/ACCESS.2017.2689061  

    ISSN: 2169-3536

  181. Minimizing Base Stations' ON/OFF Switchings in Self-Organizing Heterogeneous Networks: A Distributed Satisfactory Framework Peer-reviewed

    Atefeh Hajijamali Arani, Mohammad Javad Omidi, Abolfazl Mehbodniya, Fumiyuki Adachi

    IEEE ACCESS 5 26267-26278 2017

    DOI: 10.1109/ACCESS.2017.2777914  

    ISSN: 2169-3536

  182. A blind polyphase time-domain selected mapping for filtered single-carrier signal transmission

    Amnart Boonkajay, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2016/07/02

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTCFall.2016.7880845  

    ISSN: 1550-2252

  183. Distributed antenna selection for OFDM space-time block coded diversity

    Hiroyuki Miyazaki, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2016/07/02

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTCFall.2016.7880961  

    ISSN: 1550-2252

  184. A Simple Divergence Prevention Scheme for Adaptive Equalizer in Digital Power Line Carrier Systems Peer-reviewed

    Norio Sasaki, Tasuku Hanaumi, Takeshi Oda, Fumiyuki Adachi

    IEEJ Transactions on Electronics, Information and Systems 136 (7) 1027-1028 2016/07

    Publisher: Institute of Electrical Engineers of Japan (IEE Japan)

    DOI: 10.1541/ieejeiss.136.1027  

    ISSN: 0385-4221

    eISSN: 1348-8155

  185. Correntropy Induced Metric Penalized Sparse RLS Algorithm to Improve Adaptive System Identification Peer-reviewed

    G. Gui, L. Dai, B. Zheng, Li Xu, F. Adachi

    IEEE VTC 2016-Spring, Nanjing, China 2016/05

    DOI: 10.1109/VTCSpring.2016.7504179  

    ISSN: 1550-2252

  186. Frequency-Domain Equalization for Single-Carrier Space-Time Block Coded Transmit Diversity in a High Mobility Environment Peer-reviewed

    Hiroyuki Miyazaki, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E99B (5) 1180-1188 2016/05

    DOI: 10.1587/transcom.2015EBP3230  

    ISSN: 0916-8516

    eISSN: 1745-1345

  187. Sojourn Time-Based Velocity Estimation in Small Cell Poisson Networks Peer-reviewed

    Arvind Merwaday, Ismail Guevenc, Walid Saad, Abolfazl Mehbodniya, Fumiyuki Adachi

    IEEE COMMUNICATIONS LETTERS 20 (2) 340-343 2016/02

    DOI: 10.1109/LCOMM.2015.2501822  

    ISSN: 1089-7798

    eISSN: 1558-2558

  188. Single-Carrier Multi-User MIMO Downlink with Time-Domain Tomlinson-Harashima Precoding Peer-reviewed

    Shohei Yoshioka, Shinya Kumagai, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E99B (2) 471-480 2016/02

    DOI: 10.1587/transcom.2015EBT0001  

    ISSN: 0916-8516

    eISSN: 1745-1345

  189. A Blind Polyphase Time-Domain Selected Mapping for Filtered Single-Carrier Signal Transmission

    Amnart Boonkajay, Fumiyuki Adachi

    2016 IEEE 84TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2016

    ISSN: 2577-2465

  190. Distributed Antenna Selection for OFDM Space-Time Block Coded Diversity

    Hiroyuki Miyazaki, Fumiyuki Adachi

    2016 IEEE 84TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2016

    ISSN: 2577-2465

  191. Selected mapping technique for reducing PAPR of single-carrier signals

    Boonkajay, A., Adachi, F.

    Wireless Communications and Mobile Computing 16 (16) 2016

    DOI: 10.1002/wcm.2701  

  192. Joint Tx/Rx Signal Processing for Distributed Antenna MU-MIMO Downlink Peer-reviewed

    Shinya Kumagai, Yuta Seki, Fumiyuki Adachi

    2016 IEEE 84TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2016

    ISSN: 1550-2252

  193. Online Channel Allocation for Full-Duplex Device-to-Device Communications Peer-reviewed

    Gilsoo Lee, Walid Saad, Mehdi Bennis, Abolfazl Mehbodniya, Fumiyuki Adachi

    2016 IEEE GLOBECOM WORKSHOPS (GC WKSHPS) 2016

    ISSN: 2166-0069

  194. Wireless Network Evolution Toward 5G Network Peer-reviewed

    Fumiyuki Adachi

    2016 21ST OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) HELD JOINTLY WITH 2016 INTERNATIONAL CONFERENCE ON PHOTONICS IN SWITCHING (PS) 2016

  195. Online Ski Rental for Scheduling Self-Powered, Energy Harvesting Small Base Stations Peer-reviewed

    Gilsoo Lee, Walid Saad, Mehdi Bennis, Abolfazl Mehbodniya, Fumiyuki Adachi

    2016 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 2016

    DOI: 10.1109/ICC.2016.7511011  

    ISSN: 1550-3607

  196. Distributed Load Balancing User Association and Self-Organizing Resource Allocation in HetNets Peer-reviewed

    Atefeh Hajijamali Arani, Abolfazl Mehbodniya, Mohammad Javad Omidi, Fumiyuki Adachi

    2016 IEEE 84TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2016

    ISSN: 1550-2252

  197. Joint Tx/Rx MMSE Filtering for Single-Carrier MIMO Eigenmode Transmission Using Iterative Interference Cancellation Peer-reviewed

    Shinya Kumagai, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E99B (1) 192-201 2016/01

    DOI: 10.1587/transcom.2015EBP3136  

    ISSN: 0916-8516

    eISSN: 1745-1345

  198. The Application of MIMO to Non-Orthogonal Multiple Access Peer-reviewed

    Zhiguo Ding, Fumiyuki Adachi, H. Vincent Poor

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 15 (1) 537-552 2016/01

    DOI: 10.1109/TWC.2015.2475746  

    ISSN: 1536-1276

    eISSN: 1558-2248

  199. Low-complexity large-scale multiple-input multiple-output channel estimation using affine combination of sparse least mean square filters Peer-reviewed

    Gui, G., Liu, N., Xu, L., Adachi, F.

    IET Communications 9 (17) 2168-2175 2015/12

    DOI: 10.1049/iet-com.2014.0979  

  200. A Matching Pursuit Generalized Approximate Message Passing Algorithm Peer-reviewed

    Yongjie Luo, Qun Wan, Guan Gui, Fumiyuki Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E98A (12) 2723-2727 2015/12

    DOI: 10.1587/transfun.E98.A.2723  

    ISSN: 1745-1337

  201. A Reduced-Complexity Near-ML Detection for Broadband Single-Carrier Transmission Peer-reviewed

    Katsuhiro Temma, Fumiyuki Adachi

    IEICE Communications Express 4 (12) 363-369 2015/12

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI: 10.1587/comex.2015XBL0140  

    ISSN: 2187-0136

    More details Close

    In our recently proposed reduced-complexity near-maximum likelihood block signal detection employing QR decomposition and M-algorithm (QRM-MLBD) for broadband single-carrier (SC) block transmission, unreliable symbol candidates are removed from the symbol tree based on the hard-decision minimum mean square error based frequency-domain equalization (MMSE-FDE). In this paper, to further remove the unreliable symbol candidates and consequently reduce the computational complexity, we introduce a soft-decision MMSE-FDE based selection of reliable symbol candidates into reduced-complexity QRM-MLBD. It is shown that the soft-decision MMSE-FDE based selection significantly reduces the computational complexity while achieving a bit error rate (BER) performance similar to the original QRM-MLBD.

  202. Carrier frequency offset compensation method for digital power line carrier systems Peer-reviewed

    Norio Sasaki, Tasuku Hanaumi, Takeshi Oda, Fumiyuki Adachi

    IEEJ Transactions on Electronics, Information and Systems 135 (11) 1351-1360 2015/11/01

    Publisher: Institute of Electrical Engineers of Japan

    DOI: 10.1541/ieejeiss.135.1351  

    ISSN: 1348-8155 0385-4221

    eISSN: 1348-8155

  203. Transmit Multi-Block FDE for Space-Time Block Coded Joint Transmit/Receive Diversity in a Quasi-Static Fading Channel Peer-reviewed

    Hiroyuki Miyazaki, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E98B (10) 2068-2078 2015/10

    DOI: 10.1587/transcom.E98.B.2068  

    ISSN: 1745-1345

  204. Spectrum Efficiency Analysis and Adaptive Transceiver Design for Single-Carrier Multiuser Transmission Peer-reviewed

    Wei Peng, Fumiyuki Adachi, Xiaodong Wang, Tao Jiang

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 64 (8) 3566-3577 2015/08

    DOI: 10.1109/TVT.2014.2360850  

    ISSN: 0018-9545

    eISSN: 1939-9359

  205. Sparse LMS/F algorithms with application to adaptive system identification Peer-reviewed

    Guan Gui, Abolfazl Mehbodniya, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 15 (12) 1649-1658 2015/08

    DOI: 10.1002/wcm.2453  

    ISSN: 1530-8669

    eISSN: 1530-8677

  206. Pseudo block coded single-carrier transmission using frequency-domain block signal detection

    Hiroyuki Miyazaki, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2015 2015/07/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTCSpring.2015.7146035  

    ISSN: 1550-2252

  207. Spectrum efficient single-sideband single-carrier with frequency-domain equalization

    Kohei Abo, Thanh Hai Vo, Amnart Boonkajay, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2015 2015/07/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VTCSpring.2015.7146100  

    ISSN: 1550-2252

  208. Centralized Inter-Cell Interference Coordination Using Multi-Band 3D Beam-Switching in Cellular Networks Peer-reviewed

    Hiroyuki Seki, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E98B (7) 1363-1372 2015/07

    DOI: 10.1587/transcom.E98.B.1363  

    ISSN: 1745-1345

  209. Analog SC-FDE using SSB technique Peer-reviewed

    Than Hai Vo, Shinya Kumagai, Fumiyuki Adachi

    IEICE Communications Express 4 (6) 173-179 2015/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI: 10.1587/comex.4.173  

    ISSN: 2187-0136

    More details Close

    In order to improve performance while keeping high spectrum efficiency of analog signal transmission, we recently proposed an analog single-carrier transmission with frequency-domain equalization (analog SC-FDE). In this paper, in order to improve the spectrum efficiency, analog SC-FDE using single sideband (SSB) technique is proposed. A theoretical analysis of normalized mean square error (NMSE) performance is carried out and confirmed by computer simulation. We show that analog SC-FDE using SSB technique achieves better NMSE performance than both conventional SSB transmission and analog SC-FDE while doubling spectrum efficiency of analog SC-FDE.

  210. Decentralized Energy Allocation for Wireless Networks With Renewable Energy Powered Base Stations Peer-reviewed

    Dapeng Li, Walid Saad, Ismail Guvenc, Abolfazl Mehbodniya, Fumiyuki Adachi

    IEEE TRANSACTIONS ON COMMUNICATIONS 63 (6) 2126-2142 2015/06

    DOI: 10.1109/TCOMM.2015.2424242  

    ISSN: 0090-6778

    eISSN: 1558-0857

  211. Interference-Aware Channel Segregation Based Dynamic Channel Assignment for Wireless Networks Peer-reviewed

    Yuki Matsumura, Katsuhiro Temma, Ren Sugai, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E98B (5) 854-860 2015/05

    DOI: 10.1587/transcom.E98.B.854  

    ISSN: 1745-1345

  212. Low-PAPR joint transmit/received SC-FDE transmission using time-domain selected mapping

    Amnart Boonkajay, Fumiyuki Adachi

    Proceedings of the 20th Asia-Pacific Conference on Communication, APCC 2014 248-253 2015/04/22

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/APCC.2014.7091642  

  213. Excess-Bandwidth Transmit Filtering Based on Minimization of Variance of Instantaneous Transmit Power for Low-PAPR SC-FDE Peer-reviewed

    Amnart Boonkajay, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E98B (4) 673-685 2015/04

    DOI: 10.1587/transcom.E98.B.673  

    ISSN: 0916-8516

    eISSN: 1745-1345

  214. Normalized least mean square-based adaptive sparse filtering algorithms for estimating multiple-input multiple-output channels Peer-reviewed

    Guan Gui, Li Xu, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 15 (6) 1079-1088 2015/04

    DOI: 10.1002/wcm.2511  

    ISSN: 1530-8669

    eISSN: 1530-8677

  215. Sub-Nyquist rate ADC sampling-based compressive channel estimation Peer-reviewed

    Guan Gui, Wei Peng, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 15 (4) 639-648 2015/03

    DOI: 10.1002/wcm.2372  

    ISSN: 1530-8669

    eISSN: 1530-8677

  216. Efficient multihop transmission scheme for error-free relay forwarding in cooperative networks Peer-reviewed

    Ashish James, A. S. Madhukumar, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 15 (4) 755-769 2015/03

    DOI: 10.1002/wcm.2381  

    ISSN: 1530-8669

    eISSN: 1530-8677

  217. Adaptive two-dimension MIMO channel estimation for single-carrier STBC time-division duplex transmission

    Hiroyuki Miyazaki, Fumiyuki Adachi

    International Symposium on Wireless Personal Multimedia Communications, WPMC 2015- 672-677 2015/01/19

    DOI: 10.1109/WPMC.2014.7014901  

    ISSN: 1347-6890

  218. STBC AF Relay for Unmanned Aircraft Systems

    Fumiyuki Adachi, Hiroyuki Miyazaki, Chikara Endo

    BROADBAND ACCESS COMMUNICATION TECHNOLOGIES IX 9387 2015

    DOI: 10.1117/12.2084979  

    ISSN: 0277-786X

    eISSN: 1996-756X

  219. Capacity-and-Energy Efficient Resource Allocation for Emergency Communications

    Cheng Guo, Liqiang Zhao, Guowei Fan, Kai Liang, Fumiyuki Adachi

    2015 IEEE 81ST VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2015

    ISSN: 2577-2465

  220. Pseudo Block Coded Single-Carrier Transmission Using Frequency-Domain Block Signal Detection

    Hiroyuki Miyazaki, Fumiyuki Adachi

    2015 IEEE 81ST VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2015

    ISSN: 2577-2465

  221. Spectrum Efficient Single-Sideband Single-Carrier with Frequency-Domain Equalization

    Kohei Abo, Thanh Hai Vo, Amnart Boonkajay, Fumiyuki Adachi

    2015 IEEE 81ST VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2015

    ISSN: 2577-2465

  222. Competitive Cell Association and Antenna Allocation in 5G Massive MIMO Networks

    Dusit Niyato, Fumiyuki Adachi, Ping Wang, Dong In Kim

    2015 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 3867-3872 2015

    ISSN: 1550-3607

  223. A Blind Selected Mapping Technique for Low-PAPR Single-Carrier Signal Transmission

    Amnart Boonkajay, Fumiyuki Adachi

    2015 10TH INTERNATIONAL CONFERENCE ON INFORMATION, COMMUNICATIONS AND SIGNAL PROCESSING (ICICS) 2015

  224. Performance of MIMO-NOMA downlink transmissions

    Zhiguo Ding, Fumiyuki Adachi, H. Vincent Poor

    2015 IEEE Global Communications Conference, GLOBECOM 2015 2015

    DOI: 10.1109/GLOCOM.2014.7417060  

    ISSN: 2334-0983

  225. Transmit power efficiency of multi-hop hybrid selection/MRC diversity for a DS-CDMA virtual cellular network Peer-reviewed

    Imane Daou, Eisuke Kudoh, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2 1383-1387 2015

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VETECF.2005.1558154  

    ISSN: 1550-2252

  226. A Handoff Algorithm Based on Estimated Load for Dense Green 5G Networks Peer-reviewed

    Atefeh Hajijamali Arani, Mohammad Javad Omidi, Abolfazl Mehbodniya, Fumiyuki Adachi

    2015 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM) 2015

    DOI: 10.1109/GLOCOM.2015.7417634  

    ISSN: 2334-0983

  227. Energy-Efficient radio Resource Management for Next Generation Dense HetNet Peer-reviewed

    Abolfazl Mehbodniya, Walid Saad, Fumiyuki Adachi, Rintaro Yoneya, Ismail Guvenc

    2015 5TH INTERNATIONAL CONFERENCE ON ENERGY AWARE COMPUTING SYSTEMS & APPLICATIONS (ICEAC) 2015

  228. Joint Tx/Rx Signal Processing for Uplink Distributed Antenna Network using Single-Carrier MU-MIMO Peer-reviewed

    Shinya Kumagai, Shohei Yoshioka, Fumiyuki Adachi

    2015 10TH INTERNATIONAL CONFERENCE ON INFORMATION, COMMUNICATIONS AND SIGNAL PROCESSING (ICICS) 2015

  229. Structured Matching Pursuit for Reconstruction of Dynamic Sparse Channels Peer-reviewed

    Xudong Zhu, Linglong Dai, Guan Gui, Wei Dai, Zhaocheng Wang, Fumiyuki Adachi

    2015 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM) 2015

    DOI: 10.1109/GLOCOM.2015.7416980  

    ISSN: 2334-0983

  230. Subcarrier Combining for An Analog Single-Carrier Transmission Peer-reviewed

    Thanh Hai Vo, Shinya Kumagai, Fumiyuki Adachi

    2015 IEEE 82ND VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2015

  231. Energy-Efficient Dynamic Spectrum Access in Wireless Heterogeneous Networks Peer-reviewed

    Abolfazl Mehbodniya, Katsuhiro Temma, Ren Sugai, Walid Saad, Ismail Guvenc, Fumiyuki Adachi

    2015 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATION WORKSHOP (ICCW) 2775-2780 2015

    ISSN: 2164-7038

  232. Joint Machine-Type Device Selection and Power Allocation for Buffer-Aided Cognitive M2M Communication Peer-reviewed

    Mostafa Darabi, Behrouz Maham, Walid Saad, Abolfazl Mehbodniya, Fumiyuki Adachi

    2015 IEEE 26TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC) 2288-2292 2015

    ISSN: 2166-9570

  233. Interference-Aware Channel Segregation for HetNet Using Time- and Frequency-Division Channels Peer-reviewed

    Ren Sugai, Katsuhiro Temma, Abolfazl Mehbodniya, Fumiyuki Adachi

    2015 IEEE INTERNATIONAL SYMPOSIUM ON DYNAMIC SPECTRUM ACCESS NETWORKS (DYSPAN) 114 (490(RCS2014 301-372)) 289-292 2015

    ISSN: 0913-5685

  234. Context Aware Medium Access Control for Buffer-Aided Multichannel Cognitive Networks Peer-reviewed

    Mostafa Darabi, Behrouz Maham, Walid Saad, Abolfazl Mehbodniya, Fumiyuki Adachi

    2015 IEEE GLOBECOM WORKSHOPS (GC WKSHPS) 2015

    ISSN: 2166-0069

  235. Joint Tomlinson-Harashima Precoding and Transmit Equalization in Time-Domain for Single-Carrier MU-MIMO Block Transmission Peer-reviewed

    Shohei Yoshioka, Shinya Kumagai, Fumiyuki Adachi

    2015 IEEE 81ST VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2015

    ISSN: 1550-2252

  236. Two Novel Handover Algorithms with Load Balancing for Heterogeneous Network Peer-reviewed

    Rintaro Yoneya, Abolfazl Mehbodniya, Fumiyuki Adachi

    2015 IEEE 82ND VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2015

  237. Adaptive sparse system identification using normalized least mean fourth algorithm Peer-reviewed

    Guan Gui, Fumiyiuki Adachi

    INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 28 (1) 38-48 2015/01

    DOI: 10.1002/dac.2637  

    ISSN: 1074-5351

    eISSN: 1099-1131

  238. Frequency-domain iterative MUI cancellation for duobinary partial response filtered SC-FDMA uplink

    Kohei Abo, Amnart Boonkajay, Fumiyuki Adachi

    Proceedings of 2014 4th IEEE International Conference on Network Infrastructure and Digital Content, IEEE IC-NIDC 2014 306-311 2014/12/30

    DOI: 10.1109/ICNIDC.2014.7000315  

    ISSN: 2374-0272

  239. Pseudo block coded single-carrier frequency-domain equalization transmission

    Hiroyuki Miyazaki, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2014/11/24

    DOI: 10.1109/VTCFall.2014.6966139  

    ISSN: 1550-2252

  240. Adaptive MIMO channel estimation using sparse variable step-size NLMS algorithms Peer-reviewed

    G. Gui, Li Xu, L. Shan, F. Adachi

    IEEE International Conference on Communication Systems (ICCS), Macau, China 605-609 2014/11

    DOI: 10.1109/ICCS.2014.7024874  

  241. Suitable is the best: Least absolute derivation algorithm under high-mobility non-Gaussian noise environments Peer-reviewed

    G. Gui, Li Xu, F. Adachi

    International Workshop on High Mobility Wireless Communications (HMWC), Beijing, China 27-32 2014/11

    DOI: 10.1109/HMWC.2014.7000208  

    ISSN: 2469-5564

  242. Adaptive system identification using robust LMS/F algorithm Peer-reviewed

    Guan Gui, Wei Peng, Fumiyuki Adachi

    INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 27 (11) 2956-2963 2014/11

    DOI: 10.1002/dac.2517  

    ISSN: 1074-5351

    eISSN: 1099-1131

  243. Sparse least mean fourth algorithm for adaptive channel estimation in low signal-to-noise ratio region Peer-reviewed

    Guan Gui, Fumiyuki Adachi

    INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 27 (11) 3147-3157 2014/11

    DOI: 10.1002/dac.2531  

    ISSN: 1074-5351

    eISSN: 1099-1131

  244. Variable-step-size based sparse adaptive filtering algorithm for channel estimation in broadband wireless communication systems Peer-reviewed

    Guan Gui, Wei Peng, Li Xu, Beiyi Liu, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2014 2014/11

    DOI: 10.1186/1687-1499-2014-195  

    ISSN: 1687-1499

  245. Extra Gain: Improved sparse channel estimation using reweighted l1-norm penalized LMS/F algorithm Peer-reviewed

    G. Gui, Li Xu, F. Adachi

    3rd IEEE/CIC International Conference on Communications in China (ICCC), Shanghai, China 370-374 2014/10

    DOI: 10.1109/ICCChina.2014.7008304  

    ISSN: 2377-8644

  246. High-resolution compressive channel estimation for broadband wireless communication systems Peer-reviewed

    Guan Gui, Wei Peng, Fumiyuki Adachi

    INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 27 (10) 2396-2407 2014/10

    DOI: 10.1002/dac.2483  

    ISSN: 1074-5351

    eISSN: 1099-1131

  247. Robust frequency-domain equalization against doubly selective fading for single-carrier STBC time-division duplex transmission

    Hiroyuki Miyazaki, Fumiyuki Adachi

    IWCMC 2014 - 10th International Wireless Communications and Mobile Computing Conference 405-410 2014/09/22

    DOI: 10.1109/IWCMC.2014.6906391  

    ISSN: 2376-6492

  248. Capacity of distributed antenna network by using single-carrier frequency domain adaptive antenna array Peer-reviewed

    Wei Peng, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 14 (13) 1244-1251 2014/09

    DOI: 10.1002/wcm.2223  

    ISSN: 1530-8669

    eISSN: 1530-8677

  249. Analog Single-Carrier Transmission with Frequency-Domain Equalization Peer-reviewed

    Thanh Hai Vo, Shinya Kumagai, Tatsunori Obara, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E97B (9) 1958-1966 2014/09

    DOI: 10.1587/transcom.E97.B.1958  

    ISSN: 1745-1345

  250. Joint Tx/Rx MMSE Filtering for Single-Carrier MIMO Transmission Peer-reviewed

    Shinya Kumagai, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E97B (9) 1967-1976 2014/09

    DOI: 10.1587/transcom.E97.B.1967  

    ISSN: 1745-1345

  251. Combined code reuse scheme with two-dimensional OVSF codes assignment algorithm for uplink multi-user/multi-rate block spread multi-cellular CDMA Peer-reviewed

    Qiyue Yu, Weixiao Meng, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 14 (13) 1314-1328 2014/09

    DOI: 10.1002/wcm.2245  

    ISSN: 1530-8669

    eISSN: 1530-8677

  252. RZA-NLMF algorithm-based adaptive sparse sensing for realizing compressive sensing Peer-reviewed

    Guan Gui, Li Xu, Fumiyuki Adachi

    EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING 2014 2014/08

    DOI: 10.1186/1687-6180-2014-125  

    ISSN: 1687-6180

  253. Channel Modeling for Digital Transmission Using Power Line Peer-reviewed

    Norio Sasaki, Kenichi Seino, Tasuku Hanaumi, Takeshi Oda, Fumiyuki Adachi

    ELECTRONICS AND COMMUNICATIONS IN JAPAN 97 (7) 17-30 2014/07

    DOI: 10.1002/ecj.11544  

    ISSN: 1942-9533

    eISSN: 1942-9541

  254. Capacity-Fairness Controllable Scheduling Algorithms for Single-Carrier FDMA Peer-reviewed

    Takayoshi Iwata, Hiroyuki Miyazaki, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E97B (7) 1474-1482 2014/07

    DOI: 10.1587/transcom.E97.B.1474  

    ISSN: 1745-1345

  255. Stable adaptive sparse filtering algorithms for estimating multiple-input-multiple-output channels Peer-reviewed

    Guan Gui, Fumiyuki Adachi

    IET COMMUNICATIONS 8 (7) 1032-1040 2014/05

    DOI: 10.1049/iet-com.2013.0665  

    ISSN: 1751-8628

    eISSN: 1751-8636

  256. STBC decode-and-forward OFDM relay for unmmaned aircraft system

    Fumiyuki Adachi, Hiroyuki Miyazaki

    2014 Asia-Pacific Microwave Conference Proceedings, APMC 2014 654-656 2014/03/25

  257. Iterative Overlap QRM-ML Block Detection for Single-Carrier MIMO Transmission Without CP Insertion Peer-reviewed

    Hideyuki Moroga, Tetsuya Yamamoto, Fumiyuki Adachi

    WIRELESS PERSONAL COMMUNICATIONS 74 (4) 1163-1177 2014/02

    DOI: 10.1007/s11277-013-1570-5  

    ISSN: 0929-6212

    eISSN: 1572-834X

  258. Training Sequence Inserted OFDM Transmission with MMSE-FDE Peer-reviewed

    Tetsuya Yamamoto, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E97B (2) 476-483 2014/02

    DOI: 10.1587/transcom.E97.B.476  

    ISSN: 0916-8516

    eISSN: 1745-1345

  259. Signal-Carrier Cooperative DF Relay Using Adaptive Modulation Peer-reviewed

    Kazuhiro Kimura, Hiroyuki Miyazaki, Tatsunori Obara, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E97B (2) 387-395 2014/02

    DOI: 10.1587/transcom.E97.B.387  

    ISSN: 0916-8516

    eISSN: 1745-1345

  260. Frequency-Domain based Single-Carrier Waveform Design through Precoder

    Fumiyuki Adachi, Amnart Boonkajay

    2014 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS (ICCS) 207-211 2014

  261. Performance Analysis of Space-Time Block Coded Joint Tx/Rx Diversity Using Optimal Transmit FDE in Presence of Channel Estimation Error

    Hiroyuki Miyazaki, Fumiyuki Adachi

    2014 IEEE 79TH VEHICULAR TECHNOLOGY CONFERENCE (VTC-SPRING) 2014

    ISSN: 2577-2465

  262. Compressive Sensing Based Bayesian Sparse Channel Estimation for OFDM Communication Systems: High Performance and Low Complexity

    Guan Gui, Li Xu, Lin Shan, Fumiyuki Adachi

    The Scientific World Journal 2014 1-10 2014

    Publisher: Hindawi Limited

    DOI: 10.1155/2014/927894   10.48550/arxiv.1403.0192  

    ISSN: 2356-6140

    eISSN: 1537-744X

    More details Close

    <jats:p>In orthogonal frequency division modulation (OFDM) communication systems, channel state information (CSI) is required at receiver due to the fact that frequency-selective fading channel leads to disgusting intersymbol interference (ISI) over data transmission. Broadband channel model is often described by very few dominant channel taps and they can be probed by compressive sensing based sparse channel estimation (SCE) methods, for example, orthogonal matching pursuit algorithm, which can take the advantage of sparse structure effectively in the channel as for prior information. However, these developed methods are vulnerable to both noise interference and column coherence of training signal matrix. In other words, the primary objective of these conventional methods is to catch the dominant channel taps without a report of posterior channel uncertainty. To improve the estimation performance, we proposed a compressive sensing based Bayesian sparse channel estimation (BSCE) method which cannot only exploit the channel sparsity but also mitigate the unexpected channel uncertainty without scarifying any computational complexity. The proposed method can reveal potential ambiguity among multiple channel estimators that are ambiguous due to observation noise or correlation interference among columns in the training matrix. Computer simulations show that proposed method can improve the estimation performance when comparing with conventional SCE methods.</jats:p>

  263. Smart-device-to-smart-device communications: Part I

    Mumtaz, S., Yang, L.-L., Wang, C., Adachi, F., Ali, N.

    IEEE Communications Magazine 52 (4) 2014

    DOI: 10.1109/MCOM.2014.6807942  

  264. Smart-device-to-smart-device communications: Part 2 [Guest Editorial]

    Mumtaz, S., Yang, L.-L., Wang, C., Adachi, F., Ali, N.

    IEEE Communications Magazine 52 (6) 2014

    DOI: 10.1109/MCOM.2014.6829949  

  265. Guest editorialspecial section on green mobile multimedia communications

    Qian, Y., Chu, X., Wang, X., Lin, H., Adachi, F., Mouftah, H.T.

    IEEE Transactions on Vehicular Technology 63 (5) 2014

    DOI: 10.1109/TVT.2014.2314522  

  266. Two are Better Than One: Adaptive Sparse System Identification using Affine Combination of Two Sparse Adaptive Filters Peer-reviewed

    Guan Gui, Shinya Kumagai, Abolfazl Mehbodniya, Fumiyuki Adachi

    2014 IEEE 79TH VEHICULAR TECHNOLOGY CONFERENCE (VTC-SPRING) 2014

    ISSN: 1550-2252

  267. A Novel Analog Signal Transmission using Joint Space-Time Transmit Diversity and Receive Antenna Diversity Peer-reviewed

    Thanh Hai Vo, Shinya Kumagai, Fumiyuki Adachi

    2014 IEEE 80TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2014

  268. MULTI-GROUP INTERFERENCE-AWARE CHANNEL SEGREGATION BASED DYNAMIC CHANNEL ASSIGNMENT Peer-reviewed

    Katsuhiro Temma, Fumiyuki Adachi

    2014 4th IEEE International Conference on Network Infrastructure and Digital Content (IEEE IC-NIDC) 51-55 2014

    ISSN: 2374-0272

  269. Reliable and Energy-Efficient OFDM Based on Structured Compressive Sensing Peer-reviewed

    Linglong Dai, Zhaocheng Wang, Zhixing Yang, Guan Gui, Fumiyuki Adachi

    2014 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 3963-3968 2014

    ISSN: 1550-3607

  270. Complexity-reduced Per-Antenna Multiple Access Interference Cancellation for DAN Using DS-CDMA Peer-reviewed

    Shohei Inoshita, Hiroyuki Miyazaki, Fumiyuki Adachi

    2014 IEEE 80TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2014

  271. Joint Iterative Tx/Rx MMSE Filtering & Interference Cancellation for SC-MIMO Spatial Multiplexing Peer-reviewed

    Shinya Kumagai, Fumiyuki Adachi

    2014 IEEE/CIC INTERNATIONAL CONFERENCE ON COMMUNICATIONS IN CHINA (ICCC) 1-5 2014

    DOI: 10.1109/iccchina.2014.7008232  

    ISSN: 2377-8644

  272. Distributed Antenna Tx/Rx Diversity Using Sparse Channel Estimation in Doubly Selective Nakagami-Rice Fading Channel Peer-reviewed

    Jimmy Hadi Susanto, Hiroyuki Miyazaki, Katsuhiro Temma, Fumiyuki Adachi

    2014 IEEE 80TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2014

  273. Vector Perturbation for Single-Carrier MU-MIMO Downlink Peer-reviewed

    Shohei Yoshioka, Shinya Kumagai, Fumiyuki Adachi

    2014 IEEE International Conference on Communication Systems (ICCS) 507-511 2014

  274. A Tunable Multiuser Grouping and Chunk Allocation Algorithm for Controlling Fairness-Capacity Tradeoff in SC-FDMA/SDMA Transmission Peer-reviewed

    Abolfazl Mehbodniya, Takayoshi Iwata, Fumiyuki Adachi

    2014 IEEE 79TH VEHICULAR TECHNOLOGY CONFERENCE (VTC-SPRING) 2014

    ISSN: 1550-2252

  275. Toward Frequency- and Energy-efficient High Mobility Wireless Peer-reviewed

    Fumiyuki Adachi

    2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS) 1-4 2014

    DOI: 10.1109/ursigass.2014.6929494  

  276. Space-Time Block Coded Amplify-and-Forward Cooperative Relay Without Channel State Information At Relay Station Peer-reviewed

    Chikara Endo, Hiroyuki Miyazaki, Fumiyuki Adachi

    2014 INTERNATIONAL SYMPOSIUM ON WIRELESS PERSONAL MULTIMEDIA COMMUNICATIONS (WPMC) 641-645 2014

    ISSN: 1347-6890

  277. An Adaptive Multiuser Scheduling and Chunk Allocation Algorithm for Uplink SIMO SC-FDMA Peer-reviewed

    Abolfazl Mehbodniya, Wei Peng, Fumiyuki Adachi

    2014 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 2861-2866 2014

    ISSN: 1550-3607

  278. Wireless Optical Convergence Enables Spectrum-Energy Efficient Wireless Networks Peer-reviewed

    Fumiyuki Adachi

    2014 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) AND THE 2014 9TH ASIA-PACIFIC MICROWAVE PHOTONICS CONFERENCE (APMP) 3-8 2014

  279. Variable Earns Profit: Improved Adaptive Channel Estimation Using Sparse VSS-NLMS Algorithms Peer-reviewed

    Guan Gui, Linglong Dai, Shinya Kumagai, Fumiyuki Adachi

    2014 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 4390-4394 2014

    ISSN: 1550-3607

  280. Analog SC-FDE using Single Sideband Technique Peer-reviewed

    Thanh Hai Vo, Shinya Kumagai, Fumiyuki Adachi

    2014 INTERNATIONAL CONFERENCE ON ADVANCED TECHNOLOGIES FOR COMMUNICATIONS (ATC) 344-348 2014

    ISSN: 2162-1020

  281. AP Cooperative Diversity in Wireless Network Using Interference-Aware Channel Segregation Based Dynamic Channel Assignment Peer-reviewed

    Martin T. H. Sirait, Yuki Matsumura, Katsuhiro Temma, Koichi Ishihara, B. A. Hirantha Sithira Abeysekera, Tomoaki Kumagai, Fumiyuki Adachi

    2014 IEEE 25TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATION (PIMRC) 1185-1189 2014

    ISSN: 2166-9570

  282. Single-Carrier Transmission with Frequency-Domain based Code-Division Multi-Access Peer-reviewed

    Amnart Boonkajay, Fumiyuki Adachi

    PROCEEDINGS OF THE 20TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC2014) 233-237 2014

    ISSN: 2163-0771

  283. 2-Step Frequency-Domain Iterative Channel Estimation for Training Sequence Inserted Single-Carrier Block Transmission Peer-reviewed

    Tetsuya Yamamoto, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E97B (1) 146-154 2014/01

    DOI: 10.1587/transcom.E97.B.146  

    ISSN: 0916-8516

    eISSN: 1745-1345

  284. Adaptive equalizer for digital power line carrier systems Peer-reviewed

    Norio Sasaki, Tasuku Hanaumi, Takeshi Oda, Fumiyuki Adachi

    IEEJ Transactions on Electronics, Information and Systems 134 (2) 11-266 2014

    Publisher: Institute of Electrical Engineers of Japan

    DOI: 10.1541/ieejeiss.134.258  

    ISSN: 1348-8155 0385-4221

    eISSN: 1348-8155

  285. Compressive Sensing Based Bayesian Sparse Channel Estimation for OFDM Communication Systems: High Performance and Low Complexity Peer-reviewed

    Guan Gui, Li Xu, Lin Shan, Fumiyuki Adachi

    SCIENTIFIC WORLD JOURNAL 2014 2014

    DOI: 10.1155/2014/927894  

    ISSN: 1537-744X

  286. Variable Is Better Than Invariable: Sparse VSS-NLMS Algorithms with Application to Adaptive MIMO Channel Estimation Peer-reviewed

    Guan Gui, Zhang-xin Chen, Li Xu, Qun Wan, Jiyan Huang, Fumiyuki Adachi

    SCIENTIFIC WORLD JOURNAL 2014 2014

    DOI: 10.1155/2014/274897  

    ISSN: 1537-744X

  287. Joint Transmit/Receive MMSE-FDE for Analog Network Coded Single-Carrier Bi-directional Multi-Antenna Relay Peer-reviewed

    Hiroyuki Miyazaki, Tatsunori Obara, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E96B (12) 3153-3162 2013/12

    DOI: 10.1587/transcom.E96.B.3153  

    ISSN: 0916-8516

    eISSN: 1745-1345

  288. A Novel Wireless Network Access Selection Scheme for Heterogeneous Multimedia Traffic Peer-reviewed

    Abolfazl Mehbodniya, Faisal Kaleem, Kang Yen, Fumiyuki Adachi

    IET Networks 2 (4) 214-223 2013/12

    DOI: 10.1049/iet-net.2012.0188  

  289. Performance Analysis of Fountain Codes in Multihop Relay Networks Peer-reviewed

    Ashish James, A. S. Madhukumar, Ernest Kurniawan, Fumiyuki Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 62 (9) 4379-4391 2013/11

    DOI: 10.1109/TVT.2013.2265279  

    ISSN: 0018-9545

    eISSN: 1939-9359

  290. Spectrally Efficient Packet Recovery in Delay Constrained Rateless Coded Multihop Networks Peer-reviewed

    Ashish James, A. S. Madhukumar, Ernest Kurniawan, Fumiyuki Adachi

    IEEE TRANSACTIONS ON COMMUNICATIONS 61 (11) 4462-4474 2013/11

    DOI: 10.1109/TCOMM.2013.091413.120485  

    ISSN: 0090-6778

    eISSN: 1558-0857

  291. Broadband single-carrier transmission techniques

    Gerstacker, W., Adachi, F., Myung, H., Dinis, R.

    Physical Communication 8 2013/09

    DOI: 10.1016/j.phycom.2013.05.003  

  292. Single-carrier frequency domain adaptive antenna array for uplink multi-user MIMO transmission in a cellular system Peer-reviewed

    Wei Peng, Fumiyuki Adachi

    PHYSICAL COMMUNICATION 8 22-30 2013/09

    DOI: 10.1016/j.phycom.2013.02.001  

    ISSN: 1874-4907

  293. A frequency domain multiple-antenna and channel estimation approach for facilitation of UWB technologies coexistence in heterogeneous WPANs Peer-reviewed

    Abolfazl Mehbodniya, Wei Peng, Fumiyuki Adachi, Sonia Aissa

    PHYSICAL COMMUNICATION 8 38-46 2013/09

    DOI: 10.1016/j.phycom.2012.08.003  

    ISSN: 1874-4907

  294. On performance of cooperative network based on OFDM combined with TDM using MMSE-FDC in the presence of nonlinear HPA Peer-reviewed

    Amir Ligata, Haris Gacanin, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2013 2013/07

    DOI: 10.1186/1687-1499-2013-185  

    ISSN: 1687-1499

  295. A fuzzy extension of VIKOR for target network selection in heterogeneous wireless environments Peer-reviewed

    Abolfazl Mehbodniya, Faisal Kaleem, Kang K. Yen, Fumiyuki Adachi

    PHYSICAL COMMUNICATION 7 145-155 2013/06

    DOI: 10.1016/j.phycom.2013.02.002  

    ISSN: 1874-4907

  296. Frequency-Domain Space-Time Block Coded Transmit/Receive Diversity For Single-Carrier Distributed Antenna Network Peer-reviewed

    R. Matsukawa, T. Obara, F. Adachi

    IEICE Communications Express 2 (4) 141-147 2013/04/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI: 10.1587/comex.2.141  

    ISSN: 2187-0136

    More details Close

    In this paper, space-time block coding (STBC) is applied to single-carrier distributed antenna network (SC-DAN). By using the frequency-domain STBC coded joint transmit/receive diversity (FD-STBC-JTRD) for the downlink while using the well-known frequency-domain space-time transmit diversity (FD-STTD) for the uplink, the diversity order is given by the product of the number of distributed antennas and that of mobile terminal (MT) antennas. It is shown by computer simulation that the downlink and uplink can achieve almost the same bit error rate (BER) performance and that by increasing the number of distributed antennas, the BER performance can be significantly improved while keeping the MT complexity low.

  297. MONET special half-issue "recent advances on communications and networking in China" Peer-reviewed

    Victor C. M. Leung, Fumiyuki Adachi, Weixiao Meng, Qilian Liang

    Mobile Networks and Applications 18 (2) 171-173 2013/04

    DOI: 10.1007/s11036-012-0419-6  

    ISSN: 1383-469X

  298. Outage Channel Capacity of Direct/Cooperative AF Relay Switched SC-FDMA Using Spectrum Division/Adaptive Subcarrier Allocation Peer-reviewed

    Masayuki Nakada, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E96B (4) 1001-1011 2013/04

    DOI: 10.1587/transcom.E96.B.1001  

    ISSN: 0916-8516

    eISSN: 1745-1345

  299. Spectrally Efficient Error Free Relay Forwarding in Cooperative Multihop Networks

    Ashish James, A. S. Madhukumar, Fumiyuki Adachi

    2013 IEEE 24TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC) 2255-2259 2013

  300. Transmit FDE Weight Design for Single-Carrier Space-Time Block Coded Joint Transmit/Receive Diversity

    Hiroyuki Miyazaki, Fumiyuki Adachi

    2013 9TH INTERNATIONAL CONFERENCE ON INFORMATION, COMMUNICATIONS AND SIGNAL PROCESSING (ICICS) 2013

  301. A Novel Receiver Design for Training Sequence Inserted OFDM Transmission

    Tetsuya Yamamoto, Fumiyuki Adachi

    2013 IEEE 78TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2013

    ISSN: 2577-2465

  302. Adaptive Transceiver Design for Single Carrier Transmission

    Wei Peng, Fumiyuki Adachi

    2013 IEEE 78TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2013

    ISSN: 1550-2252

  303. Capacity-Fairness Controllable Scheduling for Uplink Single-carrier FDMA

    Takayoshi Iwata, Kazuhiro Kimura, Hiroyuki Miyazaki, Tatsunori Obara, Fumiyuki Adachi

    2013 IEEE 78TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2013

    ISSN: 1550-2252

  304. Impact of Antenna Placement on the Radiation Pattern of Frequency Domain Adaptive Antenna Array

    Wei Peng, Sri Maldia, Hari Asti, Fumiyuki Adachi

    2013 IEEE 78TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2013

    ISSN: 1550-2252

  305. Linearly distributed antenna diversity using single frequency network for high-speed railway communications

    Jimmy Hadi Susanto, Hiroyuki Miyazaki, Katsuhiro Temma, Tetsuya Yamamoto, Tatsunori Obara, Fumiyuki Adachi

    2013 19th Asia-Pacific Conference on Communications, APCC 2013 299-303 2013

    DOI: 10.1109/APCC.2013.6765960  

    ISSN: 2163-0771

  306. Frequency-domain single-carrier spread spectrum with joint FDE and spectrum combining

    Amnart Boonkajay, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    ICICS 2013 - Conference Guide of the 9th International Conference on Information, Communications and Signal Processing 2013

    DOI: 10.1109/ICICS.2013.6782842  

  307. A novel receiver design for training sequence inserted OFDM transmission

    Tetsuya Yamamoto, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2013

    DOI: 10.1109/VTCFall.2013.6692055  

    ISSN: 1550-2252

  308. Guest editorial: Virtual MIMO

    Zhou, Y., Adachi, F., Wong, K.-K., Xia, X.-G., Toumpakaris, D., Steendam, H., Zhu, W.-P., Yang, L.-L.

    IEEE Journal on Selected Areas in Communications 31 (10) 1977-1980 2013

    Publisher:

    DOI: 10.1109/JSAC.2013.131001  

    ISSN: 0733-8716

  309. Interference-aware channel segregation based dynamic channel assignment using SNR-based transmit power control Peer-reviewed

    Yuki Matsumura, Katsuhiro Temma, Koichi Ishihara, B. A. Hirantha Sithira Abeysekera, Tomoaki Kumagai, Fumiyuki Adachi

    ISPACS 2013 - 2013 International Symposium on Intelligent Signal Processing and Communication Systems 792-796 2013

    DOI: 10.1109/ISPACS.2013.6704657  

  310. Least mean square/fourth algorithm for adaptive sparse channel estimation Peer-reviewed

    Guan Gui, Abolfazl Mehbodniya, Fumiyuki Adachi

    IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 296-300 2013

    DOI: 10.1109/PIMRC.2013.6666149  

  311. Adaptive Single-carrier MIMO Transmission Using Joint Tx/Rx MMSE Filtering Peer-reviewed

    Shinya Kumagai, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    2013 IEEE 78TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2013

    ISSN: 1550-2252

  312. Bayesian Sparse Channel Estimation and Data Detection for OFDM Communication Systems Peer-reviewed

    Guan Gui, Abolfazl Mehbodniya, Fumiyuki Adachi

    2013 IEEE 78TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2013

    ISSN: 1550-2252

  313. Analog Single-Carrier Transmission with Frequency-domain Equalization Peer-reviewed

    Thanh Hai Vo, Shinya Kumagai, Tatsunori Obara, Fumiyuki Adachi

    2013 19TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC): SMART COMMUNICATIONS TO ENHANCE THE QUALITY OF LIFE 698-702 2013

    ISSN: 2163-0771

  314. A Novel Wireless Network Access Selection Scheme for Heterogeneous Multimedia Traffic Peer-reviewed

    Abolfazl Mehbodniya, Faisal Kaleem, Kang K. Yen, Fumiyuki Adachi

    2013 IEEE CONSUMER COMMUNICATIONS AND NETWORKING CONFERENCE (CCNC) 485-489 2013

  315. Adaptive Sparse Channel Estimation for Time-Variant MIMO Communication Systems Peer-reviewed

    Guan Gui, Abolfazl Mehbodniya, Fumiyuki Adachi

    2013 IEEE 78TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2013

    ISSN: 1550-2252

  316. Transmit Power Control Suitable for Interference-Aware Channel Segregation Based Dynamic Channel Assignment Peer-reviewed

    Yuki Matsumura, Katsuhiro Temma, Koichi Ishihara, B. A. Hirantha Sithira Abeysekera, Tomoaki Kumagai, Fumiyuki Adachi

    2013 9TH INTERNATIONAL CONFERENCE ON INFORMATION, COMMUNICATIONS AND SIGNAL PROCESSING (ICICS) 113 (301(RCS2013 174-205)) 2013

    ISSN: 0913-5685

  317. Multi-Channel Access in Wireless Networks Using Interference-Aware Channel Segregation Based Dynamic Channel Assignment Peer-reviewed

    Katsuhiro Temma, Yuki Matsumura, Fumiyuki Adachi

    2013 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS AND SIGNAL PROCESSING (WCSP 2013) 2013

    ISSN: 2325-3746

  318. Adaptive Sparse Channel Estimation Using Re-Weighted Zero-Attracting Normalized Least Mean Fourth Peer-reviewed

    Guan Gui, Abolfazl Mehbodniya, Fumiyuki Adachi

    2013 IEEE/CIC INTERNATIONAL CONFERENCE ON COMMUNICATIONS IN CHINA (ICCC) 368-373 2013

    ISSN: 2377-8644

  319. Sparse Channel Estimation for MIMO-OFDM Amplify-and-Forward Two-Way Relay Networks Peer-reviewed

    Guan Gui, Abolfazl Mehbodniya, Fumiyuki Adachi

    2013 IEEE 78TH VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2013

    ISSN: 1550-2252

  320. Sparse Least Mean Fourth Filter with Zero-Attracting l(1)-Norm Constraint Peer-reviewed

    Guan Gui, Fumiyuki Adachi

    2013 9TH INTERNATIONAL CONFERENCE ON INFORMATION, COMMUNICATIONS AND SIGNAL PROCESSING (ICICS) 2013

  321. Adaptive Window Width Control for Cyclic Shifted Pilot Aided Channel Estimation Suitable for SC-ANC Bi-Directional Relay Using Joint Tx/Rx MMSE-FDE Peer-reviewed

    Hiroyuki Miyazaki, Tatsunori Obara, Fumiyuki Adachi

    2013 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS AND SIGNAL PROCESSING (WCSP 2013) 2013

    ISSN: 2325-3746

  322. Joint Tx/Rx MMSE Filtering and Joint Rank Adaptation/Adaptive Modulation for Single-carrier MIMO Packet Transmission Peer-reviewed

    Shinya Kumagai, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    2013 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATIONS SYSTEMS (ISPACS) 573-578 2013

  323. Adaptive Sparse Channel Estimation for Time-Variant MIMO-OFDM Systems Peer-reviewed

    Guan Gui, Fumiyuki Adachi

    2013 9TH INTERNATIONAL WIRELESS COMMUNICATIONS AND MOBILE COMPUTING CONFERENCE (IWCMC) 878-883 2013

    ISSN: 2376-6492

  324. Selective Mapping for Broadband Single-Carrier Transmission Using Joint Tx/Rx MMSE-FDE Peer-reviewed

    Amnart Boonkajay, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    2013 IEEE 24TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC) 641-645 2013

    ISSN: 2166-9570

  325. Variable is Good: Adaptive Sparse Channel Estimation using VSS-ZA-NLMS Algorithm Peer-reviewed

    Guan Gui, Shinya Kumagai, Abolfazl Mehbodniya, Fumiyuki Adachi

    2013 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS AND SIGNAL PROCESSING (WCSP 2013) 2013

    ISSN: 2325-3746

  326. Uplink Capacity and Required Transmit Power of DS-CDMA DAN Peer-reviewed

    Shohei Inoshita, Hiroyuki Miyazaki, Fumiyuki Adachi

    2013 INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING AND COMMUNICATIONS SYSTEMS (ISPACS) 797-801 2013

  327. Improved Adaptive Sparse Channel Estimation Based on the Least Mean Square Algorithm Peer-reviewed

    Guan Gui, Wei Peng, Fumiyuki Adachi

    2013 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) 3105-3109 2013

  328. Joint Cooperative-Transmit and Receive FDE for Single-Carrier Incremental Relaying Peer-reviewed

    Koichi Adachi, Kazuki Takeda, Sumei Sun, Fumiyuki Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 62 (1) 1-13 2013/01

    DOI: 10.1109/TVT.2012.2219566  

    ISSN: 0018-9545

  329. Dynamic Target Wireless Network Selection Technique Using Fuzzy Linguistic Variables Peer-reviewed

    Kaleem Faisal, Mehbodniya Abolfazl, Islam Arif, K. Yen Kang, Adachi Fumiyuki

    CHINA COMMUNICATIONS 10 (1) 1-16 2013/01

    DOI: 10.1109/CC.2013.6457526  

    ISSN: 1673-5447

  330. A fuzzy preprocessing module for optimizing the access network selection in wireless networks Peer-reviewed

    Faisal Kaleem, Abolfazl Mehbodniya, Kang K. Yen, Fumiyuki Adachi

    Advances in Fuzzy Systems 2013 2013

    DOI: 10.1155/2013/232198  

    ISSN: 1687-7101 1687-711X

  331. Efficient resource utilization for heterogeneous wireless personal area networks Peer-reviewed

    Abolfazl Mehbodniya, Sonia Aïssa, Fumiyuki Adachi

    IEICE Transactions on Communications E96-B (6) 1577-1587 2013

    Publisher: Institute of Electronics, Information and Communication, Engineers, IEICE

    DOI: 10.1587/transcom.E96.B.1577  

    ISSN: 1745-1345 0916-8516

  332. Disaster-resilient networking: A new vision based on movable and deployable resource units Peer-reviewed

    Toshikazu Sakano, Zubair Fadlullah, Thuan Ngo, Hiroki Nishiyama, Masataka Nakazawa, Fumiyuki Adachi, Nei Kato, Atsushi Takahara, Tomoaki Kumagai, Hiromichi Kasahara, Shigeki Kurihara

    IEEE Network 27 (4) 40-46 2013

    DOI: 10.1109/MNET.2013.6574664  

    ISSN: 0890-8044

  333. Two-dimensional block-spread CDMA relay using virtual-four-antenna STCDTD Peer-reviewed

    Qi-Yue Yu, Wei-Xiao Meng, Fumiyuki Adachi

    IEEE Transactions on Vehicular Technology 62 (8) 3813-3827 2013

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/TVT.2013.2249120  

    ISSN: 0018-9545

  334. On the performance of bi-directional cognitive radio system with network coding at the physical layer Peer-reviewed

    Amir Ligata, Haris Gacanin, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2013 2013

    DOI: 10.1186/1687-1499-2013-242  

    ISSN: 1687-1499

  335. On performance of analog network coding in the presence of phase noise Peer-reviewed

    Amir Ligata, Haris Gacanin, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2013

    DOI: 10.1186/1687-1499-2013-2  

    ISSN: 1687-1499

  336. Improved least mean square algorithm with application to adaptive sparse channel estimation Peer-reviewed

    Guan Gui, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2013 2013

    DOI: 10.1186/1687-1499-2013-204  

    ISSN: 1687-1499

  337. On performance of analog network coding in the presence of phase noise Peer-reviewed

    Amir Ligata, Haris Gacanin, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2013 2013

    DOI: 10.1186/1687-1499-2013-2  

    ISSN: 1687-1499

  338. Iterative decision-directed estimation and compensation of nonlinear distortion effects for OFDM systems Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 12 (17) 1558-1566 2012/12

    DOI: 10.1002/wcm.1086  

    ISSN: 1530-8669

  339. Recursive QR packet combining for uplink single-carrier multi-user MIMO HARQ using near ML detection Peer-reviewed

    Tetsuya Yamamoto, Koichi Adachi, Sumei Sun, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 12 (18) 1652-1663 2012/12

    DOI: 10.1002/wcm.2334  

    ISSN: 1530-8669

  340. Selected mapping with symbol re-mapping for OFDM/TDM using MMSE-FDE Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 12 (11) 1013-1022 2012/08

    DOI: 10.1002/wcm.1035  

    ISSN: 1530-8669

    eISSN: 1530-8677

  341. Compressed channel estimation of two-way relay networks using mixed-norm sparse constraint Peer-reviewed

    Gui, G., Wan, Q., Adachi, F.

    Research Journal of Applied Sciences, Engineering and Technology 4 (15) 2279-2282 2012/08

  342. Channel Modeling for Digital Transmission using Power Line Peer-reviewed

    Norio Sasaki, Kenichi Seino, Tasuku Hanaumi, Takeshi Oda, Fumiyuki Adachi

    IEEJ Transactions on Electronics, Information and Systems 132 (8) 1317-1327 2012/08

    Publisher: Institute of Electrical Engineers of Japan (IEE Japan)

    DOI: 10.1541/ieejeiss.132.1317  

    ISSN: 0385-4221

    eISSN: 1348-8155

  343. Throughput Optimization in Rateless Coded Cooperative Relay Networks Peer-reviewed

    Ashish James, A. S. Madhukumar, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E95B (5) 1810-1814 2012/05

    DOI: 10.1587/transcom.E95.B.1810  

    ISSN: 0916-8516

    eISSN: 1745-1345

  344. 2-Step QRM-MLBD for Broadband Single-Carrier Transmission Peer-reviewed

    Katsuhiro Temma, Tetsuya Yamamoto, Kyesan Lee, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E95B (4) 1366-1374 2012/04

    DOI: 10.1587/transcom.E95.B.1366  

    ISSN: 0916-8516

    eISSN: 1745-1345

  345. Iterative Superimposed Pilot-Assisted Channel Estimation Using Sliding Wiener Filtering for Single-Carrier Block Transmission Peer-reviewed

    Tetsuya Uchiumi, Tatsunori Obara, Kazuki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E95B (3) 924-932 2012/03

    DOI: 10.1587/transcom.E95.B.924  

    ISSN: 0916-8516

    eISSN: 1745-1345

  346. Performance Analysis of Analog Network Coding with Imperfect Channel Estimation in a Frequency-Selective Fading Channel Peer-reviewed

    Haris Gacanin, Mika Salmela, Fumiyuki Adachi

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 11 (2) 742-750 2012/02

    DOI: 10.1109/TWC.2011.122211.110326  

    ISSN: 1536-1276

  347. Recursive QR Packet Combining for Uplink Single-Carrier Multi-User MIMO HARQ Using Near ML Detection

    Tetsuya Yamamoto, Koichi Adachi, Sumei Sun, Fumiyuki Adachi

    2012 8TH INTERNATIONAL WIRELESS COMMUNICATIONS AND MOBILE COMPUTING CONFERENCE (IWCMC) 407-412 2012

    ISSN: 2376-6492

  348. Adaptive Rateless Coding with Feedback for Cooperative Relay Networks

    Ashish James, A. S. Madhukumar, Fumiyuki Adachi

    2012 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) 2012

    ISSN: 1525-3511

  349. A Dynamic Channel Assignment Scheme for Distributed Antenna Networks

    Ryusuke Matsukawa, Tatsunori Obara, Fumiyuki Adachi

    2012 IEEE 75TH VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2012

    ISSN: 2577-2465

  350. HARQ Throughput Performance of Training Sequence Aided SC-MIMO Using Reduced Complexity ML Block Detection

    Tetsuya Yamamoto, Fumiyuki Adachi

    2012 IEEE 75TH VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2012

    ISSN: 2577-2465

  351. Overlap QRM-ML Block Signal Detection for Single-Carrier Transmission without CP Insertion

    Hideyuki Moroga, Tetsuya Yamamoto, Fumiyuki Adachi

    2012 IEEE 75TH VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2012

    ISSN: 2577-2465

  352. Frequency- domain One- Tap Weight Control for Single- carrier Multiple Access with Multiple Antennas

    Wei Peng, Fumiyuki Adachi, XiangyangWang

    2012 IEEE VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2012

    ISSN: 1550-2252

  353. IBI Cancellation and Circular Property Restoration for Broadband DS-CDMA Using FDE without CP Insertion

    Min Zheng, Wei Peng, Fumiyuki Adachi

    2012 IEEE VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2012

    ISSN: 1550-2252

  354. PERFORMANCE ANALYSIS ON FDE RECEIVER FOR SINGLE CARRIER TRANSMISSION

    Wei Peng, Fumiyuki Adachi

    PROCEEDINGS OF THE 3RD IEEE INTERNATIONAL CONFERENCE ON NETWORK INFRASTRUCTURE AND DIGITAL CONTENT (IEEE IC-NIDC 2012) 81-84 2012

  355. 2-step frequency-domain channel estimation for training sequence inserted single-carrier block transmission

    Tetsuya Yamamoto, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2012

    DOI: 10.1109/VTCFall.2012.6399052  

    ISSN: 1550-2252

  356. Nash bargaining solution based subcarrier allocation for uplink SC-FDMA distributed antenna network

    Yusuke Sato, Matsukawa Ryusuke, Tatsunori Obara, Fumiyuki Adachi

    Proceedings - 2012 3rd IEEE International Conference on Network Infrastructure and Digital Content, IC-NIDC 2012 76-80 2012

    DOI: 10.1109/ICNIDC.2012.6418715  

  357. Multi-AP cooperative diversity for disaster-resilient wireless LAN

    Fumiyuki Adachi, Shinya Kumagai

    International Symposium on Wireless Personal Multimedia Communications, WPMC 27-28 2012

    ISSN: 1347-6890

  358. Iterative overlap QRM-MLBD for single-carrier MIMO transmission without CP insertion

    Hideyuki Moroga, Tetsuya Yamamoto, Fumiyuki Adachi

    International Symposium on Wireless Personal Multimedia Communications, WPMC 409-413 2012

    ISSN: 1347-6890

  359. Performance evaluation of Low-PAPR transmit filter for single-carrier transmission

    Amnart Boonkajay, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    APCC 2012 - 18th Asia-Pacific Conference on Communications: "Green and Smart Communications for IT Innovation" 47-52 2012

    DOI: 10.1109/APCC.2012.6388099  

    ISSN: 2163-0771

  360. Overlap QRM-ML block signal detection for single-carrier transmission without CP insertion

    Hideyuki Moroga, Tetsuya Yamamoto, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2012

    DOI: 10.1109/VETECS.2012.6240278  

    ISSN: 1550-2252

  361. HARQ throughput performance of training sequence aided SC-MIMO using reduced complexity ML block detection

    Tetsuya Yamamoto, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2012

    DOI: 10.1109/VETECS.2012.6240238  

    ISSN: 1550-2252

  362. Guest Editorial broadband wireless communications for high speed vehicles

    Zhou, Y., Adachi, F., Wang, X., Manikas, A., Zhang, X., Zhu, W.

    IEEE Journal on Selected Areas in Communications 30 (4) 2012

    DOI: 10.1109/JSAC.2012.1200501  

  363. Advances in single carrier block modulation with frequency domain processing

    Bar-Ness, Y., Adachi, F., Al Dhahir, N., Falconer, D.D., Sari, H.

    Eurasip Journal on Advances in Signal Processing 2012 (1) 2012

    Publisher:

    DOI: 10.1186/1687-6180-2012-85  

    eISSN: 1687-6180

  364. Application of fuzzy TOPSIS for weighting the system attributes in overlay networks Peer-reviewed

    Faisal Kaleem, Abolfazl Mehbodniya, Kang K. Yen, Fumiyuki Adachi

    14th Asia-Pacific Network Operations and Management Symposium: "Management in the Big Data and IoT Era", APNOMS 2012 - Final Program 2012

    DOI: 10.1109/APNOMS.2012.6356098  

  365. A dynamic weighting of attributes in heterogeneous wireless networks using fuzzy linguistic variables Peer-reviewed

    Abolfazl Mehbodniya, Faisal Kaleem, Kang K. Yen, Fumiyuki Adachi

    2012 1st IEEE International Conference on Communications in China, ICCC 2012 698-703 2012

    DOI: 10.1109/ICCChina.2012.6356974  

  366. Improved Channel Estimation with Partial Sparse Constraint for AF Cooperative Communication Systems Peer-reviewed

    Guan Gui, Wei Peng, Fumiyuki Adachi

    18TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC 2012): GREEN AND SMART COMMUNICATIONS FOR IT INNOVATION 953-958 2012

    ISSN: 2163-0771

  367. Application of FVIKOR Method for Prioritization of Wireless Networks with Multiple Attributes Peer-reviewed

    Abolfazl Mehbodniya, Faisal Kaleem, Kang K. Yen, Fumiyuki Adachi

    2012 IEEE 23RD INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC) 915-920 2012

    ISSN: 2166-9570

  368. Radio Resource Allocation for Low-Medium-Altitude Aerial Platform Based TD-LTE Networks against Disaster Peer-reviewed

    Liqiang Zhao, Jiangtao Yi, Fumiyuki Adachi, Chi Zhang, Hailin Zhang

    2012 IEEE 75TH VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2012

    ISSN: 1550-2252

  369. Joint Tx/Rx Filtering for Single-carrier MIMO Spatial Multiplexing and HARQ Packet Combining Peer-reviewed

    Shinya Kumagai, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    2012 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS (IEEE ICCS 2012) 493-497 2012

  370. Distributed antenna network for gigabit wireless access Peer-reviewed

    Fumiyuki Adachi, Wei Peng, Tatsunori Obara, Tetsuya Yamamoto, Ryusuke Matsukawa, Masayuki Nakada

    AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS 66 (8) 605-612 2012

    DOI: 10.1016/j.aeue.2012.03.010  

    ISSN: 1434-8411

  371. Channel Segregation Based Dynamic Channel Assignment for WLAN Peer-reviewed

    Yuki Matsumura, Shinya Kumagai, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    2012 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS (IEEE ICCS 2012) 463-467 2012

  372. A Fuzzy MADM Ranking Approach for Vertical Mobility in Next Generation Hybrid Networks Peer-reviewed

    Abolfazl Mehbodniya, Faisal Kaleem, Kang K. Yen, Fumiyuki Adachi

    IV INTERNATIONAL CONGRESS ON ULTRA MODERN TELECOMMUNICATIONS AND CONTROL SYSTEMS 2012 (ICUMT) 262-267 2012

  373. Single-Carrier Uplink Cooperative DF Relay Using Instantaneous CSI-Based Adaptive Modulation Peer-reviewed

    Kazuhiro Kimura, Tatsunori Obara, Fumiyuki Adachi

    18TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC 2012): GREEN AND SMART COMMUNICATIONS FOR IT INNOVATION 146-151 2012

    ISSN: 2163-0771

  374. Joint Transmit/Receive MMSE-FDE for MIMO Analog Network Coding in Single-Carrier Bi-Directional Relay Communications Peer-reviewed

    Hiroyuki Miyazaki, Masayuki Nakada, Tatsunori Obara, Fumiyuki Adachi

    2012 IEEE VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2012

    ISSN: 1550-2252

  375. Power Allocation For Direct/Cooperative AF Relay Switched SC-FDMA Peer-reviewed

    Masayuki Nakada, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    2012 IEEE 75TH VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2012

    ISSN: 1550-2252

  376. Spectral Efficiency of Distributed Antenna Network Using MIMO Spatial Multiplexing Peer-reviewed

    Shinya Kumagai, Ryusuke Matsukawa, Tatsunori Obara, Tetsuya Yamamoto, Fumiyuki Adachi

    2012 IEEE VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2012

    ISSN: 1550-2252

  377. Training Sequence Inserted Single-Carrier Transmission Using 2-Step QRM-ML Block Signal Detection Peer-reviewed

    Katsuhiro Temma, Tetsuya Yamamoto, Fumiyuki Adachi

    2012 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS (IEEE ICCS 2012) 498-502 2012

  378. Compressed Channel Estimation for Sparse Multipath Non-orthogonal Amplify-and-forward Cooperative Networks Peer-reviewed

    Guan Gui, Wei Peng, Abolfazl Mehbodniya, Fumiyuki Adachi

    2012 IEEE 75TH VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) 2012

    ISSN: 1550-2252

  379. Uplink Capacity of OFDM Multi-User MIMO Using Near-ML Detection in a Cellular System Peer-reviewed

    Masashi Itagaki, Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E95B (1) 198-205 2012/01

    DOI: 10.1587/transcom.E95.B.198  

    ISSN: 0916-8516

    eISSN: 1745-1345

  380. 2-step QRM-MLBD using Detection Ordering for Single-Carrier Transmission Peer-reviewed

    Katsuhiro Temma, Tetsuya Yamamoto, Fumiyuki Adachi

    2012 IEEE 75TH VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) E95-B (4) 1366-1374 2012

    DOI: 10.1587/transcom.E95.B.1366  

    ISSN: 1550-2252

  381. Multi-layer WSN with power efficient buffer management policy Peer-reviewed

    H. Y. Shwe, W. Peng, H. Gacanin, F. Adachi

    Progress in Electromagnetics Research Letters 31 131-145 2012

    DOI: 10.2528/PIERL11121605  

    ISSN: 1937-6480

  382. Impact of Antenna Placement on Frequency Domain Adaptive Antenna Array in Hybrid FRF Cellular System Peer-reviewed

    Sri Maldia Hari Asti, Wei Peng, Fumiyuki Adachi

    INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION 2012 2012

    DOI: 10.1155/2012/538161  

    ISSN: 1687-5869

  383. Performance of pilot-assisted channel estimation without feedback for broadband ANC systems using OFDM access Peer-reviewed

    Iulia Prodan, Tatsunori Obara, Fumiyuki Adachi, Haris Gacanin

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 1-10 2012

    DOI: 10.1186/1687-1499-2012-315  

    ISSN: 1687-1499

  384. An Adaptive Weighted Clustering Algorithm for Cooperative Communications Peer-reviewed

    Qiyue Yu, Weixiao Meng, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E94B (12) 3251-3258 2011/12

    DOI: 10.1587/transcom.E94.B.3251  

    ISSN: 0916-8516

    eISSN: 1745-1345

  385. Iterative MMSE Detection with Interference Cancellation for Up-Link HARQ Using Frequency-Domain Filtered SC-FDMA MIMO Multiplexing Peer-reviewed

    Suguru Okuyama, Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E94B (12) 3559-3568 2011/12

    DOI: 10.1587/transcom.E94.B.3559  

    ISSN: 0916-8516

    eISSN: 1745-1345

  386. Recent advances in single-carrier distributed antenna network Peer-reviewed

    Fumiyuki Adachi, Kazuki Takeda, Tetsuya Yamamoto, Ryusuke Matsukawa, Shinya Kumagai

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 11 (12) 1551-1563 2011/12

    DOI: 10.1002/wcm.1212  

    ISSN: 1530-8669

  387. Direction of arrival estimation using modified orthogonal matching pursuit algorithm Peer-reviewed

    Guan, G., Wan, Q., Adachi, F.

    International Journal of Physical Sciences 6 (22) 5230-5234 2011/10/02

  388. Iterative MMSE-FDE/MUI Cancellation and Antenna Diversity for Frequency-Domain Filtered SC-FDMA Uplink Peer-reviewed

    Suguru Okuyama, Kazuki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E94B (10) 2847-2856 2011/10

    DOI: 10.1587/transcom.E94.B.2847  

    ISSN: 0916-8516

    eISSN: 1745-1345

  389. Frequency Domain Adaptive Antenna Array for Broadband Single-Carrier Uplink Transmission Peer-reviewed

    Wei Peng, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E94B (7) 2003-2012 2011/07

    DOI: 10.1587/transcom.E94.B.2003  

    ISSN: 0916-8516

    eISSN: 1745-1345

  390. BER analysis of DS-UWB system employing a laplace distribution model Peer-reviewed

    Abolfazl Mehbodniya, Sonia Aissa, Fumiyuki Adachi

    IEICE ELECTRONICS EXPRESS 8 (13) 1089-1095 2011/07

    DOI: 10.1587/elex.8.1089  

    ISSN: 1349-2543

  391. Uplink Capacity of A Cellular System Using Multi-user Single-carrier MIMO Multiplexing Combined with Frequency-domain Equalization and Transmit Power Control Peer-reviewed

    Takahiro Chiba, Kazuaki Takeda, Kazuki Takeda, Fumiyuki Adachi

    WIRELESS PERSONAL COMMUNICATIONS 58 (3) 455-468 2011/06

    DOI: 10.1007/s11277-010-0130-5  

    ISSN: 0929-6212

    eISSN: 1572-834X

  392. Compressed Channel Estimation for Sparse Multipath Two-Way Relay Networks Peer-reviewed

    G. Gui, Z. Chen, Q. Meng, Q. Wan, F. Adachi

    International Journal of the Physical Sciences 6(12) (12) 2782-2788 2011/06

  393. Joint MMSE-FDE & Spectrum Combining for a Broadband Single-Carrier Transmission in the Presence of Timing Offset Peer-reviewed

    Tatsunori Obara, Kazuki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E94B (5) 1366-1375 2011/05

    DOI: 10.1587/transcom.E94.B.1366  

    ISSN: 0916-8516

    eISSN: 1745-1345

  394. Transmission Performance of Frequency-Domain Filtered Single-Carrier Transmission Using Frequency-Domain Block Signal Detection with QRM-MLD Peer-reviewed

    Tetsuya Yamamoto, Kazuki Takeda, KyeSan Lee, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E94B (5) 1386-1395 2011/05

    DOI: 10.1587/transcom.E94.B.1386  

    ISSN: 0916-8516

    eISSN: 1745-1345

  395. Joint Iterative Transmit/Receive FDE & FDIC for Single-Carrier Block Transmissions Peer-reviewed

    Kazuki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E94B (5) 1396-1404 2011/05

    DOI: 10.1587/transcom.E94.B.1396  

    ISSN: 0916-8516

    eISSN: 1745-1345

  396. Load-Balancing Spectrum Decision for Cognitive Radio Networks Peer-reviewed

    Li-Chun Wang, Chung-Wei Wang, Fumiyuki Adachi

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 29 (4) 757-769 2011/04

    DOI: 10.1109/JSAC.2011.110408  

    ISSN: 0733-8716

  397. Performance Comparison of Overlap FDE and Sliding-Window Chip Equalization for Multi-Code DS-CDMA in a Frequency-Selective Fading Channel Peer-reviewed

    Tatsunori Obara, Kazuki Takeda, Kyesan Lee, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E94B (3) 750-757 2011/03

    DOI: 10.1587/transcom.E94.B.750  

    ISSN: 0916-8516

    eISSN: 1745-1345

  398. Sparse signal recovery with OMP algorithm using sensing measurement matrix Peer-reviewed

    Guan Gui, Abolfazl Mehbodniya, Qun Wan, Fumiyuki Adachi

    IEICE ELECTRONICS EXPRESS 8 (5) 285-290 2011/03

    DOI: 10.1587/elex.8.285  

    ISSN: 1349-2543

  399. Estimation of multipath time delays based on bi-sparse constraint Peer-reviewed

    G. Gui, Z. Chen, Q. Wan, A. Huang, F. Adachi

    International Journal of the Physical Sciences 6(3) 402-406 2011/02/04

  400. On Performance of Bi-directional Cognitive Radio Networks

    Amir Ligata, Haris Gacanin, Fumiyuki Adachi

    17TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC 2011) 1-5 2011

    ISSN: 2163-0771

  401. Pilot-assisted Channel Estimation Without Feedback for Bi-directional Broadband ANC

    Iulia Prodan, Tatsunori Obara, Fumiyuki Adachi, Haris Gacanin

    17TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC 2011) 157-162 2011

    ISSN: 2163-0771

  402. MMSE Weight for Single-carrier Overlap FDE

    Tatsunori Obara, Fumiyuki Adachi

    17TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC 2011) 168-172 2011

    ISSN: 2163-0771

  403. On Performance of Cooperative OFDM/TDM with Frequency-Domain Equalization in A Multipath Wireless Channel

    Amir Ligata, Haris Gacanin, Fumiyuki Adachi

    17TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC 2011) 665-670 2011

    ISSN: 2163-0771

  404. Training Sequence-aided QRM-MLD Block Signal Detection for Single-carrier MIMO Spatial Multiplexing

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    2011 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 2011

    ISSN: 1550-3607

  405. Single-carrier Incremental Relaying with Joint Tx/Rx FDE

    Kazuki Takeda, Koichi Adachi, Sumei Sun, Fumiyuki Adachi

    2011 IEEE VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2011

    ISSN: 1550-2252

  406. Study on the Capacity of Distributed Antenna Network System by using Single Carrier Frequency Domain Adaptive Antenna Array

    Wei Peng, Fumiyuki Adachi

    2011 6TH INTERNATIONAL ICST CONFERENCE ON COMMUNICATIONS AND NETWORKING IN CHINA (CHINACOM) 655-658 2011

  407. Adaptive single-carrier transmission using QRM-ML block signal detection

    Tetsuya Yamamoto, Fumiyuki Adachi

    ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing 2011

    DOI: 10.1109/ICICS.2011.6174277  

  408. Capacity and BER performance considerations on single-carrier frequency-domain equalization

    Fumiyuki Adachi, Tatsunori Obara, Tetsuya Yamamoto

    ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing 2011

    DOI: 10.1109/ICICS.2011.6174246  

  409. Training sequence-aided QRM-MLD block signal detection for single-carrier MIMO spatial multiplexing

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    IEEE International Conference on Communications 2011

    DOI: 10.1109/icc.2011.5963480  

    ISSN: 0536-1486

  410. Impact of the channel time-selectivity on BER performance of broadband analog network coding with two-slot channel estimation

    Haris Gacanin, Mika Salmela, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2011

    DOI: 10.1109/VETECS.2011.5956450  

    ISSN: 1550-2252

  411. HARQ throughput enhancement using maximum likelihood block detection with recursive QR packet combining and M-algorithm for single-carrier MIMO

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    2011 8th International Workshop on Multi-Carrier Systems and Solutions, MC-SS 2011 2011

    DOI: 10.1109/MC-SS.2011.5910701  

  412. Guest editorial: Distributed broadband wireless communications

    Wang, J., Adachi, F., Gameiro, A., Gomes, N.J., Kitayama, K.-I., Monteiro, P., Sawahashi, M., Xia, X.-G.

    IEEE Journal on Selected Areas in Communications 29 (6) 2011

    DOI: 10.1109/JSAC.2011.110601  

  413. A constrained equalization scheme for mobile location in non-line-of-sight environments

    Chen, Z.-X., Gui, G., Wan, Q., Adachi, F.

    International Journal of Physical Sciences 6 (18) 2011

  414. Pilot-assisted channel estimation for coexisting heterogeneous wireless personal area networks Peer-reviewed

    Abolfazl Mehbodniya, Fumiyuki Adachi, Gui Guan

    ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing 2011

    DOI: 10.1109/ICICS.2011.6173558  

  415. Improved 2-step QRM-ML block signal detection for single-carrier transmission Peer-reviewed

    Katsuhiro Temma, Tetsuya Yamamoto, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2011

    DOI: 10.1109/VETECF.2011.6093118  

    ISSN: 1550-2252

  416. Power Efficient Adaptive Network Coding in Wireless Sensor Networks Peer-reviewed

    Hnin Yu Shwe, Fumiyuki Adachi

    2011 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 2011

    ISSN: 1550-3607

  417. Gigabit Distributed Antenna Network And Its Related Wireless Techniques Peer-reviewed

    Fumiyuki Adachi, Kazuki Takeda, Tetsuya Yamamoto, Ryusuke Matsukawa

    2011 7TH INTERNATIONAL WIRELESS COMMUNICATIONS AND MOBILE COMPUTING CONFERENCE (IWCMC) 1550-1556 2011

    ISSN: 2376-6492

  418. Iterative MMSE Detection and Interference Cancellation for Uplink SC-FDMA MIMO using HARQ Peer-reviewed

    Suguru Okuyama, Kazuki Takeda, Fumiyuki Adachi

    2011 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 2011

    ISSN: 1550-3607

  419. Multi-user Downlink Transmit Beamforming for the Broadband Single-Carrier Distributed Antenna Network Peer-reviewed

    Wei Peng, Fumiyuki Adachi

    2011 IEEE VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2011

    ISSN: 1090-3038

  420. Improved 2-step QRM-ML Block Signal Detection for Single-Carrier Transmission Peer-reviewed

    Katsuhiro Temma, Tetsuya Yamamoto, Fumiyuki Adachi

    2011 IEEE VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2011

    ISSN: 1090-3038

  421. A Code Assignment Algorithm for Multi-user/Multi-rate 2-Dimensional Block Spread SC-CDMA Peer-reviewed

    Qiyue Yu, Weixiao Meng, Fumiyuki Adachi

    2011 6TH INTERNATIONAL ICST CONFERENCE ON COMMUNICATIONS AND NETWORKING IN CHINA (CHINACOM) 156-160 2011

  422. Downlink Throughput Performance of Distributed Antenna Network Using Transmit/Receive Diversity Peer-reviewed

    Ryusuke Matsukawa, Tatsunori Obara, Kazuki Takeda, Fumiyuki Adachi

    2011 IEEE VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL) 2011

    ISSN: 1090-3038

  423. Frequency-Domain Block Signal Detection with QRM-MLD for Training Sequence-Aided Single-Carrier Transmission Peer-reviewed

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING 2011 2011

    DOI: 10.1155/2011/575706  

    ISSN: 1687-6172

  424. Joint IterativeTx/Rx MMSE-FDE and ISI Cancellation for Single-Carrier Hybrid ARQ with Chase Combining Peer-reviewed

    Kazuki Takeda, Fumiyuki Adachi

    EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING 2011 2011

    DOI: 10.1155/2011/569251  

    ISSN: 1687-6172

  425. On Channel Estimation for Analog Network Coding in a Frequency-Selective Fading Channel Peer-reviewed

    Haris Gacanin, Tomas Sjodin, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2011 2011

    DOI: 10.1155/2011/980430  

    ISSN: 1687-1499

  426. Bit Error Rate Analysis for an OFDM System with Channel Estimation in a Nonlinear and Frequency-Selective Fading Channel Peer-reviewed

    Amir Ligata, Haris Gacanin, Fumiyuki Adachi, Miha Smolnikar, Mihael Mohorcic

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2011 2011

    DOI: 10.1155/2011/670637  

    ISSN: 1687-1499

  427. Compressive estimation of cluster-sparse channels Peer-reviewed

    G. Gui, N. Zheng, N. Wang, A. Mehbodniya, F. Adachi

    Progress In Electromagnetics Research C 24 251-263 2011

    DOI: 10.2528/PIERC11092005  

    ISSN: 1937-8718 1530-9681

  428. On transmission performance of OFDM-based schemes using MMSE-FDE in a frequency-selective fading channel Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2011

    DOI: 10.1186/1687-1499-2011-193  

    ISSN: 1687-1499

  429. Distributed Antenna Network for Gigabit Wireless Access Peer-reviewed

    Fumiyuki Adachi, Wei Peng, Tatsunori Obara, Tetsuya Yamamoto, Ryusuke Matsukawa, Masayuki Nakada

    2011 IEEE 54TH INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS (MWSCAS) 66 (8) 605-612 2011

    DOI: 10.1016/j.aeue.2012.03.010  

    ISSN: 1548-3746

  430. Modeling and Analysis for Reactive-Decision Spectrum Handoff in Cognitive Radio Networks Peer-reviewed

    Chung-Wei Wang, Li-Chun Wang, Fumiyuki Adachi

    2010 IEEE Global Telecommunications Conference (Globecom 2010) 2010/12

    DOI: 10.1109/globecom14154.2010  

    ISSN: 1930-529X

  431. Joint Tx/iterative Rx FDE for broadband direct-sequence code division multiple access Peer-reviewed

    K. Takeda, F. Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 10 (12) 1537-1547 2010/12

    DOI: 10.1002/wcm.1063  

    ISSN: 1530-8669

  432. Recent Advances in Single-Carrier Frequency-Domain Equalization and Distributed Antenna Network Invited Peer-reviewed

    Fumiyuki Adachi, Kazuki Takeda, Tatsunori Obara, Tetsuya Yamamoto, Hiroki Matsuda

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E93A (11) 2201-2211 2010/11

    DOI: 10.1587/transfun.E93.A.2201  

    ISSN: 0916-8508

    eISSN: 1745-1337

  433. Joint Water Filling-MRT Downlink Transmit Diversity for a Broadband Single-Carrier Distributed Antenna Network Peer-reviewed

    Hiroki Matsuda, Kazuki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E93B (10) 2753-2760 2010/10

    DOI: 10.1587/transcom.E93.B.2753  

    ISSN: 0916-8516

    eISSN: 1745-1345

  434. User Selection Criteria for Multiuser Systems With Optimal and Suboptimal LR Based Detectors Peer-reviewed

    Jinho Choi, Fumiyuki Adachi

    IEEE TRANSACTIONS ON SIGNAL PROCESSING 58 (10) 5467-5473 2010/10

    DOI: 10.1109/TSP.2010.2053361  

    ISSN: 1053-587X

    eISSN: 1941-0476

  435. Joint transmit/receive one-tap minimum mean square error frequency-domain equalisation for broadband multicode direct-sequence code division multiple access Peer-reviewed

    K. Takeda, F. Adachi

    IET COMMUNICATIONS 4 (14) 1752-1764 2010/09

    DOI: 10.1049/iet-com.2009.0502  

    ISSN: 1751-8628

  436. Broadband Analog Network Coding Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 9 (5) 1577-1583 2010/05

    DOI: 10.1109/TWC.2010.05.091053  

    ISSN: 1536-1276

  437. Estimation of CSI for LST BS-CDMA Systems using Special Sequences with Pre-Defined Spectral Nulls Peer-reviewed

    Tio Surya Dharma, A. S. Madhukumar, A. B. Premkumar, F. Adachi

    IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 9 (3) 891-897 2010/03

    DOI: 10.1109/TWC.2010.03.081452  

    ISSN: 1536-1276

  438. Impact of User Selection Criteria on Performance of MIMO Detectors in Multiuser Systems

    Jinho Choi, Fumiyuki Adachi

    2010 IEEE 71ST VEHICULAR TECHNOLOGY CONFERENCE 2010

  439. Joint Frequency-domain Equalization & Spectrum Combining for The Reception of SC Signals in the Presence of Timing Offset

    Tatsunori Obara, Kazuki Takeda, Fumiyuki Adachi

    2010 IEEE 71ST VEHICULAR TECHNOLOGY CONFERENCE 2010

    ISSN: 1550-2252

  440. Lattice Reduction-aided Uplink Multi-user MIMO in OFDM Cellular Systems

    Masashi Itagaki, Kazuki Takeda, Fumiyuki Adachi

    2010 IEEE 72ND VEHICULAR TECHNOLOGY CONFERENCE FALL 2010

    ISSN: 1550-2252

  441. Single-carrier Frequency Domain Adaptive Antenna Array for Cellular Systems

    Wei Peng, Fumiyuki Adachi

    2010 IEEE 72ND VEHICULAR TECHNOLOGY CONFERENCE FALL 2010

    ISSN: 1090-3038

  442. Single-carrier Hybrid ARQ Using Joint Iterative Tx/Rx MMSE-FDE & ISI Cancellation

    Kazuki Takeda, Fumiyuki Adachi

    2010 IEEE 72ND VEHICULAR TECHNOLOGY CONFERENCE FALL 2010

    ISSN: 1090-3038

  443. Graphical Demonstration of the Coherent Demodulation of GMSK

    Ho Huat Peh, Tjeng Thiang Tjhung, Fumiyuki Adachi, Tony Quee Seng Quek

    2010 THIRD INTERNATIONAL CONFERENCE ON COMMUNICATIONS AND ELECTRONICS (ICCE) 1-5 2010

  444. Frequency-domain Iterative MUI Cancellation for Uplink SC-FDMA Using Frequency-domain Filtering

    Suguru Okuyama, Kazuki Takeda, Fumiyuki Adachi

    2010 IEEE 72ND VEHICULAR TECHNOLOGY CONFERENCE FALL 2010

    ISSN: 1550-2252

  445. Single-carrier hybrid ARQ using joint transmit/receive MMSE-FDE

    Kazuki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2010

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VETECS.2010.5493784  

    ISSN: 1550-2252

  446. Bit error rate analysis for wireless network coding with imperfect channel state information

    Haris Gacanin, Mika Salmela, Fumiyuki Adachi

    12th IEEE International Conference on Communication Systems 2010, ICCS 2010 203-207 2010

    DOI: 10.1109/ICCS.2010.5685894  

  447. MMSE frequency-domain equalization using spectrum combining for nyquist filtered broadband single-carrier transmission

    Suguru Okuyama, Kazuki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2010

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VETECS.2010.5493922  

    ISSN: 1550-2252

  448. Frequency-domain block signal detection with QRM-MLD for frequency-domain filtered single-carrier transmission

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2010

    DOI: 10.1109/VETECF.2010.5594180  

    ISSN: 1550-2252

  449. Frequency-domain block signal detection for single-carrier transmission

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    IEICE Transactions on Communications E93-B (8) 2104-2112 2010

    Publisher: Institute of Electronics, Information and Communication, Engineers, IEICE

    DOI: 10.1587/transcom.E93.B.2104  

    ISSN: 1745-1345 0916-8516

  450. Training sequence-aided single-carrier block signal detection using QRM-MLD

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    IEEE Wireless Communications and Networking Conference, WCNC 2010

    DOI: 10.1109/WCNC.2010.5506708  

    ISSN: 1525-3511

  451. Coordinated and distributed MIMO

    Wang, J., Adachi, F., Xia, X.

    IEEE Wireless Communications 17 (3) 2010

    DOI: 10.1109/MWC.2010.5490975  

  452. Computationally efficient 2-step QRM-MLD for single-carrier transmissions Peer-reviewed

    Katsuhiro Temma, Tetsuya Yamamoto, Fumiyuki Adachi

    12th IEEE International Conference on Communication Systems 2010, ICCS 2010 782-786 2010

    DOI: 10.1109/ICCS.2010.5685879  

  453. Downlink Transmit Diversity For Broadband Single-carrier Distributed Antenna Network Peer-reviewed

    Hiroki Matsuda, Kazuki Takeda, Fumiyuki Adachi

    2010 IEEE 71ST VEHICULAR TECHNOLOGY CONFERENCE 2010

    ISSN: 1550-2252

  454. A Novel Stability Weighted Clustering Algorithm for Multi-hop Packet Radio Virtual Cellular Network Peer-reviewed

    Qiyue Yu, Na Zhang, Weixiao Meng, Fumiyuki Adachi

    2010 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC 2010) 2010

  455. Frequency-domain Block Signal Detection with QRM-MLD for Frequency-domain Filtered Single-carrier Transmission Peer-reviewed

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    2010 IEEE 72ND VEHICULAR TECHNOLOGY CONFERENCE FALL E93-B (8) 2104-2112 2010

    DOI: 10.1587/transcom.E93.B.2104  

    ISSN: 1090-3038

  456. The Performance of Network Coding at the Physical Layer with Imperfect Self-Information Removal Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2010 2010

    DOI: 10.1155/2010/659291  

    ISSN: 1687-1472

  457. Advances in Relay Networks: Performance and Capacity Analysis of Space-Time Analog Network Coding Peer-reviewed

    Shujaat Ali Khan Tanoli, Imran Khan, Nandana Rajatheva, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2010 2010

    DOI: 10.1155/2010/232754  

    ISSN: 1687-1499

  458. Introduction of Frequency-Domain Signal Processing to Broadband Single-Carrier Transmissions in a Wireless Channel Invited Peer-reviewed

    Fumiyuki Adachi, Hiromichi Tomeba, Kazuki Takeda

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (9) 2789-2808 2009/09

    DOI: 10.1587/transcom.E92.B.2789  

    ISSN: 0916-8516

    eISSN: 1745-1345

  459. Pilot-Assisted Channel Estimation for Orthogonal Multi-Carrier DS-CDMA with Frequency-Domain Equalization Peer-reviewed

    Tomoyuki Shima, Hiromichi Tomeba, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (9) 2874-2881 2009/09

    DOI: 10.1587/transcom.E92.B.2874  

    ISSN: 0916-8516

    eISSN: 1745-1345

  460. Performance Comparison between CDTD and STTD for DS-CDMA/MMSE-FDE with Frequency-Domain ICI Cancellation Peer-reviewed

    Kazuaki Takeda, Yohei Kojima, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (9) 2882-2890 2009/09

    DOI: 10.1587/transcom.E92.B.2882  

    ISSN: 0916-8516

    eISSN: 1745-1345

  461. hroughput of Type II HARQ-OFDM/TDM using MMSE-FDE in a Multipath Channel Peer-reviewed

    H. Gacanin

    Research Letters in Communications 2009 2009/09

  462. Throughput of Type II HARQ-OFDM/TDM using MMSE-FDE in a Multipath Channel Peer-reviewed

    H. Gacanin, F. Adachi

    Research Letters in Communications 2009 2009/09

    DOI: 10.1155/2009/695620  

  463. Multiuser Detection for Asynchronous Broadband Single-Carrier Transmission Systems Peer-reviewed

    Koichi Ishihara, Yasushi Takatori, Shuji Kubota, Fumiyuki Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 58 (6) 3066-3071 2009/07

    DOI: 10.1109/TVT.2009.2012716  

    ISSN: 0018-9545

  464. 2-Step Maximum Likelihood Channel Estimation for Multicode DS-CDMA with Frequency-Domain Equalization Peer-reviewed

    Yohei Kojima, Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (6) 2065-2071 2009/06

    DOI: 10.1587/transcom.E92.B.2065  

    ISSN: 0916-8516

    eISSN: 1745-1345

  465. Frequency-Domain Equalization for Broadband Single-Carrier Multiple Access Invited Peer-reviewed

    Fumiyuki Adachi, Hiromichi Tomeba, Kazuki Takeda

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (5) 1441-1456 2009/05

    DOI: 10.1587/transcom.E92.B.1441  

    ISSN: 0916-8516

    eISSN: 1745-1345

  466. RLS Channel Estimation with Adaptive Forgetting Factor for DS-CDMA Frequency-Domain Equalization Peer-reviewed

    Yohei Kojima, Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (5) 1457-1465 2009/05

    DOI: 10.1587/transcom.E92.B.1457  

    ISSN: 0916-8516

    eISSN: 1745-1345

  467. Joint Frequency-Domain Equalization and Despreading for Multi-Code DS-CDMA Using Cyclic Delay Transmit Diversity Peer-reviewed

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (5) 1563-1572 2009/05

    DOI: 10.1587/transcom.E92.B.1563  

    ISSN: 0916-8516

    eISSN: 1745-1345

  468. Adaptive Code Assignment Algorithm for a Multi-User/Multi-Rate CDMA System Peer-reviewed

    Qiyue Yu, Fumiyuki Adachi, Weixiao Meng

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (5) 1600-1607 2009/05

    DOI: 10.1587/transcom.E92.B.1600  

    ISSN: 0916-8516

    eISSN: 1745-1345

  469. Hybrid Frequency Reuse Scheme for Cellular MIMO Systems Peer-reviewed

    Wei Peng, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (5) 1641-1648 2009/05

    DOI: 10.1587/transcom.E92.B.1641  

    ISSN: 0916-8516

    eISSN: 1745-1345

  470. A Novel Cooperative Relaying Network Scheme with Inter-Relay Data Exchange Peer-reviewed

    Salma Ait Fares, Fumiyuki Adachi, Eisuke Kudoh

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (5) 1786-1795 2009/05

    DOI: 10.1587/transcom.E92.B.1786  

    ISSN: 0916-8516

    eISSN: 1745-1345

  471. Performance Improvement by Frequency-Domain Interleaving for OFDM/TDM Using MMSE-FDE in a Wireless Channel Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (5) 1813-1817 2009/05

    DOI: 10.1587/transcom.E92.B.1813  

    ISSN: 0916-8516

    eISSN: 1745-1345

  472. Throughput Performance of MC-CDMA HARQ Using ICI Cancellation Peer-reviewed

    Kaoru Fukuda, Akinori Nakajima, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (2) 491-498 2009/02

    DOI: 10.1587/transcom.E92.B.491  

    ISSN: 0916-8516

    eISSN: 1745-1345

  473. Theoretical Analysis of Joint THP/pre-FDE For Single-carrier Signal Transmissions

    Kazuki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    2009 IEEE WIRELESS COMMUNICATIONS & NETWORKING CONFERENCE, VOLS 1-5 559-564 2009

    ISSN: 1525-3511

  474. BROADBAND WIRELESS SINGLE-CARRIER TRANSMISSION USING JOINT TRANSMIT/RECEIVE FREQUENCY-DOMAIN EQUALIZATION

    Kazuki Takeda, Fumiyuki Adachi

    2009 IEEE INTERNATIONAL CONFERENCE ON NETWORK INFRASTRUCTURE AND DIGITAL CONTENT, PROCEEDINGS 881-885 2009

    DOI: 10.1109/ICNIDC.2009.5360995  

  475. A Bandpass Continuous-Time ΔΣ Modulator Using a Parallel-DAC to Reduce Jitter Sensitivity

    Fumiyuki Adachi, Kazuya Machida, Takao Waho

    ISCAS: 2009 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1-5 2261-2264 2009

    ISSN: 0271-4302

  476. A Study of Frequency-Domain Signal Detection for Single-Carrier Transmission

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4 698-702 2009

    ISSN: 2577-2465

  477. Frequency domain adaptive antenna array algorithm for single-carrier uplink transmission

    Wei Peng, Fumiyuki Adachi

    IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2514-2518 2009

    DOI: 10.1109/PIMRC.2009.5449832  

  478. Nonlinear decision-feedback equalization for OFDM in a fast fading channel

    Haris Gacanin, Fumiyuki Adachi

    IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2648-2652 2009

    DOI: 10.1109/PIMRC.2009.5450360  

  479. A study of frequency-domain signal detection for single-carrier transmission

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2009

    DOI: 10.1109/VETECF.2009.5378757  

    ISSN: 1550-2252

  480. A framework for uplink capacity evaluation of cellular mimo system

    Peng Wei, Fumiyuki Adachi

    Proceedings of 2009 IEEE International Conference on Network Infrastructure and Digital Content, IEEE IC-NIDC2009 875-880 2009

    DOI: 10.1109/ICNIDC.2009.5360998  

  481. Channel capacity of parallel relaying 2-hop OFDMA virtual cellular network Peer-reviewed

    Hitoshi Ishida, Eisuke Kudoh, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2009

    DOI: 10.1109/VETECF.2009.5378922  

    ISSN: 1550-2252

  482. Joint Cooperative Diversity and Scheduling with Distributed Transmit Beamforming in OFDMA Relay System Peer-reviewed

    Salma Ait Fares, Fumiyuki Adachi, Eisuke Kudoh

    2009 IEEE 20TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS 1332-1336 2009

    DOI: 10.1109/PIMRC.2009.5450356  

  483. Channel Capacity of Parallel Relaying 2-hop OFDMA Virtual Cellular Network Peer-reviewed

    Hitoshi Ishida, Eisuke Kudoh, Fumiyuki Adachi

    2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4 633-637 2009

    ISSN: 1090-3038

  484. Polynomial Prediction RLS Channel Estimation for DS-CDMA Frequency-domain Equalization Peer-reviewed

    Yohei Kojima, Kazuki Takeda, Fumiyuki Adachi

    2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4 926-930 2009

    ISSN: 1090-3038

  485. Virtual MIMO Space Division Multiplexing for MC-CDMA Peer-reviewed

    Koichi Adachi, Fumiyuki Adachi, Masao Nakagawa

    2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4 693-+ 2009

    ISSN: 1550-2252

  486. Multicode DS-CDMA With Joint Transmit/Receive Frequency-domain Equalization Peer-reviewed

    Kazuki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    2009 IEEE 20TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS 541-545 2009

    DOI: 10.1109/PIMRC.2009.5450215  

  487. Multi-user Hybrid FRF Algorithm for Downlink Cellular MIMO Systems Peer-reviewed

    Wei Peng, Fumiyuki Adachi

    2009 IEEE 20TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS 968-972 2009

    DOI: 10.1109/PIMRC.2009.5449831  

  488. Modeling and Analysis of Multi-User Spectrum Selection Schemes in Cognitive Radio Networks Peer-reviewed

    Chung-Wei Wang, Li-Chun Wang, Fumiyuki Adachi

    2009 IEEE 20TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS 828-832 2009

    DOI: 10.1109/PIMRC.2009.5450371  

  489. Channel Capacity of Analog Network Coding in a Wireless Channel Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    2009 IEEE 20TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS 1722-1726 2009

    DOI: 10.1109/PIMRC.2009.5449729  

  490. Performance of Physical Layer Network Coding in a Frequency-selective Fading Channel Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    2009 IEEE 20TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS 928-932 2009

    DOI: 10.1109/PIMRC.2009.5450359  

  491. A Performance of Cooperative Relay Network Based on OFDM/TDM Using MMSE-FDE in a Wireless Channel Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4 628-632 2009

    ISSN: 1090-3038

  492. Wireless Challenge Peer-reviewed

    Fumiyuki Adachi

    IWSDA&apos;09: PROCEEDINGS OF THE FOURTH INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS 3-3 2009

    ISSN: 2150-3680

  493. Throughput Performance of MC-CDMA HARQ using Space-Time Block Coded-Joint Transmit/Receive Diversity Peer-reviewed

    Hiromichi Tomeba, Fumiyuki Adachi

    2009 IEEE 70TH VEHICULAR TECHNOLOGY CONFERENCE FALL, VOLS 1-4 108 (445(RCS2008 212-287)) 916-920 2009

    ISSN: 1090-3038

  494. Application of Cyclic Delay Transmit Diversity to uplink 2-Dimensional Block Spread CDMA with Frequency-Domain Equalization Peer-reviewed

    Qiyue Yu, Weixiao Meng, Bo Liu, Fumiyuki Adachi

    2009 IEEE 20TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS 1742-1746 2009

    DOI: 10.1109/PIMRC.2009.5449845  

  495. Channel Capacity of MC-CDMA and Impact of Residual ICI Peer-reviewed

    Koichi Adachi, Fumiyuki Adachi, Masao Nakagawa

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (1) 219-227 2009/01

    DOI: 10.1587/transcom.E92.B.219  

    ISSN: 0916-8516

    eISSN: 1745-1345

  496. Pilot-Assisted Adaptive Channel Estimation for Coded MC-CDMA with ICI Cancellation Peer-reviewed

    Tatsunori Yui, Hiromichi Tomeba, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E92B (1) 246-253 2009/01

    DOI: 10.1587/transcom.E92.B.246  

    ISSN: 0916-8516

    eISSN: 1745-1345

  497. On Channel Estimation for OFDM/TDM Using MMSE-FDE in a Fast Fading Channel Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2009 2009

    DOI: 10.1155/2009/481214  

    ISSN: 1687-1499

  498. Channel estimation using cyclic delay pilot for SC-MIMO multiplexing Peer-reviewed

    Takafumi Fujimori, Kazuki Takeda, Kazuyuki Ozaki, Akinori Nakajima, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E91B (9) 2925-2932 2008/09

    DOI: 10.1093/ietcom/e91-b.9.2925  

    ISSN: 0916-8516

    eISSN: 1745-1345

  499. Frequency-domain equalisation for block CDMA transmission Peer-reviewed

    F. Adachi, A. Nakajima, K. Takeda, L. Liu, H. Tomeba, T. Yui, K. Fukuda

    EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS 19 (5) 553-560 2008/08

    DOI: 10.1002/ett.1305  

    ISSN: 1124-318X

  500. Combined effect of random transmit power control and inter-path interference cancellation on DS-CDMA packet mobile communications Peer-reviewed

    Eisuke Kudoh, Haruki Ito, ZhiSen Wang, Fumiyuki Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E91A (7) 1589-1596 2008/07

    DOI: 10.1093/ietfec/e91-a.7.1589  

    ISSN: 0916-8508

    eISSN: 1745-1337

  501. On cellular MIMO channel capacity Peer-reviewed

    Koichi Adachi, Fumiyuki Adachi, Masao Nakagawa

    IEICE TRANSACTIONS ON COMMUNICATIONS E91B (7) 2366-2373 2008/07

    DOI: 10.1093/ietcom/e9l-b.7.2366  

    ISSN: 0916-8516

    eISSN: 1745-1345

  502. Iterative overlap FDE for multicode DS-CDMA Peer-reviewed

    Kazuaki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E91B (6) 1942-1951 2008/06

    DOI: 10.1093/ietcom/e91-b.6.1942  

    ISSN: 0916-8516

    eISSN: 1745-1345

  503. Frequency-domain iterative parallel interference cancellation for multicode spread-spectrum MIMO multiplexing Peer-reviewed

    Akinori Nakajima, Deepshikha Garg, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E91B (5) 1531-1539 2008/05

    DOI: 10.1093/ietcom/e91-b.5.1531  

    ISSN: 0916-8516

    eISSN: 1745-1345

  504. Multi-hop link capacity of multi-route multi-hop MRC diversity for a virtual cellular network Peer-reviewed

    Imane Daou, Eisuke Kudoh, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E91B (5) 1568-1574 2008/05

    DOI: 10.1093/ictcom/e91-b.5.1568  

    ISSN: 0916-8516

    eISSN: 1745-1345

  505. Orthogonal multi-carrier DS-CDMA with frequency-domain equalization Peer-reviewed

    Ken Tanaka, Hiromichi Tomeba, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E91B (4) 1055-1062 2008/04

    DOI: 10.1093/ietcom/e91-b.4.1055  

    ISSN: 0916-8516

    eISSN: 1745-1345

  506. BER performance analysis of MC-CDMA with overlap-ME Peer-reviewed

    Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E91B (3) 795-804 2008/03

    DOI: 10.1093/ietcom/e91-b.3.795  

    ISSN: 0916-8516

    eISSN: 1745-1345

  507. PAPR advantage of amplitude clipped OFDM/TDM Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E91B (3) 931-934 2008/03

    DOI: 10.1093/ietcom/e91-b.3.931  

    ISSN: 0916-8516

    eISSN: 1745-1345

  508. Performance Improvement of Joint THP/pre-FDE With Lattice Reduction Using LLL-algorithm

    Kazuki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    2008 11TH IEEE SINGAPORE INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS (ICCS), VOLS 1-3 1379-1383 2008

    DOI: 10.1109/ICCS.2008.4737409  

  509. A Study on Channel Capacities of MC-CDMA MIMO and OFDM MIMO

    Koichi Adachi, Fumiyuki Adachi, Masao Nakagawa

    2008 11TH IEEE SINGAPORE INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS (ICCS), VOLS 1-3 1384-+ 2008

    DOI: 10.1109/ICCS.2008.4737410  

  510. Joint Frequency-Domain Equalization and Despreading for DS-CDMA Cyclic Delay Transmit Diversity

    Tetsuya Yamamoto, Kazuki Takeda, Fumiyuki Adachi

    2008 14TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS, (APCC), VOLS 1 AND 2 450-454 2008

  511. Effects of Channel Estimation Errors on V-BLAST Detection

    Wei Peng, Fumiyuki Adachi, Shaodan Ma, Jiangzhou Wang, Tung-Sang Ng

    GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE 2008

    DOI: 10.1109/GLOCOM.2008.ECP.785  

    ISSN: 1930-529X

  512. Performance Analysis on Maximum Likelihood Detection for Two Input Multiple Output Systems

    Wei Peng, Shaodan Ma, Tung-Sang Ng, Jiangzhou Wang, Fumiyuki Adachi

    68TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2008 456-460 2008

    ISSN: 1550-2252

  513. An Analytical Approach to V-BLAST Detection with Optimal Ordering for Two Input Multiple Output Systems

    Wei Peng, Shaodan Ma, Tung-Sang Ng, Jiangzhou Wang, Fumiyuki Adachi

    68TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2008 930-934 2008

    ISSN: 1550-2252

  514. Frequency-domain interleaving for OFDM/TDM using MMSE-FDE

    Haris Gacanin, Fumiyuki Adachi

    2008 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, PROCEEDINGS, VOLS 1-13 3790-3794 2008

    DOI: 10.1109/ICC.2008.712  

    ISSN: 1550-3607

  515. BER performance of joint THP/pre-FDE

    Kazuki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    2008 IEEE 67TH VEHICULAR TECHNOLOGY CONFERENCE-SPRING, VOLS 1-7 1016-1020 2008

    DOI: 10.1109/VETECS.2008.217  

    ISSN: 1550-2252

  516. A comprehensive performance comparison of OFDM/TDM using MMSE-FDE and conventional OFDM

    Haris Gacanin, Fumiyuki Adachi

    2008 IEEE 67TH VEHICULAR TECHNOLOGY CONFERENCE-SPRING, VOLS 1-7 1404-1408 2008

    DOI: 10.1109/VETECS.2008.295  

    ISSN: 1090-3038

  517. Cellular MIMO channel capacities of MC-CDMA and OFDM

    Koichi Adachi, Fumiyuki Adachi, Masao Nakagawa

    2008 IEEE 67TH VEHICULAR TECHNOLOGY CONFERENCE-SPRING, VOLS 1-7 1980-+ 2008

    DOI: 10.1109/VETECS.2008.447  

    ISSN: 1550-2252

  518. Space-time block coded-joint transmit/receive antenna diversity using more than 4 receive antennas

    Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 961-965 2008

    DOI: 10.1109/VETECF.2008.210  

    ISSN: 1550-2252

  519. DS-CDMA MMSE turbo equalization using 2-step maximum likelihood channel estimation

    Yohei Kojima, Kazuaki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2008

    DOI: 10.1109/VETECF.2008.180  

    ISSN: 1550-2252

  520. Time-domain spreading and frequency-domain spreading for delay-time/code division multi-access

    Kazuki Takeda, Tetsuya Yamamoto, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 1529-1533 2008

    DOI: 10.1109/VETECS.2008.357  

    ISSN: 1550-2252

  521. Frequency-domain eigenbeam-SDM and equalization for single-carrier transmissions

    Ozaki, K., Nakajima, A., Adachi, F.

    IEICE Transactions on Communications E91-B (5) 2008

    DOI: 10.1093/ietcom/e91-b.5.1521  

  522. Throughput analysis of DS-CDMA wireless packet access using frequency-domain equalization and random TPC Peer-reviewed

    Haruki Ito, Eisuke Kudoh, Zhisen Wang, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2008

    DOI: 10.1109/VETECF.2008.399  

    ISSN: 1550-2252

  523. Combined effect of inter-path interference cancellation and random transmit power control on DS-CDMA packet mobile communications Peer-reviewed

    Eisuke Kudoh, Haruki Ito, ZhiSen Wang, Fumiyuki Adachi

    2008 IEEE 67TH VEHICULAR TECHNOLOGY CONFERENCE-SPRING, VOLS 1-7 1604-+ 2008

    DOI: 10.1109/VETECS.2008.372  

    ISSN: 1550-2252

  524. Channel Allocation for a 2-Hop OFDMA Virtual Cellular Network Peer-reviewed

    Hitoshi Ishida, Eisuke Kudoh, Fumiyuki Adachi

    2008 14TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS, (APCC), VOLS 1 AND 2 587-591 2008

  525. DS-CDMA MMSE turbo equalization using 2-step maximum likelihood channel estimation Peer-reviewed

    Yohei Kojima, Kazuaki Takeda, Fumiyuki Adachi

    68TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2008 810-814 2008

    ISSN: 1090-3038

  526. Transmit diversity for DS-CDMA/MMSE-FDE with frequency-domain ICI cancellation Peer-reviewed

    Kazuaki Takeda, Yohei Kojima, Fumiyuki Adachi

    2008 IEEE 67TH VEHICULAR TECHNOLOGY CONFERENCE-SPRING, VOLS 1-7 1057-1061 2008

    DOI: 10.1109/VETECS.2008.225  

    ISSN: 1090-3038

  527. Multi-code MC-CDMA Using Joint CDTD and Inter-code Interference Cancellation Peer-reviewed

    Kazuaki Takeda, Hiromichi Tomeba, Jiangzhou Wang, Fumiyuki Adachi

    68TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2008 880-884 2008

    ISSN: 1550-2252

  528. Frequency Reuse Distance of A 2-hop Virtual Cellular Network Peer-reviewed

    Eisuke Kudoh, Fumiyuki Adachi

    2008 14TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS, (APCC), VOLS 1 AND 2 107 (306(RCS2007 97-111)) 577-581 2008

    ISSN: 0913-5685

  529. Impact of Spreading Factor on Turbo-coded Multi-code MC-CDMA using ICI cancellation Peer-reviewed

    Tatsunori Yui, Hiromichi Tomeba, Fumiyuki Adachi

    2008 14TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS, (APCC), VOLS 1 AND 2 535-539 2008

  530. Selective Mapping with Symbol Re-mapping for OFDM/TDM Using MMSE-FDE Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    68TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2008 1061-1065 2008

    ISSN: 1090-3038

  531. Pilot Assisted Channel Estimation for MC-CDMA Signal Transmission Using Overlap FDE Peer-reviewed

    Hiromichi Tomeba, Kazuki Takeda, Kazuaki Takeda, Fumiyuki Adachi

    2008 11TH IEEE SINGAPORE INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS (ICCS), VOLS 1-3 1106-1110 2008

    DOI: 10.1109/ICCS.2008.4737354  

  532. Time-domain spreading and frequency-domain spreading for delay-time/code division multi-access Peer-reviewed

    Kazuki Takeda, Tetsuya Yamamoto, Fumiyuki Adachi

    2008 IEEE 67TH VEHICULAR TECHNOLOGY CONFERENCE-SPRING, VOLS 1-7 1529-1533 2008

    DOI: 10.1109/VETECS.2008.357  

    ISSN: 1090-3038

  533. On Capacity of OFDM/TDM Using MMSE-FDE in A Nonlinear and Frequency-selective Fading Channel Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    2008 14TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS, (APCC), VOLS 1 AND 2 607-611 2008

  534. Throughput analysis of DS-CDMA Wireless Packet Access using Frequency-domain Equalization and Random TPC Peer-reviewed

    Haruki Ito, Eisuke Kudoh, Zhisen Wang, Fumiyuki Adachi

    68TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2008 1912-1916 2008

    ISSN: 1090-3038

  535. Implementation of Frequency Domain Equalizer for Single Carrier Transmission Peer-reviewed

    Valentin Gheorghiu, Suguru Kameda, Tadashi Takagi, Kazuo Tsubouchi, Fumiyuki Adachi

    2008 4TH INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS, NETWORKING AND MOBILE COMPUTING, VOLS 1-31 108 (250(SR2008 38-68)) 1988-1992 2008

    DOI: 10.1109/WiCom.2008.475  

    ISSN: 0913-5685

  536. Implementation of Single Carrier Packet Transmission with Frequency Domain Equalization Peer-reviewed

    Valentin Gheorghiu, Suguru Kameda, Tadashi Takagi, Kazuo Tsubouchi, Fumiyuki Adachi

    68TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2008 829-833 2008

    ISSN: 1550-2252

  537. Joint Tomlinson-Harashima precoding and frequency-domain equalization for broadband single-carrier transmission Peer-reviewed

    Kazuki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E91B (1) 258-266 2008/01

    DOI: 10.1093/ietcom/e91-b.1.258  

    ISSN: 0916-8516

    eISSN: 1745-1345

  538. Turbo Frequency Domain Equalization for Single Carrier Space-Time Block Coded Transmissions Peer-reviewed

    Baojin Li, Dacheng Yang, Xin Zhang, Yongyu Chang

    GLOBECOM 2008 - 2008 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE E91-B (5) 1521-1530 2008

    DOI: 10.1109/GLOCOM.2008.ECP.910  

    ISSN: 1930-529X

  539. DS-CDMA downlink site diversity with frequency-domain equalization and antenna diversity reception Peer-reviewed

    Hirotaka Sato, Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (12) 3591-3597 2007/12

    DOI: 10.1093/ietcom/e90-b.12.3591  

    ISSN: 0916-8516

    eISSN: 1745-1345

  540. DS-CDMA HARQ with overlap FDE Peer-reviewed

    Kazuki Takeda, Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (11) 3189-3196 2007/11

    DOI: 10.1093/ietcom/e90-b.11.3189  

    ISSN: 0916-8516

    eISSN: 1745-1345

  541. Network and access technologies for new generation mobile communications-overview of National R&D Project in NICT Invited Peer-reviewed

    Fumiyuki Adachi, Hiromitsu Wakana, Hiroyuki Morikawa, Masahiro Kuroda, Hiroshi Harada, Shunkichi Isobe, Ryu Miura, Hiroyo Ogawa

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 7 (8) 937-950 2007/10

    DOI: 10.1002/wcm.508  

    ISSN: 1530-8669

  542. New direction of broadband wireless technology Invited Peer-reviewed

    Fumiyuki Adachi, Eisuke Kudoh

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 7 (8) 969-983 2007/10

    DOI: 10.1002/wem.507  

    ISSN: 1530-8669

  543. Adaptive decision feedback channel estimation with periodic phase correction for frequency-domain equalization in DS-CDMA mobile radios Peer-reviewed

    Le Liu, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (8) 1997-2005 2007/08

    DOI: 10.1093/ietcom/e90-b.8.1997  

    ISSN: 0916-8516

    eISSN: 1745-1345

  544. Delay-time/code division multi-access in frequency-selective channel Peer-reviewed

    F. Adachi, K. Takeda

    ELECTRONICS LETTERS 43 (18) 984-986 2007/08

    DOI: 10.1049/el:20071245  

    ISSN: 0013-5194

  545. Bit error rate analysis of OFDM with pilot-assisted channel estimation Peer-reviewed

    Richol Ku, Shinsuke Takaoka, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (7) 1725-1733 2007/07

    DOI: 10.1093/ietcom/e9O-b.7.1725  

    ISSN: 0916-8516

    eISSN: 1745-1345

  546. Frequency-domain MMSE channel estimation for frequency-domain equalization of DS-CDMA signals Peer-reviewed

    Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (7) 1746-1753 2007/07

    DOI: 10.1093/ietcom/e9O-b.7.1746  

    ISSN: 0916-8516

    eISSN: 1745-1345

  547. Frequency-domain multi-stage soft interference cancellation for DS-CDMA uplink signal transmission Peer-reviewed

    Koichi Ishihara, Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (5) 1152-1161 2007/05

    DOI: 10.1093/ietcom/e90-b.5.1152  

    ISSN: 0916-8516

    eISSN: 1745-1345

  548. Iterative channel estimation for frequency-domain equalization of DSSS signals Peer-reviewed

    Koichi Ishihara, Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (5) 1171-1180 2007/05

    DOI: 10.1093/ietcom/e90-b.5.1171  

    ISSN: 0916-8516

    eISSN: 1745-1345

  549. Frequencly-domain interchip interference cancelation for DS-CDMA downlink transmission Peer-reviewed

    Kazuaki Takeda, Fumiyuki Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 56 (3) 1286-1294 2007/05

    DOI: 10.1109/TVT.2007.895474  

    ISSN: 0018-9545

  550. A DS-CDMA cellular system using band division and channel segregation distributed channel allocation Peer-reviewed

    Suguru Sugawara, Eisuke Kudoh, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (4) 904-909 2007/04

    DOI: 10.1093/ietcom/e90-b.4.904  

    ISSN: 0916-8516

    eISSN: 1745-1345

  551. Frequency-domain adaptive antenna array for multi-code AM MC-CDMA Peer-reviewed

    Osamu Nakamura, Shinsuke Takaoka, Eisuke Kudoh, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (4) 918-925 2007/04

    DOI: 10.1093/ietcom/e90-b.4.918  

    ISSN: 0916-8516

    eISSN: 1745-1345

  552. BER Performance of W-CDMA Reciever Using Adaptive Array Antenna Technique in Indoor LOS/NLOS Environments Peer-reviewed

    Q. Yuan, Y. Takeda, K. Oya, Q. Chen, K. Sawaya, E. Kudoh, F. Adachi

    International Workshop on Antenna Technology 2007 (IWAT '07), 219-222 2007/03

    DOI: 10.1109/IWAT.2007.370115  

  553. Space-time cyclic delay transmit diversity for a multi-code DS-CDMA signal with frequency-domain equalization Invited Peer-reviewed

    Ryoko Kawauchi, Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (3) 591-596 2007/03

    DOI: 10.1093/ietcom/e90-b.3.591  

    ISSN: 0916-8516

    eISSN: 1745-1345

  554. Frequency-domain space-time block coded-joint transmit/receive diversity for direct-sequence spread spectrum signal transmission Peer-reviewed

    Hiromichi Tomeba, kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (3) 597-606 2007/03

    DOI: 10.1093/ietcom/e90-b.3.597  

    ISSN: 0916-8516

    eISSN: 1745-1345

  555. Iterative FDIC using 2D-MMSE FDE for turbo-coded HARQ in SC-MIMO multiplexing Invited Peer-reviewed

    Akinori Nakajima, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (3) 693-695 2007/03

    DOI: 10.1093/ietcom/e90-b.3.693  

    ISSN: 0916-8516

    eISSN: 1745-1345

  556. BER performance of OFDM combined with TDM using frequency-domain equalization Peer-reviewed

    Haris Gacanin, Shinsuke Takaoka, Fumiyuki Adachi

    JOURNAL OF COMMUNICATIONS AND NETWORKS 9 (1) 34-42 2007/03

    ISSN: 1229-2370

  557. Frequency-interleaved spread spectrum with MMSE frequency-domain equalization Peer-reviewed

    Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E90B (2) 260-268 2007/02

    DOI: 10.1093/ietcom/e90-b.2.260  

    ISSN: 0916-8516

    eISSN: 1745-1345

  558. Performance of OFDM/TDM with MMSE-FDE using pilot-assisted channel estimation

    Haris Gacanin, Fumiyuki Adachi

    2007 IEEE WIRELESS COMMUNICATIONS & NETWORKING CONFERENCE, VOLS 1-9 222-226 2007

    DOI: 10.1109/WCNC.2007.47  

    ISSN: 1525-3511

  559. BER performance analysis of joint Tomlonson-Harashima precoding and frequency-domain equalization

    Kazuki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    2007 IEEE WIRELESS COMMUNICATIONS & NETWORKING CONFERENCE, VOLS 1-9 1466-1470 2007

    ISSN: 1525-3511

  560. On cellular MIMO spectrum efficiency

    Koichi Adachi, Fumiyuki Adachi, Masao Nakagawa

    2007 IEEE 66TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5 417-+ 2007

    DOI: 10.1109/VETECF.2007.99  

    ISSN: 1550-2252

  561. A power-controlled 2-dimensional block spread DS-CDMA cellular system with uplink site selection diversity

    Le Liu, Fumiyuki Adachi

    2007 IEEE 66TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5 970-974 2007

    DOI: 10.1109/VETECF.2007.211  

    ISSN: 1090-3038

  562. Single-carrier HARQ using joint THP and FDE

    Kazuki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    2007 IEEE 66TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5 1188-1192 2007

    DOI: 10.1109/VETECF.2007.256  

    ISSN: 1090-3038

  563. Performance of single-carrier frequency-domain adaptive antenna array

    Byeong-Woo Kang, Kazuaki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 491-495 2007

    DOI: 10.1109/VETECF.2007.114  

    ISSN: 1550-2252

  564. HARQ throughput performance of multicode DS-CDMA with MMSE turbo equalization

    Kazuaki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 1603-1607 2007

    DOI: 10.1109/VETECS.2007.334  

    ISSN: 1550-2252

  565. Frequency-domain equalization for block CDMA transmission Peer-reviewed

    F. Adachi, A. Nakajirna, K. Takeda, L. Liu, H. Tomeba, K. Fukuda

    MULTI-CARRIER SPREAD SPECTRUM 2007 1 1-+ 2007

    ISSN: 1876-1100

  566. Joint use of overlap FDE and STTD for MC-CDMA downlink transmission Peer-reviewed

    Hirornichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    2007 IEEE 65TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 1520-1524 2007

    DOI: 10.1109/VETECS.2007.317  

    ISSN: 1550-2252

  567. Downlink site selection transmit diversity with power allocation for a 2-dimensional block spread DS-CDMA cellular system Peer-reviewed

    Le Liu, Fumiyuki Adachi

    2007 IEEE WIRELESS COMMUNICATIONS & NETWORKING CONFERENCE, VOLS 1-9 2014-2018 2007

    ISSN: 1525-3511

  568. Transmit/receive antenna diversity for frequency-interleaved single-carrier spread spectrum multi-access with frequency-domain equalization Peer-reviewed

    Kazuaki Takeda, Fumiyuki Adachi

    2007 IEEE WIRELESS COMMUNICATIONS & NETWORKING CONFERENCE, VOLS 1-9 2003-2007 2007

    ISSN: 1525-3511

  569. Multi-carrier DS-CDMA transmission with frequency-domain equalization Peer-reviewed

    Ken Tanaka, Hiromichi Tomeba, Fumiyuki Adachi

    2007 IEEE WIRELESS COMMUNICATIONS & NETWORKING CONFERENCE, VOLS 1-9 2197-2201 2007

    ISSN: 1525-3511

  570. Uplink capacity of single-carrier frequency-interleaved spread spectrum multiple access Peer-reviewed

    Kazuaki Takeda, Fumiyuki Adachi

    2007 IEEE 66TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5 999-1003 2007

    DOI: 10.1109/VETECF.2007.217  

    ISSN: 1090-3038

  571. LDPC-coded HARQ throughput performance of MC-CDMA using ICI cancellation Peer-reviewed

    Kaoru Fukuda, Akinori Nakajima, Fumiyuki Adachi

    2007 IEEE 66TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5 965-969 2007

    DOI: 10.1109/VETECF.2007.210  

    ISSN: 1090-3038

  572. Researches on new generation mobile network in NICT

    Fumiyuki Adachi, Hiroyo Ogawa, Ryu Miura

    Journal of the National Institute of Information and Communications Technology 53 (4) 1-8 2006/12

    ISSN: 1349-3205

  573. Frequency-domain ICI cancellation with MMSE equalization for DS-CDMA downlink Peer-reviewed

    Kazuaki Takeda, Koichi Ishihara, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (12) 3335-3343 2006/12

    DOI: 10.1093/ietcom/e89-b.12.3335  

    ISSN: 0916-8516

    eISSN: 1745-1345

  574. Iterative frequency-domain soft interference cancellation for multicode DS- and MC-CDMA transmissions and performance comparison Peer-reviewed

    Koichi Ishihara, Kazuaki Takeda, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (12) 3344-3355 2006/12

    DOI: 10.1093/ietcom/e89-b.12.3344  

    ISSN: 0916-8516

    eISSN: 1745-1345

  575. 2-Dimensional OVSF spread/chip-interleaved CDMA Peer-reviewed

    Le Liu, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (12) 3363-3375 2006/12

    DOI: 10.1093/ietcom/e89-b.12.3363  

    ISSN: 0916-8516

    eISSN: 1745-1345

  576. Impact of shadowing correlation on reverse link capacity of DS-CDMA cellular system Invited Peer-reviewed

    Arif Junaidi, Eisuke Kudoh, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (12) 3483-3486 2006/12

    DOI: 10.1093/ietcom/e89-b.12.3483  

    ISSN: 0916-8516

    eISSN: 1745-1345

  577. Joint frequency-domain STTD and antenna diversity reception based on MMSE criterion for OFDM/TDM Peer-reviewed

    Haris Gacanin, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (10) 2952-2955 2006/10

    DOI: 10.1093/ietcom/e89-b.10.2952  

    ISSN: 0916-8516

    eISSN: 1745-1345

  578. Decision feedback chip-level maximum likelihood detection for DS-CDMA in a frequency-selective fading channel Peer-reviewed

    Akihiro Saito, Shinsuke Takaoka, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (9) 2564-2571 2006/09

    DOI: 10.1093/ietcom/e89-b.9.2564  

    ISSN: 0916-8516

    eISSN: 1745-1345

  579. Space-Time Block Coded Joint Transmit/Receive Diversity Peer-reviewed

    H. Tomeba, K. Takeda, F. Adachi

    IEICE Trans. Commun. E89-B (8) 1875-1883 2006/08

    ISSN: 0913-5685

  580. A study on spatial MMSE despreading for OSTSTD in a fast fading channel Peer-reviewed

    Shinsuke Takaoka, Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (8) 2266-2270 2006/08

    DOI: 10.1093/ietcom/e89-b.8.2266  

    ISSN: 0916-8516

    eISSN: 1745-1345

  581. Performance Study of W-CDMA Adaptive Array Antennas Peer-reviewed

    Q. Yuan, T. Suguro, Q. ChenK. Sawaya, E. Kudoh, F. Adachi

    2006 IEEE AP-S International Symposium 4573-4576 2006/07

  582. Blocking probability of a DS-CDMA multi-hop virtual cellular network Peer-reviewed

    Lalla Soundous El Alami, Eisuke Kudoh, Fumiyuki Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E89A (7) 1875-1883 2006/07

    DOI: 10.1093/ietfec/e89-a.7.1875  

    ISSN: 0916-8508

    eISSN: 1745-1337

  583. Theoretical performance analysis of downlink site diversity in an MC-CDMA cellular system Peer-reviewed

    A Ali, T Inoue, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (4) 1294-1304 2006/04

    DOI: 10.1093/ietcom/e89-b.4.1294  

    ISSN: 0916-8516

    eISSN: 1745-1345

  584. Joint frequency-domain differential detection and equalization for DS-CDMA signal transmissions in a frequency-selective fading channel Peer-reviewed

    L Liu, F Adachi

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 24 (3) 649-658 2006/03

    DOI: 10.1109/JSAC.2005.862416  

    ISSN: 0733-8716

  585. Bit error rate analysis of OFDM/TDM with frequency-domain equalization Peer-reviewed

    H Gacanin, S Takaoka, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (2) 509-517 2006/02

    DOI: 10.1093/ietcom/e89-b.2.509  

    ISSN: 0916-8516

    eISSN: 1745-1345

  586. Comprehensive evaluation of chip interleaving effect on turbo-coded DS-SS in a Rayleigh fading channel with antenna diversity reception Peer-reviewed

    D Garg, F Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 6 (1) 49-60 2006/02

    DOI: 10.1002/wcm.242  

    ISSN: 1530-8669

  587. MC-CDMA HARQ with Variable Spreading Factor

    Shinsuke Takaoka, Haris Gacanin, Fumiyuki Adachi

    2006 IEEE 63RD VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 2063-2067 2006

    ISSN: 1090-3038

  588. Reduction of Amplitude Clipping Level with OFDM/TDM

    Haris Gacanin, Shinsuke Takaoka, Fumiyuki Adachi

    2006 IEEE 64TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 1558-1562 2006

    ISSN: 2577-2465

  589. Downlink site diversity with frequency-domain equalization for a DS-CDMA cellular system

    Hirotaka Sato, Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    2006 IEEE Singapore International Conference on Communication Systems, ICCS 2006 631-+ 2006

    DOI: 10.1109/ICCS.2006.301489  

  590. MMSE turbo equalization for multicode DS-CDMA

    Kazuaki Takeda, Fumiyuki Adachi

    2006 IEEE Singapore International Conference on Communication Systems, ICCS 2006 626-+ 2006

    DOI: 10.1109/ICCS.2006.301488  

  591. Frequency-domain space-time block coded-joint transmit/receive diversity for the single carrier transmission

    Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    2006 IEEE Singapore International Conference on Communication Systems, ICCS 2006 312-+ 2006

    DOI: 10.1109/ICCS.2006.301425  

  592. Frequency-domain eigenbeam-SDM and equalization for high speed data transmissions

    Kazuyuki Ozaki, Akinori Nakajima, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 1592-1596 2006

    DOI: 10.1109/VTCF.2006.333  

    ISSN: 1550-2252

  593. Iterative overlap FDE for DS-CDMA without GI

    Kazuaki Takeda, Hiromichi Tomeba, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2038-2042 2006

    DOI: 10.1109/VTCF.2006.423  

    ISSN: 1550-2252

  594. MC-CDMA HARQ with variable spreading factor

    Shinsuke Takaoka, Haris Gacanin, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 4 2063-2067 2006

    ISSN: 1550-2252

  595. Chip-interleaved multi-rate CDMA with 2-dimensional OVSF spreading

    Le Liu, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 4 1767-1771 2006

    ISSN: 1550-2252

  596. Space-time block coded joint transmit/receive diversity in a frequency-nonselective Rayleigh fading channel

    Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    IEICE Transactions on Communications E89-B (8) 2189-2195 2006

    Publisher: Institute of Electronics, Information and Communication, Engineers, IEICE

    DOI: 10.1093/ietcom/e89-b.8.2189  

    ISSN: 1745-1345 0916-8516

  597. A relay skipping method for a multi-hop DS-CDMA virtual cellular network Peer-reviewed

    Lalla Soundous El Alami, Eisuke Kudoh, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2534-2538 2006

    DOI: 10.1109/VTCF.2006.522  

    ISSN: 1550-2252

  598. On-demand channel assignment using channel segregation for uplink DS-CDMA multi-hop virtual cellular network Peer-reviewed

    Lalla Soundous El Alami, Eisuke Kudoh, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2 713-717 2006

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/vetecs.2006.1682917  

    ISSN: 1550-2252

  599. Throughput of DS-CDMA HARQ with overlap frequency-domain equalization Peer-reviewed

    Kazuki Takeda, Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    2006 10TH IEEE SINGAPORE INTERNATIONAL CONFERENCE ON COMMUNICATION SYSTEMS, VOLS 1 AND 2 106 (43(RCS2006 18-34)) 432-+ 2006

    ISSN: 0913-5685

  600. Downlink DS-CDMA Transmission with Joint MMSE Equalization and ICI Cancellation Peer-reviewed

    Kazuaki Takeda, Koichi Ishihara, Fumiyuki Adachi

    2006 IEEE 63RD VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 1762-1766 2006

    ISSN: 1090-3038

  601. Chip-interleaved Multi-rate CDMA with 2-dimensional OVSF Spreading Peer-reviewed

    Le Liu, Fumiyuki Adachi

    2006 IEEE 63RD VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 1767-1771 2006

    ISSN: 1090-3038

  602. Frequency-domain Soft Interference Cancellation for Multicode CDMA Transmissions Peer-reviewed

    Koichi Ishihara, Kazuaki Takeda, Fumiyuki Adachi

    2006 IEEE 63RD VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 2523-2527 2006

    ISSN: 1090-3038

  603. Iterative Joint PIC and 2D MMSE-FDE for Turbo-coded HARQ with SC-MIMO Multiplexing Peer-reviewed

    Akinori Nakajima, Fumiyuki Adachi

    2006 IEEE 63RD VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 2503-2507 2006

    ISSN: 1090-3038

  604. Throughput Performance of Iterative Frequency-domain SIC with 2D MMSE-FDE for SC-MIMO Multiplexing Peer-reviewed

    Akinori Nakajima, Fumiyuki Adachi

    2006 IEEE 64TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 105 (559(RCS2005 124-154)) 1680-1684 2006

    ISSN: 1090-3038

  605. On-Demand Channel Assignment Using Channel Segregation for Uplink DS-CDMA Multi-Hop Virtual Cellular Network Peer-reviewed

    Lalla Soundous El Alami, Eisuke Kudoh, Fumiyuki Adachi

    2006 IEEE 63RD VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 713-717 2006

    ISSN: 1090-3038

  606. Joint Frequency-domain Differential Detection and Equalization for 2-dimensional Spread/chip-interleaved DS-CDMA Uplink Transmissions Peer-reviewed

    Le Liu, Fumiyuki Adachi

    2006 IEEE 64TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 1768-1772 2006

    ISSN: 1090-3038

  607. Packet access using DS-CDMA with frequency-domain equalization Peer-reviewed

    D Garg, F Adachi

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 24 (1) 161-170 2006/01

    DOI: 10.1109/JSAC.2005.858899  

    ISSN: 0733-8716

    eISSN: 1558-0008

  608. Frequency-domain pre-equalization for MC-CDMA/TDD uplink and its bit error rate analysis Peer-reviewed

    S Abe, S Takaoka, H Tomeba, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E89B (1) 162-173 2006/01

    DOI: 10.1093/ietcom/e89-b.1.162  

    ISSN: 0916-8516

    eISSN: 1745-1345

  609. HARQ with variable spreading factor for multicode MC-CDMA Peer-reviewed

    S Takaoka, F Adachi

    ELECTRONICS LETTERS 42 (2) 103-105 2006/01

    DOI: 10.1049/el:20063285  

    ISSN: 0013-5194

  610. Performance of DS-CDMA with chip interleaving and frequency domain equalisation in a fading channel Peer-reviewed

    D Garg, F Adachi

    IEE PROCEEDINGS-COMMUNICATIONS 152 (6) 757-764 2005/12

    DOI: 10.1049/ip-com:20045103  

    ISSN: 1350-2425

  611. Transmit power effidency of multi-hop MRC diversity for a virtual cellular network Peer-reviewed

    Daou, I, E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (9) 3643-3648 2005/09

    DOI: 10.1093/ietcom/e88-b.9.3643  

    ISSN: 0916-8516

    eISSN: 1745-1345

  612. Pilot-assisted channel estimation using adaptive interpolation for coherent rake reception of DS-CDMA signals Peer-reviewed

    S Takaoka, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (7) 2962-2970 2005/07

    DOI: 10.1093/ietcom/e88-b.7.2962  

    ISSN: 0916-8516

    eISSN: 1745-1345

  613. Frequency-domain pre-equalization for multicode direct sequence spread spectrum signal iransmission Peer-reviewed

    F Adachi, K Takeda, H Tomeba

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (7) 3078-3081 2005/07

    DOI: 10.1093/ietcom/e88-b.7.3078  

    ISSN: 0916-8516

    eISSN: 1745-1345

  614. Distributed dynamic channel assignment for multi-hop DS-CDMA virtual cellular network Peer-reviewed

    E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (6) 2525-2531 2005/06

    DOI: 10.1093/ietcom.e88-b.6.2525  

    ISSN: 0916-8516

    eISSN: 1745-1345

  615. Frequency-domain differential detection and equalisation of differentially encoded DS-CDMA signals Peer-reviewed

    L Liu, F Adachi

    ELECTRONICS LETTERS 41 (12) 710-712 2005/06

    DOI: 10.1049/el:20050696  

    ISSN: 0013-5194

  616. Orthogonal space-time spreading transmit diversity Peer-reviewed

    S Takaoka, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (5) 2120-2127 2005/05

    DOI: 10.1098/ietcom/e88-b.5.2120  

    ISSN: 0916-8516

    eISSN: 1745-1345

  617. Theoretical study of site selection diversity transmission in DS-CDMA cellular mobile radio Peer-reviewed

    M Alam, E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (5) 2202-2206 2005/05

    DOI: 10.1093/ietcom/e88-b.5.2202  

    ISSN: 0916-8516

    eISSN: 1745-1345

  618. Power and frequency efficient wireless multi-hop virtual cellular concept Peer-reviewed

    E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (4) 1613-1621 2005/04

    DOI: 10.1093/ietcom/e88-b.4.1613  

    ISSN: 0916-8516

    eISSN: 1745-1345

  619. Frequency-domain adaptive prediction iterative channel estimation for OFDM signal reception Peer-reviewed

    S Takaoka, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (4) 1730-1734 2005/04

    DOI: 10.1093/e88-b.4.1730  

    ISSN: 0916-8516

    eISSN: 1745-1345

  620. Broadband CDMA techniques Invited Peer-reviewed

    F Adachi, D Garg, S Takaoka, K Takeda

    IEEE WIRELESS COMMUNICATIONS 12 (2) 8-18 2005/04

    DOI: 10.1109/MWC.2005.1421924  

    ISSN: 1536-1284

  621. Performance evaluation of multi-rate DS-CDMA using frequency-domain equalization in a frequency-selective fading channel Peer-reviewed

    K Takeda, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (3) 1191-1201 2005/03

    DOI: 10.1093/ietcom/e88-b.3.1191  

    ISSN: 0916-8516

    eISSN: 1745-1345

  622. Study on the OVSF code selection for downlink MC-CDMA Peer-reviewed

    T Inoue, D Garg, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (2) 499-508 2005/02

    DOI: 10.1093/ietcom/E88-B.2.499  

    ISSN: 0916-8516

    eISSN: 1745-1345

  623. Pilot-assisted decision feedback channel estimation for STTD in OFDM mobile radio Peer-reviewed

    K Ishihara, K Takeda, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (2) 561-567 2005/02

    DOI: 10.1093/ietcom/E88-B.2.561  

    ISSN: 0916-8516

    eISSN: 1745-1345

  624. Frequency-domain pre-equalization transmit diversity for MC-CDMA uplink transmission Peer-reviewed

    H Tomeba, S Takaoka, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (2) 575-584 2005/02

    DOI: 10.1093/ietcom/E88-B.2.575  

    ISSN: 0916-8516

    eISSN: 1745-1345

  625. A more accurate analysis of interference for rake combining on DS-CDMA forward link in mobile radio Peer-reviewed

    KB Huang, F Adachi, YH Chew

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (2) 654-663 2005/02

    DOI: 10.1093/ietcom/E88-B.2.654  

    ISSN: 0916-8516

    eISSN: 1745-1345

  626. Throughput comparison of turbo-coded HARQ in OFDM, MC-CDMA and DS-CDMA with frequency-domain equalization Peer-reviewed

    D Garg, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (2) 664-677 2005/02

    DOI: 10.1093/ietcom/E88-B.2.664  

    ISSN: 0916-8516

    eISSN: 1745-1345

  627. Frequency-domain pre-rake transmission for DSSS/TDD mobile communications systems Peer-reviewed

    F Adachi, K Takeda, H Tomeba

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (2) 784-787 2005/02

    DOI: 10.1093/ietcom/E88-B.2.784  

    ISSN: 0916-8516

    eISSN: 1745-1345

  628. Frequency-interleaved CDMA uplink transmission using frequency-domain equalization

    Kazuaki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 3 1549-1553 2005

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VETECF.2005.1558201  

    ISSN: 1550-2252

  629. Frequency-domain multi-stage MAI cancellation for DS-CDMA uplink with transmit/receive antenna diversity

    Koichi Ishihara, Kazuaki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 1 78-82 2005

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/VETECF.2005.1557475  

    ISSN: 1550-2252

  630. Pilot-assisted channel estimation for frequency-domain equalization of DSSS signals

    Koichi Ishihara, Kazuaki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 61 (2) 783-787 2005

    ISSN: 1550-2252

  631. Impact of imperfect channel estimation on OFDM/TDM performance

    Shinsuke Takaoka, Haris Gacanin, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 61 (1) 442-446 2005

    ISSN: 1550-2252

  632. Throughput of turbo coded hybrid ARQ using single-carrier MIMO multiplexing

    Akinori Nakajima, Deepshikha Garg, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 61 (1) 610-614 2005

    ISSN: 1550-2252

  633. Throughput comparison of MC-CDMA and DS-CDMA with frequency-domain equalization and adaptive modulation and coding

    Deepshikha Garg, Akinori Nakajima, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 61 (3) 1575-1579 2005

    ISSN: 1550-2252

  634. Multi-antenna pre-equalization for single-carrier/TDD system

    Fumiyuki Adachi, Kazuaki Takeda, Hiromichi Tomeba

    IEEE Vehicular Technology Conference 61 (1) 452-456 2005

    ISSN: 1550-2252

  635. Frequency-domain Pre-equalization transmit diversity for DS-CDMA mobile radio

    Hiromichi Tomeba, Kazuaki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 61 (2) 748-752 2005

    ISSN: 1550-2252

  636. Pilot-assisted channel estimation based on MMSE criterion for DS-CDMA with frequency-domain equalization

    Kazuaki Takeda, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 61 (1) 447-451 2005

    ISSN: 1550-2252

  637. Special section on multi-carrier signal processing techniques for next generation mobile communications - Part 1 Peer-reviewed

    Akihisa Ushirokawa, Seiichi Sampei, Hiroyuki Tsuji, Mitsuru Uesugi, Eisuke Kudoh, Yasunori Iwanami, Hideyuki Uehara, Yasuyuki Oishi, Takeo Ohgane, Tomoaki Ohtsuki, Takashi Ohira, Shigeaki Ogose, Hideki Ochiai, Masaaki Katayama, Akihiro Shibuya, Satoshi Shimizu, Mutsumu Serizawa, Makoto Taromaru, Kazuhiko Fukawa, Toshiyuki Maeyama, Ryu Miura, Kazuo Mori, Yasushi Yamao, Wu Gang, Mamoru Sawahashi, Kei Sakaguchi, Nevio Benvenuto, Yongnam Han, Arne Svensson, Li-Chun Wang, Paul Wittke, Zhou Zheng, Stefan Keiser, Da-Shan Shu, Fumiyuki Adachi

    IEICE Transactions on Communications E88-B (1) 1-2 2005

    Publisher: Institute of Electronics, Information and Communication, Engineers, IEICE

    DOI: 10.1093/ietcom/E88-B.1.1  

    ISSN: 1745-1345 0916-8516

  638. Frequency-domain multi-stage MAI cancellation for DS-CDMA uplink with transmit/receive antenna diversity Peer-reviewed

    K Ishihara, K Takeda, F Adachi

    VTC2005-FALL: 2005 IEEE 62ND VEHICULAR TECHNOLOGY CONFERENCE, 1-4, PROCEEDINGS 78-82 2005

    ISSN: 1090-3038

  639. Space-time block coded-transmit/receive diversity Peer-reviewed

    H Tomeba, K Takeda, F Adachi

    VTC2005-FALL: 2005 IEEE 62ND VEHICULAR TECHNOLOGY CONFERENCE, 1-4, PROCEEDINGS 2020-2024 2005

    ISSN: 1090-3038

  640. Bit error rate analysis of OFDM/TDM with frequency-domain equalization Peer-reviewed

    H Gacanin, S Takaoka, F Adachi

    VTC2005-FALL: 2005 IEEE 62ND VEHICULAR TECHNOLOGY CONFERENCE, 1-4, PROCEEDINGS 559-563 2005

    ISSN: 1090-3038

  641. Frequency-interleaved CDMA uplink transmission using frequency-domain equalization Peer-reviewed

    K Takeda, F Adachi

    VTC2005-FALL: 2005 IEEE 62ND VEHICULAR TECHNOLOGY CONFERENCE, 1-4, PROCEEDINGS 1549-1553 2005

    ISSN: 1090-3038

  642. Transmit power efficiency of multi-hop hybrid selection/MRC diversity for a DS-CDMA virtual cellular network Peer-reviewed

    Daou, I, E Kudoh, F Adachi

    VTC2005-FALL: 2005 IEEE 62ND VEHICULAR TECHNOLOGY CONFERENCE, 1-4, PROCEEDINGS 1383-1387 2005

    ISSN: 1090-3038

  643. Frequency-domain pre-equalization transmit diversity for DS-CDMA mobile radio Peer-reviewed

    H Tomeba, K Takeda, F Adachi

    VTC2005-SPRING: 2005 IEEE 61ST VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5, PROCEEDINGS 748-752 2005

    ISSN: 1090-3038

  644. Multi-antenna pre-equalization for single-carrier/TDD system Peer-reviewed

    F Adachi, K Takeda, H Tomeba

    VTC2005-SPRING: 2005 IEEE 61ST VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5, PROCEEDINGS 452-456 2005

    ISSN: 1090-3038

  645. Pilot-assisted channel estimation based on MMSE criterion for DS-CDMA with frequency-domain equalization Peer-reviewed

    K Takeda, F Adachi

    VTC2005-SPRING: 2005 IEEE 61ST VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5, PROCEEDINGS 447-451 2005

    ISSN: 1090-3038

  646. Diversity-coding-orthogonality trade-off for coded MC-CDMA with high level modulation Peer-reviewed

    D Garg, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (1) 76-83 2005/01

    DOI: 10.1093/ietcom/E88-B.1.76  

    ISSN: 0916-8516

    eISSN: 1745-1345

  647. Frequency-domain equalization for MC-CDMA downlink site diversity and performance evaluation Peer-reviewed

    T Inoue, S Takaoka, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E88B (1) 84-92 2005/01

    DOI: 10.1093/ietcom/E88-B.1.84  

    ISSN: 0916-8516

    eISSN: 1745-1345

  648. Iterative adaptive soft parallel interference canceller for turbo coded MIMO multiplexing Peer-reviewed

    A Nakajima, D Garg, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (12) 3813-3819 2004/12

    ISSN: 0916-8516

    eISSN: 1745-1345

  649. Application of space-time transmit diversity to single-carrier transmission with frequency-domain equalisation and receive antenna diversity in a frequency-selective fading channel Peer-reviewed

    K Takeda, T Itagaki, F Adachi

    IEE PROCEEDINGS-COMMUNICATIONS 151 (6) 627-632 2004/12

    DOI: 10.1049/ip-com:20040624  

    ISSN: 1350-2425

  650. Bit error rate analysis of DS-CDMA with joint frequency-domain equalization and antenna diversity combining Peer-reviewed

    F Adachi, K Takeda

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (10) 2991-3002 2004/10

    ISSN: 0916-8516

    eISSN: 1745-1345

  651. Application of random transmit power control to DS-CDMA.TDD packet mobile radio Peer-reviewed

    ZS Wang, E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (10) 3144-3149 2004/10

    ISSN: 0916-8516

    eISSN: 1745-1345

  652. Application of rate compatible punctured turbo coded hybrid ARQ to MC-CDMA mobile radio Peer-reviewed

    D Garg, F Adachi

    ETRI JOURNAL 26 (5) 405-412 2004/10

    DOI: 10.4218/etrij.04.0703.0003  

    ISSN: 1225-6463

    eISSN: 2233-7326

  653. Performance comparison of delay transmit diversity and frequency-domain space-time coded transmit diversity for orthogonal multicode DS-CDMA signal reception using frequency-domain equalization Peer-reviewed

    T Itagaki, K Takeda, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (9) 2719-2728 2004/09

    ISSN: 0916-8516

    eISSN: 1745-1345

  654. Multipath fading simulator based on distributed scattering model Peer-reviewed

    H Okuni, E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (8) 2422-2426 2004/08

    ISSN: 0916-8516

    eISSN: 1745-1345

  655. Joint use of frequency-domain equalization and transmit/receive antenna diversity for single-carrier transmissions Peer-reviewed

    K Takeda, T Itagaki, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (7) 1946-1953 2004/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  656. Joint frequency-domain equalization and antenna diversity combining for orthogonal multicode DS-CDMA signal transmissions in a frequency-selective fading channel Peer-reviewed

    T Itagaki, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (7) 1954-1963 2004/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  657. Impact of shadowing correlation on spectrum efficiency of a power controlled cellular system Peer-reviewed

    K Sawa, E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (7) 1964-1969 2004/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  658. A study on optimum weights for delay transmit diversity for DS-CDMA in a frequency non-selective fading channel Peer-reviewed

    A Katoh, E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (4) 838-848 2004/04

    ISSN: 0916-8516

    eISSN: 1745-1345

  659. Joint space-time transmit diversity and minimum mean square error equalization for MC-CDMA with antenna diversity reception Peer-reviewed

    D Garg, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (4) 849-857 2004/04

    ISSN: 0916-8516

    eISSN: 1745-1345

  660. Impact of arrival angle spread of each cluster of irresolvable paths on adaptive antenna array and antenna diversity in DS-CDMA mobile radio Peer-reviewed

    Y Suzuki, E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (4) 1037-1040 2004/04

    ISSN: 0916-8516

    eISSN: 1745-1345

  661. A general SER formula for an OFDM system with MDPSK in frequency domain over Rayleigh fading channels Peer-reviewed

    K Zhong, TT Tjhung, F Adachi

    IEEE TRANSACTIONS ON COMMUNICATIONS 52 (4) 584-594 2004/04

    DOI: 10.1109/TCOMM.2004.826342  

    ISSN: 0090-6778

    eISSN: 1558-0857

  662. Frequency-domain channel estimation using FFT/IFFT for DS-CDMA mobile radio

    Shinsuke Takaoka, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 60 (1) 694-698 2004

    ISSN: 1550-2252

  663. Performance comparison of turbo-coded DS-CDMA, MC-CDMA and OFDM with frequency-domain equalization and higher-level modulation

    Deepshikha Garg, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 60 (3) 2282-2286 2004

    ISSN: 1550-2252

  664. Turbo coded MIMO multiplexing with iterative adaptive soft parallel interference cancellation

    Akinori Nakajima, Deepshikha Garg, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 60 (2) 1410-1414 2004

    ISSN: 1550-2252

  665. DS-CDMA with frequency-domain equalization for high speed downlink packet access

    Deepshikha Garg, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 60 (1) 689-693 2004

    ISSN: 1550-2252

  666. Pilot-assisted adaptive interpolation channel estimation for OFDM signal reception

    Shinsuke Takaoka, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 59 (3) 1777-1781 2004

    ISSN: 1550-2252

  667. Combined effect of chip interleaving and frequency domain equalization for DS-CDMA

    Deepshikha Garg, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 59 (1) 435-439 2004

    ISSN: 1550-2252

  668. Generalized OFDM for bridging between OFDM and single-carrier transmission

    Haris Gacanin, Shinsuke Takaoka, Fumiyuki Adachi

    2004 9th IEEE Singapore International Conference on Communication Systems, ICCS 145-149 2004

  669. On equivalence of channel estimation with transform and without transform for multicarrier signals

    Shinsuke Takaoka, Fumiyuki Adachi

    2004 9th IEEE Singapore International Conference on Communication Systems, ICCS 431-435 2004

  670. Comparison of RCPT HARQ throughput using OFDM, MC-CDMA and DS-CDMA with frequency-domain equalization

    Deepshikha Garg, Fumiyuki Adachi

    2004 9th IEEE Singapore International Conference on Communication Systems, ICCS 60-64 2004

  671. Distributed dynamic channel assignment for a multi-hop virtual cellular system Peer-reviewed

    E Kudoh, F Adachi

    VTC2004-SPRING: 2004 IEEE 59TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5, PROCEEDINGS 103 (458(AP2003 209-227)) 2286-2290 2004

    ISSN: 0913-5685

  672. Inter-chip interference cancellation for DS-CDMA with frequency-domain equalization Peer-reviewed

    K Takeda, F Adachi

    VTC2004-FALL: 2004 IEEE 60TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-7 2316-2320 2004

  673. Impact of frequency-selective fading on distributed dynamic channel assignment in a DS-CDMA multi-hop virtual cellular network Peer-reviewed

    E Kudoh, F Adachi

    VTC2004-FALL: 2004 IEEE 60TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-7 3481-3485 2004

  674. MMSE frequency-domain equalization combined with space-time transmit diversity and antenna receive diversity for DS-CDMA Peer-reviewed

    K Takeda, F Adachi

    VTC2004-SPRING: 2004 IEEE 59TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5, PROCEEDINGS 464-468 2004

  675. Chip interleaved multicode DS-CDMA with MMSEC in a fading channel Peer-reviewed

    T Itagaki, T Sao, D Garg, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E87B (1) 79-87 2004/01

    ISSN: 0916-8516

    eISSN: 1745-1345

  676. The overview of the new generation mobile communication system and the role of software defined radio technology Peer-reviewed

    H Harada, M Kuroda, H Morikawa, H Wakana, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (12) 3374-3384 2003/12

    ISSN: 0916-8516

    eISSN: 1745-1345

  677. Joint antenna diversity and frequency-domain equalization for multi-rate MC-CDMA Peer-reviewed

    F Adachi, T Sao

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (11) 3217-3224 2003/11

    ISSN: 0916-8516

    eISSN: 1745-1345

  678. On received signal power distribution of wideband signals in a frequency-selective Rayleigh fading channel Peer-reviewed

    F Adachi, A Kato

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (11) 3340-3343 2003/11

    ISSN: 0916-8516

    eISSN: 1745-1345

  679. Frequency-domain rake combining for antenna diversity reception of DS-CDMA signals Peer-reviewed

    F Adachi, T Itagaki

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (9) 2781-2784 2003/09

    ISSN: 0916-8516

    eISSN: 1745-1345

  680. Theoretical analysis of MC-CDMA forward link performance in the presence of pure impulsive interference Peer-reviewed

    E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (8) 2425-2432 2003/08

    ISSN: 1745-1345

  681. Uplink link capacity of DS-CDMA packet mobile communications with rake combining and transmit power control Peer-reviewed

    ZS Wang, E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (7) 2203-2206 2003/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  682. A weighted delay transmit diversity system combined with antenna diversity reception for DS-CDMA mobile radio Peer-reviewed

    A Kato, E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (7) 2211-2215 2003/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  683. CRL's R&D activity towards beyond 3G era - New generation mobile network project Peer-reviewed

    Masugi Inoue, Masahiro Kuroda, Hiroyuki Morikawa, Masayuki Fujise, Hiroshi Harada, Hiroyo Ogawa, Hiromitsu Wakana, Fumiyuki Adachi

    2003 International Conference on Communication Technology, VOL 1-2, vol.1 1-4 2003/04

    DOI: 10.1109/icct.2003.1208996  

  684. Comparative study of iterative channel estimation schemes for turbo decoding with antenna diversity reception in Rayleigh fading Peer-reviewed

    R Kimura, D Garg, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (3) 1149-1152 2003/03

    ISSN: 0916-8516

    eISSN: 1745-1345

  685. Effect of transmit power limitation in power controlled DS-CDMA Peer-reviewed

    A Katoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (2) 757-768 2003/02

    ISSN: 0916-8516

    eISSN: 1745-1345

  686. Modeling of DS-CDMA transmit power control in a fast fading channel with antenna diversity Peer-reviewed

    A Katoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (2) 769-776 2003/02

    ISSN: 0916-8516

    eISSN: 1745-1345

  687. Comparison of OFDM and multicode MC-CDMA in frequency selective fading channel Peer-reviewed

    R Kimura, F Adachi

    ELECTRONICS LETTERS 39 (3) 317-318 2003/02

    DOI: 10.1049/el:20030191  

    ISSN: 0013-5194

  688. Transmit power efficiency of a multi-hop virtual cellular system

    Eisuke Kudoh, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 58 (5) 2910-2914 2003

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI: 10.1109/vetecf.2003.1286156  

    ISSN: 0740-0551

  689. Rate compatible punctured turbo-coded hybrid ARQ for OFDM in a frequency selective fading channel

    Deepshikha Garg, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 57 (4) 2725-2729 2003

    ISSN: 0740-0551

  690. Throughput of RCPT hybrid ARQ for DS-CDMA with diversity reception and rake combining

    Deepshikha Garg, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 57 (4) 2730-2734 2003

    ISSN: 0740-0551

  691. Transmit power efficiency of a multi-hop virtual cellular system Peer-reviewed

    E Kudoh, F Adachi

    2003 IEEE 58TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS1-5, PROCEEDINGS 2910-2914 2003

    ISSN: 1090-3038

  692. Power and frequency efficient virtual cellular network Peer-reviewed

    E Kudoh, F Adachi

    57TH IEEE VEHICULAR TECHNOLOGY CONFERENCE, VTC 2003-SPRING, VOLS 1-4, PROCEEDINGS 2485-2489 2003

    ISSN: 1090-3038

  693. Field experiments on pilot symbol-assisted coherent multistage interference canceller in DS-CDMA reverse link Peer-reviewed

    K Higuchi, K Okawa, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (1) 181-190 2003/01

    ISSN: 0916-8516

    eISSN: 1745-1345

  694. Comparative study of various frequency equalization techniques for downlink of a wireless OFDM-CDMA system Peer-reviewed

    T Sao, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E86B (1) 352-364 2003/01

    ISSN: 0916-8516

    eISSN: 1745-1345

  695. RCPT hybrid ARQ with limited number of retransmissions in DS-CDMA mobile radio Peer-reviewed

    D Garg, R Kimura, F Adachi

    ELECTRONICS LETTERS 39 (2) 241-242 2003/01

    DOI: 10.1049/el:20030177  

    ISSN: 0013-5194

  696. Performance of multicode DS-CDMA using frequency domain equalisation in frequency selective fading channel Peer-reviewed

    F Adachi, T Sao, T Itagaki

    ELECTRONICS LETTERS 39 (2) 239-241 2003/01

    DOI: 10.1049/el:20030160  

    ISSN: 0013-5194

  697. Experimental evaluation of high rate data transmission using turbo/convolutional coding in W-CDMA mobile communications Peer-reviewed

    K Higuchi, T Ikeda, S Fukumoto, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (12) 2750-2759 2002/12

    ISSN: 0916-8516

    eISSN: 1745-1345

  698. Pilot-aided threshold detection combining for OFDM-CDMA down link transmissions in a frequency selective fading channel Peer-reviewed

    T Sao, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (12) 2816-2827 2002/12

    ISSN: 0916-8516

    eISSN: 1745-1345

  699. Analysis of DS-CDMA transmission performance in the presence of pure impulsive interference over frequency selective fading Peer-reviewed

    E Kudoh, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (11) 2395-2404 2002/11

    ISSN: 0916-8516

    eISSN: 1745-1345

  700. Adaptive prediction iterative channel estimation for combined antenna diversity and coherent rake reception of multipath-faded DSSS signals Peer-reviewed

    S Takaoka, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (11) 2405-2415 2002/11

    ISSN: 0916-8516

    eISSN: 1745-1345

  701. Reverse link capacity of orthogonal multi-code DS-CDMA with multiple connections Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (11) 2522-2526 2002/11

    ISSN: 0916-8516

    eISSN: 1745-1345

  702. Capacity expressions for power-controlled multi-class DS-CDMA reverse link with antenna diversity and rake combining Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (9) 1854-1859 2002/09

    ISSN: 0916-8516

    eISSN: 1745-1345

  703. Hybrid data transmission technique for multimedia satellite broadcasting Peer-reviewed

    M Hamada, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (8) 1463-1468 2002/08

    ISSN: 0916-8516

    eISSN: 1745-1345

  704. Pilot-aided adaptive prediction channel estimation in a frequency-nonselective fading channel Peer-reviewed

    S Takaoka, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (8) 1552-1560 2002/08

    ISSN: 0916-8516

    eISSN: 1745-1345

  705. Experimental evaluation of three-step cell search method in W-CDMA mobile communications Peer-reviewed

    K Higuchi, Y Hanada, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E85A (7) 1511-1523 2002/07

    ISSN: 0916-8508

    eISSN: 1745-1337

  706. Experiments on adaptive antenna array transmit diversity in W-CDMA forward link Peer-reviewed

    A Harada, S Tanaka, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E85A (7) 1612-1623 2002/07

    ISSN: 0916-8508

    eISSN: 1745-1337

  707. Chip interleaved turbo codes for DS-CDMA mobile radio in fading channel Peer-reviewed

    D Garg, F Adachi

    ELECTRONICS LETTERS 38 (13) 642-644 2002/06

    DOI: 10.1049/el:20020455  

    ISSN: 0013-5194

  708. Joint effect of transmit power control and antenna diversity on spectrum efficiency of a cellular system Peer-reviewed

    F Adachi, A Katoh, D Garg

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (5) 919-928 2002/05

    ISSN: 0916-8516

    eISSN: 1745-1345

  709. Reverse link bandwidth efficiency of a spectrally overlapped CDMA system Peer-reviewed

    DK Kim, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (4) 758-768 2002/04

    ISSN: 0916-8516

    eISSN: 1745-1345

  710. Experiments on pilot symbol-assisted coherent multistage interference canceller for DS-CDMA mobile radio Peer-reviewed

    M Sawahashi, K Higuchi, H Andoh, F Adachi

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 20 (2) 433-449 2002/02

    DOI: 10.1109/49.983369  

    ISSN: 0733-8716

  711. Chip interleaved turbo codes for DS-CDMA in a Rayleigh fading channel with diversity reception

    Deepshikha Garg, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 56 (3) 1777-1781 2002

    ISSN: 0740-0551

  712. Time- and frequency-domain expressions for Rake combiner output SNR Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E85B (1) 340-342 2002/01

    ISSN: 0916-8516

    eISSN: 1745-1345

  713. Multistage recursive interleaver for turbo codes in DS-CDMA mobile radio Peer-reviewed

    A Shibutani, H Suda, F Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 51 (1) 88-100 2002/01

    DOI: 10.1109/25.992070  

    ISSN: 0018-9545

  714. Space diversity reception and parallel blind equalization in short-burst TDMA systems Peer-reviewed

    HY Qian, TT Tjhung, P He, F Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 51 (1) 122-129 2002/01

    DOI: 10.1109/25.992073  

    ISSN: 0018-9545

    eISSN: 1939-9359

  715. Experiments on space time block coding transmit diversity (STTD) in W-CDMA forward link Peer-reviewed

    S Fukumoto, K Higuchi, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E84A (12) 3045-3057 2001/12

    ISSN: 0916-8508

    eISSN: 1745-1337

  716. Experiments on inter-sector diversity using maximal ratio combining in W-CDMA reverse link Peer-reviewed

    A Morimoto, K Higuchi, S Fukumoto, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E84A (12) 3012-3025 2001/12

    ISSN: 0916-8508

    eISSN: 1745-1337

  717. Performance analysis of closed-loop like power control for packet transmission over DS-CDMA in a multipath fading environment Peer-reviewed

    DK Kim, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E84B (9) 2635-2643 2001/09

    ISSN: 0916-8516

    eISSN: 1745-1345

  718. Fast two-step beam tracking algorithm of coherent adaptive antenna array diversity receiver in W-CDMA reverse link Peer-reviewed

    T Ihara, S Tanaka, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E84B (7) 1835-1848 2001/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  719. Outer loop control of fast transmit power control based on intermediate block error rate in concatenated channel coding for DS-CDMA mobile radio Peer-reviewed

    K Okawa, K Higuchi, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E84A (7) 1691-1701 2001/07

    ISSN: 0916-8508

    eISSN: 1745-1337

  720. Improvements in W-CDMA: principles and experimental results Peer-reviewed

    M Sawahashi, K Higuchi, S Tanaka, F Adachi

    ANNALES DES TELECOMMUNICATIONS-ANNALS OF TELECOMMUNICATIONS 56 (5-6) 236-259 2001/05

    ISSN: 0003-4347

  721. Performance of coherent multi-carrier/DS-CDMA and MC-CDMA for broadband packet wireless access Peer-reviewed

    S Abeta, H Atarashi, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E84B (3) 406-414 2001/03

    ISSN: 0916-8516

    eISSN: 1745-1345

  722. Experimental evaluation of coherent Rake combining for broadband single-carrier DS-CDMA wireless communications Peer-reviewed

    T Ikeda, K Okawa, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E84B (3) 415-424 2001/03

    ISSN: 0916-8516

    eISSN: 1745-1345

  723. Combined effect of coherent adaptive antenna array diversity and SINR-based fast transmit power control in W-CDMA reverse link Peer-reviewed

    S Tanaka, A Harada, T Ihara, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E84B (3) 425-434 2001/03

    ISSN: 0916-8516

    eISSN: 1745-1345

  724. Experiments on inter-cell site diversity using two-step selection combining in W-CDMA reverse link Peer-reviewed

    A Morimoto, K Higuchi, S Fukumoto, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E84B (3) 435-445 2001/03

    ISSN: 0916-8516

    eISSN: 1745-1345

  725. Tapped delay line model for band-limited multipath channel in DS-CDMA mobile radio Peer-reviewed

    F Adachi, TT Tjhung

    ELECTRONICS LETTERS 37 (5) 318-319 2001/03

    DOI: 10.1049/el:20010213  

    ISSN: 0013-5194

  726. Theoretical analysis of reverse link capacity for an SIR-based power-controlled cellular CDMA system in a multipath fading environment Peer-reviewed

    DK Kim, F Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 50 (2) 452-464 2001/03

    DOI: 10.1109/25.923057  

    ISSN: 0018-9545

  727. Evaluation of reverse-link capacity of a DS-CDMA system with power control and diversity reception Peer-reviewed

    D Lyu, H Suda, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E84B (2) 238-244 2001/02

    ISSN: 0916-8516

    eISSN: 1745-1345

  728. Wireless past and future - Evolving mobile communications systems Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E84A (1) 55-60 2001/01

    ISSN: 0916-8508

    eISSN: 1745-1337

  729. Enhanced wireless access technologies and experiments for W-CDMA communications Peer-reviewed

    M Sawahashi, K Higuchi, S Tanaka

    IEEE PERSONAL COMMUNICATIONS 7 (6) 6-16 2000/12

    DOI: 10.1109/98.892253  

    ISSN: 1070-9916

  730. Experimental evaluations on array antenna configuration of adaptive antenna array diversity receiver in W-CDMA reverse link Peer-reviewed

    T Ihara, S Tanaka, A Harada, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E83A (11) 2120-2128 2000/11

    ISSN: 0916-8508

    eISSN: 1745-1337

  731. Path search performance and its parameter optimization of pilot symbol-assisted coherent Rake receiver for W-CDMA mobile radio Peer-reviewed

    S Fukumoto, K Okawa, K Higuchi, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E83A (11) 2110-2119 2000/11

    ISSN: 0916-8508

    eISSN: 1745-1337

  732. Experiments on fast cell search algorithm using scrambling code masking for inter-cell asynchronous W-CDMA system Peer-reviewed

    K Higuchi, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E83A (11) 2102-2109 2000/11

    ISSN: 0916-8508

    eISSN: 1745-1337

  733. Experiments on coherent adaptive antenna array diversity for wideband DS-CDMA mobile radio Peer-reviewed

    S Tanaka, A Harada, M Sawahashi, F Adachi

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 18 (8) 1495-1504 2000/08

    DOI: 10.1109/49.864013  

    ISSN: 0733-8716

  734. Experimental evaluation of combined effect of coherent rake combining and SIR-based fast transmit power control for reverse link of DS-CDMA mobile radio Peer-reviewed

    K Higuchi, H Andoh, K Okawa, M Sawahashi, F Adachi

    IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 18 (8) 1526-1535 2000/08

    DOI: 10.1109/49.864016  

    ISSN: 0733-8716

  735. Fast cell search algorithm in idle mode for inter-cell asynchronous W-CDMA mobile radio Peer-reviewed

    Y Hanada, K Higuchi, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E83B (8) 1610-1618 2000/08

    ISSN: 0916-8516

    eISSN: 1745-1345

  736. Experiments on 2-Mbps data transmission applying antenna diversity reception over 5-MHz W-CDMA mobile radio link Peer-reviewed

    K Okawa, S Fukumoto, K Higuchi, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E83B (8) 1602-1609 2000/08

    ISSN: 0916-8516

    eISSN: 1745-1345

  737. Capacity estimation for overlaid multiband CDMA systems with SIR-based power control Peer-reviewed

    DK Kim, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E83B (7) 1454-1464 2000/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  738. BER performance of OFDM-MDPSK system in frequency-selective Rician fading with diversity reception Peer-reviewed

    J Lu, TT Tjhung, F Adachi, CL Huang

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 49 (4) 1216-1225 2000/07

    DOI: 10.1109/25.875231  

    ISSN: 0018-9545

  739. Challenges of wireless communications - IMT-2000 and beyond Peer-reviewed

    F Adachi, N Nakajima

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E83A (7) 1300-1307 2000/07

    ISSN: 0916-8508

    eISSN: 1745-1337

  740. Effect of transmission probability on reverse-link capacity in DS-CDMA cellular mobile radio Peer-reviewed

    K. Hirohashi, H. Suda, F. Adachi, H. Yamamoto

    IEICE Trans. B J83-B (6) 918-922 2000/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1344-4697

  741. Combined effect of coherent adaptive antenna array diversity receiver and fast transmit power control in W-CDMA reverse link

    S. Tanaka, A. Harada, T. Ihara, M. Sawahashi, F. Adachi

    IEEE Vehicular Technology Conference 3 2147-2151 2000

    Publisher: IEEE

    ISSN: 0740-0551

  742. Fast antenna-weights tracking algorithm of adaptive antenna array diversity receiver in W-CDMA reverse link

    Taisuke Ihara, Shinya Tanaka, Mamoru Sawahashi, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2 961-965 2000

    Publisher: IEEE

    ISSN: 0740-0551

  743. Experimental evaluation of 3-step cell search method in W-CDMA mobile radio

    Kenichi Higuchi, Yukiko Hanada, Mamoru Sawahashi, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 1 303-307 2000

    Publisher: IEEE

    ISSN: 0740-0551

  744. Experimental evaluation of coherent rake receiver for broadband DS-CDMA mobile radio

    Takehiro Ikeda, Koichi Okawa, Mamoru Sawahashi, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 3 1849-1853 2000

    Publisher: IEEE

    ISSN: 0740-0551

  745. Field experiments on closed loop mode transmit diversity in W-CDMA forward link

    S. Fukumoto, K. Higuchi, M. Sawahashi, F. Adachi

    IEEE International Symposium on Spread Spectrum Techniques and Applications 2 433-438 2000

  746. Combined effect of site diversity and fast transmit power control in W-CDMA mobile radio

    S. Fukumoto, K. Higuchi, A. Morimoto, M. Sawahashi, F. Adachi

    IEEE Vehicular Technology Conference 1 138-142 2000

    Publisher: IEEE

    ISSN: 0740-0551

  747. Coherent multicarrier/DS-CDMA and MC-CDMA for broadband packet wireless access

    Sadayuki Abeta, Hiroyuki Atarashi, Mamoru Sawahashi, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 3 1918-1922 2000

    Publisher: IEEE

    ISSN: 0740-0551

  748. IMT-2000 - Challenges of wireless millennium Peer-reviewed

    F Adachi, M Sawahashi

    WIRELESS COMMUNICATION TECHNOLOGIES: NEW MULTIMEDIA SYSTEMS 564 263-293 2000

  749. Iterative decision-directed path search and channel estimation for multi-carrier/DS-CDMA broadband packet wireless access Peer-reviewed

    H Atarashi, S Abeta, M Sawahashi, F Adachi

    2000 IEEE 51ST VEHICULAR TECHNOLOGY CONFERENCE, PROCEEDINGS, VOLS 1-3 420-424 2000

  750. Capacity evaluation of a forward link DS-CDMA cellular system with fast TPC based on SIR Peer-reviewed

    D Lyu, H Suda, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E83B (1) 68-76 2000/01

    ISSN: 0916-8516

    eISSN: 1745-1345

  751. Effect of fast transmit power control on forward link capacity of DS-CDMA cellular mobile radio Peer-reviewed

    F Kikuchi, H Suda, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E83B (1) 47-55 2000/01

    ISSN: 0916-8516

    eISSN: 1745-1345

  752. Interference suppression factor in DS-CDMA systems Peer-reviewed

    F Adachi, DK Kim

    ELECTRONICS LETTERS 35 (25) 2176-2177 1999/12

    DOI: 10.1049/el:19991492  

    ISSN: 0013-5194

  753. Effect of spreading bandwidth on DS-CDMA reverse link capacity Peer-reviewed

    H Suda, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E82B (12) 2160-2163 1999/12

    ISSN: 0916-8516

    eISSN: 1745-1345

  754. Adaptive channel estimation for coherent DS-CDMA mobile radio using time-multiplexed pilot and parallel pilot structures Peer-reviewed

    S Abeta, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E82B (9) 1505-1513 1999/09

    ISSN: 0916-8516

    eISSN: 1745-1345

  755. BER analysis of 2PSK, 4PSK, and 16QAM with decision feedback channel estimation in frequency-selective slow Rayleigh fading Peer-reviewed

    F Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 48 (5) 1563-1572 1999/09

    DOI: 10.1109/25.790531  

    ISSN: 0018-9545

  756. A fast transmit power control based on Markov transition for DS-CDMA mobile radio Peer-reviewed

    H Suda, H Kawai, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E82B (8) 1353-1362 1999/08

    ISSN: 0916-8516

    eISSN: 1745-1345

  757. Experiments on fast cell search algorithm for intercell asynchronous W-CDMA mobile radio Peer-reviewed

    K Higuchi, M Sawahashi, F Adachi

    ELECTRONICS LETTERS 35 (13) 1046-1047 1999/06

    DOI: 10.1049/el:19990769  

    ISSN: 0013-5194

  758. Reducing average number of turbo decoding iterations Peer-reviewed

    A Shibutani, H Suda, F Adachi

    ELECTRONICS LETTERS 35 (9) 701-702 1999/04

    DOI: 10.1049/el:19990470  

    ISSN: 0013-5194

  759. Outer-loop control of target SIR for fast transmit power control in turbo-coded W-CDMA mobile radio Peer-reviewed

    H Kawai, H Suda, F Adachi

    ELECTRONICS LETTERS 35 (9) 699-701 1999/04

    DOI: 10.1049/el:19990481  

    ISSN: 0013-5194

  760. W-CDMA: performance evaluation and future enhancement Invited Peer-reviewed

    F. Adachi, M. Sawahashi, H. Suda

    Proc. 3rd European Personal Mobile Communications Conference (EPMCC’99) 429-434 1999/03

  761. Adaptive antenna array in W-CDMA mobile radio Peer-reviewed

    F. Adachi, M. Sawahashi, S. Tanaka

    Proc. Smart Antenna Workshop for 3G mobile Communications 49-64 1999/01/19

  762. Adaptive reduced state-transition Viterbi differential detection of M-ary DPSK signals transmitted over Gaussian and frequency nonselective Rayleigh faded channels Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E82B (1) 156-164 1999/01

    ISSN: 0916-8516

    eISSN: 1745-1345

  763. Turbo codes application to DS-CDMA mobile radio Peer-reviewed

    A Fujiwara, H Suda, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E81A (11) 2269-2273 1998/11

    ISSN: 0916-8508

    eISSN: 1745-1337

  764. Experiment on coherent adaptive antenna array for wideband DS-CDMA mobile radio Peer-reviewed

    S Tanaka, A Harada, M Sawahashi, F Adachi

    ELECTRONICS LETTERS 34 (23) 2204-2205 1998/11

    DOI: 10.1049/el:19981579  

    ISSN: 0013-5194

  765. Promising techniques to enhance radio link performance of wideband wireless access based on DS-CDMA Peer-reviewed

    F Adachi, M Sawahashi, H Suda

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E81A (11) 2242-2250 1998/11

    ISSN: 0916-8508

    eISSN: 1745-1337

  766. Wideband DS-CDMA for next-generation mobile communications systems Peer-reviewed

    F Adachi, M Sawahashi, H Suda

    IEEE COMMUNICATIONS MAGAZINE 36 (9) 56-69 1998/09

    DOI: 10.1109/35.714618  

    ISSN: 0163-6804

  767. Adaptive differential detection using linear prediction for M-ary DPSK Peer-reviewed

    F Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 47 (3) 909-918 1998/08

    DOI: 10.1109/25.704844  

    ISSN: 0018-9545

  768. Error probability analysis for 16 STAR-QAM in frequency-selective Rician fading with diversity reception Peer-reviewed

    XD Dong, TT Tjhung, F Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 47 (3) 924-935 1998/08

    DOI: 10.1109/25.704846  

    ISSN: 0018-9545

  769. 1.92 Mbps data transmission experiments over a coherent W-CDMA radio link Peer-reviewed

    K Okawa, Y Okumura, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (7) 1330-1336 1998/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  770. Variable-rate data transmission with blind rate detection for coherent DS-CDMA mobile radio Peer-reviewed

    Y Okumura, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (7) 1365-1373 1998/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  771. Matched filter-based RAKE combiner for wideband DS-CDMA mobile radio Peer-reviewed

    S Fukumoto, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (7) 1384-1391 1998/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  772. Performance comparison between time-multiplexed pilot channel and parallel pilot channel for coherent rake combining in DS-CDMA mobile radio Peer-reviewed

    S Abeta, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (7) 1417-1425 1998/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  773. Coherent delay-locked code tracking loop using time-multiplexed pilot for DS-CDMA mobile radio Peer-reviewed

    M Sawahashi, F Adachi, H Yamamoto

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (7) 1426-1432 1998/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  774. SIR-based transmit power control of reverse link for coherent DS-CDMA mobile radio Peer-reviewed

    S Seo, T Dohi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (7) 1508-1516 1998/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  775. Channel estimation filter using time-multiplexed pilot channel for coherent RAKE combining in DS-CDMA mobile radio Peer-reviewed

    H Andoh, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (7) 1517-1526 1998/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  776. Fast cell search algorithm in inter-cell asynchronous DS-CDMA mobile radio Peer-reviewed

    K Higuchi, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (7) 1527-1534 1998/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  777. Wideband wireless access based on DS-CDMA Peer-reviewed

    F Adachi, M Sawahashi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (7) 1305-1316 1998/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  778. Further results on field experiments of coherent wideband DS-CDMA mobile radio Peer-reviewed

    T Dohi, Y Okumura, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (6) 1239-1247 1998/06

    ISSN: 0916-8516

    eISSN: 1745-1345

  779. Orthogonal forward link using orthogonal multi-spreading factor codes for coherent DS-CDMA mobile radio Peer-reviewed

    K Okawa, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E81B (4) 777-784 1998/04

    ISSN: 0916-8516

    eISSN: 1745-1345

  780. Experiments on coherent multistage interference canceller for DS-CDMA mobile radio

    M. Sawahashi, H. Andoh, K. Higuchi, F. Adachi

    IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2 491-496 1998

    Publisher: IEEE

  781. 1.92 Mbps data transmission experiments over a coherent W-CDMA mobile radio link

    Koichi Okawa, Yukihiko Okumura, Mamoru Sawahashi, Fumiyuki Adachi

    IEEE Vehicular Technology Conference 2 1300-1304 1998

    Publisher: IEEE

    ISSN: 0740-0551

  782. A fast transmit power control based on Markov transition for DS-CDMA mobile radio Peer-reviewed

    H Suda, H Kawai, S Sasaki, F Adachi

    ICUPC &apos;98 - IEEE 1998 INTERNATIONAL CONFERENCE ON UNIVERSAL PERSONAL COMMUNICATIONS, VOLS 1 AND 2 1-2 235-239 1998

    ISSN: 1091-8442

  783. Transmit power efficiency of fast transmit power controlled DS-CDMA reverse link Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E80A (12) 2420-2428 1997/12

    ISSN: 0916-8508

    eISSN: 1745-1337

  784. Pilot symbol-assisted decision-directed coherent adaptive array diversity for DS-CDMA mobile radio reverse link Peer-reviewed

    S Tanaka, M Sawahashi, F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E80A (12) 2445-2454 1997/12

    ISSN: 0916-8508

    eISSN: 1745-1337

  785. On diversity reception of narrowband 16 STAR-QAM in fast Rician fading Peer-reviewed

    TT Tjhung, XD Dong, F Adachi, KH Tan

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 46 (4) 923-932 1997/11

    DOI: 10.1109/25.653066  

    ISSN: 0018-9545

    eISSN: 1939-9359

  786. Effects of orthogonal spreading and rake combining on DS-CDMA forward link in mobile radio Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E80B (11) 1703-1712 1997/11

    ISSN: 0916-8516

    eISSN: 1745-1345

  787. Variable rate transmission and blind rate detection for coherent DS-CDMA mobile radio Peer-reviewed

    Y Okumura, F Adachi

    ELECTRONICS LETTERS 33 (24) 2026-2027 1997/11

    DOI: 10.1049/el:19971402  

    ISSN: 0013-5194

  788. Rake combining effect on link capacity and peak transmit power of power-controlled reverse link of DS-CDMA cellular mobile radio Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E80B (10) 1547-1555 1997/10

    ISSN: 0916-8516

    eISSN: 1745-1345

  789. Phase-combining diversity using adaptive decision-aided branch-weight estimation for reception of faded M-ary DPSK signals Peer-reviewed

    F Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 46 (3) 786-790 1997/08

    DOI: 10.1109/25.618203  

    ISSN: 0018-9545

  790. Experimental evaluation of 96 multicarrier 16 QAM radio transmission using pilot symbol-assisted coherent detection Peer-reviewed

    M. Sawahashi, F. Adachi

    IEICE Trans. Commun. J80-B-II (8) 663-674 1997/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0915-1885

  791. Adaptive maximum likelihood detection of MPSK signals in frequency nonselective fast Rayleigh fading Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E80B (7) 1045-1054 1997/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  792. Performance analysis of approximate ML detection of MPSK signals transmitted over AWGN channels Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E80B (5) 726-735 1997/05

    ISSN: 0916-8516

    eISSN: 1745-1345

  793. Reverse-link capacity and transmit power in a power-controlled cellular DS-CDMA system Peer-reviewed

    K Ohno, F Adachi

    ELECTRONICS AND COMMUNICATIONS IN JAPAN PART I-COMMUNICATIONS 80 (4) 72-82 1997/04

    ISSN: 8756-6621

  794. Effects of spreading chip rates on transmit power distribution in power-controlled DS-CDMA reverse link Peer-reviewed

    T Dohi, Y Okumura, F Adachi

    ELECTRONICS LETTERS 33 (6) 447-448 1997/03

    DOI: 10.1049/el:19970303  

    ISSN: 0013-5194

  795. Wideband multi-rate DS-CDMA mobile radio access Peer-reviewed

    F Adachi, M Sawahashi

    1997 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS, VOLS I-III 149-152 1997

  796. Channel estimation using time multiplexed pilot symbols for coherent rake combining for DS-CDMA mobile radio Peer-reviewed

    H Andoh, M Sawahashi, F Adachi

    PIMRC '97 - EIGHTH IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS: WAVES OF THE YEAR 2000+, TECHNICAL PROGRAM, PROCEEDINGS, VOLS 1-3 954-958 1997

  797. Wideband multi-rate DS-CDMA for next generation mobile communications systems Peer-reviewed

    F Adachi, M Sawahashi

    1997 WIRELESS COMMUNICATIONS CONFERENCE, PROCEEDINGS 57-62 1997

  798. Fast cell search algorithm in DS-CDMA mobile radio using long spreading codes Peer-reviewed

    K Higuchi, M Sawahashi, F Adachi

    1997 IEEE 47TH VEHICULAR TECHNOLOGY CONFERENCE PROCEEDINGS, VOLS 1-3 1430-1434 1997

    ISSN: 1090-3038

  799. Tree-structured generation of orthogonal spreading codes with different lengths for forward link of DS-CDMA mobile radio Peer-reviewed

    F Adachi, M Sawahashi, K Okawa

    ELECTRONICS LETTERS 33 (1) 27-28 1997/01

    DOI: 10.1049/el:19970022  

    ISSN: 0013-5194

  800. Theoretical analysis of DS-CDMA reverse link capacity with SIR-based transmit power control Peer-reviewed

    F Adachi

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E79A (12) 2028-2034 1996/12

    ISSN: 0916-8508

    eISSN: 1745-1337

  801. Low-power consuming analog-type matched filter for DS-CDMA mobile radio Peer-reviewed

    M Sawahashi, F Adachi, GL Shou, CM Zhou

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES E79A (12) 2071-2077 1996/12

    ISSN: 0916-8508

    eISSN: 1745-1337

  802. Adaptive phase diversity for MDPSK reception Peer-reviewed

    F Adachi

    IEE PROCEEDINGS-COMMUNICATIONS 143 (5) 267-272 1996/10

    DOI: 10.1049/ip-com:19960771  

    ISSN: 1350-2425

  803. Adaptive reception of MPSK signals in fast fading and AWGN channels Peer-reviewed

    F Adachi

    ELECTRONICS LETTERS 32 (21) 1944-1945 1996/10

    DOI: 10.1049/el:19961293  

    ISSN: 0013-5194

    eISSN: 1350-911X

  804. Experiments on coherent multicode DS-CDMA Peer-reviewed

    T Dohi, Y Okumura, A Higashi, F Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E79B (9) 1326-1332 1996/09

    ISSN: 0916-8516

    eISSN: 1745-1345

  805. Coherent multicode DS-CDMA mobile radio access Peer-reviewed

    F Adachi, K Ohno, A Higashi, T Dohi, Y Okumura

    IEICE TRANSACTIONS ON COMMUNICATIONS E79B (9) 1316-1325 1996/09

    ISSN: 0916-8516

    eISSN: 1745-1345

  806. Variable rate data transmission with blind rate detection for coherent DS-CDMA mobile radio Peer-reviewed

    Y Okumura, F Adachi

    ELECTRONICS LETTERS 32 (20) 1865-1866 1996/09

    DOI: 10.1049/el:19961238  

    ISSN: 0013-5194

    eISSN: 1350-911X

  807. Reduced state transition Viterbi differential detection of M-ary DPSK signals Peer-reviewed

    F Adachi

    ELECTRONICS LETTERS 32 (12) 1064-1066 1996/06

    DOI: 10.1049/el:19960707  

    ISSN: 0013-5194

  808. Decision feedback differential detection of differentially encoded 16APSK signals Peer-reviewed

    F Adachi, M Sawahashi

    IEEE TRANSACTIONS ON COMMUNICATIONS 44 (4) 416-418 1996/04

    DOI: 10.1109/26.489084  

    ISSN: 0090-6778

  809. Multicarrier 16QAM transmission with diversity reception Peer-reviewed

    M Sawahashi, F Adachi

    ELECTRONICS LETTERS 32 (6) 522-523 1996/03

    DOI: 10.1049/el:19960386  

    ISSN: 0013-5194

    eISSN: 1350-911X

  810. Reduced state Viterbi differential phase detection of MDPSK signals Peer-reviewed

    F Adachi

    ELECTRONICS LETTERS 32 (6) 527-529 1996/03

    DOI: 10.1049/el:19960365  

    ISSN: 0013-5194

    eISSN: 1350-911X

  811. Error rate analysis of differentially encoded and detected 16APSK under Rician fading Peer-reviewed

    F Adachi

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 45 (1) 1-11 1996/02

    DOI: 10.1109/25.481815  

    ISSN: 0018-9545

    eISSN: 1939-9359

  812. Adaptive differential detection for M-ary DPSK Peer-reviewed

    F Adachi

    IEE PROCEEDINGS-COMMUNICATIONS 143 (1) 21-28 1996/02

    DOI: 10.1049/ip-com:19960370  

    ISSN: 1350-2425

  813. Coherent DS-CDMA: Promising multiple access for wireless multimedia mobile communications Peer-reviewed

    F Adachi, M Sawahashi, T Dohi, K Ohno

    IEEE ISSSTA '96 - IEEE FOURTH INTERNATIONAL SYMPOSIUM ON SPREAD SPECTRUM TECHNIQUES & APPLICATIONS, PROCEEDINGS, VOLS 1-3 351-358 1996

  814. Reverse-link capacity and transmit power in a power-controlled cellular DS-CDMA system Peer-reviewed

    K. Ohno, F. Adachi

    IEICE Trans. Commun. J79-B-II (1) 17-25 1996/01

  815. BIT ERROR RATE ANALYSIS OF REDUCED-STATE VITERBI DIFFERENTIAL DETECTION OF M-ARY DPSK SIGNALS Peer-reviewed

    F ADACHI

    ELECTRONICS LETTERS 31 (24) 2069-2070 1995/11

    DOI: 10.1049/el:19951446  

    ISSN: 0013-5194

  816. APPROXIMATE MAXIMUM-LIKELIHOOD DIFFERENTIAL PHASE DETECTION WITH DIVERSITY RECEPTION Peer-reviewed

    F ADACHI

    ELECTRONICS LETTERS 31 (16) 1313-1314 1995/08

    DOI: 10.1049/el:19950913  

    ISSN: 0013-5194

  817. DIVERSITY RECEPTION OF 16STAR-QAM IN FREQUENCY-SELECTIVE RICIAN FADING Peer-reviewed

    DONG, X, TT TJHUNG, F ADACHI, CC KO

    ELECTRONICS LETTERS 31 (16) 1317-1319 1995/08

    DOI: 10.1049/el:19950893  

    ISSN: 0013-5194

  818. REDUCED-STATE VITERBI DIFFERENTIAL DETECTION USING A RECURSIVELY ESTIMATED PHASE REFERENCE FOR M-ARY DPSK Peer-reviewed

    F ADACHI

    IEE PROCEEDINGS-COMMUNICATIONS 142 (4) 263-270 1995/08

    DOI: 10.1049/ip-com:19952061  

    ISSN: 1350-2425

  819. FAST FREQUENCY-HOPPING TRANSMITTER AND RECEIVER BASED ON DIGITAL SIGNAL-PROCESSING AND ITS PERFORMANCE Peer-reviewed

    M SAWAHASHI, F ADACHI

    ELECTRONICS AND COMMUNICATIONS IN JAPAN PART I-COMMUNICATIONS 78 (5) 57-65 1995/05

    ISSN: 8756-6621

  820. DECISION-FEEDBACK DIFFERENTIAL PHASE DETECTION OF M-ARY DPSK SIGNALS Peer-reviewed

    F ADACHI, M SAWAHASHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 44 (2) 203-210 1995/05

    DOI: 10.1109/25.385910  

    ISSN: 0018-9545

    eISSN: 1939-9359

  821. Performance of SIR based power control in the presence of non-uniform traffic distribution

    Tomohiro Dohi, Mamoru Sawahashi, Fumiyuki Adachi

    Annual International Conference on Universal Personal Communications - Record 334-338 1995

    Publisher: IEEE

  822. Wideband coherent DS-CDMA Peer-reviewed

    K OHNO, M SAWAHASHI, F ADACHI

    1995 IEEE 45TH VEHICULAR TECHNOLOGY CONFERENCE - COUNTDOWN TO THE WIRELESS TWENTY-FIRST CENTURY, VOLS 1-2 779-783 1995

  823. ERROR RATE BOUND OF SUBOPTIMAL COHERENT DETECTION OF M-ARY PSK Peer-reviewed

    F ADACHI

    ELECTRONICS LETTERS 31 (1) 16-18 1995/01

    DOI: 10.1049/el:19950029  

    ISSN: 0013-5194

  824. TIME-DIVISION MULTIPLE-ACCESS METHODS FOR WIRELESS PERSONAL COMMUNICATIONS Peer-reviewed

    DD FALCONER, F ADACHI, B GUDMUNDSON

    IEEE COMMUNICATIONS MAGAZINE 33 (1) 50-57 1995/01

    DOI: 10.1109/35.339881  

    ISSN: 0163-6804

  825. MLSE DIFFERENTIAL PHASE DETECTION FOR M-ARY DPSK Peer-reviewed

    F ADACHI

    IEE PROCEEDINGS-COMMUNICATIONS 141 (6) 407-412 1994/12

    DOI: 10.1049/ip-com:19941542  

    ISSN: 1350-2425

  826. EXPERIMENTAL EVALUATION OF COMBINED POSTDETECTION DIVERSITY AND CONCATENATED CHANNEL CODING Peer-reviewed

    K OHNO, F ADACHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 43 (4) 1022-1026 1994/11

    DOI: 10.1109/25.330165  

    ISSN: 0018-9545

    eISSN: 1939-9359

  827. CLOSED-FORM ERROR-PROBABILITY FORMULA FOR NARROW-BAND FSK, WITH LIMITER-DISCRIMINATOR-INTEGRATOR DETECTION, IN RAYLEIGH FADING Peer-reviewed

    CS NG, TT TJHUNG, F ADACHI, FPS CHIN

    IEEE TRANSACTIONS ON COMMUNICATIONS 42 (10) 2795-2802 1994/10

    DOI: 10.1109/26.328949  

    ISSN: 0090-6778

    eISSN: 1558-0857

  828. BIT ERROR RATE ANALYSIS OF M-ARY DPSK IN FREQUENCY-SELECTIVE RICIAN FADING Peer-reviewed

    F ADACHI

    ELECTRONICS LETTERS 30 (21) 1734-1736 1994/10

    DOI: 10.1049/el:19941202  

    ISSN: 0013-5194

  829. POSTDETECTION DIVERSITY USING DIFFERENTIAL PHASE DETECTION FOR M-ARY DPSK Peer-reviewed

    F ADACHI, M IKURA

    ELECTRONICS LETTERS 30 (21) 1745-1746 1994/10

    DOI: 10.1049/el:19941206  

    ISSN: 0013-5194

  830. APPROXIMATE MAXIMUM-LIKELIHOOD COHERENT DETECTION OF M-ARY PSK SIGNALS USING VITERBI ALGORITHM Peer-reviewed

    F ADACHI

    ELECTRONICS LETTERS 30 (18) 1463-1465 1994/09

    DOI: 10.1049/el:19940994  

    ISSN: 0013-5194

  831. EFFECTS OF NON-MATCHED RECEIVER FILTERS ON PI-4-DQPSK BIT ERROR RATE IN RAYLEIGH FADING Peer-reviewed

    CS NG, TT TJHUNG, F ADACHI

    IEICE TRANSACTIONS ON COMMUNICATIONS E77B (6) 800-807 1994/06

    ISSN: 0916-8516

    eISSN: 1745-1345

  832. Fast frequency hopping using digital signal processing and its performance Peer-reviewed

    M. Sawahashi, F. Adachi

    IEICE Trans. Commun. J77-B-II (5) 233-239 1994/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0915-1885

  833. ERROR RATE ANALYSIS OF MDPSK CPSK WITH DIVERSITY RECEPTION UNDER VERY SLOW RAYLEIGH FADING AND COCHANNEL INTERFERENCE Peer-reviewed

    F ADACHI, M SAWAHASHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 43 (2) 252-263 1994/05

    DOI: 10.1109/25.293643  

    ISSN: 0018-9545

  834. POSTDETECTION PHASE COMBINING DIVERSITY Peer-reviewed

    M IKURA, F ADACHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 43 (2) 298-303 1994/05

    DOI: 10.1109/25.293648  

    ISSN: 0018-9545

  835. DECISION-FEEDBACK DIFFERENTIAL DETECTION OF 16-DAPSK SIGNALS Peer-reviewed

    F ADACHI, M SAWAHASHI

    ELECTRONICS LETTERS 29 (16) 1455-1457 1993/08

    DOI: 10.1049/el:19930974  

    ISSN: 0013-5194

    eISSN: 1350-911X

  836. ON THE ERROR RATES OF DIFFERENTIALLY DETECTED NARROW-BAND PI/4-DQPSK IN RAYLEIGH FADING AND GAUSSIAN-NOISE Peer-reviewed

    CS NG, TT TJHUNG, F ADACHI, KM LYE

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 42 (3) 259-265 1993/08

    DOI: 10.1109/25.231876  

    ISSN: 0018-9545

  837. PHASE DISTRIBUTIONS OF RAYLEIGH FADED SIGNAL WITH SELECTION DIVERSITY RECEPTION Peer-reviewed

    F ADACHI, TT TJHUNG

    IEE PROCEEDINGS-I COMMUNICATIONS SPEECH AND VISION 140 (4) 308-316 1993/08

    ISSN: 0956-3776

  838. Postdetection optimal diversity combiner for DPSK signal transmission under Rayleigh fading Peer-reviewed

    C. S. Ng, T. T. Tjhung, F. Adachi, K. M. Lye

    IEEE Trans. Veh. Technol. 42 (3) 326-337 1993/08

    Publisher: Institute of Electrical and Electronics Engineers

    DOI: 10.1109/25.231885  

    ISSN: 0018-9545

  839. DECISION-FEEDBACK MULTIPLE-SYMBOL DIFFERENTIAL DETECTION FOR M-ARY DPSK Peer-reviewed

    F ADACHI, M SAWAHASHI

    ELECTRONICS LETTERS 29 (15) 1385-1387 1993/07

    DOI: 10.1049/el:19930928  

    ISSN: 0013-5194

  840. Unified analysis on performance limits of coded multilevel DPSK in Rayleigh fading channels

    Tadashi Matsumoto, Fumiyuki Adachi

    Proceedings of the 1993 IEEE International Symposium on Information Theory 345 1993/01/01

  841. POSTDETECTION SELECTION DIVERSITY WITH UNEQUAL BRANCH POWER COMPENSATION Peer-reviewed

    K OHNO, F ADACHI, K KAWAMURA

    ELECTRONICS LETTERS 28 (25) 2359-2360 1992/12

    ISSN: 0013-5194

    eISSN: 1350-911X

  842. PERFORMANCE LIMITS OF CODED MULTILEVEL DPSK IN CELLULAR MOBILE RADIO Peer-reviewed

    T MATSUMOTO, F ADACHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 41 (4) 329-336 1992/11

    DOI: 10.1109/25.182581  

    ISSN: 0018-9545

  843. VITERBI-DECODING DIFFERENTIAL DETECTION OF DPSK Peer-reviewed

    F ADACHI, M SAWAHASHI

    ELECTRONICS LETTERS 28 (23) 2196-2198 1992/11

    DOI: 10.1049/el:19921409  

    ISSN: 0013-5194

    eISSN: 1350-911X

  844. PERFORMANCE ANALYSIS OF VARIOUS 16 LEVEL MODULATION SCHEMES UNDER RAYLEIGH FADING Peer-reviewed

    F ADACHI, M SAWAHASHI

    ELECTRONICS LETTERS 28 (17) 1579-1581 1992/08

    DOI: 10.1049/el:19921005  

    ISSN: 0013-5194

  845. Recent trends of mobile radio communication technologies Peer-reviewed

    F. Adachi

    J. Institute of Television Engineers of Japan 46 (8) 955-960 1992/08

    Publisher: The Institute of Image Information and Television Engineers

    DOI: 10.3169/itej1978.46.955  

    ISSN: 0386-6831

    eISSN: 1884-9652

  846. POSTDETECTION PHASE COMBINING DIVERSITY FOR RECEPTION OF FADED DPSK SIGNALS Peer-reviewed

    F ADACHI, K OHNO, M IKURA

    ELECTRONICS LETTERS 28 (16) 1513-1514 1992/07

    DOI: 10.1049/el:19920961  

    ISSN: 0013-5194

    eISSN: 1350-911X

  847. BASEBAND FEEDFORWARD FREQUENCY DRIFT COMPENSATION WITHOUT FALSE PHASE LOCKING FOR BURST DPSK SIGNAL RECEPTION Peer-reviewed

    M IKURA, F ADACHI

    ELECTRONICS LETTERS 28 (12) 1165-1167 1992/06

    DOI: 10.1049/el:19920735  

    ISSN: 0013-5194

    eISSN: 1350-911X

  848. COMBINED EFFECT OF DIVERSITY RECEPTION CHANNEL CODING ON ERROR FLOOR DUE TO DELAY SPREAD IN DPSK MOBILE RADIO Peer-reviewed

    K OHNO, F ADACHI, K KAWAMURA

    ELECTRONICS LETTERS 28 (12) 1131-1133 1992/06

    DOI: 10.1049/el:19920713  

    ISSN: 0013-5194

    eISSN: 1350-911X

  849. COMBINED EFFECTS OF PHASE SWEEPING TRANSMITTER DIVERSITY AND CHANNEL CODING Peer-reviewed

    A HIROIKE, F ADACHI, N NAKAJIMA

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 41 (2) 170-176 1992/05

    ISSN: 0018-9545

    eISSN: 1939-9359

  850. POSTDETECTION SELECTION DIVERSITY RECEPTION WITH CORRELATED, UNEQUAL AVERAGE POWER RAYLEIGH FADING SIGNALS FOR PI/4-SHIFT QDPSK MOBILE RADIO Peer-reviewed

    F ADACHI, K OHNO, M IKURA

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 41 (2) 199-210 1992/05

    DOI: 10.1109/25.142778  

    ISSN: 0018-9545

    eISSN: 1939-9359

  851. DIFFERENTIAL PHASE NOISE DISTRIBUTION OF RAYLEIGH FADED DPSK SIGNAL WITH SELECTION DIVERSITY Peer-reviewed

    F ADACHI, M SAWAHASHI

    ELECTRONICS LETTERS 28 (10) 898-900 1992/05

    DOI: 10.1049/el:19920570  

    ISSN: 0013-5194

    eISSN: 1350-911X

  852. DISTRIBUTION OF PHASE-ANGLE BETWEEN 2 RAYLEIGH VECTORS PERTURBED BY GAUSSIAN-NOISE Peer-reviewed

    F ADACHI, TT TJHUNG

    ELECTRONICS LETTERS 28 (10) 923-925 1992/05

    DOI: 10.1049/el:19920585  

    ISSN: 0013-5194

    eISSN: 1350-911X

  853. BASEBAND-PROCESSING FEEDFORWARD CARRIER FREQUENCY DRIFT COMPENSATION FOR DPSK MOBILE RADIO Peer-reviewed

    M IKURA, K OHNO, F ADACHI

    ELECTRONICS LETTERS 28 (8) 771-773 1992/04

    DOI: 10.1049/el:19920487  

    ISSN: 0013-5194

    eISSN: 1350-911X

  854. ANALYSIS OF DPSK ERROR RATE DUE TO MULTIPATH DELAY SPREAD Peer-reviewed

    F ADACHI

    ELECTRONICS LETTERS 28 (7) 623-625 1992/03

    DOI: 10.1049/el:19920393  

    ISSN: 0013-5194

    eISSN: 1350-911X

  855. Combined Effects of Phase Sweeping Transmitter Diversity and Channel Coding Peer-reviewed

    Akira Hiroike, Fumiyuki Adachi, Nobuo Nakajima

    IEEE Transactions on Vehicular Technology 41 (2) 170-176 1992

    DOI: 10.1109/25.142775  

    ISSN: 1939-9359 0018-9545

  856. QDPSK SIGNAL TRANSMISSION PERFORMANCE WITH POSTDETECTION SELECTION DIVERSITY RECEPTION IN LAND MOBILE RADIO Peer-reviewed

    K OHNO, F ADACHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 40 (4) 798-804 1991/11

    DOI: 10.1109/25.108391  

    ISSN: 0018-9545

    eISSN: 1939-9359

  857. FAST CLOCK SYNCHRONIZER USING INITIAL PHASE PRESETTING DPLL (IPP-DPLL) FOR BURST SIGNAL RECEPTION Peer-reviewed

    K OHNO, F ADACHI

    ELECTRONICS LETTERS 27 (21) 1902-1904 1991/10

    DOI: 10.1049/el:19911181  

    ISSN: 0013-5194

    eISSN: 1350-911X

  858. BASEBAND PROCESSING FREQUENCY-DRIFT-COMPENSATION FOR QDPSK SIGNAL TRANSMISSION Peer-reviewed

    M IKURA, K OHNO, F ADACHI

    ELECTRONICS LETTERS 27 (17) 1521-1523 1991/08

    DOI: 10.1049/el:19910956  

    ISSN: 0013-5194

    eISSN: 1350-911X

  859. DOUBLE SYMBOL ERROR RATE AND BLOCK ERROR RATE OF MDPSK Peer-reviewed

    F ADACHI, T MATSUMOTO

    ELECTRONICS LETTERS 27 (17) 1571-1573 1991/08

    DOI: 10.1049/el:19910984  

    ISSN: 0013-5194

    eISSN: 1350-911X

  860. POSTDETECTION SELECTION DIVERSITY WITH UNEQUAL BRANCH SIGNAL POWER COMPENSATION Peer-reviewed

    F ADACHI

    ELECTRONICS LETTERS 27 (17) 1588-1590 1991/08

    DOI: 10.1049/el:19910994  

    ISSN: 0013-5194

    eISSN: 1350-911X

  861. POSTDETECTION MRC DIVERSITY FOR PI/4-SHIFT QDPSK MOBILE RADIO Peer-reviewed

    F ADACHI, K OHNO

    ELECTRONICS LETTERS 27 (18) 1642-1643 1991/08

    DOI: 10.1049/el:19911026  

    ISSN: 0013-5194

    eISSN: 1350-911X

  862. COMBINED CONVOLUTIONAL CODING DIVERSITY RECEPTION FOR QDPSK LAND MOBILE RADIO Peer-reviewed

    T MATSUMOTO, F ADACHI

    IEICE TRANSACTIONS ON COMMUNICATIONS ELECTRONICS INFORMATION AND SYSTEMS 74 (6) 1522-1530 1991/06

    ISSN: 0917-1673

  863. BER ANALYSIS OF CONVOLUTION CODED QDPSK IN DIGITAL MOBILE RADIO Peer-reviewed

    T MATSUMOTO, F ADACHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 40 (2) 435-442 1991/05

    DOI: 10.1109/25.289425  

    ISSN: 0018-9545

    eISSN: 1939-9359

  864. BER PERFORMANCE OWING TO RANDOM FM NOISE FOR QDPSK MOBILE RADIO WITH DIVERSITY RECEPTION Peer-reviewed

    F ADACHI, K OHNO

    ELECTRONICS LETTERS 27 (8) 629-631 1991/04

    DOI: 10.1049/el:19910395  

    ISSN: 0013-5194

    eISSN: 1350-911X

  865. CHANNEL CODING DIVERSITY RECEPTION ON PACKET MOBILE RADIO Peer-reviewed

    M KITAGAWA, K OHNO, F ADACHI

    ELECTRONICS LETTERS 27 (7) 607-608 1991/03

    DOI: 10.1049/el:19910382  

    ISSN: 0013-5194

    eISSN: 1350-911X

  866. BER PERFORMANCE OF QDPSK WITH POSTDETECTION DIVERSITY RECEPTION IN MOBILE RADIO CHANNELS Peer-reviewed

    F ADACHI, K OHNO

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 40 (1) 237-249 1991/02

    DOI: 10.1109/25.69994  

    ISSN: 0018-9545

    eISSN: 1939-9359

  867. Postdetection diversity reception of QDPSK signals in land mobile radio channel Peer-reviewed

    K. Ohno, F. Adachi

    Trans. IEICE J73-B-II (11) 651-657 1990/11

  868. PERFORMANCE EVALUATION OF VARIOUS DECISION SCHEMES FOR FREQUENCY DEMODULATION OF NARROW-BAND DIGITAL FM SIGNALS IN LAND MOBILE RADIO Peer-reviewed

    K OHNO, F ADACHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 39 (2) 109-116 1990/05

    DOI: 10.1109/25.54227  

    ISSN: 0018-9545

    eISSN: 1939-9359

  869. POSTDETECTION DIVERSITY RECEPTION OF QDPSK SIGNALS UNDER FREQUENCY SELECTIVE RAYLEIGH FADING Peer-reviewed

    K OHNO, F ADACHI

    40TH IEEE VEHICULAR TECHNOLOGY CONFERENCE 431-436 1990

  870. EXPERIMENTAL EVALUATION OF POSTDETECTION DIVERSITY RECEPTION OF NARROW-BAND DIGITAL FM SIGNALS IN RAYLEIGH FADING Peer-reviewed

    F ADACHI, K OHNO

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 38 (4) 216-221 1989/11

    DOI: 10.1109/25.45484  

    ISSN: 0018-9545

  871. EFFECTS OF POSTDETECTION SELECTION DIVERSITY RECEPTION IN QDPSK LAND MOBILE RADIO Peer-reviewed

    K OHNO, F ADACHI

    ELECTRONICS LETTERS 25 (19) 1293-1294 1989/09

    DOI: 10.1049/el:19890865  

    ISSN: 0013-5194

    eISSN: 1350-911X

  872. ERROR RATE PERFORMANCE OF DIGITAL FM MOBILE RADIO WITH POSTDETECTION DIVERSITY Peer-reviewed

    F ADACHI, JD PARSONS

    IEEE TRANSACTIONS ON COMMUNICATIONS 37 (3) 200-210 1989/03

    DOI: 10.1109/26.20093  

    ISSN: 0090-6778

    eISSN: 1558-0857

  873. PERFORMANCE ANALYSIS OF A TIME DIVERSITY ARQ IN LAND MOBILE RADIO Peer-reviewed

    F ADACHI, S ITO, K OHNO

    IEEE TRANSACTIONS ON COMMUNICATIONS 37 (2) 177-183 1989/02

    DOI: 10.1109/26.20086  

    ISSN: 0090-6778

    eISSN: 1558-0857

  874. EFFECTS OF DIVERSITY RECEPTION ON BCH-CODED QPSK CELLULAR LAND MOBILE RADIO Peer-reviewed

    F ADACHI, H SUDA

    ELECTRONICS LETTERS 25 (3) 188-189 1989/02

    DOI: 10.1049/el:19890136  

    ISSN: 0013-5194

    eISSN: 1350-911X

  875. LEVEL-CROSSING RATE AND AVERAGE FADE DURATION FOR TIME DIVERSITY RECEPTION IN RAYLEIGH FADING CONDITIONS Peer-reviewed

    F ADACHI, MT FEENEY, JD PARSONS

    IEE PROCEEDINGS-F RADAR AND SIGNAL PROCESSING 135 (6) 501-506 1988/12

    ISSN: 0956-375X

  876. APPLICATION OF MLSE TO GMSK SIGNAL RECEPTION USING FREQUENCY DEMODULATOR Peer-reviewed

    K OHNO, F ADACHI

    ELECTRONICS LETTERS 24 (25) 1539-1540 1988/12

    DOI: 10.1049/el:19881050  

    ISSN: 0013-5194

    eISSN: 1350-911X

  877. UNIFIED ANALYSIS OF POSTDETECTION DIVERSITY FOR BINARY DIGITAL FM MOBILE RADIO Peer-reviewed

    F ADACHI, JD PARSONS

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 37 (4) 189-198 1988/11

    DOI: 10.1109/25.31123  

    ISSN: 0018-9545

  878. EXPERIMENTS ON POSTDETECTION DIVERSITY FOR NARROWBAND DIGITAL FM MOBILE RADIO Peer-reviewed

    F ADACHI, K OHNO

    ELECTRONICS LETTERS 24 (24) 1491-1493 1988/11

    DOI: 10.1049/el:19881018  

    ISSN: 0013-5194

    eISSN: 1350-911X

  879. BLOCK ERROR-PROBABILITY FOR NONCOHERENT FSK WITH DIVERSITY RECEPTION IN MOBILE RADIO Peer-reviewed

    F ADACHI, K OHNO

    ELECTRONICS LETTERS 24 (24) 1523-1525 1988/11

    DOI: 10.1049/el:19881040  

    ISSN: 0013-5194

    eISSN: 1350-911X

  880. PERFORMANCE ANALYSIS OF GMSK FREQUENCY DETECTION WITH DECISION FEEDBACK EQUALIZATION IN DIGITAL LAND MOBILE RADIO Peer-reviewed

    F ADACHI, K OHNO

    IEE PROCEEDINGS-F RADAR AND SIGNAL PROCESSING 135 (3) 199-207 1988/06

    ISSN: 0956-375X

  881. FIELD EXPERIMENTS OF NARROWBAND DIGITAL FM TRANSMISSIONS WITH DIVERSITY RECEPTION AT 1.45 GHZ CARRIER FREQUENCY Peer-reviewed

    K OHNO, F ADACHI

    ELECTRONICS LETTERS 24 (10) 576-577 1988/05

    DOI: 10.1049/el:19880391  

    ISSN: 0013-5194

    eISSN: 1350-911X

  882. 4.8 KBIT/S DATA-TRANSMISSION OVER 16 KBIT/S DIGITAL MOBILE RADIO CHANNEL Peer-reviewed

    S ITO, T MIKI, F ADACHI

    ELECTRONICS LETTERS 24 (11) 705-706 1988/05

    DOI: 10.1049/el:19880476  

    ISSN: 0013-5194

    eISSN: 1350-911X

  883. Countermeasures against fading Peer-reviewed

    S. Komaki, F. Adachi

    J. IEICE Japan 71 (5) 483-490 1988/05

    Publisher:

    ISSN: 0913-5693

  884. PERFORMANCE ANALYSIS OF ICMA/CD MULTIPLE-ACCESS FOR A PACKET MOBILE RADIO Peer-reviewed

    F ADACHI, K OHNO, M KITAGAWA

    ELECTRONICS LETTERS 24 (8) 469-471 1988/04

    DOI: 10.1049/el:19880318  

    ISSN: 0013-5194

    eISSN: 1350-911X

  885. BLOCK ERROR-PROBABILITY OF NARROWBAND DIGITAL FM WITH FREQUENCY DETECTION IN LAND MOBILE RADIO Peer-reviewed

    K OHNO, F ADACHI

    ELECTRONICS LETTERS 24 (7) 422-424 1988/03

    DOI: 10.1049/el:19880286  

    ISSN: 0013-5194

    eISSN: 1350-911X

  886. EFFECTS OF CORRELATED FADING ON LEVEL-CROSSING RATES AND AVERAGE FADE DURATIONS WITH PREDETECTION DIVERSITY RECEPTION Peer-reviewed

    F ADACHI, MT FEENEY, JD PARSONS

    IEE PROCEEDINGS-F RADAR AND SIGNAL PROCESSING 135 (1) 11-17 1988/02

    ISSN: 0956-375X

  887. Random FM Noise with Selection Combining Peer-reviewed

    F. Adachi, J. D. Parsons

    IEEE Transactions on Communications 36 (6) 752-755 1988

    DOI: 10.1109/26.2796  

    ISSN: 0090-6778

  888. GMSK FREQUENCY DETECTION USING DECISION FEEDBACK EQUALIZATION Peer-reviewed

    K OHNO, F ADCHI

    ELECTRONICS LETTERS 23 (25) 1350-1351 1987/12

    DOI: 10.1049/el:19870932  

    ISSN: 0013-5194

    eISSN: 1350-911X

  889. AN EVALUATION OF SPECIFIC DIVERSITY COMBINERS USING SIGNALS RECEIVED BY VERTICALLY-SPACED BASE-STATION ANTENNAS Peer-reviewed

    F ADACHI, MT FEENEY, JD PARSONS

    JOURNAL OF THE INSTITUTION OF ELECTRONIC AND RADIO ENGINEERS 57 (6) S218-S224 1987/11

    ISSN: 0267-1689

  890. HALF-BIT OFFSET DECISION FREQUENCY DETECTION OF DIFFERENTIALLY ENCODED GMSK SIGNALS Peer-reviewed

    K OHNO, F ADACHI

    ELECTRONICS LETTERS 23 (24) 1311-1312 1987/11

    DOI: 10.1049/el:19870907  

    ISSN: 0013-5194

    eISSN: 1350-911X

  891. POSTDETECTION DIVERSITY USING A MODIFIED PHASE-CORRECTION LOOP FOR DIGITAL LAND MOBILE RADIO Peer-reviewed

    F ADACHI, JD PARSONS

    IEE PROCEEDINGS-F RADAR AND SIGNAL PROCESSING 134 (1) 27-34 1987/02

    ISSN: 0956-375X

  892. Postdetection diversity using a modified phase–correction loop for digital land mobile radio Peer-reviewed

    F. Adachi, J. D. Parsons

    IEE Proceedings F: Communications Radar and Signal Processing 134 (1) 27-34 1987

    DOI: 10.1049/ip-f-1.1987.0006  

    ISSN: 0143-7070

  893. EFFICIENT ARQ WITH TIME DIVERSITY RECEPTION TECHNIQUE - A TIME DIVERSITY ARQ Peer-reviewed

    F ADACHI, S ITO

    ELECTRONICS LETTERS 22 (23) 1257-1258 1986/11

    DOI: 10.1049/el:19860861  

    ISSN: 0013-5194

    eISSN: 1350-911X

  894. COMMENT ON THE CALCULATION OF THE PDF OF THE OUTPUT OF A 2-BRANCH SWITCH AND STAY DIVERSITY SYSTEM Peer-reviewed

    JD PARSONS, AG WILLIAMSON, F ADACHI, FP PAYNE

    IEEE TRANSACTIONS ON COMMUNICATIONS 34 (11) 1150-1151 1986/11

    ISSN: 0090-6778

  895. CROSS-CORRELATION BETWEEN THE ENVELOPES OF 900 MHZ SIGNALS RECEIVED AT A MOBILE RADIO BASE STATION SITE Peer-reviewed

    F ADACHI, MT FEENEY, AG WILLIAMSON, JD PARSONS

    IEE PROCEEDINGS-F RADAR AND SIGNAL PROCESSING 133 (6) 506-512 1986/10

    ISSN: 0956-375X

  896. Postdetection maximal ratio combining for digital FM land mobile radio Peer-reviewed

    F. Adachi

    Trans. IECE Japan J66-B (9) 1171-1172 1983/09

    Publisher:

    ISSN: 0373-6105

  897. Postdetection combining diversity for digital FM land mobile radio Peer-reviewed

    F. Adachi

    Trans. IECE Japan J66-B (9) 1173-1174 1983/09

    Publisher:

    ISSN: 0373-6105

  898. Scanning diversity effect on channel reuse in a digital FM cellular land mobile radio Peer-reviewed

    F. Adachi

    Trans. IECE Japan E66 (7) 453-454 1983/07

  899. Advanced scanning diversity for a digital FM land mobile radio Peer-reviewed

    F. Adachi

    Trans. IECE Japan E66 (5) 283-289 1983/05

  900. Experimental results of dual scanning diversity system Peer-reviewed

    F. Adachi

    Trans. IECE Japan E66 (2) 159-160 1983/02

  901. On optimum measuring period of received signal strength in mobile radio environment Peer-reviewed

    Y. Murata, F. Adachi

    Trans. IECE Japan J65-B (11) 1444-1445 1982/11

  902. A study on the deterioration of median received signal strength detection in land mobile radio Peer-reviewed

    T. Matsumoto, F. Adachi

    Trans. IECE Japan J65-B (10) 1322-1323 1982/10

    Publisher:

    ISSN: 0373-6105

  903. On the decoding method for split-phase signal Peer-reviewed

    F. Adachi

    Trans. IECE Japan J65-B (9) 1206-1207 1982/09

    Publisher:

    ISSN: 0373-6105

  904. Improvement effect of scanning diversity reception on cochannel interference performance of a digital FM land mobile radio Peer-reviewed

    F. Adachi

    Trans. IECE Japan E65 (7) 409-410 1982/07

  905. THE USE AND EFFECT OF A SYLLABIC COMPANDOR FOR 800 MHZ BAND LAND MOBILE TELEPHONE SYSTEM Peer-reviewed

    T HATTORI, F ADACHI

    REVIEW OF THE ELECTRICAL COMMUNICATIONS LABORATORIES 30 (6) 1096-1107 1982

    ISSN: 0029-067X

  906. Influence of antenna spacing on postdetection selection diversity effects in digital FM land mobile radio Peer-reviewed

    F. Adachi

    Trans. IECE Japan J65-B (1) 54-61 1982/01

    Publisher:

    ISSN: 0373-6105

  907. POSTDETECTION SELECTION DIVERSITY EFFECTS ON DIGITAL FM LAND MOBILE RADIO Peer-reviewed

    F ADACHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 31 (4) 166-172 1982

    DOI: 10.1109/T-VT.1982.23932  

    ISSN: 0018-9545

    eISSN: 1939-9359

  908. The measurement of median received signal strength using charge coupled device in land mobile radio Peer-reviewed

    T. Matsumoto, F. Adachi

    Trans. IECE Japan J64-B (12) 1471-1472 1981/12

    Publisher:

    ISSN: 0373-6105

  909. Sequential estimate of cumulative probability of received signal strength in land mobile radio Peer-reviewed

    F. Adachi, H. Yoshida

    Trans. IECE Japan J64-B (10) 1153-1154 1981/10

    Publisher:

    ISSN: 0373-6105

  910. Selection and scanning diversity effects in a digital FM land mobile radio with limiter discriminator detection Peer-reviewed

    F. Adachi

    Trans. IECE Japan E64 (6) 398-405 1981/06

  911. Effective sample size and sampling frequency of statistical estimate of average received signal power in a Rayleigh fading signal environment Peer-reviewed

    F. Adachi, H. Yoshida

    Trans. IECE Japan J64-B (6) 556-557 1981/06

    Publisher:

    ISSN: 0373-6105

  912. Post-detection diversity effects in a quaternary digital FM land mobile radio Peer-reviewed

    F. Adachi

    Trans. IECE Japan J64-B (5) 369-376 1981/05

    Publisher:

    ISSN: 0373-6105

  913. Statistical estimate of median received signal voltage in a Rayleigh fading environment Peer-reviewed

    F. Adachi

    Trans. IECE Japan J64-B (4) 336-337 1981/04

    Publisher:

    ISSN: 0373-6105

  914. Estimation error of cumulative probability distribution of received signal strength in land mobile radio Peer-reviewed

    F. Adachi, H. Yoshida

    Trans. IECE Japan 63-B (11) 1158-1159 1980/11

  915. Postdetection selection diversity effects in a digital FM land mobile radio with discriminator and differential detection Peer-reviewed

    F. Adachi

    Trans. IECE Japan 63-B (8) 759-766 1980/08

  916. Postdetection diversity effect in digital FM land mobile radio Peer-reviewed

    F. Adachi, T. Hattori

    Trans. IECE Japan 63-B (4) 349-356 1980/04

  917. THEORETICAL-STUDIES OF A SIMULCAST DIGITAL RADIO PAGING SYSTEM USING A CARRIER FREQUENCY OFFSET STRATEGY Peer-reviewed

    T HATTORI, K HIRADE, F ADACHI

    IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 29 (1) 87-95 1980

    DOI: 10.1109/T-VT.1980.23826  

    ISSN: 0018-9545

    eISSN: 1939-9359

  918. The low-pass filtering effect of level detector in a two branch switching diversity Peer-reviewed

    F. Adachi

    Trans. IECE Japan 62-B (11) 1053-1054 1979/11

  919. Transmitter diversity for a digital FM paging system Peer-reviewed

    F. Adachi

    IEEE Trans. Veh. Technol. VT-28 (4) 333-338 1979/11

    DOI: 10.1109/T-VT.1979.23811  

  920. Error-rate performance of digital FM with differential detection in land mobile radio channels Peer-reviewed

    K. Hirade, M. Ishizuka, F. Adachi, K. Ohtani

    IEEE Trans. Veh. Technol. VT-28 (3) 204-212 1979/08

    DOI: 10.1109/T-VT.1979.23790  

  921. The influence of unequal branch powers on a two branch switched diversity using switch and stay strategy Peer-reviewed

    F. Adachi

    Trans. IECE Japan 62-B (5) 496-497 1979/05

  922. A method for deriving error probability of digital transmission systems Peer-reviewed

    F. Adachi, M. Ishizuka, K. Hirade

    Trans. IECE Japan 62-B (1) 74-75 1979/01

  923. A periodic switching diversity technique for a digital FM land mobile radio Peer-reviewed

    F. Adachi, T. Hattori, K. Hirade, T. Kamata

    IEEE Trans. Veh. Technol. VT-27 (4) 211-218 1978/11

    DOI: 10.1109/T-VT.1978.23751  

  924. Periodic switching diversity effect on co-channel interference performance of a digital FM land mobile radio Peer-reviewed

    F. Adachi

    IEEE Trans. Veh. Technol. VT-27 (4) 220-223 1978/11

    DOI: 10.1109/T-VT.1978.23752  

  925. Error-rate performance of digital FM with discriminator detection in the presence of co-channel interference under fast Rayleigh fading environment Peer-reviewed

    K. Hirade, M. Ishizuka, F. Adachi

    Trans. IECE Japan E61 (9) 704-709 1978/09

  926. Fading simulator for land mobile radio communication Peer-reviewed

    K. Hirade, K. Abe, T. Hanazawa, F. Adachi

    Trans. IECE Japan 58-B (9) 449-456 1975/09

Show all ︎Show first 5

Misc. 854

  1. Searching for Optimal Pilot Pattern by Black-box Optimization Method Using Quantum Computing-Comparative Evaluation with Other Methods-

    大湊浩明, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会技術研究報告(Web) 125 (163(RCS2025 98-122)) 2025/08

    ISSN: 2432-6380

  2. Searching for Optimal Pilot Pattern by Black-box Optimization Method Using Quantum Computing

    大湊浩明, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会技術研究報告(Web) 124 (409(RCS2024 256-300)) 2025/02

    ISSN: 2432-6380

  3. A Study on Interference-Aware Antenna Assignment Using Grover Adaptive Search in Distributed Antenna Systems

    花篭慶史, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会技術研究報告(Web) 123 (338(IT2023 30-74)) 2024/01

    ISSN: 2432-6380

  4. Application of Joint Transmit-Receive Diversity to A Cellular Distributed MU-MIMO System

    高橋領, 松尾英範, 安達文幸

    電子情報通信学会技術研究報告(Web) 123 (224(RCS2023 128-150)) 2023/10

    ISSN: 2432-6380

  5. A Study on MLD Considering Inter-cluster Interference for Distributed Antenna Systems Using Quantum Computing

    花篭慶史, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会技術研究報告(Web) 123 (108(RCS2023 79-100)) 2023/07

    ISSN: 2432-6380

  6. Interference Coordination in A Cellular Distributed MU-MIMO System-Intra-cell Interference Coordination-

    高橋領, 松尾英範, 安達文幸

    電子情報通信学会技術研究報告(Web) 122 (399(RCS2022 247-297)) 2023/02

    ISSN: 2432-6380

  7. Interference Coordination in A Cellular Distributed MU-MIMO System-Integrated Intra-cell/Inter-cell Interference Coordination-

    松尾英範, 高橋領, 安達文幸

    電子情報通信学会技術研究報告(Web) 122 (399(RCS2022 247-297)) 2023/02

    ISSN: 2432-6380

  8. Cell-free/Distributed Massive MIMO Empowered by Spatial-multiplexing-Realizing of Dynamic and Scalable User-centric Virtual Ultra-small-cell Network-

    安達文幸, 高橋領

    電子情報通信学会大会講演論文集(CD-ROM) 2023 2023/02

    ISSN: 1349-144X

  9. A Study on User Clustering Methods Using Quantum Computing in Large-scale Distributed Antenna Network Systems

    花篭慶史, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2023 2023/02

    ISSN: 1349-144X

  10. 移動無線通信技術の研究開発一筋に50年

    安達 文幸

    電子情報通信学会 通信ソサイエティマガジン 17 (2) 153 2023

    Publisher: 一般社団法人 電子情報通信学会

    DOI: 10.1587/bplus.17.153  

    eISSN: 2186-0661

  11. Improved Adaptive Interference/Radio Resource Management for 5G Advanced Ultra-dense RAN

    高橋領, 松尾英範, 安達文幸

    電子情報通信学会技術研究報告(Web) 121 (327(IT2021 28-82)) 2022

    ISSN: 2432-6380

  12. A Study on Distributed Antenna Network Construction Using Quantum Computing

    花篭慶史, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2022 2022

    ISSN: 1349-144X

  13. A Study on User-side Weight Vector on Suboptimal Joint Transmit-receive Diversity

    安達文幸, 高橋領

    電子情報通信学会大会講演論文集(CD-ROM) 2022 2022

    ISSN: 1349-144X

  14. Cellular Distributed MU-MIMO Communication System-Architecture Design and Interference Countermeasure-

    安達文幸, 高橋領, 松尾英範, XIA Sijie, GE Chang, CHEN Qiang

    電子情報通信学会技術研究報告(Web) 121 (391(RCS2021 251-299)) 2022

    ISSN: 2432-6380

  15. A Study on Uplink Postcoding in User-Centric and User-Cluster-Centric CF-mMIMO

    高橋領, 松尾英範, XIA Sijie, CHEN Qiang, CHEN Qiang, 安達文幸

    電子情報通信学会技術研究報告(Web) 122 (73(RCS2022 24-67)) 2022

    ISSN: 2432-6380

  16. A Study of Quantum Computing-based Cluster-Layering Method in Distributed Antenna Networks

    花篭慶史, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会技術研究報告(Web) 122 (106(RCS2022 68-96)) 2022

    ISSN: 2432-6380

  17. Toward Ultra-dense Mobile Communication Systems

    安達文幸

    電子情報通信学会技術研究報告(Web) 122 (155(SRW2022 8-15)) 2022

    ISSN: 2432-6380

  18. Channel Segregation and Multi-Subband Assignment for Inter-Cell Interference Coordination in Ultra-dense RAN

    松尾英範, 高橋領, 安達文幸

    電子情報通信学会技術研究報告(Web) 122 (164(RCS2022 97-127)) 2022

    ISSN: 2432-6380

  19. A Study on Computational Complexity Reduction of Pre/Postcoding in User-Cluster-Centric CF-mMIMO

    高橋領, 松尾英範, XIA Sijie, CHEN Qiang, CHEN Qiang, 安達文幸

    電子情報通信学会技術研究報告(Web) 122 (164(RCS2022 97-127)) 2022

    ISSN: 2432-6380

  20. A study on user-driven suboptimal joint transmit-receive diversity

    安達文幸, 高橋領

    電子情報通信学会技術研究報告(Web) 122 (164(RCS2022 97-127)) 2022

    ISSN: 2432-6380

  21. A Behavior of User-driven Multiuser Joint Transmit-Receive Diversity in An Asymmetric MIMO Fading Channel

    安達文幸, 高橋領

    電子情報通信学会技術研究報告(Web) 122 (252(RCS2022 155-184)) 2022

    ISSN: 2432-6380

  22. A Study of Optimal Perturbation Vector Search Using Quantum Computing in Vector Perturbation Introducing Symmetry when Using MMSE Norms

    花篭慶史, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会技術研究報告(Web) 122 (252(RCS2022 155-184)) 2022

    ISSN: 2432-6380

  23. Evaluation of MMSE Postcoding Schemes for Reducing Inter-cluster-interference in A Cellular Distributed MU-MIMO System

    高橋領, 松尾英範, 安達文幸

    電子情報通信学会技術研究報告(Web) 122 (311(RCS2022 185-207)) 2022

    ISSN: 2432-6380

  24. Convergence analysis of Interference-Aware Channel Segregation based Multiple Channel Assignment

    天間克宏, 滝沢賢一, 松尾英範, 安達文幸

    電子情報通信学会技術研究報告(Web) 122 (311(RCS2022 185-207)) 2022

    ISSN: 2432-6380

  25. Theoretical Study of User-wise Joint Transmit-receive Diversity for Multi-user MIMO Communication

    安達文幸, 高橋領

    電子情報通信学会技術研究報告(Web) 120 (320(IT2020 63-111)) 2021

    ISSN: 2432-6380

  26. Multi-user Joint Transmit-receive Diversity in A Correlated Fading Environment

    安達文幸, 高橋領

    電子情報通信学会大会講演論文集(CD-ROM) 2021 2021

    ISSN: 1349-144X

  27. Adaptive Interference/Radio Resource Management Integrating Inner-cell Interference Coordination and Inter-cell Interference Coordination for 5G Advanced Ultra-dense RAN

    高橋領, 松尾英範, 安達文幸

    電子情報通信学会技術研究報告(Web) 120 (404(RCS2020 203-261)) 2021

    ISSN: 2432-6380

  28. A Study on Impact of User-side Fading Correlation on Multi-user Joint Transmit/Receive Diversity

    安達文幸, 高橋領

    電子情報通信学会技術研究報告(Web) 121 (7(RCS2021 1-15)) 2021

    ISSN: 2432-6380

  29. A Study on Inter-Cluster Interference Coordination for Distributed Antenna Network Using Quantum Computing

    花篭慶史, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会技術研究報告(Web) 121 (103(RCS2021 77-98)) 2021

    ISSN: 2432-6380

  30. A Study on The Effect of Correlated Fading on Joint Transmit-receive Diversity and Eigenmode Beamforming

    安達文幸, 高橋領

    電子情報通信学会技術研究報告(Web) 121 (103(RCS2021 77-98)) 2021

    ISSN: 2432-6380

  31. Channel Segregation for Inter-Cell Interference Coordination in Ultra-dense RAN

    松尾英範, 高橋領, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2021 2021

    ISSN: 1349-144X

  32. A Study on Multi-layered Clustering for Interference Coordination in 5G Advanced Ultra-dense RAN

    高橋領, 松尾英範, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2021 2021

    ISSN: 1349-144X

  33. Generalization of Joint Transmit-Receiver Diversity and Its Application to Multiuser MIMO Communications

    安達文幸, 高橋領

    電子情報通信学会技術研究報告(Web) 121 (210(RCS2021 118-142)) 2021

    ISSN: 2432-6380

  34. A Study on User Scheduling for Overloaded Environment in Distributed Antenna Network Using Quantum Computing

    花篭慶史, 高橋領, 大山貴博, 安達文幸

    電子情報通信学会技術研究報告(Web) 121 (302(RCS2021 175-195)) 2021

    ISSN: 2432-6380

  35. 第3世代移動通信システム-マルチメディア通信の実現-

    安達文幸

    電子情報通信学会誌 103 (2) 2020

    ISSN: 0913-5693

  36. Study on Frequency Domain Echo Cancellation Scheme for High-Speed Digital Power Line Carriers.

    佐々木範雄, 花海丞, 鈴木英祐, 安達文幸

    電気学会研究会資料 (CMN-20-001-033) 2020

  37. R & D Plan for Interference and Radio Resource Management for Advanced 5G Radio Access Networks

    安達文幸, 高橋領, 松尾英範

    電子情報通信学会技術研究報告 119 (376(IT2019 36-89)) 2020

    ISSN: 0913-5685

  38. A Study on Joint User Clustering and Scheduling for Distributed MIMO Cooperative Wireless Access Network

    高橋領, 松尾英範, 安達文幸

    電子情報通信学会技術研究報告 119 (376(IT2019 36-89)) 2020

    ISSN: 0913-5685

  39. R&D of Technology for High Reliability Management of Advanced 5G Network to Various Requirements of Communication Services

    村上隆秀, 新保宏之, 塚本優, 難波忍, 岸洋司, 玉井森彦, 横山浩之, 原郁紀, 石橋功至, 津田顕祐, 藤井義巳, 安達文幸, 葛西惠介, 中沢正隆, 関裕太, 外山隆行

    電子情報通信学会技術研究報告 119 (448(RCS2019 320-408)(Web)) 2020

    ISSN: 0913-5685

  40. Joint Multilayered User Clustering and Scheduling for Ultra-dense RAN in 5G Advanced Systems

    高橋領, 松尾英範, 安達文幸

    電子情報通信学会技術研究報告 119 (448(RCS2019 320-408)(Web)) 2020

    ISSN: 0913-5685

  41. Adaptive Interference and Radio Resource Control for 5G-Advanced Ultra-Dense RAN

    安達文幸, 高橋領, 松尾英範

    電子情報通信学会大会講演論文集(CD-ROM) 2020 2020

    ISSN: 1349-144X

  42. Underwater Optical Wireless Communication System Considered in ALAN Consortium

    鈴木謙一, 高橋成五, 島田雄史, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2020 2020

    ISSN: 1349-144X

  43. Zero-forcing based Multi-user MIMO Coordinated with User-wise Joint Transmit-receive Diversity

    安達文幸, 高橋領

    電子情報通信学会技術研究報告(Web) 120 (89(RCS2020 58-77)) 2020

    ISSN: 2432-6380

  44. Study on Multi-user MIMO Coordinated with User-wise Spatial Diversity

    安達文幸, 高橋領

    電子情報通信学会技術研究報告(Web) 120 (74(RCS2020 23-57)) 2020

    ISSN: 2432-6380

  45. A Study on Combined Effect of Cluster Multilayering and MMSE Filtering on Inter-cluster Interference Mitigation in 5G Advanced Ultra-dense RAN

    高橋領, 松尾英範, 安達文幸

    電子情報通信学会技術研究報告(Web) 120 (29(RCS2020 10-22)) 2020

    ISSN: 2432-6380

  46. A study of Inter-Cell Interference Coordination for Ultra-dense RAN in 5G Advanced Systems

    松尾英範, 高橋領, 安達文幸

    電子情報通信学会技術研究報告(Web) 120 (29(RCS2020 10-22)) 2020

    ISSN: 2432-6380

  47. Multi-user MIMO Coordinated with User-wise Joint Transmit-receive Diversity Using Linear Array at BS

    安達文幸, 高橋領

    電子情報通信学会技術研究報告(Web) 120 (204(RCS2020 92-109)) 2020

    ISSN: 2432-6380

  48. C/U-Plane Separation Architecture in Ultra-dense RAN Using User-cluster-wise MU-MIMO

    安達文幸, 高橋領, 松尾英範

    電子情報通信学会大会講演論文集(CD-ROM) 2020 2020

    ISSN: 1349-144X

  49. Wireless Evolution Towards 5G And Beyond Invited

    Fumiyuki Adachi

    2019 3rd International Conference on Recent Advances in Signal Processing, Telecommunications & Computing (SigTelCom), Hanoi, Vietnam 2019/03/21

    Publisher: IEEE

    DOI: 10.1109/sigtelcom.2019.8696257  

  50. 5G実現に向けた超高密度マルチバンド・マルチアクセス多層セル構成による大容量化技術の研究開発

    箕輪守彦, 関宏之, 奥村幸彦, 須山聡, 寺田純, 重松智志, 鷹取泰司, 浅野弘明, 平野幸男, 山尾泰, 安達文幸, 中沢正隆

    電子情報通信学会総合大会 2019 2019/03/05

    ISSN: 1349-144X

  51. 5G R&D Activities for High Capacity Technologies with Ultra High-Density Multi-Band and Multi-Access Layered Cells

    IEICE technical report :RCS2018-323 2019/03

  52. A Proposal of Concept Extension of Radio Access Network

    天間克宏, 久利敏明, 安達文幸

    電子情報通信学会技術研究報告 118 (433(IT2018 35-74)) 2019

    ISSN: 0913-5685

  53. 端末間協調省電力通信フレームワーク-実機実験を用いた有効性の評価-

    服部聖彦, 天間克宏, ZHAO Ou, SHAN Lin, 安達文幸, 大和田泰伯

    電子情報通信学会論文誌 B(Web) J102-B (6) 2019

    ISSN: 1881-0209

  54. Study on MMSE-FDE for High-speed Digital Power Line Carrier Systems.

    佐々木範雄, 花海丞, 鈴木英祐, 安達文幸

    電気学会研究会資料 (ST-19-027-044/SMF-19-052-069) 2019

  55. 端末間連携・省電力通信システムのスマートフォンへの実装

    天間克宏, 服部聖彦, SHAN Lin, ZHAO Ou, 安達文幸, 大和田泰伯

    電子情報通信学会大会講演論文集(CD-ROM) 2019 2019

    ISSN: 1349-144X

  56. 水中ネットワークを実現するALANコンソーシアム

    鈴木謙一, 島田雄史, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2019 2019

    ISSN: 1349-144X

  57. A Phase Rotation Sequence Estimation based on Minimum Euclidean Distance of Fourth-power Constellation for Blind Selected Mapping: 無線通信システム ; 移動通信ワークショップ

    117 (456) 435-440 2018

    ISSN: 0913-5685

  58. Study on Adaptive MMSE-SVD for the tracking ability against fading

    関裕太, BOONKAJAY Amnart, 安達文幸

    電子情報通信学会技術研究報告 117 (456(RCS2017 317-406)) 2018

    ISSN: 0913-5685

  59. Study on Adaptive STBC-TD for Distributed MIMO Cooperative Transmission

    齋藤智之, BOONKAJAY Amnart, 安達文幸

    電子情報通信学会技術研究報告 117 (456(RCS2017 317-406)) 2018

    ISSN: 0913-5685

  60. 時空間ブロック符号化送信ダイバーシチを用いるときのリンク容量に及ぼす分散アンテナ本数の影響に関する一検討

    齋藤智之, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2018 2018

    ISSN: 1349-144X

  61. 周辺マクロセルからのCCIを考慮したマルチユーザMMSE-SVDにおけるCCI誤差の影響に関する一検討

    関裕太, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2018 2018

    ISSN: 1349-144X

  62. 多数端末環境下における端末間連携・省電力システムの初期的検討

    天間克宏, 服部聖彦, 服部聖彦, SHAN Lin, ZHAO Ou, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2018 2018

    ISSN: 1349-144X

  63. A Study on Dynamic Antenna Clustering for Distributed MIMO Cooperative Wireless Access Network

    齋藤智之, 安達文幸

    電子情報通信学会技術研究報告 118 (177(RCS2018 131-149)(Web)) 2018

    ISSN: 0913-5685

  64. On Selective MIMO Diversity for Mobile Radio

    安達文幸, BOONKAJAY Amnart

    電子情報通信学会技術研究報告 118 (125(RCS2018 80-130)(Web)) 2018

    ISSN: 0913-5685

  65. Study on DPLL Scheme Using Zadoff-Chu Sequence for High-speed Digital Power Line Carrier Systems.

    佐々木範雄, 花海丞, 鈴木英祐, 安達文幸

    映像情報メディア学会技術報告 42 (37(BCT2018 86-91)) 2018

    ISSN: 1342-6893

  66. A Study on PAPR Reduction for MU-MIMO using Blind Selected Mapping: 無線通信システム

    Amnart Boonkajay, Fumiyuki Adachi

    117 (132) 215-220 2017/07

    ISSN: 0913-5685

  67. Special Section on Smart Radio and Its Applications in Conjunction with Main Topics of SmartCom FOREWORD

    Fumiyuki Adachi

    IEICE TRANSACTIONS ON COMMUNICATIONS E100B (7) 1031-1031 2017/07

    ISSN: 0916-8516

    eISSN: 1745-1345

  68. Blind Selected Mapping Technique for Space-Time Block Coded Transmit Diversity with Transmit Frequency-Domain Equalization

    Amnart Boonkajay, Fumiyuki Adachi

    116 (479) 7-12 2017/03

    ISSN: 0913-5685

  69. FOREWORD

    ADACHI Fumiyuki

    IEICE Transactions on Communications E100.B (7) 1031-1031 2017

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI: 10.1587/transcom.2016scf0001  

    ISSN: 0916-8516

    eISSN: 1745-1345

  70. Keynote talk #2: Distributed MIMO cooperative signal transmission for 5G

    Fumiyuki Adachi

    2017 International Conference on Recent Advances in Signal Processing, Telecommunications & Computing (SigTelCom) xix-xix 2017/01/01

    Publisher: IEEE

    DOI: 10.1109/sigtelcom.2017.7849784  

    More details Close

    After 35 years from its birth in 1979, mobile wireless communications networks have evolved into the 4th generation (4G). The mobile data traffic volume is growing explosively and therefore, significantly advanced spectrum- and energy-efficient wireless communication technology needs to be developed for the 5th generation (5G) mobile wireless communications networks. One promising approach is to adopt a distributed antenna smallcell network, in which a number of distributed antennas are deployed over a macro-cell area. Distributed antennas surrounding a user and user antennas form distributed MIMO channel. In this presentation, two types of distributed MIMO cooperative signal transmission technique are presented. One is space-time block coded (STBC) diversity, which aims to improve the macro-cell edge users' throughput. The other is multi-user joint transmit/receive filtering, which aims to improve the sum-throughput of users in a good channel condition. When using cooperative signal transmission, peak-to-average power ratio (PAPR) of the transmit signal is increased. Therefore, PAPR reduction will be still necessary for battery-operated user terminal transmit power amplifiers. Blind selected mapping (blind SLM) which can effectively suppress the PAPR and requires no side information sharing is presented.

  71. A Study on Channel Estimation for Time-Division Duplex Distributed Antenna Cooperative Transmission

    安達文幸, BOONKAJAY Amnart, 齋藤智之, 関裕太

    電子情報通信学会技術研究報告 116 (396(RCS2016 236-288)) 2017

    ISSN: 0913-5685

  72. Study on Scheduling for Large-Scale Distributed Antenna Small-Cell Network Using STBC Transmit Diversity

    齋藤智之, 安達文幸

    電子情報通信学会技術研究報告 116 (479(RCS2016 289-337)) 2017

    ISSN: 0913-5685

  73. Downlink Capacity Comparison of MMSE-SVD and BD-SVD for Cooperative Distributed Antenna Transmission using Multi-user Scheduling

    関裕太, 安達文幸

    電子情報通信学会技術研究報告 116 (479(RCS2016 289-337)) 2017

    ISSN: 0913-5685

  74. 送電線用ディジタル電力線搬送のDPLL方式について

    佐々木範雄, 花海丞, 織田健志, 安達文幸

    電気学会全国大会講演論文集(CD-ROM) 2017 2017

  75. Study on Adaptive MMSE-SVD in Distributed MIMO Cooperative Transmission

    関裕太, BOONKAJAY Amnart, 安達文幸

    電子情報通信学会技術研究報告 117 (246(RCS2017 168-203)) 2017

    ISSN: 0913-5685

  76. A Study on Adaptive Channel Estimation for Distributed MIMO Cooperative Transmission

    安達文幸, BOONKAJAY Amnart

    電子情報通信学会技術研究報告 117 (246(RCS2017 168-203)) 2017

    ISSN: 0913-5685

  77. Study on Adaptive ICIC for Distributed MIMO Cooperative Transmission

    齋藤智之, 安達文幸

    電子情報通信学会技術研究報告 117 (246(RCS2017 168-203)) 2017

    ISSN: 0913-5685

  78. ディジタル電力線搬送におけるシングルキャリアブロック伝送の既知トレーニング系列を用いた周波数オフセット推定とDFT窓タイミング検出

    佐々木範雄, CHEN Qiang, 安達文幸

    電気学会電子・情報・システム部門大会講演論文集(CD-ROM) 2017 2017

  79. Improving Energy Efficiency from the Perspective of the Number of Energy-Saving Modes

    Atefeh Hajijamali Arani, Abolfazl Mehbodniya, Mohammad Javad Omidi, Fumiyuki Adachi

    116 (318) 59-62 2016/11

    ISSN: 0913-5685

  80. Towards Joint User Association and Self-Organizing Resource Allocation in HetNets

    Atefeh Hajijamali Arani, Abolfazl Mehbodniya, Mohammad Javad Omidi, Fumiyuki Adachi

    116 (257) 31-34 2016/10

    ISSN: 0913-5685

  81. 2-Step Signal Detection for Blind Time-Domain Selected Mapping

    Amnart Boonkajay, Fumiyuki Adachi

    116 (257) 161-166 2016/10

    ISSN: 0913-5685

  82. Effective exploitation of spatial domain for 5G small-cell structured mobile networks

    Fumiyuki Adachi

    IEICE Proceeding Series 24 B1-01 2016/10/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI: 10.34385/proc.24.b1-01  

    eISSN: 2188-5079

    More details Close

    After 35 years from its birth in 1979, mobile communications network has evolved into the 4th generation (4G). The mobile data traffic volume in 2020 is expected to reach about 1000 times of 2010. Therefore, the energy-efficiency has become an important concern for the next generation 5th generation (5G) mobile communications. To improve both the spectrum-efficiency and energy-efficiency, wireless networks need to be significantly restructured. One promising solution is to introduce small-cell structured networks. In this talk, after overviewing the evolution of mobile communications technology over the past 35 years, we will discuss about the small-cell structured networks for 5G. There are two approaches to implement the small-cells: distributed small base stations (SBSs) and distributed antennas (DAs). For small-cell structured networks using DAs, a virtual macro-cell concept will be introduced. Then, we will present the recent advances in distributed antenna cooperative signal transmission techniques which improve simultaneously the spectrum and energy efficiencies while providing seamless connection.

  83. Study on Scheduling for Cooperative Distributed Antenna Network Using STBC Diversity

    齋藤智之, 安達文幸

    IEICE technical report :RCS2016-154 116 (257(RCS2016 153-190)) 7-12 2016/10

    ISSN: 0913-5685

  84. 災害に強い通信ネットワークの構築を目指して

    安達文幸

    電子情報通信学会技術研究報告RCS2016-139 116 (184) 2016/08

    ISSN: 0913-5685

  85. Impact of CSI error on Distributed Antenna OFDM-MU-MIMO Downlink

    関裕太, 熊谷慎也, 安達文幸

    IEICE technical report : RCS2015-334 115 (472) 7-12 2016/03/02

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  86. Transmission Performance of OFDM Downlink Using Distributed Antenna STBC Transmit Diversity

    齋藤智之, 宮崎寛之, 安達文幸

    IEICE technical report : RCS2015-335 115 (472) 13-18 2016/03/02

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  87. A Study on Convergence of Interference-Aware Channel Segregation based Dynamic Channel Assignment

    天間克宏, 安達文幸, SHAN Lin, 大和田泰伯, 服部聖彦, 浜口清

    電子情報通信学会技術研究報告 IEICE technical report RCS2015-361 115 (472) 169-174 2016/03/02

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  88. Low-PAPR Filtered Single Carrier Signal Transmission with Space-Time Transmit Diversity and Blind Time-Domain Selected Mapping

    Amnart Boonkajay, Fumiyuki Adachi

    IEICE technical report :RCS2015-338 115 (472) 31-36 2016/03

    ISSN: 0913-5685

  89. Impact of UE Scheduling Criteria on Distributed Antenna OFDM-MU-MIMO Downlink

    熊谷慎也, 関裕太, 安達文幸

    IEICE technical report :RCS2015-333 115 (472(RCS2015 333-399)) 2016/03

    ISSN: 0913-5685

  90. Study on Scheduling for OFDMA Downlink Using Distributed Antenna Space-Time Block Coded Diversity

    盛夢都, 宮崎寛之, 安達文幸

    IEICE technical report :RCS2015-337 115 (472(RCS2015 333-399)) 2016/03

    ISSN: 0913-5685

  91. Switching Timing Detection Scheme of Different Training Sequence for Digital Power Line Carrier Systems

    佐々木範雄, 花海丞, 織田健志, 安達文幸

    電気学会通信研究会資料 CMN-16 (1-14) 2016

  92. B-5-17 5G R&D Activities for Ultra High-Density Distributed Antenna Systems

    Seki Hiroyuki, Minowa Morihiko, Suyama Satoshi, Okumura Yukihiko, Shigematsu Satoshi, Kimura Shunji, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2016 (1) 410 2016

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  93. B-5-83 Selection Transmit Diversity for Space-Time Block Coded Amplify-and-Forward Bi-Directional Relay Using Analog Network Cording

    ENDO Chikara, MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2016 (1) 476 2016

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  94. Performance Analysis for Single-Carrier Space-Time Block Coding Diversity in a High Mobility Environment

    宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 115 (394(IT2015 48-100)) 2016

    ISSN: 0913-5685

  95. Extreme power-saving communication method based on cooperation among smartphones

    服部聖彦, LIN Shan, 天間克宏, MEHBODNIYA Abolfazl, 大和田泰伯, 浜口清, 安達文幸

    電子情報通信学会技術研究報告 115 (437(ASN2015 78-98)) 2016

    ISSN: 0913-5685

  96. Distributed Antenna Cooperative Signal Transmission and Signal Peak Suppression for 5G Mobile Communication Systems

    安達文幸, 熊谷慎也, 宮崎寛之, BOONKAJAY Amnart, 関裕太, 齋藤智之

    電子情報通信学会技術研究報告 116 (110(RCS2016 46-93)) 2016

    ISSN: 0913-5685

  97. Image Transmission using Analog Single-Carrier with Frequency-Domain Equalization

    船木洋晃, BOONKAJAY Amnart, 安達文幸, 阿部正英

    電子情報通信学会技術研究報告 116 (110(RCS2016 46-93)) 2016

    ISSN: 0913-5685

  98. Effect of Cyclic Delay Diversity on Space-Time Block Coded Amplify-and-Forward Bi-Directional Relay Using Analog Network Cording

    遠藤力, 宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 115 (472(RCS2015 333-399)) 2016

    ISSN: 0913-5685

  99. Continuous Evolution of Mobile Communications Technology

    安達文幸

    電子情報通信学会技術研究報告 115 (472(RCS2015 333-399)) 2016

    ISSN: 0913-5685

  100. 非同期TDD環境下における分散アンテナネットワークのための送受信ダイバーシチに関する研究

    齋藤翔, 安達文幸

    電気関係学会東北支部連合大会講演論文集(CD-ROM) 2016 2016

  101. Distributed Antenna Selection Schemes for Distributed Antenna OFDM Space-Time Block Coded Diversity

    宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 115 (472(RCS2015 333-399)) 2016

    ISSN: 0913-5685

  102. 送電線ディジタル電力線搬送の適応等化器における簡易発散防止法

    佐々木範雄, 花海丞, 織田健志, 安達文幸

    電気学会論文誌 C 136 (7) 2016

    ISSN: 0385-4221

  103. Downlink MMSE-SVD Joint Tx/Rx Filtering for Distributed Antenna Small-Cell Network under Multi-cell Environment

    関裕太, 安達文幸

    電子情報通信学会技術研究報告 116 (257(RCS2016 153-190)) 2016

    ISSN: 0913-5685

  104. 無人航空機を用いる時空間ブロック符号化非再生中継伝送のフィールド実験

    安達文幸, 宮崎寛之, 遠藤力, 小野文枝, 三浦龍

    電子情報通信学会大会講演論文集(CD-ROM) 2016 2016

    ISSN: 1349-144X

  105. 5G超高密度分散アンテナシステムにおける大容量化技術の実験的検証~広帯域協調マルチユーザMIMO伝送の屋外フィールド実験~

    筒井正文, 伊達木隆, 関宏之, 箕輪守彦, 秋山千代志, 椎崎耕太郎, 奥山達樹, 増野淳, 須山聡, 奥村幸彦, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2016 2016

    ISSN: 1349-144X

  106. Frequency-Domain Blind Selected Mapping Technique for Space-Time Block Coded Low-PAPR SC-FDE

    Amnart Boonkajay, Fumiyuki Adachi

    IEICE technical report :RCS2015-261 115 (369) 103-108 2015/12

    ISSN: 0913-5685

  107. [Invited Lecture] 5G R&D Activities for High Capacity Technologies with Ultra High-Density Multi-Band and Multi-Access Layered Cells Invited

    箕輪守彦, 関宏之, 奥村幸彦, 須山聡, 大高明浩, 木村俊二, 中津川征士, 浅野弘明, 市川泰史, 平野幸男, 山尾泰, 安達文幸, 中沢正隆

    IEICE technical report :RCS2015-250 115 (369(RCS2015 243-279)) 2015/12

    ISSN: 0913-5685

  108. Cyclic Delay Pilot Aided Channel Estimation for Space-Time Block Coded Amplify-and-Forward Bi-Directional Relay Using Analog Network Coding

    Chikara Endo, Hiroyuki Miyazaki, Fumiyuki Adachi

    IEICE technical report : RCS2015-21 115 (288) 121-126 2015/11/04

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  109. A Base Station Sleep Mode Algorithm Combined with a Channel Interference-Aware Channel Segregation in HetNet

    Ren Sugai, Abolfazl Mehbodniya, Fumiyuki Adach

    IEICE technical report :RCS2015-229 115 (288) 233-238 2015/11

    ISSN: 0913-5685

  110. Time-Domain Selected Mapping with Polyphase Rotations and Blind Detection for Filtered Single-Carrier Signals

    Boonkajay Amnar, Adachi Fumiyuki

    IEICE technical report :RCS2015-160 115 (233) 23-28 2015/10/01

    Publisher: 電子情報通信学会

    ISSN: 0913-5685

  111. Keynote talk #1: Wireless evolution and challenges for 5G wireless networks

    Fumiyuki Adachi

    2015 2nd National Foundation for Science and Technology Development Conference on Information and Computer Science (NICS) xxi-xxii 2015/09/01

    Publisher: IEEE

    DOI: 10.1109/nics.2015.7302165  

    More details Close

    Wireless networks have evolved from the 1st generation (1G) using analog technology to the 2nd generation (2G) using digital technology, the 3rd generation (3G) and then to the 4th generation (4G) called LTE-A via 3.9G LTE. Every 10 years, new generation networks appeared. LTE-A networks provide a very high speed transmission of several 100Mbps. The mobile data traffic has been increasing rapidly by about two times per year owing to increasing popularity of broadband data services such as high quality video. Because of limited available bandwidth, the spectrum-efficiency has been the most important concern for the last few decades. The available energy, in particular for battery operated user terminals, is also limited. Therefore, the energy-efficiency has become an important concern. To improve the spectrum-efficiency and energy-efficiency simultaneously, the wireless networks need to be significantly restructured. One promising solution is an introduction of small-cell structured network. However, a wide range of user mobility is problematic; frequent handover will be caused. Traffic density is not necessarily high everywhere. Therefore, it is wise to keep the cell size the same as macro-cell networks while exploiting more non-uniform spatial distribution of users. We are recently investigating a virtual macro-cell network, where a virtual macro-cell is consisted of a macro-cell and many small-cells. There are two approaches to implement the small-cell layer: distributed small base stations and distributed antennas. In this presentation, we will overview the wireless evolution over the last 30 years. Then, we will discuss the technical issues for the realization of 5G wireless networks. There is the spectrum-energy efficiency tradeoff when using the frequency reuse. The spectrum-efficiency and energy-efficiency can be improved by adopting the small-cell structure. We will introduce a virtual macro-cell network implemented by distributed antennas. Finally, we will present some simulation results of the communications quality achievable with the virtual macro-cell network.

  112. Challenges Toward Spectrum-Energy Efficient Wireless Networks

    Fumiyuki Adachi

    IEICE Proceeding Series 22 SESSION1-1 2015/08/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI: 10.34385/proc.22.session1-1  

    eISSN: 2188-5079

    More details Close

    Due to recent rapid penetration of smart phones into our society, broadband wireless services have been getting more and more popular. It is said that the wireless traffic volume has been increasing rapidly by about 2 times per year. Because of limited available bandwidth, the spectrum-efficiency has been the most important concern for the last few decades. The available energy, in particular for battery operated user terminals, is also limited. Therefore, the energy-efficiency has become an important issue. However, the spectrum-efficiency and the energy-efficiency are in a tradeoff relationship. To improve the spectrum-efficiency and energy-efficiency simultaneously, the wireless access network may need a significant restructuring. One promising solution is an introduction of small-cell structured network. Both spectrum-efficiency and energy-efficiency can simultaneously be improved by adopting the small-cell structure. However, a wide range of user mobility is problematic; frequent handover will happen. Furthermore, traffic density is not necessarily high everywhere. It is wise to keep the cell size the same as macro-cell network while exploiting more the spatial distribution of users. We are recently investigating two-layer virtual macro-cell network (e.g., a combination of small-cells and macro-cells). There are two approaches to implement the small-cell layer: distributed small base stations and distributed antennas. In this talk, we will overview the wireless evolution, discuss the spectrum-energy efficiency tradeoff. Then, we will introduce the two-layer virtual macro-cell network. Finally, we will discuss about the power on/off management, distributed dynamic channel allocation, and multi-access problems.

  113. A Novel Handover Algorithm with Load Balancing for Next Generation HetNet

    Rintaro Yoneya, Abolfazl Mehbodniya, Fumiyuki Adachi

    IEICE technical report :RCS2014-303 114 (490) 11-15 2015/03

    ISSN: 0913-5685

  114. A Distributed Sleep Mode and Bandwidth Allocation Algorithm for Improving Energy-Efficiency in Dense HetNet

    Abolfazl Mehbodniya, Fumiyuki Adachi

    IEICE technical report :RRCS2014-368 114 (490) 399-403 2015/03

    ISSN: 0913-5685

  115. Space-Time Block Coded Amplify-and-Forward Bi-Directional Relay Using Analog Network Coding

    遠藤力, 宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 115 (181(RCS2015 132-155)) 2015

    ISSN: 0913-5685

  116. Subcarrier Combining for Analog SC-FDE: 無線通信システム

    114 (395) 19-24 2015/01

    ISSN: 0913-5685

  117. A Novel Joint Handover and Base Station Sleep mode Algorithm in HetNet

    Rintaro Yoneya, Abolfazl Mehbodniya, Fumiyuki Adachi

    IEICE technical report :RCS2014-281 114 (394) 73-77 2015/01

    ISSN: 0913-5685

  118. Frequency-Domain Equalization Suitable for Single-Carrier Space-Frequency Block Coded Transmit Diversity in Frequency-Selective Fading Channel

    宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 114 (395(RCS2014 269-300)) 2015

    ISSN: 0913-5685

  119. Joint Tx/Rx MMSE Filtering for Uplink Single-Carrier MU-MIMO

    熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 114 (395(RCS2014 269-300)) 2015

    ISSN: 0913-5685

  120. Space-Time Block Coding for Cooperative Amplify-and-Forward Relay Using More Than 3 Relay Node Antennas

    遠藤力, 宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 114 (395(RCS2014 269-300)) 2015

    ISSN: 0913-5685

  121. UE-DA Dynamic Grouping for Distributed Antenna Network with MU-MIMO Transmission

    吉岡翔平, 熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 114 (490(RCS2014 301-372)) 2015

    ISSN: 0913-5685

  122. Joint Transmit/Receive MMSE-FDE & Spectrum Combining for SC-ANC Bi-Directional Relay in The Presence of Timing Offset

    宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 114 (490(RCS2014 301-372)) 2015

    ISSN: 0913-5685

  123. Space-Time Block Coded Amplify-and-Forward Relay with Cyclic Delay Diversity

    遠藤力, 宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 114 (490(RCS2014 301-372)) 2015

    ISSN: 0913-5685

  124. Adaptive 2-Dimensional Block Spreading for Downlink MC-CDMA Distributed Antenna Network

    盛夢都, 井下翔平, 宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 114 (490(RCS2014 301-372)) 2015

    ISSN: 0913-5685

  125. Joint Tx/Rx Filtering for Distributed Antenna Network Uplink with Single-Carrier MU-MIMO

    熊谷慎也, 吉岡翔平, 安達文幸

    電子情報通信学会技術研究報告 114 (490(RCS2014 301-372)) 2015

    ISSN: 0913-5685

  126. B-5-37 A Study of Interference-Aware Channel Segregation for HetNet Using Time-Division Channels

    Sugai Ren, Temma Katsuhiro, Mehbodniya Abolfazl, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2015 (1) 392 2015

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  127. B-5-56 Impact of Doppler Shift on Space-Time Block Coded AF Relay

    ENDO Chikara, MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2015 (1) 411 2015

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  128. B-5-57 Design of Band-Limiting Filter for Transmit/Receive-Cooperative SC-ANC Bi-Directional Relay

    MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2015 (1) 412 2015

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  129. Experimental Evaluation of Space-Time Block Coded Amplify-and-Forward Relay

    遠藤力, 宮崎寛之, 徳田清仁, 安達文幸

    電子情報通信学会技術研究報告 115 (113(RCS2015 46-99)) 2015

    ISSN: 0913-5685

  130. 送電線ディジタル電力線搬送の適応等化器を用いた温度変動における周波数オフセット補正方式の検討

    佐々木範雄, 花海丞, 織田健志, 安達文幸

    電気学会電子・情報・システム部門大会講演論文集(CD-ROM) 2015 2015

  131. Joint Tx/Rx MMSE Filtering for Downlink Single-Carrier MU-MIMO

    熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 115 (233(RCS2015 156-189)) 2015

    ISSN: 0913-5685

  132. たゆまぬ無線技術の発展と将来展望

    安達文幸

    NTT DOCOMOテクニカル・ジャーナル(Web) 23 (1) 2015

  133. Effect of Joint Tx/Rx Cooperative Signal Processing on Downlink Broadband MU-MIMO Transmissions in Distributed Antenna Network

    熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 115 (369(RCS2015 243-279)) 2015

    ISSN: 0913-5685

  134. Effect of Macro-cell Cooperation on Distributed Antenna Space-Time Block Coded Diversity

    宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 115 (369(RCS2015 243-279)) 2015

    ISSN: 0913-5685

  135. Poster Presentation : Optimum Number of Transmit Antennas for STTD in MC-CDMA Distributed Antenna Network (Smart Radio)

    MORI Yumeto, INOSHITA Shohei, MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    IEICE technical report. SR, Smart radio 114 (284) 15-20 2014/10/30

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Distributed antenna network (DAN) can mitigate the problems arising from of the propagation path loss and shadowing loss and achieve better transmission performance over the entire cell area compared to centralized antenna network (CAN). Many transmit antennas are spatially distributed in DAN while they are co-located at the same base station in CAN. The use of space time block coded transmit diversity (STTD) can further improve performance. As the multi-access scheme, multicarrier code division multiple access (MC-CDMA) is attractive since it can alleviate a sophisticated resource allocation while achieving the frequency diversity gain. In this paper, the STTD downlink transmission is considered for MC-CDMA DAN. In STTD downlink, higher spatial antenna diversity gain is obtained by increasing the number of transmit antennas. However, the STTD code rate reduces. Furthermore, since the propagation time delays of signals transmitted from some transmit antennas may exceed the cyclic prefix (CP) length of MC-CDMA, the inter-block interference (IBI) is produced. Therefore, there exist the optimum numbers of transmit antennas to be involved in STTD downlink. In this paper, we derive an expression for the received SINR after de-spreading and evaluate, by computer simulation, the STTD downlink capacity to discuss about the optimum number of transmit antennas.

  136. 不均一ユーザ分布環境におけるDS-CDMA DANのための適応アンテナ毎干渉キャンセラ(Poster session,国際ワークショップ)

    INOSHITA Shohei, MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    IEICE technical report. SR, Smart radio 114 (284) 7-13 2014/10/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    複数アンテナをセル内に分散配置する分散アンテナネットワーク(DAN)ではフェージングばかりではなく,シャドウイング損失および伝搬損失の影響を同時に低減でき,セル全域にわたって優れた伝送品質を達成できる.また擬似直交拡散符号を用いる直接拡散符号分割マルチアクセス(DS-CDMA)と干渉キャンセラを組み合わせることで,複雑なチャネル割り当て問題を回避しつつ,多数のユーザを同時に収容することが出来る.以前筆者らは,演算量を削減しつつ優れた上りリンク容量を達成するために,分散アンテナ毎にキャンセル対象ユーザを選択するアンテナ毎干渉キャンセラ(PAIC)を提案した.このPAICではキャンセルユーザ数を全ての分散アンテナで同じとしていたため,周辺に多数のユーザが存在するアンテナではキャンセルユーザ数が不足すること,周辺のユーザが少ないアンテナではキャンセルユーザ数が過剰であるという問題があった.そこで本稿ではユーザ分布の偏りの変化に対応してアンテナ毎のキャンセルユーザ数を適応的に変化させる適応アンテナ毎干渉キャンセラ(APAIC)を提案する.分散アンテナはそれぞれ固有のパイロット信号を送信する.各ユーザはパイロットの瞬時受信電力を測定し,レベルの大きい順にあらかじめ決められた本数分だけアンテナを選択し,選択したアンテナ全てにユーザ番号と選択順位を通知する.APAICでは,分散アンテナごとにそれを受信アンテナとして選択しているユーザおよびそのアンテナの選択順位を示すテーブルを作成する.各分散アンテナではそのテーブルを参照し,その中から受信アンテナとしての選択順位がしきい値以上のユーザをキャンセルする.計算機シミュレーションから,APAICはユーザ分布に偏りがある環境下で,高い上りリンク容量を達成できることを明らかにしている. Distributed antenna network (DAN), in which many antennas are spatially distributed, can mitigate the negative impact of not only the fading but also propagation path loss and shadowing loss, and accordingly, achieves a good transmission performance in entire the service area. Beside, the combination of direct-sequence code division multiple access (DS-CDMA) using quasi-orthogonal code and interference cancellation can accommodate many users in a cell while alleviating complex channel allocation problem. Recently, we proposed the per-antenna interference cancellation (PAIC) for DS-CDMA DAN in order to achieve a good uplink capacity while reducing computational complexity. In the conventional PAIC, the numbers of users to be cancelled in antenna whose coverage area has many and few users are insufficient and excessive respectively, because the number of users to be cancelled is the same among all distributed antennas. In this paper, we propose the adaptive per-antenna interference cancellation (APAIC) to change the number of users to be cancelled according to the user distribution. Distributed antennas transmit their own pilot signals. Each user selects the received antennas in the descending order of the instantaneous received pilot signal power and reports the user index and the rank of selected antenna to each of selected antennas. In APAIC, each antenna has a user table containing the indices of users who have selected that antenna and the ranks of that antenna. Each antenna looks up the user table and cancels the users who are selecting it higher than the prescribed ranking threshold. We show by computer simulation that our proposed APAIC achieves a higher uplink capacity than the conventional PAIC in an environment of non-uniform user distribution.

  137. Poster Presentation : A Study on Adaptability of Interference-Aware Channel Segregation To Varying CCI Environment: Smart Radio

    114 (284) 37-41 2014/10

    ISSN: 0913-5685

  138. Cooperative communications and sensing

    Qilian Liang, Victor C. M. Leung, Weixiao Meng, Fumiyuki Adachi

    WIRELESS COMMUNICATIONS & MOBILE COMPUTING 14 (13) 1201-1203 2014/09

    DOI: 10.1002/wcm.2513  

    ISSN: 1530-8669

    eISSN: 1530-8677

  139. Recent Advances in Distributed Antenna Network for Gigabit Communications

    Fumiyuki Adachi

    IEICE Proceeding Series 19 MOBILE1-1 2014/08/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI: 10.34385/proc.19.mobile1-1  

    eISSN: 2188-5079

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    Wireless networks must be restructured to cope with recent rapid popularity of smart phones. In the near future, everyone will be always connected to the network and will enjoy a variety of cloud computing data services (throughput per user ranges from a few kbps to close-to-giga bps) including voice/video conversation. Gigabit data services need prohibitively high transmit power and broad bandwidth if the present network architecture is employed. The available frequency bandwidth and power are too limited to provide gigabit data services to everyone. A new wireless network architecture that can efficiently utilize the limited bandwidth and significantly reduce the transmit power is required. One promising architecture is the distributed antenna network (DAN). In this talk, we will overview the concept of DAN and recent advances in dynamic frequency reusing, massive MIMO, multiple access, frequency-domain signal processing, etc., which are important elements in realizing DAN.

  140. Cyclic Delay Pilot Channel Estimation for Space-Time Block Coded Cooperative Amplify-and-Forward Relay

    ENDO Chikara, MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Technical report of IEICE. RCS 114 (164) 7-12 2014/07/30

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, we proposed space-time block coded (STBC) cooperative amplify-and-forward (Co-AF) relay (STBC-Co-AF relay) and showed that STBC-Co-AF relay outperforms Co-AF relay while keeping relay station structure simple. However, the past study for STBC-Co-AF relay assumed channel state information (CSI) of the channels of the source node-to-the relay node and the relay node-to-the destination node can be perfectly estimated at destination node. In this paper, we proposed cyclic delay pilot channel estimation (CDP-CE) for STBC-Co-AF relay. In the proposed scheme, pilot reverse modulation, conjugate operation and multiplying cyclic delay pilot are performed to the received signal from source node at the relay node, and then, the relay node amplifies and forwards it to the destination node. At the destination node, channel estimation is performed viewing a concatenation of the channels of the source node-to-the relay node link and the relay node-to-the destination node link as an equivalent channel. We evaluate, by the computer simulation, the average bit error rate (BER) performance and End-to-End throughput performance when using proposed CDP-CE for STBC-Co-AF relay and show that the effectiveness of proposed CDP-CE.

  141. Impact of Channel Estimation Error on Analog SC-FDE using STTD Combined with Receive Antenna Diversity

    VO Thanh Hai, KUMAGAI Shinya, ADACHI Fumiyuki

    Technical report of IEICE. RCS 114 (164) 19-24 2014/07/30

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In order to improve performance of analog signal transmission, we recently proposed a novel analog single-carrier transmission with frequency-domain equalization (analog SC-FDE). Additionally, we showed that a joint use of space-time transmit diversity (STTD) and receive antenna diversity significantly improves performance of our proposed analog SC-FDE under a perfect knowledge of channel state information at the receiver. In this paper, the well-known cyclic delay pilot channel estimation (CDP-CE) is considered and the impact of channel estimation error is studied for an application of analog SC-FDE to, as an example, radio broadcasting. It is shown, by computer simulation, that CDP-CE keeps the normalized mean square error (NMSE) performance similar to that under the perfect knowledge of channel state information even in a very high mobility environment.

  142. Imperfect Channel Estimation and Its Effect on Uplink FDMA Resource Management: 無線通信システム

    114 (86) 99-103 2014/06

    ISSN: 0913-5685

  143. Radio Resource Management for Next Generation Wireless Networks: 無線通信システム

    114 (8) 91-94 2014/04

    ISSN: 0913-5685

  144. B-5-52 Pseudo Block Coded OFDM Transmission Using Joint Frequency-Domain Equalization and Decoding

    MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2014 (1) 447-447 2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  145. Performance Comparison between Training Sequence Inserted OFDM and Single-carrier Transmission under Doubly-selective Fading Channel

    ONUMA Shinya, ABO Kohei, NAGAOKA Ryo, TEMMA Katsuhiro, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (456) 431-436 2014/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In training sequence (TS) inserted block transmission, since the TS can be utilized for channel estimation, no pilot block is needed. In this paper, using RLS-based frequency-domain channel estimation (RLS-CE) with polynomial prediction, we evaluate a bit error rate (BER) performance of TS inserted orthogonal frequency division multiplexing (TS-OFDM) transmission and single-carrier (TS-SC) transmission under doubly-selective (time- and frequency-selective) fading channel.

  146. Pseudo Block Coded Single-Carrier Transmission and Frequency-Domain Equalization and Decoding

    MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (456) 1-5 2014/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In block coded single-carrier (SC) transmission, maximum likelihood (ML) decoding is well known as the optimal decoding scheme. However, the computational complexity of ML decoding is extremely high. In block coded SC transmission, block encoding, interleaving, discrete Fourier transform (DFT) and mapping can be expressed by matrix operation. Therefore, the concatenation of block encoding matrix, interleaving matrix, DFT matrix, mapping matrix and channel matrix can be treated as an equivalent MIMO channel. In this paper, we propose pseudo block coded (SC) transmission and frequency-domain equalization and decoding. We call this scheme as pseudo block coded SC-FDE transmission. In the proposed scheme, treating the concatenation of block encoding matrix, interleaving matrix, DFT matrix, mapping matrix and channel matrix as an equivalent MIMO channel, frequency-domain equalization (FDE) and block decoding are jointly performed based on minimum mean square error (MMSE) criterion. We evaluate, by computer simulation, average bit error rate (BER) performance when using pseudo block coded SC-FDE transmission and show that frequency-domain equalization and decoding can achieve BER performance superior to 2 step decoding, in which FDE and hard decision block decoding are separately performed.

  147. User Selection MAI Canceller in DS-CDMA Distributed Antenna Network

    INOSHITA Shohei, MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (456) 13-18 2014/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Distributed antenna network (DAN), in which many antennas are spatially distributed, can mitigate the negative impacts of not only the fading but also the propagation path loss and the shadowing loss, and accordingly, achieves a good transmission performance in entire the service area. Recently, we investigated the uplink capacity of direct-sequence code division multiple access (DS-CDMA) DAN with extended diversity and showed that DS-CDMA DAN with extended diversity can achieve higher uplink capacity than single-carrier frequency division multiple access (SC-FDMA) DAN while DS-CDMA can alleviate complex channel allocation. However, the uplink capacity of DS-CDMA DAN is still limited even if extended diversity is applied due to multiple access interference (MAI). To achieve higher uplink capacity, we consider MAI canceller. In DAN, the number of simultaneously accessing users per antenna is few and hence, the uplink capacity can be improved by cancelling a few users with respect to each antenna. In this paper, we investigate the MAI canceller for DS-CDMA DAN. It is shown by computer simulation that DS-CDMA DAN achieves higher uplink capacity with low computational complexity for MAI canceller.

  148. A Study on the Throughput Performance of Distributed Antenna Transit/Receive Diversity in High Mobility Environments

    SUSANTO Jimmy Hadi, MIYAZAKI Hiroyuki, TEMMA Katsuhiro, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (456) 217-222 2014/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In next generation wireless communication systems, broadband data services are required even in high mobility environment. In conventional centralized antenna network (CAN), the received power at a location remote from BS significantly degrades due to propagation loss. Distributed antenna network (DAN) is an effective scheme to solve this problem. Recently, we have studied DAN using frequency-domain space-time block coded joint transmit/receive diversity (FD-STBC-JTRD). In DAN, some distributed antennas can always be visible from mobile terminal (MT) with a high probability, and hence, the channel is expected to be line-of-sight (LOS) channel. Therefore, the fading can be characterized as doubly-selective (time- and frequency-selective) Nakagami-Rice fading. In this paper, we introduce sparse channel estimation method which is suitable for doubly selective Nakagami-Rice fading and evaluate downlink throughput performance of FD-STBC-JTRD in DAN in high mobility environment by using computer simulation. It is shown that FD-STBC-JTRD performs better throughput performance in DAN compared to CAN even in high mobility environment.

  149. Analog SC-FDE using Space-Time Transmit Diversity Combined with Receive Antenna Diversity: 無線通信システム

    113 (456) 211-216 2014/03

    ISSN: 0913-5685

  150. Single-carrier Frequency-Domain CDMA: 無線通信システム

    113 (456) 19-23 2014/03

    ISSN: 0913-5685

  151. Fairness-Capacity Tradeoff for SC-FDMA/SDMA Transmission Scheme: 無線通信システム

    113 (456) 163-167 2014/03

    ISSN: 0913-5685

  152. Sophisticated Channel Estimation for Single-Carrier Space-Time Block Coded Time-Division Duplex Transmission with Multi-Block FDE

    MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    IEICE technical report. Signal processing 113 (385) 193-198 2014/01/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, we proposed a multi-block frequency-domain equalization (MB-FDE) for single-carrier (SC) space-time block coded (STBC) time-division duplex (TDD) transmission in high mobility environment and showed that, when perfect channel state information (CSI) case, MB-FDE can achieve a good BER performance in high mobility environment. However, when using actual channel estimation (CE), the performance improvement by MB-FDE decreases due to the CE error caused by rapid channel fluctuation. In this paper, we study sophisticated channel estimation for SC-STBC TDD transmission in high mobility environment. In the proposed channel estimation called as adaptive two-dimension MIMO channel estimation, MIMO channel estimation and time variation prediction are simultaneously performed by using multiple two-dimension filters which are jointly optimized based on minimum mean square error (MMSE) criterion. Furthermore, higher channel estimation accuracy is obtained by combining iterative channel estimation. We evaluate, by computer simulation, bit error rate (BER) performance when using the proposed CE and discuss effectiveness of the proposed CE.

  153. Time-Domain Selective Mapping Technique for Filtered SC-FDE: 無線通信システム

    114 (164) 13-18 2014

    ISSN: 0913-5685

  154. Error Correcting Code and Intereaving for Digital Power Line Carrier Systems.

    佐々木範雄, 花海丞, 織田健志, 安達文幸

    電気学会通信研究会資料 CMN-14 (1-7.9-15) 2014

  155. A Study of Capacity-Fairness Controllable Scheduling for SC-FDMA/SDMA Uplink

    岩田隆芳, 宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 113 (385(SIP2013 85-135)) 2014

    ISSN: 0913-5685

  156. Development of Wireless LAN Testbed Using Interference-Aware Channel Segregation Based Dynamic Multi-Channel Assignment Algorithm

    松村祐輝, 天間克宏, 熊谷智明, 石原浩一, ABEYSEKERA B. A. H. Sithira, 安達文幸

    電子情報通信学会技術研究報告 113 (456(RCS2013 306-396)) 2014

    ISSN: 0913-5685

  157. HARQ Throughput of Single-carrier MIMO Communication with Adaptive Multiplexing Order

    長岡諒, 熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 113 (456(RCS2013 306-396)) 2014

    ISSN: 0913-5685

  158. A Study of Impact of Shadowing Correlation on Interference-Aware Channel Segregation Based Dynamic Channel Assignment Using Beacon Signal

    菅井廉, SIRAIT Martin T. H., 松村祐輝, 天間克宏, 安達文幸

    電子情報通信学会技術研究報告 113 (456(RCS2013 306-396)) 2014

    ISSN: 0913-5685

  159. 送電線ディジタル電力線搬送方式に用いる適応等化器の発散防止について

    佐々木範雄, 花海丞, 織田健志, 安達文幸

    電気学会全国大会講演論文集(CD-ROM) 2014 2014

  160. Space-Time Block Coded Amplify-and-Forward Cooperative Relay Without Channel State Information at Relay Station

    遠藤力, 宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 114 (8(RCS2014 1-18)) 2014

    ISSN: 0913-5685

  161. Total Transmit Power Minimization under Per-Antenna Power Constraint for MIMO-SVD

    熊谷慎也, 安達宏一, SUN Sumei, 安達文幸

    電子情報通信学会技術研究報告 114 (86(RCS2014 32-88)) 2014

    ISSN: 0913-5685

  162. Single-Carrier MU-MIMO using Vector Perturbation

    吉岡翔平, 熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 114 (86(RCS2014 32-88)) 2014

    ISSN: 0913-5685

  163. Application of Non-linear Frequency-Domain Block Signal Detection to Pseudo Block Coded Single-Carrier Transmission

    宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 114 (86(RCS2014 32-88)) 2014

    ISSN: 0913-5685

  164. Joint Frequency-Domain Equalization and De-spreading Based on Belief Propagation for Multi-Code Direct Sequence Spread Spectrum Transmission

    宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 114 (164(RCS2014 89-138)) 2014

    ISSN: 0913-5685

  165. Highly Energy-Efficient Base Station ON/OFF Switching Algorithm for HetNet

    米谷凜太郎, MEHBODNIYA Abolfazl, 安達文幸

    電子情報通信学会技術研究報告 114 (254(RCS2014 156-196)) 2014

    ISSN: 0913-5685

  166. Received CCI Power Adjustment for Interference-Aware Channel Segregation Using Beacon Signal

    菅井廉, SIRAIT Martin T. H., 天間克宏, 石原浩一, ABEYSEKERA B. A. Hirantha S., 熊谷智明, 安達文幸

    電子情報通信学会技術研究報告 114 (254(RCS2014 156-196)) 2014

    ISSN: 0913-5685

  167. Single-Carrier Multi-User MIMO Applying Transmit Equalization and Tomlinson-Harashima Precoding in Time-Domain

    吉岡翔平, 熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 114 (254(RCS2014 156-196)) 2014

    ISSN: 0913-5685

  168. BI-1-4 MIMO STBC Relay in Unmanned Aircraft System

    ADACHI Fumiyuki, MIYAZAKI Hiroyuki, ENDO Chikara

    Proceedings of the Society Conference of IEICE 2014 (1) "SS-38"-"SS-39" 2014

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  169. Training sequence in adaptive equalizer for digital power line carrier systems.

    佐々木範雄, 花海丞, 織田健志, 安達文幸

    電子情報通信学会技術研究報告 114 (301(OFT2014 37-43)) 2014

    ISSN: 0913-5685

  170. ASK Modulated Digital Single-Sideband Transmission in a Frequency-Selective Channel

    阿保航平, VO Thanh Hai, BOONKAJAY Amnart, 安達文幸

    電子情報通信学会技術研究報告 114 (295(RCS2014 197-219)) 2014

    ISSN: 0913-5685

  171. Single-Carrier Multi-User MIMO with Time-Domain Transmit Equalization and THP Applying M Algorithm Based Perturbation Vector Search

    吉岡翔平, 熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 114 (372(RCS2014 220-268)) 2014

    ISSN: 0913-5685

  172. Orthogonal Code-Multiplexed Frequency-Domain Single-Carrier Spread Spectrum

    BOONKAJAY Amnart, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (361) 107-112 2013/12/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    The authors have proposed a frequency-domain single-carrier spread spectrum (SC-FDSS) transmission technique, which achieves better bit-error rate (BER) and better power amplifier-dependent energy efficiency comparing with time-domain spread spectrum (TDSS). However, its wider transmission bandwidth leads to low spectrum efficiency, implying that a multiplexing technique is necessary. In this paper, we introduce an orthogonal code multiplexing technique for the FDSS called multi-code single-carrier FDSS (MC-SC-FDSS) for code division multi-access. The signal block to be transmitted is firstly transformed into frequency-domain signal by discrete Fourier transform (DFT), and then code multiplexing is done to achieve narrower transmit bandwidth. Joint frequency-domain equalization based on minimum mean-square error criterion (MMSE-FDE) and de-spreading is carried out for acquiring frequency diversity gain. Theoretical analysis and simulation results in terms of BER and PAPR of both single-code and multi-code SC-FDSS are shown and compared with conventional TDSS and multi-carrier SS (MCSS)

  173. Uplink Capacity Comparison between DS-CDMA and SC-FDMA in Distributed Antenna Network

    INOSHITA Shohei, MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (361) 273-278 2013/12/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Distributed antenna network (DAN), in which many antennas are spatially distributed, can mitigate the negative impacts of not only the fading but also the propagation path loss and the shadowing loss, and accordingly, achieves a good transmission performance in the entire service area. Since the available bandwidth is limited, the multiple access technique, e.g., time division multiple access (TDMA), frequency division multiple access (FDMA), and direct-sequence code division multiple access (DS-CDMA), is needed. TDMA and FDMA respectively use the orthogonal time and frequency channels and the channel allocation is done based on the instantaneous channel state information of each user. On the other hand, in DS-CDMA, all users share the same frequency bandwidth since the interference can be suppressed by spreading/despreading process. Therefore, DS-CDMA does not require a complex channel allocation algorithm. However, fast transmit power control (TPC) and antenna diversity are essential. In this paper, we investigate the uplink capacity of DS-CDMA DAN and that of single carrier FDMA (SC-FDMA) DAN. It is shown by computer simulation that DS-CDMA DAN achieves higher uplink capacity than SC-FDMA DAN.

  174. Impact of Channel Estimation Error in Space-Time Block Coded Joint Transmit/Receive Diversity with Optimal Transmit FDE

    MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (246) 97-102 2013/10/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Single-Carrier (SC) transmission using frequency-domain space-time block coded joint transmit/receive diversity (FD-STBC-JTRD) combined with transmit frequency-domain equalization (FDE) obtains full spatial diversity gain while the channel state information (CSI) is required only at transmitter for transmit FDE. Recently, we derived the optimal transmit FDE weight for SC FD-STBC-JTRD and showed that the optimal transmit FDE can achieve 1/RSTBC times higher received signal-to-interference plus noise power ratio (SINR) than our previously proposed transmit FDE weight, where RSTBC denotes the STBC coding rate. However, the previous study for SC FD-STBC-JTRD with the optimal transmit FDE assumed Ideal channel estimation. In this paper, we derive the signal-to-interference plus noise power ratio (SINR) achievable by SC FD-STBC-JTRD using both the optimal transmit FDE and the cyclic delay pilot channel estimation (CDP-CE) and discuss how the channel estimation error affects the received SINR. Then, we evaluate, by computer simulation, the bit error rate (BER) performance and show the optimal number of pilot blocks.

  175. Joint Tx/Rx MMSE Filtering for Single-Carrier MIMO Spatial Multiplexing Using Iterative Interference Canceller

    KUMAGAI Shinya, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (246) 115-120 2013/10/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, we proposed a joint transmit/receive spatial/frequency filtering based on minimum mean square error criterion (joint Tx/Rx MMSE filtering) using the channel state information (CSI) at both transmitter and receiver for broadband single-carrier (SC) multiple-input multiple-output (MIMO) spatial multiplexing. The residual inter-symbol interference (ISI) after joint Tx/Rx MMSE filtering limits the improvement of transmission performance. The introduction of iterative interference canceller (I^2C) is effective to suppress the residual ISI and further improve the transmission performance. In this paper, we propose a new joint Tx/Rx MMSE filtering for SC-MIMO spatial multiplexing using I^2C and derive the optimal Tx/Rx filters which take the I^2C at the receiver into account. We show, by computer simulation, that the use of joint Tx/Rx MMSE filtering and I^2C can significantly improve the average bit error rate (BER) performance of turbo coded SC-MIMO spatial multiplexing.

  176. Experimental Study of Interference-Aware Channel Segregation Based Dynamic Channel Assignment in IEEE802.11 Wireless LANs

    Matsumura Yuki, Temma Katsuhiro, Ishihara Koichi, Abeysekera B.A.Hirantha Sithira, Kumagai Tomoaki, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 2013 (1) 452 2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  177. Uplink Capacity of DS-CDMA Distributed Antenna Network

    INOSHITA Shohei, MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (194) 1-6 2013/08/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Distributed antenna network (DAN), in which many antennas are spatially distributed in each radio cell, can mitigate the impacts of the propagation path loss, the shadowing loss, and the frequency-selective multipath fading and achieves a good transmission performance in the entire radio cell. The multiple access (MA) has two types: orthogonal MA and non-orthogonal MA. The time division multiple access (TDMA) and frequency division multiple access (FDMA), both of which are the type of orthogonal MA, require a complex channel assignment. To alleviate such a complexity problem, we consider the code division multiple access (CDMA) which is the type of non-orthogonal MA. In this paper, we investigate the uplink capacity of DAN using direct-sequence CDMA (DS-CDMA) with joint minimum mean square error based frequency domain-equalization (MMSE-FDE)/antenna diversity. It is shown by the computer simulation that DS-CDMA DAN reduces the required transmit power and obtains larger uplink capacity than conventional centralized antenna network (CAN) using DS-CDMA, where multiple antennas are co-located at a base station (BS) in the cell center.

  178. Disaster-resilient Multilayered Communications Network

    Fumiyuki Adachi

    IEICE Proceeding Series 16 COMM2-1 2013/07/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI: 10.34385/proc.16.comm2-1  

    eISSN: 2188-5079

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    Following the Great East Japan Earthquake, Ministry of Internal Affairs and Communications of Japan initiated many R&D programs to establish new communication system in the case of a disaster or emergency. In this talk, some details concerning the multilayered communication network will be presented.

  179. Optimal Transmit FDE Weight for Space-Time Block Coded Joint Transmit/Receive Diversity

    MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (130) 209-214 2013/07/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Single-Carrier (SC) transmission using frequency-domain space-time block coded joint transmit/receive diversity (FD-STBC-JTRD) combined with transmit frequency-domain equalization (FDE) obtains full spatial diversity gain while the channel state information (CSI) is required only at transmitter for transmit FDE. In our previous study of SC FD-STBC-JTRD, single transmit FDE weight matrix was used while the STBC code-word composed of sequence of coded data blocks. In this paper, we derive the optimal transmit FDE weight design for SC FD-STBC-JTRD. In the optimal transmit FDE weight design, multiple transmit FDE weight matrices, each associated with each block in a STBC code-word, are used unlike our previous transmit FDE weight design. The transmit FDE weight matrices are jointly optimized based on the minimization of the mean square error (MSE) between the transmitted signal before STBC encoding at the transmitter and the received signal after STBC decoding at the receiver. We show by theoretical analysis that the optimal transmit FDE weight design can achieve 1/RSTBC times higher received signal-to-interference plus noise power ratio (SINR) than our previous transmit FDE weight design, where RSTBC denotes the STBC coding rate. Then, we show by the computer simulations that the optimal transmit FDE weight design improves the BER performance compared to the previous transmit FDE weight design.

  180. Energy Efficiency of Spread Spectrum Single-Carrier Transmission

    BOONKAJAY Amnart, ADACHI Koichi, SUN Sumei, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (93) 219-223 2013/06/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Energy efficiency (EE), which is defined as a ratio of spectrum efficiency (SE) to power consumption, is a key performance metric in mobile communication system. The signal waveform has little influence on energy consumption of analog circuit and baseband unit. On the other hand, the energy consumption of power amplifier (PA) highly depends on signal waveform. The power amplifier efficiency (PAE) generally depends on the signal power (equivalently signal amplitude) and decreases as the signal amplitude becomes smaller. If the signal exhibits large peak-to-average power ratio (PAPR), the transmit power needs to be backed off so that the peak signal amplitude is linearly amplified. This results in a poor PAE as the operation point of PA is far below its maximum. The authors previously proposed a single-carrier with frequency domain spread spectrum (SC-FDSS). In this paper, the EE and SE of SC-FDSS are compared to those of SC with conventional time-domain spread spectrum (SC-TDSS). We also observe an optimum spreading factor (SF) for each spreading scheme which gives good SE-EE tradeoff at particular received signal-to-noise power ratio (SNR).

  181. Gigabit Wireless Signal Processing and Networking

    ADACHI Fumiyuki

    113 (19) 13 2013/04/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

  182. HARQ Throughput of Adaptive Single-carrier MIMO Transmission with Joint Tx/Rx Filtering in Distributed Antenna Network

    KUMAGAI Shinya, OBARA Tatsunori, YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Technical report of IEICE. RCS 113 (8) 81-86 2013/04/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In the conventional cellular network (CN) whose antennas are co-located at the center of the cell, the throughput near the cell edge significantly degrades due to the degradation of the received signal power. Distributed antenna network (DAN) whose antennas are distributed over the entire cell can solve this problem. In DAN, high received signal power can be obtained over the entire cell because the mobile terminal can access the nearby antennas with a high probability. Therefore, the throughput can be increased over the entire cell by performing multiple-input multiple-output (MIMO) spatial multiplexing with multiple distributed antennas. In this paper, we evaluate, by computer simulation, the hybrid automatic repeat request (HARQ) throughput distribution in DAN of the adaptive single-carrier (SC)-MIMO transmission with minimum mean square error (MMSE) based joint transmit and receive filtering which was recently proposed by us. It is shown that DAN can improve the downlink throughput especially near the cell edge compared to CN and the proposed transmission method can improve the throughput especially in DAN compared to the conventional SC-MIMO spatial multiplexing with receive MMSE filtering.

  183. Adaptive Sparse Channel Estimation Methods for Time-Variant MIMO : Communication Systems: 無線通信システム

    113 (8) 107-112 2013/04

    ISSN: 0913-5685

  184. B-5-108 PAPR Reduction Effect of Selective Mapping for Single-Carrier Joint Transmit/Receive Frequency-Domaln Equalization

    Amnart Boonkaj ay, OBARA Tatsunori, YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2013 (1) 518 2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  185. B-5-73 A Study of Uplink Capacity of DS-CDMA Distributed Antenna Network

    INOSHITA Shohei, MIYAZAKI Hiroyuki, OBARA Tatsunori, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2013 (1) 483-483 2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  186. Adaptive Single-carrier MIMO Transmission with Joint Tx/Rx MMSE Filtering

    KUMAGAI Shmya, OBARA Tatsunori, YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Technical report of IEICE. RCS 112 (443) 91-96 2013/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, we proposed an adaptive single-carrier (SC) multiple-input multiple-output (MIMO) transmission using joint transmit/receive minimum mean square error based filtering (joint Tx/Rx MMSE filtering) to improve the transmission performance of broadband SC-MIMO spatial multiplexing. The proposed method transforms the MIMO channel to the eigenmodes and allocates the transmit power based on MMSE criterion by joint Tx/Rx MMSE filtering. Also, as the received signal-to-interference plus noise power ratio (SINR) of each eigenmode is significantly different, rank adaptation and adaptive modulation are jointly introduced to narrow the received SINR gap between each eigenmode. For wireless packet communications, hybrid automatic repeat-request (HARQ) plays an important role as the error control technique to achieve a higher throughput performance. In this paper, we propose an HARQ packet transmission method of adaptive SC-MIMO with joint Tx/Rx MMSE filtering. The superiority of the proposed method is confirmed by computer simulation.

  187. Single-carrier MIMO Adaptive Multiplexing Order Selecting Transmission Using Cyclic Delay Pilot Channel Estimation

    NAGAOKA Ryo, KUMAGAI Shinya, YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Technical report of IEICE. RCS 112 (443) 73-78 2013/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    There is a trade-off between the spatial diversity and the spatial multiplexing in multiple-input multiple-output (MIMO) systems which use multiple transmit and receive antennas. In a conventional cellular networks, the throughput can be increased near the center of the cell by the spatial multiplexing because the received signal-to-interference plus noise power ratio (SINR) is high. On the other hand, near the cell edge, the spatial diversity is effective because the impacts of path loss and co-channel interference (CCI) from neighboring cells which use the same frequency are large. Recently, we showed that the maximum throughput can be achieved by adaptively controlled the trade-off between the spatial diversity and the spatial multiplexing assuming a single-carrier (SC) MIMO transmission. However, in the previous study, we assumed the ideal channel estimation. In this paper, we discuss the impact of cyclic delay pilot channel estimation (CDP-CE) on the throughput of MIMO adaptive multiplexing order selecting transmission. The multiplexing order is selected using the channel estimate and (interference+noise) power estimate obtained from CDP-CE. We evaluate the throughput by computer simulation and discuss the impact of the channel estimation error.

  188. Transmission Performances of Transmit/Receive Diversity in Single Carrier Single Frequency Network under Frequency-Selective Nakagami-Rice Fading Environment

    SUSANTO Jimmy Hadi, MIYAZAKI Hiroyuki, TEMMA Katsuhiro, OBARA Tatsunori, YAMAMOTO Tetsuva, ADACHI Fumiyuki

    Technical report of IEICE. RCS 112 (443) 85-90 2013/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In the next generation mobile radio communication systems, high-speed and uniform communication service is demanded even under high mobility environment such as high-speed trains. In conventional networks, communication area covered by one radio base station is limited, so the received signal power at a location remote from the radio base station is significantly reduced due to propagation loss. Transmit/receive antenna diversity in single frequency network (SFN) formed by multiple distributed antenna has been studied as an effective technique to solve these problems. In distributed antenna network (DAN), the channel is expected as Nakagami-Rice fading channel since the communication between base station and mobile terminal will be a line-of-sight communication In this paper, the channel model for frequency-selective Nakagami-Rice fading in distributed antenna SFN is presented first. Then the performance of downlink SFN transmit/receive diversity in high mobility environment is evaluated by computer simulation.

  189. Sparse Channel Estimation for MIMO-OFDM Amplify-and-Forward Two-Way Relay Networks

    GUI Guan, ADACHI Fumiyuki

    Technical report of IEICE. RCS 112 (424) 207-212 2013/01/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Accurate channel impulse response (CIR) is required for coherent detection and it can also help improve communication quality of service in next-generation wireless communication systems. One of the advanced systems is multi-input multi-output orthogonal frequency-division multiplexing (MIMO-OFDM) amplify and forward two-way relay networks (AF-TWRN). Linear channel estimation methods, e.g., least square (LS), have been proposed to estimate the CIR. However, these methods never take advantage of channel sparsity and then cause performance loss. In this paper, we propose a sparse channel estimation method to exploit the sparse structure information in the CIR at each end user. Sparse channel estimation problem is formulated as compressed sensing (CS) using sparse decomposition theory and the estimation process is implemented by LASSO algorithm. Computer simulation results are given to confirm the superiority of proposed method over the LS-based channel estimation method.

  190. Timing Offset Detection by Using Phase Only Correlation for Distributed Antenna Network

    Peng Wei, Adachi Fumiyuki

    Technical report of IEICE. RCS 112 (424) 249-252 2013/01/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In our previous study, a single carrier frequency domain adaptive antenna array (SC-FDAAA) has been proposed for distributed antenna network (DAN) system to suppress multiple access interference (MAI). However, the timing offset between users and antennas have not been considered. In this study, asynchronous detection in the uplink transmission of DAN system is considered and a phase only correlation (POC) based timing offset estimation algorithm is proposed for DAN system. The effectiveness of the proposed algorithm has been verified by simulation results.

  191. R&D Project of Multilayered Communications Network : For disaster-resilient communications

    ADACHI Fumiyuki, KISHI Yoji, OHMORI Shingo, TAKEUCHI Kazunori, HAMAGUCHI Masaharu, KAJIWARA Ryo

    IEICE technical report 112 (407) 15-16 2013/01/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Learning from lessons of The Great East Japan Earthquake in March 2011, MIC (Ministry of Internal Affairs and Communications) of Japanese Government has initiated many R&D programs in order to establish new communications systems which are robust, resilient, and dependable in case of disaster and emergency. Our joint proposal "Multilayered communications network" by Tohoku University, KDDI R&D Laboratories, KDDI Corporation, and OKI Electric Industry has been accepted by MIC and the R&D project has started this March. The project is being carried out in collaboration with NICT (National Institute of Information and Communications Technology) and YRP (Yokosuka Research Park). This paper gives the concept of "Multilayered communications network" and introduces R&D subjects of the project.

  192. A New Multi-Attribute Base-Station Association Technique for Hybrid Wireless Networks: 無線通信システム

    112 (443) 145-149 2013

    ISSN: 0913-5685

  193. Least Mean Square Algorithm with Application to Improved Adaptive Sparse Channel Estimation: 無線通信システム

    112 (443) 447-452 2013

    ISSN: 0913-5685

  194. Multi-user Timing Offset Detection Distributed Antenna Network: 無線通信システム

    112 (443) 369-373 2013

    ISSN: 0913-5685

  195. 周波数と電力効率に優れたブロードバンド無線通信技術の実現に向けて

    安達文幸

    パナソニック技報 58 (4) 2013

    ISSN: 1883-115X

  196. B-5-92 Astudy on analog signal transmission using SC-FDMA

    Vo Thanh Hai, Kumagai Shinya, Obara Tatsunori, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2013 (1) 502 2013

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  197. B-5-89 Study on Single-carrier STBC Diversity using Cyclic Delay Pilot Channel Estimation

    Yoshioka Shohei, Kumagai Shinya, Yamamoto Tetsuya, Obara Tatsunori, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2013 (1) 499 2013

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  198. B-5-25 Throughput Performance of MIMO-ANC SC Bi-Directional Relay Using Cyclic Shifted Pilot Charmel Estimation

    Miyazaki Hiroyuki, Obara Tatsunori, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2013 (1) 435 2013

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  199. B-5-20 Impact of power allocation on single-canier eigenmode MIMO transmission

    Kumagai Shinya, Obara Tatsunori, Yamamoto Tetsuya, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2013 (1) 430 2013

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  200. B-5-91 A Study on SC-FDE Using Partial Response Filter

    Abo Kohei, Amnart Boonkaj ay, Yamamoto Tetsuya, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2013 (1) 501 2013

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  201. B-5-122 Study on Frequency-Domain Equalization for Training Sequence Inserted B lock Transmissions

    Yamamoto Tetsuya, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2013 (1) 532 2013

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  202. Analog Network Coded SC/OFDM Hybrid Bi-Directional Relay Communications Using Adaptive Modulation and Coding

    宮崎寛之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 112 (443(RCS2012 284-366)) 2013

    ISSN: 0913-5685

  203. User Scheduling for Uplink SC-FDMA with Subcarrier-Blocking

    岩田隆芳, 木村和裕, 宮崎寛之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 112 (443(RCS2012 284-366)) 2013

    ISSN: 0913-5685

  204. Adaptive Modulation Assignment For Uplink Single Carrier Cooperative DF Relay with Multi-Antenna Using Direct/ Cooperative DF Relay Switching

    木村和裕, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 112 (443(RCS2012 284-366)) 2013

    ISSN: 0913-5685

  205. Spectrum Assignment in Multi-hop Relay with Diversity

    松野貴徳, 木村和裕, 宮崎寛之, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 112 (443(RCS2012 284-366)) 2013

    ISSN: 0913-5685

  206. Throughput Performance of SC-FDMA using Overlap FDE

    小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 112 (443(RCS2012 284-366)) 2013

    ISSN: 0913-5685

  207. A Study of Impact of Asynchronous Transmission Timing on Channel Segregation Based Dynamic Channel Assignment in Wireless LAN

    松村祐輝, 天間克宏, 小原辰徳, 山本哲矢, 石原浩一, HIRANTHA SITHIRA A. B. A., 熊谷智明, 安達文幸

    電子情報通信学会技術研究報告 112 (443(RCS2012 284-366)) 2013

    ISSN: 0913-5685

  208. A Study of Channel Selection for Wireless LAN using Channel Segregation Based Dynamic Channel Assignment

    天間克宏, 松村祐輝, 小原辰徳, 山本哲矢, 石原浩一, HIRANTHA SITHIRA A. B. A., 熊谷智明, 安達文幸

    電子情報通信学会技術研究報告 112 (443(RCS2012 284-366)) 2013

    ISSN: 0913-5685

  209. A Study on Energy Efficiency of Distributed Antenna Network

    嘉治英俊, 熊谷慎也, 天間克宏, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 112 (443(RCS2012 284-366)) 2013

    ISSN: 0913-5685

  210. B-8-21 Adaptive Modulation Assignment for Uplink SC Cooperative DF Relay Using Turbo Coding

    Kimura Kazuhiro, Miyazaki Hiroyuki, Obara Tatsunori, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2013 (2) 256 2013

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  211. Study on Frequency-Domain Channel Estimation Using Polynomial Prediction for Training Sequence Inserted Single-Carrier Block Transmission

    山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 112 (443(RCS2012 284-366)) 2013

    ISSN: 0913-5685

  212. SSB Transmission using Analog SC-FDE

    VO Thanh Hai, 熊谷慎也, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 113 (93(RCS2013 37-77)) 2013

    ISSN: 0913-5685

  213. Study on Performance Improvement of SC-FDE Using Duobinary Partial Response Filter

    阿保航平, BOONKAJAY Amnart, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 113 (93(RCS2013 37-77)) 2013

    ISSN: 0913-5685

  214. Single-carrier MIMO Transmission Using Adaptive Selection of Modulation Level and Spatial Multiplexing Order

    長岡諒, 熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 113 (194(RCS2013 123-141)) 2013

    ISSN: 0913-5685

  215. Effect of STBC Diversity on Single-Carrier Multi-User MIMO Downlink using Tomlinson-Harashima Precoding

    吉岡翔平, 熊谷慎也, 安達文幸

    電子情報通信学会技術研究報告 113 (194(RCS2013 123-141)) 2013

    ISSN: 0913-5685

  216. Interference Canceller for Multi-hop Relay with Diversity

    松野貴徳, 宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 113 (246(RCS2013 142-173)) 2013

    ISSN: 0913-5685

  217. A study of Interference-Aware Channel Segregation Based Dynamic Channel Assignment for Heterogeneous Networks

    Matsumura Yuki, Temma Katsuhiro, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 2013 (1) 405 2013

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  218. Throughput Performance in Ground-to-UAS Multi-link MIMO Cooperative Relay

    MIYAZAKI Hiroyuki, ADACHI Fumiyuki

    Proceedings of the Society Conference of IEICE 2013 (1) 402 2013

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-144X

  219. 6.1 Challenges for Dependable Public Wireless Systems(6. Connectivity,<Special Survey>Dependable VLSI System)

    ADACHI Fumiyuki

    The Journal of Reliability Engineering Association of Japan 35 (8) 467-468 2013

    Publisher: Reliability Engineering Association of Japan

    DOI: 10.11348/reajshinrai.35.8_467  

    ISSN: 0919-2697

    eISSN: 2424-2543

  220. History and future perspective of cellular mobile communications technology

    安達文幸

    電子情報通信学会技術研究報告 113 (246(RCS2013 142-173)) 2013

    ISSN: 0913-5685

  221. FDE Weight for Single-Carrier Space-Time Block Coded Time Division Duplex Transmission in High Mobility Environment

    宮崎寛之, 安達文幸

    電子情報通信学会技術研究報告 113 (361(RCS2013 206-254)) 2013

    ISSN: 0913-5685

  222. IEEE802.11無線LANにおける干渉電力測定に基づいてチャネルを棲み分ける動的チャネル配置の実験的検討

    松村祐輝, 天間克宏, 石原浩一, ABEYSEKERA B.A. Hirantha S., 熊谷智明, 安達文幸

    電子情報通信学会大会講演論文集(CD-ROM) 2013 2013

    ISSN: 1349-144X

  223. Impact of Replica Length Reduction on Imperfect Circular Property Restoration: 無線通信システム

    112 (351) 287-290 2012/12

    ISSN: 0913-5685

  224. Joint Transmit/Receive MMSE-FDE for Single-Carrier Bi-Directional Relay Communications Using Multi-Relay Analog Network Coding

    MIYAZAKI Hiroyuki, OBARA Tatsunori, ADACHI Fumiyuki

    Technical report of IEICE. RCS 112 (89) 175-180 2012/06/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, we proposed a joint transmit/receive MMSE-FDE for multi-input multi-output (MIMO)-ANC, in which a relay station (RS) is equipped with multiple antennas. Introducing joint transmit/receive FDE to multi-relay ANC obtain higher spatial diversity gain and accordingly achieve higher throughput performance. In multi-relay ANC, each RS need to know the channel state information (CSI) of mobile terminal (MT) - all RSs - base station (BS). However, this is impractical. Therefore, in this paper, we propose a suboptimal multi-relay ANC with joint transmit/receive FDE, in which each RS requires the CSI of MT - itself - BS for determining the joint transmit/receive FDE weight. In this paper, we derive the suboptimal joint transmit/receive FDE weight. We evaluate, by the computer simulation, the throughput performances of the uplink and downlink using multi-relay ANC with the proposed suboptimal transmit/receive FDE and show the proposed suboptimal joint transmit/receive FDE can achieve close throughput performance compared to the optimal joint transmit/receive FDE.

  225. HARQ Throughput of Single-carrier MIMO Spatial Multiplexing with Joint Tx/Rx MMSE Filtering

    KUMAGAI Shinya, OBARA Tatsunori, YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Technical report of IEICE. RCS 112 (89) 105-110 2012/06/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    For wireless packet communications, hybrid automatic repeat-request (HARQ) is an indispensable technique. Recently, we proposed a joint transmit/receive filtering based on the minimum mean square error criterion (joint Tx/Rx MMSE filtering) to improve the transmission performance of broadband single-carrier (SC) multiple-input multiple-output (MIMO) spatial multiplexing. In this paper, we propose a joint Tx/Rx MMSE filtering for HARQ with SC-MIMO spatial multiplexing and packet combining. At each retransmission of the same packet, joint Tx/Rx MMSE filtering is carried out so as to minimize the MSE after packet combining. The throughput performance of turbo-coded HARQ with SC-MIMO spatial multiplexing and joint Tx/Rx MMSE filtering is evaluated by computer simulation.

  226. B-5-13 Iterative overlap QRM-ML Block Signal Detection for Single Carrier MIMO Spatial Multiplexing without CP Insertion

    MOROGA Hideyuki, YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2012 (1) 412-412 2012/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  227. Uplink Capacity of Cellular System Using Frequency Domain Adaptive Antenna Array: 無線通信システム

    111 (451) 199-203 2012/03

    ISSN: 0913-5685

  228. MSE Analysis and Throughput Performance of Pilot-assisted Channel Estimation Scheme for OFDM ANC Systems: 無線通信システム

    111 (451) 323-328 2012/03

    ISSN: 0913-5685

  229. A New Intelligent Radio Resource Management Technique for Heterogeneous Wireless Networks: 無線通信システム

    111 (451) 247-251 2012/03

    ISSN: 0913-5685

  230. Study on the Capacity of Distributed Antenna Network System by Using Frequency Domain Adaptive Antenna Array: 無線通信システム

    111 (451) 193-197 2012/03

    ISSN: 0913-5685

  231. Effect of Gaussian Channel Estimation Error on IBI Cancellation and Circular Property Loss Restoration for Broadband DS-CDMA Combining FDE Without CP Insertion

    ZHNEG Min, PENG Wei, ADACHI Fumiyuki

    Technical report of IEICE. RCS 111 (451) 175-180 2012/02/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In broadband DS-CDMA uplink transmission using frequency-domain equalization (FDE) without cyclic prefix (CP) insertion, the transmission performance degrades due to inter block interference (IBI) and circular property loss. The schemes were proposed to solve the problems of IBI and circular property loss in our previous study with the assumption of perfect channel estimation. In this paper, the Gaussian error channel model is used and the effect of estimating accuracy on the bit error rate (BER) is discussed. The requirement for practical channel estimation is also given based on the result.

  232. Joint Transmit/Receive MMSE-FDE for MIMO Analog Network Coding in Single-Carrier Bi-Directional Relay Communications

    MIYAZAKI Hiroyuki, NAKADA Masayuki, OBARA Tatsunori, ADACHI Fumiyuki

    Technical report of IEICE. RCS 111 (451) 95-100 2012/02/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this paper, we propose a joint transmit/receive frequency-domain equalization (FDE) based on minimum mean square error (MMSE) criterion for multi-input multi-output (MIMO) analog network coding (ANC) in bi-directional relay communications. In the proposed joint transmit/receive FDE, the relay station (RS) equipped with multiple antennas carries out the antenna diversity transmission using transmit FDE and the base station (BS) and the mobile terminal (MT) receivers, both equipped with single antenna, carry out the receive FDE only. In ANC bi-directional relay, the transmit FDE at RS which can simultaneously minimize the mean square error (MSE) for both uplink and downlink does not exist. Therefore, we derive the joint transmit/receive FDE optimized for either uplink or downlink. We evaluate, by the computer simulation, the BER performances of the uplink and downlink using the proposed joint transmit/receive FDE to show that almost the same BER performance is achieved for uplink and downlink even if the joint transmit/receive FDE is optimized for either link.

  233. Joint Transmit/Receive MMSE filtering for Single-carrier MIMO Spatial Multiplexing

    KUMAGAI Shinya, MATSUKAWA Ryusuke, OBARA Tatsunori, YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Technical report of IEICE. RCS 111 (451) 335-340 2012/02/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Multiple-input multiple-output (MIMO) spatial multiplexing is a powerful technique to increase the transmission rate. However, in single-carrier (SC) block transmission, MIMO spatial multiplexing suffers from the inter-symbol interference (ISI) as well as the inter-antenna interference (IAI). In this paper, we propose a new transmission method of SC-MIMO spatial multiplexing with frequency-domain joint transmit/receive filtering using the channel state information (CSI) both at the transmitter and receiver. The transmit and receive filters are derived based on the minimum mean square error (MMSE) criterion. The proposed filters can cancel the IAI by transforming the MIMO channel to the eigenmodes and significantly suppress the ISI by applying the joint transmit/receive frequency-domain equalization based on the MMSE criterion (joint transmit/receive MMSE-FDE) to each eigenmode. Throughput performance of the proposed method is evaluated by computer simulation. It is shown that the proposed method outperforms the receive MMSE filtering which uses the CSI only at the receiver.

  234. Study on IBI cancellation and CP restoration in DS-CDMA uplink transmission

    ZHENG Min, PENG Wei, ADACHI Fumiyuki

    111 (403) 37-41 2012/01/19

    ISSN: 0913-5685

  235. The Effect of Antenna Separation Distance on the Single-carrier Frequency Domain Adaptive Antenna Array

    PENG Wei, ADACHI Fumiyuki

    Technical report of IEICE. RCS 111 (404) 217-219 2012/01/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In our previous study, the single-carrier frequency domain adaptive antenna array (SC-FDAAA) was proposed for single-carrier transmission. The performance of FDAAA was studied using the assumption of independent channel gains among different antenna elements in the antenna array. However, the orthogonality among antennas may not be a practical assumption. In this paper, we will study the case where correlation among antennas is considered. The correlation between antennas is determined by the radiation pattern and separation distance between different antenna elements. We will focus on the effect of antenna separation distance in this paper.

  236. Downlink HARQ Throughput of Distributed Antenna Network with Space-Time Block Coded-Joint Transmit/Receive Diversity in a Multi-cell Environment

    MATSUKAWA Ryusuke, OBARA Tatsunori, ADACHI Fumiyuki

    Technical report of IEICE. RCS 111 (404) 205-210 2012/01/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Distributed antenna network (DAN), in which a group of multiple antennas are distributed in a cell, can mitigate not only the variations of the local average received signal power due to path loss but also the negative impacts of shadowing and frequency-selective fading. In our previous work, we investigated the performance of the DAN downlink transmission using frequency-domain space-time block coded-joint transmit/receive diversity (FD-STBC-JTRD) and hybrid automatic repeat request (HARQ), and showed that the proposed system achieves high throughput performance over the entire cell, even with low transmit power. However, how co-channel interference (CCI) affects the throughput performance of proposed system has not been investigated. In this paper, introducing frequency reuse in a multi-cell environment of the DAN, we evaluate the throughput performance of the downlink DAN in the presence of CCI. Computer simulation results show that the DAN can achieve high outage throughput performance by reducing CCI and realizing universal frequency reuse.

  237. HARQ Throughput of Single-carrier Distributed Antenna MIMO Spatial Multiplexing Using Near Maximum Likelihood Detection

    YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Technical report of IEICE. RCS 111 (404) 199-204 2012/01/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Multiple-input multiple-output (MIMO) spatial multiplexing provides very high spectrum efficiency. However, in conventional cellular network (CN), in which antennas are centralized at the center of the wireless cell, the transmission rate of a user close to the cell edge significantly degrades because the received signal-to-noise power ratio (SNR) or signal-to-interference plus noise power ratio (SINR) degrades. Distributed antenna network (DAN), in which many antennas are spatially distributed over the cell, can solve this problem. In DAN, since some antennas can always be visible from an MT with a high probability, the received signal power improves over the entire cell. In our previous works, we showed the channel capacity distribution of MIMO spatial multiplexing in DAN. In this paper, we study the spatial distribution of the throughput of single-carrier (SC) MIMO packet transmission using hybrid automatic repeat request (HARQ) and a near maximum likelihood signal detection in DAN. First, we evaluate, by computer simulation, the spatial distribution of the uplink throughput achievable by DAN and CN in a single-cell environment and show that DAN can significantly reduce the required transmit power compared to CN and it can achieve high throughput over the entire cell. In a multi-cell environment, we discuss the impact of the frequency reuse factor on the uplink throughput of DAN and CN and show that DAN can reduce the frequency reuse factor and achieves higher throughput normalized by the frequency reuse factor compared to CN.

  238. Adaptive Single-carrier MIMO Transmission with Joint Tx/Rx MMSE Filtering

    熊谷慎也, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 112 (351(RCS2012 184-237)) 2012

    ISSN: 0913-5685

  239. Joint Frequency-domain Equalization & Spectrum Combining for Transmit Filtered Single-carrier Transmission without CP insertion

    小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 111 (403(SIP2011 78-126)) 2012

    ISSN: 0913-5685

  240. A Study Of Relay Preselection In Single-Carrier Cooperative AF Relay Network

    中田雅之, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (403(SIP2011 78-126)) 2012

    ISSN: 0913-5685

  241. B-5-14 The effect of channel estimation on the performance of single-carrier transmission using QRM-MLBD

    YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2012 (1) 413 2012

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  242. B-5-29 Channel Capacity Improvement of Multi-user MIMO on Distributed Antenna Network

    Kumagai Shinya, Matsukawa Ryusuke, Obara Tatsunori, Yamamoto Tetsuya, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2012 (1) 428 2012

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  243. Theoretical Analysis of Frequency-domain Space-Time Block Coded-Joint Transmit/Receive Diversity

    松川隆介, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 111 (451(RCS2011 316-375)) 2012

    ISSN: 0913-5685

  244. Study on Frequency-domain Iterative Channel Estimation for Training Sequence Aided Single-carrier Transmission

    山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (451(RCS2011 316-375)) 2012

    ISSN: 0913-5685

  245. Channel Capacity Of Uplink Single-Carrier Cooperative AF Relay Using Direct/Cooperative Relay Switching In A Multi-Cell Envirionment

    中田雅之, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (451(RCS2011 316-375)) 2012

    ISSN: 0913-5685

  246. B-5-75 Study on the impact of the channel estimation error in single-carrier bi-directional relay communications using MIMO analog network coding

    MIYAZAKI Hiroyuki, NAKADA Masayuki, OBARA Tatsunori, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2012 (1) 474 2012

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  247. Adaptive Modulation Assignment For Uplink Single Carrier Cooperative DF Relay Using Direct/Cooperative DF Relay Switching

    木村和裕, 中田雅之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 111 (451(RCS2011 316-375)) 2012

    ISSN: 0913-5685

  248. Iterative Time-Domain Overlap QRM-ML Block Signal Detection for Single-Carrier Transmission without CP Insertion

    諸我英之, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (451(RCS2011 316-375)) 2012

    ISSN: 0913-5685

  249. Subcarrier Allocation Based on Nash Bargaining Solution in Uplink SC-FDMA Distributed Antenna Network

    佐藤勇輔, 松川隆介, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 111 (451(RCS2011 316-375)) 2012

    ISSN: 0913-5685

  250. Application of 2-step QRM-MLD for MIMO-OFDM

    天間克宏, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (451(RCS2011 316-375)) 2012

    ISSN: 0913-5685

  251. Throughput Performance of Joint Frequency-domain Equalization & Spectrum Combining for Transmit Filtered Single-carrier Transmission without CP insertion

    小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 111 (451(RCS2011 316-375)) 2012

    ISSN: 0913-5685

  252. Single-Carrier MIMO Multiplexing Using 2-step QRM-ML Block Signal Detection

    高須満彦, 天間克宏, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (451(RCS2011 316-375)) 2012

    ISSN: 0913-5685

  253. A Study of Scheduling for Uplink SC-FDMA Cooperative AF relay

    岩田隆芳, 木村和裕, 宮崎寛之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 112 (132(RCS2012 75-95)) 2012

    ISSN: 0913-5685

  254. Study on Single-carrier MIMO Spatial Multiplexing/Diversity Switching Method in a Multi-cell Environment

    長岡諒, 熊谷慎也, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 112 (89(RCS2012 43-74)) 2012

    ISSN: 0913-5685

  255. Dynamic Channel Assignment based on Channel Segregation for a Wireless LAN System

    松村祐輝, 熊谷慎也, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 112 (89(RCS2012 43-74)) 2012

    ISSN: 0913-5685

  256. Bit Error Rate Analysis of STBC-OFDM Using Transmit FDE

    長岡諒, 熊谷慎也, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 112 (192(RCS2012 96-124)) 2012

    ISSN: 0913-5685

  257. Retransmission Protocol for Single-Carrier HARQ Bi-Directional Relay Communications Using Analog Network Coding

    宮崎寛之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 112 (192(RCS2012 96-124)) 2012

    ISSN: 0913-5685

  258. Cooperative Diversity with STBC-OFDM

    熊谷慎也, 長岡諒, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 112 (192(RCS2012 96-124)) 2012

    ISSN: 0913-5685

  259. 人間中心の観点での東日本大震災からの創造的復興 8.東日本大震災からの創造的復興に向けて

    小粥幹夫, 安達文幸

    電子情報通信学会誌 95 (10) 2012

    ISSN: 0913-5693

  260. B-5-3 Throughput Performance Comparison of SC Bi-Directional Relay Communications Using MIMO-ANC and MR-ANC

    MIYAZAKI Hiroyuki, OBARA Tatsunori, ADACHI Fumiyuki

    Proceedings of the Society Conference of IEICE 2012 (1) 367 2012

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  261. B-5-24 STBC Coordinative Diversity on Single Frequency Network

    Kumagai Shinya, Nagaoka Ryo, Obara Tatsunori, Yamamoto Tetsuya, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 2012 (1) 388 2012

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  262. RLS-based Channel Estimation for Training Sequence Inserted Single-carrier Block Transmission

    山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 112 (239(RCS2012 125-160)) 2012

    ISSN: 0913-5685

  263. Effect of STBC Cooperative Diversity in A Disaster-Resilient Wireless Network

    熊谷慎也, 長岡諒, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 112 (286(RCS2012 161-183)) 2012

    ISSN: 0913-5685

  264. Channel Estimation for MIMO Analog Network Coded Single-Carrier Bi-Directional Relay Communications

    宮崎寛之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 112 (351(RCS2012 184-237)) 2012

    ISSN: 0913-5685

  265. A Study of Transmit Power Control for Wireless LAN using Channel Segregation Based Dynamic Channel Assignment

    松村祐輝, 天間克宏, 小原辰徳, 山本哲矢, 石原浩一, ABEYSEKERA B. A. Hirantha S, 熊谷智明, 安達文幸

    電子情報通信学会技術研究報告 112 (239(RCS2012 125-160)) 2012

    ISSN: 0913-5685

  266. A Study of Multi-Channel Access for Wireless LAN Using Channel Segregation Based Dynamic Channel Assignment

    天間克宏, 松村祐輝, 小原辰徳, 山本哲矢, 石原浩一, ABEYSEKERA B.A. Hirantha S., 熊谷智明, 安達文幸

    電子情報通信学会技術研究報告 112 (286(RCS2012 161-183)) 2012

    ISSN: 0913-5685

  267. Multi-user Downlink Transmit Beamforming for the Broadband Single-Carrier Distributed Antenna Network: 無線通信システム

    111 (289) 1-5 2011/11

    ISSN: 0913-5685

  268. Improving power efficiency in clustered wireless sensor networks

    111 (202) 41-44 2011/09

    ISSN: 0913-5685

  269. B-8-28 Single Carrier Frequency Domain Adaptive Antenna Array for Distributed Antenna Network

    Peng Wei, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2011 (2) 277 2011/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  270. Data collection with power and buffer consideration in monitoring sensor networks

    110 (378) 149-152 2011/01

    ISSN: 0913-5685

  271. AK-2-5 Mobile Communications Supported by Information Theory

    Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2011 "SS-21"-"SS-24" 2011

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  272. TK-7-2 Center of Education and Research for Information Electronics Systems

    Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2011 (1) "SSS-32"-"SSS-33" 2011

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  273. Spectrum Division & Adaptive Subcarrier Allocation For Direct/Cooperative Relay Switched SC-FDMA Uplink Communications

    中田雅之, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  274. A Study on Channel Capacity of Distributed Antenna Network Using Transmit/Receive Diversity in a Multi-cell Environment

    熊谷慎也, 松川隆介, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  275. Joint MS&Rs/BS hybrid ARQ using frequency-domain equalization for uplink single-carrier cooperative relay transmission

    武田一樹, 安達宏一, SUN Sumei, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  276. A Study of Complexity Reduction of Iterative Signal Detection for Uplink SC-FDMA MIMO using HARQ

    奥山卓, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  277. Study of Pre-detection based Complexity Reduction Methods for Single-Carrier Transmission using 2-step QRM-ML Block Signal Detection

    天間克宏, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  278. Comparison between Time and Frequency-Domain QRM-ML Block Signal Detection for Single-Carrier Transmission

    諸我英之, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  279. Transmit Power Reduction of Distributed Antenna Network for Downlink Transmissions Using Joint Transmit/Receive Diversity

    松川隆介, 小原辰徳, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  280. Modulation Assignment for Uplink Single Carrier Cooperative DF Relay

    木村和裕, 中田雅之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  281. Performance Comparison of Overlap FDE and Inter-block Interference Cancellation for Single-carrier Transmission

    小原辰徳, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  282. Power Allocation for Up/Downlink Transmissions Using Single-carrirer Analog Nctwork Coding

    宮崎寛之, 中田雅之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  283. Packet Combining Scheme for Single-carrier HARQ Using QRM-ML Block Signal Detection

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (433(RCS2010 248-315)) 2011

    ISSN: 0913-5685

  284. B-5-8 Effect of Channel Estimation Error on Time-Domain QRM-ML Block Signal Detection And Frequency-Domain QRM-ML Block Signal Detection

    MOROGA Hideyuki, YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2011 (1) 394 2011

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  285. B-5-38 A Study on 2-step QRM-ML Block Signal Detection for Training Sequence-Aided Single-Carrier Transmission

    Temma Katsuhiro, Yamamoto Tetsuya, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2011 (1) 424 2011

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  286. B-5-36 A Study on MMSE Weight for Overlap FDE in Single-carrier Transmission

    OBARA Tatsunori, TAKEDA Kazuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2011 (1) 422 2011

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  287. B-5-39 Throughput Performance of SC-MIMO HARQ with Training-sequence Aided QRM-MLBD

    YAMAMOTO Tetsuya, TAKEDA Kazuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2011 (1) 425 2011

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  288. A Study of Adaptive Bit Loading for Single-carrier Transmission Using Reduced Complexity Maximum-Likelihood Block Detection

    山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (180(RCS2011 111-139)) 2011

    ISSN: 0913-5685

  289. A Study of Dynamic Channel Assignment for a Distributed Antenna Network

    松川隆介, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 111 (180(RCS2011 111-139)) 2011

    ISSN: 0913-5685

  290. Power Allocation For Direct/Cooperative Relay Switching With SC-FDMA Using Spectrum Division/Adaptive Subcarrier Allocation

    中田雅之, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (260(RCS2011 140-188)) 2011

    ISSN: 0913-5685

  291. Time-Domain Overlap QRM-ML Block Signal Detection for Single-Carrier Transmission without Guard Interval

    諸我英之, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (260(RCS2011 140-188)) 2011

    ISSN: 0913-5685

  292. Study on Channel Estimation for Single-carrier Frequency-domain Equalization using Frequency-domain Transmit Filtering

    小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 111 (289(RCS2011 189-231)) 2011

    ISSN: 0913-5685

  293. Mobile Communications Supported by Information Theory

    安達文幸

    電子情報通信学会技術研究報告 111 (329(IT2011 35-38)) 2011

    ISSN: 0913-5685

  294. Transmit/Receive Antenna Diversity Using Single-carrier Joint-Transmit/Receive MMSE-FDE

    松川隆介, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (345(RCS2011 232-266)) 2011

    ISSN: 0913-5685

  295. Suboptimal Modulation Assignment For Uplink Single Carrier Cooperative DF Relay

    木村和裕, 中田雅之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 111 (344(NS2011 119-144)) 2011

    ISSN: 0913-5685

  296. これからの無線ネットワークのあるべき姿とは~3.11震災の教訓

    安達文幸

    日本無線技報 (61) 2011

    ISSN: 0287-1564

  297. Channel Capacity Improvement of MIMO Spatial Multiplexing on Distributed Antenna Network

    熊谷慎也, 松川隆介, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (260(RCS2011 140-188)) 2011

    ISSN: 0913-5685

  298. Spectrum Efficiency of MIMO Spatial Multiplexing in a Multi-cell Distributed Antenna Network

    熊谷慎也, 松川隆介, 小原辰徳, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 111 (345(RCS2011 232-266)) 2011

    ISSN: 0913-5685

  299. Transmit Diversity and Frequency-Domain Equalization for Bi-Directional Transmissions Using Single-Carrier MIMO Analog Network Coding

    宮崎寛之, 中田雅之, 小原辰徳, 安達文幸

    電子情報通信学会技術研究報告 111 (289(RCS2011 189-231)) 2011

    ISSN: 0913-5685

  300. B-5-85 Investigation of Hybrid Single-Carrier and Multi-Carrier System : Evaluation of Uplink Throughput

    Miyake Yuji, Kashiwamura Ikuro, Tanifuji Shouichi, Oguma Hiroshi, Izuka Noboru, Kameda Suguru, Suematsu Noriharu, Takagi Tadashi, Tsubouchi Kazuo, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 2010 (1) 439 2010/08/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  301. Joint iterative transmit/receive frequency-domain equalization & ISI cancellation for broadband single-carrier block transmissions

    Kazuki Takeda, Fumiyuki Adachi

    Proceedings of the 6th International Wireless Communications and Mobile Computing Conference 163-167 2010/06/28

    Publisher: ACM

    DOI: 10.1145/1815396.1815435  

    More details Close

    In this paper, we propose a new joint transmit/receive equalization technique for single-carrier (SC) block transmissions in a severe frequency-selective fading channel. An iterative frequency-domain inter-symbol interference cancellation (FDIC) is introduced to the joint transmit/receive (Tx/Rx) frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion which was previously proposed by authors. At a receiver, a 1-tap FDE and FDIC are jointly used and they are updated in an iterative manner to achieve larger frequency diversity gain. Since the transmit FDE weight cannot be updated, we introduce a virtual receiver having a receive FDE & FDIC into the transmitter. In the virtual receiver at the transmitter, the same degree of the residual ISI cancellation is assumed to compute the transmit FDE weight, based on the MMSE criterion, matched to the receive FDE & FDIC. The computer simulation results show that the bit error rate (BER) performance is significantly improved by using our proposed scheme.

  302. BP-1-1 Spread Single-carrier Block Multi-access

    Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2010 (1) "SS-11"-"SS-12" 2010/03/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

  303. B-8-38 Dantzig Selector Algorithm for Sparse Multipath Channel Estimation

    Gui Guan, Wan Qun, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2010 (2) 301 2010/03/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

  304. B-8-36 Impact of Channel Estimation Error for Frequency Domain Adaptive Antenna Array

    Peng Wei, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2010 (2) 299 2010/03/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

  305. B-5-46 Uplink capacity of single-carrier multi-user MIMO using QRM-MLD in a frequency-selective channel

    Itagaki Masashi, Takeda Kazuki, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 478 478 2010

    Publisher: The Institute of Electronics, Information and Communication Engineers

  306. Throughput Performance of HARQ Packet Transmission Using Joint Transmit/Receive MMSE-FDE

    武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (368(SIP2009 73-122)) 2010

    ISSN: 0913-5685

  307. QRM-MLD Frequency-domain Block Signal Detection for Single-carrier Transmission Using Frequency-domain Filtering

    山本哲矢, 奥山卓, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (368(SIP2009 73-122)) 2010

    ISSN: 0913-5685

  308. Frequency-domain Iterative Successive MUI cancellation for SC-FDMA using frequency-domain filtering

    奥山卓, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (368(SIP2009 73-122)) 2010

    ISSN: 0913-5685

  309. Impact of Time-multiplexed Pilot-assisted Channel Estimation on SC-FDE in The Presence of Timing Offset

    小原辰徳, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (368(SIP2009 73-122)) 2010

    ISSN: 0913-5685

  310. 拡散シングルキャリア・ブロックマルチアクセス

    安達文幸

    電子情報通信学会大会講演論文集 2010 2010

    ISSN: 1349-1369

  311. QRM-MLDを用いる広帯域シングルキャリア・マルチユーザMIMOの上りリンク容量

    板垣将志, 武田一樹, 安達文幸

    電子情報通信学会大会講演論文集 2010 2010

    ISSN: 1349-1369

  312. B-5-118 Bit Error Rate Distribution of Downlink Distributed Antenna Network Using Space-Time Block Coded-Joint Transmit/Receive Diversity

    MATSUKAWA Ryusuke, MATSUDA Hiroki, TAKEDA Kazuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2010 (1) 550 2010

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  313. B-5-117 Channel Capacity of Distributed Antenna Network Using Space-Time Block Coded-Joint Transmit/Receive Diversity

    MATSUDA Hiroki, TAKEDA Kazuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2010 (1) 549 2010

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  314. B-5-98 Performance Comparison of Multi-code DS- and MC-CDMA with QRM-MLD Frequency-domain Block Signal Detection

    YAMAMOTO Tetsuya, TAKEDA Kazuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2010 (1) 530 2010

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  315. B-5-94 SC-FDE with frequency-domain filtering

    Okuyama Suguru, Takeda Kazuki, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2010 (1) 526 2010

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  316. B-5-95 Bit Error Rate Analysis of Single-carrier Transmission Using Overlap FDE

    OBARA Tatsunori, TAKEDA Kazuki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2010 (1) 527 2010

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  317. B-5-99 The effect of channel estimation on the performance of single-carrier transmission using joint transmit/receive MMSE-FDE

    Takeda kazuki, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2010 (1) 531 2010

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  318. Throughput Performance Comparison between Overlap FDE and Sliding-window Chip Equalizer for DS-CDMA HARQ

    小原辰徳, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  319. Impact of lattice reduction on the cellular uplink using multi-user MIMO

    板垣将志, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  320. Frequency-domain Iterative Successive MUI cancellation and Antenna Diversity for SC-FDMA using frequency-domain filtering

    奥山卓, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  321. Single-carrier Transmission Using Joint Transmit/receive MMSE-FDE And Iterative ISI Cancellation

    武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  322. Performance of Single-carrier Transmission with Frequency-domain Block Signal Detection Using Transmit Diversity

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  323. A Study on Space-Time Block Coded-Joint Transmit/Receive Diversity for A Distributed Antenna Network

    松川隆介, 松田大輝, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  324. Channel Capacity of SC-FDMA Distributed Antenna Network Using Transmit Diversity

    松田大輝, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  325. Application of Iterative Signal Processing to MC-CDMA with Frequency Domain Phase Rotation

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  326. Capacity improvement of SC-FDMA Cooperative Relay using subcarrier allocation

    中田雅之, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  327. Wiener Filter based Channel Estimation Using Superimposed Pilot

    内海哲哉, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (440(RCS2009 257-342)) 2010

    ISSN: 0913-5685

  328. HARQ Throughput of Single-carrier Transmission Using Joint Transmit/receive MMSE-FDE And Iterative ISI Cancellation

    武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (77(RCS2010 18-47)) 2010

    ISSN: 0913-5685

  329. Iterative MMSE Spatial Filtering for uplink SC-FDMA

    奥山卓, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (77(RCS2010 18-47)) 2010

    ISSN: 0913-5685

  330. Single-Carrier Frequency-Domain Block Signal Detection using 2-Step QRM-MLD

    天間克宏, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 110 (77(RCS2010 18-47)) 2010

    ISSN: 0913-5685

  331. Measurement and Evaluation of Indoor Propagation Environment for 60GHz-Band Broadband Wireless Communication

    三宅裕士, HAO NGOC Tran, 亀田卓, 末松憲治, 高木直, 坪内和夫, 安達文幸

    電子情報通信学会技術研究報告 110 (153(SR2010 16-39)) 2010

    ISSN: 0913-5685

  332. B-5-8 A Study on the Uplink Transmission Performance of Single Carrier Distributed Antenna Network Using Space-Time Transmit Diversity

    MATSUKAWA Ryusuke, OBARA Tatsunori, TAKEDA Kazuki, ADACHI Fumiyuki

    Proceedings of the Society Conference of IEICE 2010 (1) 362 2010

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  333. HARQ Throughput of Distributed Antenna Network Downlink Using Space-Time Block Coded-Joint Transmit/Receive Diversity

    松川隆介, 小原辰徳, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (251(RCS2010 107-141)) 2010

    ISSN: 0913-5685

  334. Training Sequence-aided QRM-ML Block Signal Detection for Single-carrier MIMO Multiplexing

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (251(RCS2010 107-141)) 2010

    ISSN: 0913-5685

  335. Single-carrier HARQ Throughput performance with Iterative Channel Estimation Using Pilot And Wiener-filtering

    内海哲哉, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (251(RCS2010 107-141)) 2010

    ISSN: 0913-5685

  336. Iterative MMSE Detection and Interference Cancellation for Uplink SC-FDMA MIMO using HARQ

    奥山卓, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (251(RCS2010 107-141)) 2010

    ISSN: 0913-5685

  337. Uplink Capacity of Single-Carrier Multi-user MIMO Using Iterative Frequency Domain Interference Cancellation in A Cellular System

    板垣将志, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (268(RCS2010 142-158)) 2010

    ISSN: 0913-5685

  338. Study of 2-step QRM-ML Block Signal Detection using Adaptive Tree Structure Simplification for Single-Carrier Transmission

    天間克宏, 山本哲矢, 安達文幸

    電子情報通信学会技術研究報告 110 (340(RCS2010 159-198)) 2010

    ISSN: 0913-5685

  339. Direct/Cooperative Relay Switching for SC-FDMA using Spectrum division & Adaptive subcarrier allocation

    中田雅之, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 110 (340(RCS2010 159-198)) 2010

    ISSN: 0913-5685

  340. Multi-hop virtual cellular network for high speed wireless network

    KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 109 (246) 1-6 2009/10/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    In order to realize high speed data transmissions in mobile communication networks, there exists a transmit power problem. To reduce the transmit power, while increasing the transmission data rate, authors proposed a wireless multi-hop virtual cellular network (VCN). The authors have been studied on routing and channel allocation schemes in multi-hop VCN. And the relationship among throughput, channel capacity, and transmission power in multi-hop VCN is also evaluated. In this paper, we introduce the multi-hop VCN for high speed wireless network.

  341. Modeling and analysis for proactive-decision spectrum handoff in cognitive radio networks: 無線通信システム

    109 (164) 13-18 2009/08

    ISSN: 0913-5685

  342. Frequency domain adaptive antenna array for uplink transmission: 無線通信システム

    109 (164) 91-95 2009/08

    ISSN: 0913-5685

  343. BI-2-3 Multiple-access Techniques For Mobile Communications

    Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2009 (1) "SS-111"-"SS-112" 2009/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  344. B-5-85 A Study on Channel Capacity and Frequency Reuse Distance for Multi-hop Virtual Cellular Network Using One Dimensional Arrangement Model

    KUDOH Eisuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2009 (1) 518-518 2009/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  345. Hybrid frequency reuse for cellular MIMO systems with multi-user diversity: 無線通信システム

    108 (445) 89-93 2009/03

    ISSN: 0913-5685

  346. Study on throughput and channel capacity of multi-hop virtual cellular network

    KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 108 (445) 307-312 2009/02/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    In order to realize high speed data transmissions in mobile communication networks, there exists a transmit power problem. To reduce the transmit power while increasing the transmission data rate, authors proposed a wireless multi-hop virtual cellular network (VCN). As the number of hops increases, the bandwidth available for each link is made narrower and the achievable throughput or capacity reduces since each link needs to be allocated a different frequency block. On the other hand, the signal-to-noise plus interference power ratio of each link increases since the communication range of each link is shortened, and thus the achievable throughput or capacity does not necessarily reduces. In this paper, to discuss this problem, relationship among throughput, channel capacity, and transmission power in multi-hop VCN is evaluated and compared to the conventional single hop CN.

  347. Effect of Transmit Power Control on Frequency Efficiency of Distributed Antenna Network using Maximal Ratio Diversity Transmission

    松田大輝, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 108 (390(SIP2008 124-163)) 2009

    ISSN: 0913-5685

  348. Single Carrier Transmissions with Joint Antenna Receive Diversity and QRM-MLD

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 108 (445(RCS2008 212-287)) 2009

    ISSN: 0913-5685

  349. A Study Of Impact Of Timing Offset On Single-carrier Transmission With Frequency-domain Equalization

    小原辰徳, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 108 (445(RCS2008 212-287)) 2009

    ISSN: 0913-5685

  350. A Study on MMSE Weight of Frequency-Domain Signal Detection for Multi-Code DS-CDMA

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 108 (445(RCS2008 212-287)) 2009

    ISSN: 0913-5685

  351. Theoretical Study On Joint THP/pre-FDE Of Broadband Single-carrier Signal Transmissions In A Frequency-selective Channel

    武田一樹, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 108 (445(RCS2008 212-287)) 2009

    ISSN: 0913-5685

  352. 移動通信におけるマルチアクセス技術

    安達文幸

    電子情報通信学会大会講演論文集 2009 2009

    ISSN: 1349-1369

  353. BS-3-14 On Computation of Mean Squared Equalization Error for Single-carrier Iterative Frequency-domain Equalization & Residual Interference Cancellation

    Adachi Fumiyuki, Takeda Kazuki, Kojima Yohei

    Proceedings of the IEICE General Conference 2009 (1) "S-68"-"S-69" 2009

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  354. A Study of Frequency-Domain Signal Detection for Multi-Code DS-CDMA Transmission

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (38(RCS2009 1-26)) 2009

    ISSN: 0913-5685

  355. Impact of Channel Delay Time on Single-carrier Transmission using Oversampling Frequency-domain Equalization

    小原辰徳, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (38(RCS2009 1-26)) 2009

    ISSN: 0913-5685

  356. Joint Transmit/Receive MMSE-FDE for Multicode DS-CDMA

    武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (38(RCS2009 1-26)) 2009

    ISSN: 0913-5685

  357. A study of multi-user MIMO using lattice reduction

    板垣将志, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (105(RCS2009 27-52)) 2009

    ISSN: 0913-5685

  358. B-5-14 A Study on Space-Time Block Coded-Joint Transmit/Receive Diversity

    TOMEBA Hiromichi, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2009 (1) 447 2009

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  359. A Study of Frequency-domain Filtering for SC-FDE

    奥山卓, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (105(RCS2009 27-52)) 2009

    ISSN: 0913-5685

  360. A study of PAPR reduction scheme for OFDM signal transmission

    武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (130(RCS2009 53-77)) 2009

    ISSN: 0913-5685

  361. Application of Frequency-domain Block Signal Detection Using Iterative V-BLAST Detection and Walsh-Hadamard Precoding to Turbo-coded Single-carrier Transmission

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (164(RCS2009 78-109)) 2009

    ISSN: 0913-5685

  362. BER Performance Comparison between Sliding Window Chip Equalizer and Overlap FDE on DS-CDMA

    小原辰徳, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (164(RCS2009 78-109)) 2009

    ISSN: 0913-5685

  363. Average BER Performance of Multicarrier CDMA Mobile Radio Using Joint Transmit/Receive MMSE-FDE

    武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (164(RCS2009 78-109)) 2009

    ISSN: 0913-5685

  364. Downlink Transmit Weight That Maximize The Channel Capacity for Single-carrier Distributed Antenna Network

    松田大輝, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (229(RCS2009 110-132)) 2009

    ISSN: 0913-5685

  365. Single-carrier Frequency-domain Equalization to Achieve Frequency Diversity Gain while Suppressing the Negative Effect of Timing Offset

    小原辰徳, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (305(RCS2009 133-166)) 2009

    ISSN: 0913-5685

  366. Single-carrier Frequency-domain Block Signal Detection Using Training Sequence and QRM-MLD

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (305(RCS2009 133-166)) 2009

    ISSN: 0913-5685

  367. A study on the capacity of downlink distributed antenna network in a frequency-selective channel

    武田一樹, 松田大輝, 安達文幸

    電子情報通信学会技術研究報告 109 (341(RCS2009 167-206)) 2009

    ISSN: 0913-5685

  368. MMSE based QRM-MLD Frequency-domain Block Signal Detection for Single-carrier Transmission

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (341(RCS2009 167-206)) 2009

    ISSN: 0913-5685

  369. Frequency-domain parallel MUI cancellation for SC-FDMA using frequency-domain filtering

    奥山卓, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 109 (341(RCS2009 167-206)) 2009

    ISSN: 0913-5685

  370. Multicode MC-CDMA Virtual MIMO System and Iterative ICI Cancellation

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 108 (390(SIP2008 124-163)) 2009

    ISSN: 0913-5685

  371. Channel Capacity in 2-hop OFDMA Virtual Cellular Network using Parallel Relay Route

    ISHIDA Hitoshi, KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 108 (358) 91-96 2008/12/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    In the next generation mobile communication systems, high speed data services are expected. However, unacceptable large transmit power may be required. Multi-hop technique can reduce the total transmit power for relay transmission compared with single hop transmission. In this paper, we propose the parallel relay transmission using orthogonal frequency division multiple access (OFDMA), in which the multiple parallel routes (one subcarrier is allocated to each link) are constructed between mobile terminal and base station in order to reduce the transmit power and improve the transmission performance. Full search allocation, where all combinations of subcarriers and routes are examined and the best combination which gives the maximum channel capacity is searched, requires a prohibitively large number of searching. Therefore, we study a successive allocation to reduce the number of searching. We evaluate the channel capacity of proposed parallel relay transmission and compare it, cooperative diversity and conventional single hop network.

  372. Throughput analysis of ARQ in multi-route parallel transmission in OFDMA 2-hop Virtual Cellular Network

    JOSHI Bijeta, KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 108 (358) 97-102 2008/12/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    A 2-hop Virtual Cellular Network (VCN) is a promising network architecture for extending the coverage of a base station without increasing the transmit power in high speed data transmissions. In this paper an efficient routing with subcarrier allocation for multi-route parallel packet transmission in OFDMA 2-hop VCN, in order to increase the expected throughput, has been studied. Moreover, throughput performance of uneven packet transmission protocol in which more packets are sent through routes with better channel conditions is evaluated by computer simulation. It is shown that better throughput performance can be achieved in the multi-route parallel packet transmission than in the conventional single-route parallel packet transmission and that uneven packet transmission protocol further improves throughput performance at higher transmission rates.

  373. B-5-6 Optimal Relay Location Using Inter-relay Data Exchange in Cooperative Relaying Network

    Fares Salma Ait, Adachi Fumiyuki, Kudoh Eisuke

    Proceedings of the Society Conference of IEICE 2008 (1) 319-319 2008/09/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

  374. B-5-104 Adaptive 2D Code Assignment for Uplink in 2-Dimensional Block Spread CDMA system

    Yu Qiyue, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2008 (1) 490 2008/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  375. B-5-90 A Study on ARQ for a 2-hop Virtual Cellular Network

    KUDOH Eisuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2008 (1) 476-476 2008/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  376. B-5-91 Cannel Capacity Comparison of 2-hop Virtual Cellular Networks Using OFDMA and DS-CDMA

    ISHIDA Hitoshi, KUDOH Eisuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2008 (1) 477-477 2008/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  377. Study on Adaptive Sub-carrier Arrangement of OFDMA Cellular Network

    KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 107 (518) 353-357 2008/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    In OFDMA cellular network, if all the sub-carriers are used in all cells, the transmission performance of the user around the cell edge may be degraded due to the interference from the adjacent cells. If all the sub-carriers are divided into several sub-carrier groups, the sub-carrier group is allocated adaptively in each cell and the allocated sub-carriers are arranged to each user using a scheduling algorithm, the degradation of the transmission performance of the user around the cell edge may be improved since it can avoid the large interference from the adjacent cells. In this paper, OFDMA cellular network that has the above-mentioned feature is introduced, and the channel capacity is evaluated by the computer simulation.

  378. Adaptive code assignment algorithm for a multi-user/multi-rate CDMA system: 無線通信システム

    107 (518) 37-42 2008/03

    ISSN: 0913-5685

  379. Impact of adaptive antenna array and transmit power control on uplink performance of a DS-CDMA packet cellular system: 無線通信システム

    107 (518) 55-60 2008/03

    ISSN: 0913-5685

  380. Space-Time Block Coded-Joint Transmit/Receive Diversity using more than 5 Receive Antennas

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (518(RCS2007 186-246)) 2008

    ISSN: 0913-5685

  381. BS-1-4 Study on MIMO Channel Capacity in A Frequency-selective Channel

    Adachi Fumiyuki, Adachi Koichi, Kojima Yohei, Takeda Kazuki

    Proceedings of the IEICE General Conference 7 "S-7"-"S-8" 2008

    Publisher: The Institute of Electronics, Information and Communication Engineers

  382. BS-1-5 Channel Capacity of MC-CDMA MIMO Taking into Account Residual ICI/IAI

    Adachi Koichi, Adachi Fumiyuki, Nakagawa Masao

    Proceedings of the IEICE General Conference 2008 (1) "S-9"-"S-10" 2008

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  383. Uplink capacity of a single-carrier multi-user MIMO multiplexing in a frequency-selective channel

    千葉宇弘, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (518(RCS2007 186-246)) 2008

    ISSN: 0913-5685

  384. Throughput Performance of DS-CDMA HARQ With Overlap FDE Using Pilot-assisted Channel Estimation

    武田一樹, 留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (518(RCS2007 186-246)) 2008

    ISSN: 0913-5685

  385. A Theoretical Study on Channel Capacity of MC-CDMA and OFDM

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 107 (440(RCS2007 134-160)) 2008

    ISSN: 0913-5685

  386. B-5-70 A Study on Frequency-Space Block Coded Diversity for Multicarrier transmission

    TOMEBA Hiromichi, TAKEDA Kazuaki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2008 (1) 456 2008

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  387. 周波数選択性チャネルにおけるMIMOチャネル容量の考察

    安達文幸, 安達宏一, 小島洋平, 武田一樹

    電子情報通信学会大会講演論文集 2008 2008

    ISSN: 1349-1369

  388. A Study of Frequency-domain Joint Equalization/Despreading for Multi-code DS-CDMA Using Cyclic Delay Transmit Diversity And Receive Antenna Diversity

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 108 (61(RCS2008 1-15)) 2008

    ISSN: 0913-5685

  389. BP-2-2 Wireless Access for Long-Term Evolution of 3G Mobile Communication System

    Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2008 "SS-13"-"SS-14" 2008

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  390. Average BER Performance of Space-Time Block Coded-Joint Transmit/Receive Diversity in MC-CDMA signal transmission

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (441(RCS2007 161-185)) 2008

    ISSN: 0913-5685

  391. HARQ throughput performance of DS-CDMA/ICI cancellation using transmit antenna diversity

    武田和晃, 小島洋平, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 107 (518(RCS2007 186-246)) 2008

    ISSN: 0913-5685

  392. Effect of spreading factor for turbo-coded MC-CDMA with ICI cancellation

    油井辰憲, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 107 (518(RCS2007 186-246)) 2008

    ISSN: 0913-5685

  393. BS-1-1 Transmit/receive Antenna Diversity for SC-CDMA with Frequency-domain Equalization

    Takeda Kazuaki, Tomeba Hiromichi, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2008 (1) "S-1"-"S-2" 2008

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  394. B-5-43 A Study on Channel Capasity in A Cellular System

    Adachi Koichi, Adachi Fumiyuki, Nakagawa Masao

    Proceedings of the IEICE General Conference 2008 (1) 429 2008

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  395. Performance of Multicode DS-CDMA MIMO multiplexing with Iterative FDI2C and 2D MMSE-FDE using CDP-CE

    藤森崇文, 武田一樹, 中島昭範, 安達文幸

    電子情報通信学会技術研究報告 107 (440(RCS2007 134-160)) 2008

    ISSN: 0913-5685

  396. Impact of Timing Offset on DS-CDMA with Overlap FDE

    小原辰徳, 留場宏道, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 108 (61(RCS2008 1-15)) 2008

    ISSN: 0913-5685

  397. BER Performance of DS-CDMA Frequency-domain Turbo Equalization with 2-Step Maximum Likelihood Channel Estimation

    小島洋平, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (518(RCS2007 186-246)) 2008

    ISSN: 0913-5685

  398. B-5-60 BER Performance of Delay-time/Code Division Multi-Access Using Frequency-domain Spreading

    TAKEDA Kazuki, YAMAMOTO Tetsuya, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2008 (1) 446 2008

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  399. A Study on Channel Capacity of Distributed Antenna System Using Maximal Ratio Transmission

    松田大輝, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 107 (518(RCS2007 186-246)) 2008

    ISSN: 0913-5685

  400. RLS-based Channel Estimation for DS-CDMA Frequency-domain Equalization

    小島洋平, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (440(RCS2007 134-160)) 2008

    ISSN: 0913-5685

  401. Throughput of DS-CDMA Wireless Packet Access with Frequency-domain Equalization and Random TPC

    伊藤陽紀, 工藤栄亮, WANG ZhiSen, 安達文幸

    電子情報通信学会技術研究報告 107 (518(RCS2007 186-246)) 2008

    ISSN: 0913-5685

  402. Average BER performance of transmit antenna diversity for MC-CDMA with ICI cancellation

    武田和晃, 小島洋平, 留場宏道, WANG Jiangzhou, 安達文幸

    電子情報通信学会技術研究報告 107 (440(RCS2007 134-160)) 2008

    ISSN: 0913-5685

  403. B-5-27 BER Performance of Multicode DS-CDMA Frequency-domain ICI Cancellation with 2-Step Maximum Likelihood Channel Estimation

    Kojima Yohei, Takeda Kazuaki, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2008 (1) 413 2008

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  404. ABP-2-5 Technical Issues of Broadband Wireless Access for IMT-Advanced Systems

    Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 2008 "SS-28"-"SS-29" 2008

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  405. Application of LLL-algorithm for joint THP/pre-FDE

    武田一樹, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 107 (440(RCS2007 134-160)) 2008

    ISSN: 0913-5685

  406. A Study of Frequency-Domain Equalization for DS-CDMA Cyclic Delay Transmit Diversity

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 107 (518(RCS2007 186-246)) 2008

    ISSN: 0913-5685

  407. An Analysis of Cellular Channel Capacity Under Worst Case Condition

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 108 (188(RCS2008 53-102)) 2008

    ISSN: 0913-5685

  408. A Study on Frequency Efficiencies of Distributed Antenna Network in Cellular System

    松田大輝, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 108 (305(RCS2008 130-150)) 2008

    ISSN: 0913-5685

  409. A Study of Frequency-Domain Signal Detection for Single-Carrier Transmission

    山本哲矢, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 108 (305(RCS2008 130-150)) 2008

    ISSN: 0913-5685

  410. Space Division Multiplexing for MC-CDMA Based on Phase Rotation

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 108 (249(RCS2008 103-129)) 2008

    ISSN: 0913-5685

  411. マルチホップ技術とMIMO技術を融合した分散マルチユーザ仮想中継局(VRS)ネットワークにおけるリソース割当法の研究

    工藤栄亮, 安達文幸

    電気通信普及財団研究調査報告書(CD-ROM) (23) 2008

    ISSN: 1346-0404

  412. Optimization of Single-carrier Joint THP/pre-FDE Based On The MMSE Criterion

    武田一樹, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 108 (358(RCS2008 151-171)) 2008

    ISSN: 0913-5685

  413. Throughput Comparison of Single-carrier And Multi-carrier Signal Transmissions Using Overlap FDE

    武田一樹, 小原辰徳, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 108 (358(RCS2008 151-171)) 2008

    ISSN: 0913-5685

  414. Throughput Performance of Multicode DS-CDMA And MC-CDMA MIMO Multiplexing Using CDP-CE And Iterative Frequency-domain Interference Cancellation

    藤森崇文, 武田一樹, 安達文幸

    電子情報通信学会技術研究報告 108 (358(RCS2008 151-171)) 2008

    ISSN: 0913-5685

  415. Channel Capacity of MC-CDMA MIMO with Imperfect ICI/IAI Cancellation

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 108 (117(RCS2008 16-31)) 2008

    ISSN: 0913-5685

  416. Subcarrier Allocation for a 2-Hop OFDMA Virtual Cellular Network

    ISHIDA Hitoshi, KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 107 (402) 43-48 2007/12/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    A multi-hop virtual cellular network (VCN) was proposed for future mobile communication systems. We have studied the multi-hop channel allocation for direct sequence code division multiple access (DS-CDMA) VCN. In DS-CDMA, although the same channel can be reused at different links in a VC by allocating the different spreading codes, a strong interference may be received from the adjacent wireless port. In this paper, we apply orthogonal frequency division multiple access (OFDMA) to VCN. In OFDMA, if the different subcarriers are allocated, interference from adjacent wireless port can be avoided. We study channel configuration methods for the downlink 2-hop OFDMA VCN. We evaluate, by numerical computation method, the Shannon's channel capacity when the block, equidistance and adaptive channel configuration methods are used. We compare 2-hop VCN and 1-hop CN.

  417. New direction of wireless technology

    Fumiyuki Adachi

    PROCEEDINGS OF 2007 INTERNATIONAL WORKSHOP ON SIGNAL DESIGN AND ITS APPLICATIONS IN COMMUNICATIONS 1-1 2007/09/01

    DOI: 10.1109/iwsda.2007.4408334  

  418. Technologies in multihop cellular networks

    Peter H. J. Chong, Fumiyuki Adachi, Seppo Hamalainen, Victor Leung

    IEEE COMMUNICATIONS MAGAZINE 45 (9) 64-65 2007/09

    ISSN: 0163-6804

  419. BS-10-12 2-dimensional Block Spread DS-CDMA Using MAI Cancellation

    LIU Le, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2007 (2) "S-115"-"S-116" 2007/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  420. B-1-222 Performance of Receiver Using Frequency-domain Equalization Technique for Single Carrier and Adaptive Array Antenna

    Saito Kazuki, Yuan Qiaowei, Chen Qiang, Sawaya Kunio, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2007 (1) 222-222 2007/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  421. Pilot-assisted channel estimation for turbo-coded MC-CDMA with ICI cancellation

    YUI Tatsunori, FUKUDA Kaoru, NAKAJIMA Akinori, ADACHI Fumiyuki

    IEICE technical report 106 (555) 53-56 2007/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Multicarrier code division multiple access (MC-CDMA) has been attracting much attention as a transmission technique in the next generation mobile communications. Turbo-coded MC-CDMA can significantly improve the bit error rate (BER) performance in a severe frequency-selective fading channel. However, the BER performance of turbo-coded MC-CDMA degrades due to the residual inter-code interference (ICI). Recently, frequency-domain adaptive interference cancellation (FDAIC) was proposed to reduce the residual ICI and the achievable BER performance was evaluated assuming ideal channel estimation. So far, the BER performance with a practical channel estimation hasn't been examined. In this paper, assuming pilot-assisted channel estimation, we evaluate by computer simulation the BER performance of turbo-coded MC-CDMA with FDAIC.

  422. Blocking probability of a 2 hop Virtual Cellular Network

    ISHIDA Hitoshi, EL ALAMI Lalla Soundous, KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 106 (555) 127-130 2007/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In future mobile communication systems, there will be a big need to increase the transmit power. However, as the transmit power is limited, keeping the same transmit power will lead to decrease in the coverage area of the present cellular system. In order to overcome this problem, a multi-hop virtual cellular network (VCN) was proposed. In VCN, the coverage area can be extended using multi-hop communication technique, and the blocking probability can be reduced compared to the single hop conventional cellular network. In this paper, we focus on the 2 hop VCN and evaluate its blocking probability using computer simulation. We propose channel assignment using maxSINR algorithm and make comparison with when using channel segregation algorithm.

  423. Outage Probablity of a 2-Hop Virtual Cellular Network

    JOSHI Bijeta, EL ALAMI Lalla Soundous, KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 106 (555) 131-134 2007/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    A wireless multi-hop virtual cellular network (VCN) was recently proposed to avoid the large peak transmit power, resulting from the high speed data transmissions expected in next generation mobile communication systems. In a multi-hop VCN, a central port (CP) which is a gateway to the core network, communicates with a mobile terminal (MT) via wireless ports (WPs) in the downlink. In this paper, 2-hop VCN, which is a special case the of multi-hop VCN where a CP communicates with MT directly or via one WP using 2 hops only, is proposed. The impact of the distribution of WPs on the outage probability is evaluated by numerical analysis and computer simulation.

  424. Throughput performance of a 2 hop virtual cellular network

    KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 106 (555) 123-126 2007/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    There have been strong demands for higher speed data transmissions in mobile communications. To reduce the peak transmit power while increasing the data transmission rates, authors proposed a wireless multi-hop virtual cellular network (VCN). In order to shift from an existing cellular system easily, the number of hops may be limited to 2. The throughput performance may be degraded compared to the conventional single hop cellular network, since the delay time increases in the multi hop communication. ARQ is indispensable in packet transmission. In this paper, the throughput performance of 2-hop VCN with stop-and-wait (SW) or selective repeat (SR) ARQ is theoretically evaluated and compared to the conventional single hop case.

  425. A theoretical study on throughput performance of DS-CDMA packet mobile communication using random transmit power control

    工藤栄亮, 伊藤陽紀, WANG ZhiSen, 安達文幸

    電子情報通信学会技術研究報告 107 (262(RCS2007 80-96)) 2007

    ISSN: 0913-5685

  426. A Study on Channel Capacity of MC-CDMA with ICI Canceller

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 107 (306(RCS2007 97-111)) 2007

    ISSN: 0913-5685

  427. Single-carrier Transmission Frequency-Domain Adaptive Antenna Array based on the Average CCI Power Minimization Criterion

    KANG Byeong-woo, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 106 (555(RCS2006 236-284)) 2007

    ISSN: 0913-5685

  428. BER Performance of Turbo-coded Single-carrier Transmission Using Joint Tomlinson-Harashima Precoding and Frequency-domain Equalization

    武田一樹, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 106 (555(RCS2006 236-284)) 2007

    ISSN: 0913-5685

  429. Iterative Frequency-domain Interference Cancellation of Inter-code Interference and Inter-antenna Interference

    中島昭範, 安達文幸

    電子情報通信学会技術研究報告 106 (555(RCS2006 236-284)) 2007

    ISSN: 0913-5685

  430. 2-Step Maximum Likelihood Channel Estimation for DS-CDMA Frequency-domain Equalization

    小島洋平, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (113(RCS2007 11-28)) 2007

    ISSN: 0913-5685

  431. 1: Researches on New Generation Mobile in NICT

    安達文幸, 小川博世, 三浦龍

    情報通信研究機構季報 52 (4) 2007

    ISSN: 1349-3191

  432. Combined effect of Random Transmit Power Control and Inter-Path Interference Cancellation on DS-CDMA Packet Mobile Communications

    伊藤陽紀, WANG ZhiSen, 工藤栄亮, 安達文幸

    電子情報通信学会技術研究報告 107 (192(RCS2007 53-79)) 2007

    ISSN: 0913-5685

  433. Spectrum Efficiency of MIMO Multiplexing in a Cellular Environment

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 107 (113(RCS2007 11-28)) 2007

    ISSN: 0913-5685

  434. B-5-79 Performance Comparison of Single-Carrier and OFDM Transmissions in a Channel Having Fractionally Spaced Time Delays

    TOMEBA Hiromichi, TAKEDA Kazuaki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2007 (1) 493 2007

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  435. Decision-feedback channel estimation for turbo-coded MC-CDMA with ICI cancellation

    油井辰憲, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 107 (262(RCS2007 80-96)) 2007

    ISSN: 0913-5685

  436. B-5-115 Throughput performance of turbo coded single-carrier transmission HARQ with joint Tomlinson-Harashima precoding and frequency-domain equalization

    Takeda Kazuki, Tomeba Hiromichi, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2007 (1) 529 2007

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  437. A Study on Channel Capacity of MC-CDMA

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 107 (262(RCS2007 80-96)) 2007

    ISSN: 0913-5685

  438. B-5-112 A Study on Pilot Sequence for Channel Estimation of MC DS-CDMA with Frequency-domain Equalization

    Shima Tomoyuki, Tanaka Ken, Tomeba Hiromichi, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2007 (1) 526 2007

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  439. BER Performance Improvement of STTD for MC-CDMA using Overlap FDE

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 106 (477(SIP2006 158-177)) 2007

    ISSN: 0913-5685

  440. Uplink capacity of SC-SSMA using frequency-domain interleaving

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (38(RCS2007 1-10)) 2007

    ISSN: 0913-5685

  441. Joint effect of frequency-domain ICI cancellation and transmit antenna diversity for DS-CDMA/MMSE-FDE

    武田和晃, 小島洋平, 安達文幸

    電子情報通信学会技術研究報告 107 (192(RCS2007 53-79)) 2007

    ISSN: 0913-5685

  442. Channel Estimation Using Cyclic Delay Pilot for MIMO Transmission

    藤森崇文, 尾崎一幸, 中島昭範, 安達文幸

    電子情報通信学会技術研究報告 107 (38(RCS2007 1-10)) 2007

    ISSN: 0913-5685

  443. Joint THP/pre-FDE for Single-Carrier Transmission

    武田一樹, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 107 (192(RCS2007 53-79)) 2007

    ISSN: 0913-5685

  444. Evolution of 3G Mobile Communications Systems into Future Systems

    安達文幸

    電気学会電子回路研究会資料 ECT-07 (80-85.87) 25-31 2007

  445. Downlink capacity of multi-carrier multiple access with variable spreading factor and subcarrier allocation

    三井久士, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (262(RCS2007 80-96)) 2007

    ISSN: 0913-5685

  446. A Delay-Time/Code Division Multi-Access In A Frequency-selective Channel

    安達文幸, 武田一樹

    電子情報通信学会技術研究報告 107 (113(RCS2007 11-28)) 2007

    ISSN: 0913-5685

  447. Pilot-assisted Channel Estimation for Orthogonal Multi-carrier DS-CDMA with Frequency-domain Equalization

    志摩智之, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 107 (262(RCS2007 80-96)) 2007

    ISSN: 0913-5685

  448. Average BER performance of MC-CDMA with Overlap FDE using pilot assisted channel estimation

    留場宏道, 武田一樹, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (192(RCS2007 53-79)) 2007

    ISSN: 0913-5685

  449. B-5-113 Impact of Chammel Estimation for DS-CDMA with Frequency-domain Iterative ICI Cancellation

    Kojima Yohei, Takeda Kazuaki, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2007 (1) 527 2007

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  450. Uplink Capacity of A Cellular System Using Single-carrier Multi-user MIMO

    千葉宇弘, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 107 (402(RCS2007 112-133)) 2007

    ISSN: 0913-5685

  451. Throughput Performance of MC-CDMA using Overlap FDE

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 106 (555(RCS2006 236-284)) 2007

    ISSN: 0913-5685

  452. 超高速を狙う次世代移動無線技術

    安達文幸

    KEC情報 (203) 2007

  453. A Study on Channel Capacity of MC-CDMA MIMO

    安達宏一, 安達文幸, 中川正雄

    電子情報通信学会技術研究報告 107 (402(RCS2007 112-133)) 2007

    ISSN: 0913-5685

  454. B-5-40 BER performance of multicode MC-CDMA using decision-feedback pilot assisted channel estimation

    Yui Tatsunori, Fukuda Kaoru, Nakajima Akinori, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2007 454-454 2007

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  455. Throughput of MC-CDMA HARQ with ICI cancellation and turbo equalization

    FUKUDA Kaoru, NAKAJIMA Akinori, ADACHI Fumiyuki

    IEICE technical report 106 (360) 53-58 2006/11/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    Broadband packet access technique is required for the next generation mobile communications systems. Multi carrier CDMA (MC-CDMA) is a promising multi-access technique. Hybrid ARQ (HARQ), especially HARQ type II, is a promising error control technique. Recently, LDPC coding has gained much attention. The throughput performance of the LDPC-coded multi-code MC-CDMA degrades due to the inter-code interference (ICI) in a severe frequency-selective fading channel and has worse performance than OFDM. The frequency-domain adaptive interference canceller (FDAIC) has been proposed to reduce the ICI. In this paper, we evaluate by computer simulation the throughput performance of LDPC-coded multi-code MC-CDMA HARQ type II using FDAIC in a frequency-selective Rayleigh fading channel. It is shown that LDPC-coded multi-code MC-CDMA HARQ type II using FDAIC can achieve better performance than OFDM.

  456. Throughput of MC-CDMA HARQ with adaptive modulation and ICI cancellation

    FUKUDA Kaoru, NAKAJIMA Akinori, ADACHI Fumiyuki

    IEICE technical report 106 (168) 91-96 2006/07/12

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Broadband packet access techniques will be required for the next generation mobile communications systems. Multi carrier CDMA (MC-CDMA) is a promising multi-access technique. Hybrid ARQ (HARQ) is one of the promising error control techniques. Recently, LDPC coding has gained much attention. The bit error rate (BER) performance of the LDPC-coded multi-code MC-CDMA degrades in a severe frequency-selective fading channel due to the inter-code interference (ICI). The frequency-domain adaptive interference cancellation (FDAIC) has been proposed to reduce the ICI. In this paper, we propose adaptive modulation in an LDPC code word and the use of FDAIC for LDPC-coded MC-CDMA HARQ. The throughput performance in a frequency selective Rayleigh fading channel is evaluated by computer simulation.

  457. B-1-214 Property Evaluation of W-CDMA Adaptive Array Antenna

    Suguro Tomohiro, Yuan Qiaowei, Chen Qiang, Sawaya Kunio, Kudo Eisuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2006 (1) 214-214 2006/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  458. On the Optimum Number of Hops in a Multi-Hop DS-CDMA Virtual Cellular Network using On-Demand Channel Assignment

    EL ALAMI Lalla Soundous, KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 105 (623) 187-192 2006/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    A multi-hop virtual cellular network (VCN) was proposed for future mobile communication systems. In VCN, there are two methods of channel assignment; the pre-assignment and on-demand channel assignment. In this paper we will give a simple comparison of the two methods and give a reason why we will focus our research on the on-demand channel assignment from now-on. In a multi-hop VCN using on-demand channel assignment, increasing the number of hops leads to a less transmit power of the multi-hop links and hence to a decreased interference to other users, this can decrease the call blocking probability. On the other hand, increasing the number of the call links might increase the blocking probability of this call. In this paper, we give an analysis about this tradeoff and show the impact of the number of hops on the blocking probability of a DS-CDMA multi-hop VCN. Simulation results are presented to show that there is an optimum value of number of hops depending on some network conditions.

  459. Relay skipping method to avoid the call blocking in a Multi-Hop DS-CDMA Virtual Cellular Network

    El Alami Lalla Soundous, Kudoh Eisuke, Adachi Fumiyuki

    Technical report of IEICE. RCS 105 (560) 41-46 2006/01/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    A multi-hop virtual cellular network (VCN) was proposed for future mobile communication systems. In VCN, the transmitted signal from a mobile terminal is relayed via multi-hop links to the central port, which is a gateway to the core network. In the conventional multi-hop VCN, a call is blocked when there is no channel available at one link over the multi-hop route. In this paper, we propose a relay skipping method to avoid the call blocking in a DS-CDMA VCN. Computer simulation is conducted to evaluate the impact of the proposed method on the blocking probability of the multi-hop VCN and make comparison with the present cellular network as well.

  460. Performance Analysis of Joint STTD and Receive Antenna Diversity with MMSE-FDE for OFDM/TDM

    GACANIN Haris, TAKAOKA Shinsuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 105 (559) 47-51 2006/01/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this paper, a theoretical BER analysis of orthogonal frequency division multiplexing combined with time division multiplexing (OFDM/TDM) is presented for joint use of space-time transmit diversity (STTD) and receive antenna diversity with minimum mean square error (MMSE) frequency-domain equalization (FDE). The conditional BER expression is derived, based on a Gaussian approximation of the inter-symbol interference (ISI) arising from channel frequency-selectivity, for the given set of channel gains. The average BER performance is evaluated by Monte-Carlo numerical computation method using the derived conditional BER expression.

  461. Frequency-domain Adaptive Antenna Array for Single-carrier Transmission

    河内涼子, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (623(RCS2005 178-228)) 2006

    ISSN: 0913-5685

  462. BER Performance Analysis of MC-CDMA with Overlap FDE

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 106 (223(RCS2006 105-132)) 2006

    ISSN: 0913-5685

  463. Transmit Performance of E-SDM with Frequency Domain Equalization

    尾崎一幸, 中島昭範, 安達文幸

    電子情報通信学会技術研究報告 105 (623(RCS2005 178-228)) 2006

    ISSN: 0913-5685

  464. Link capacity of MC-CDMA downlink with adaptive subcarrier allocation and transmit power control

    三井久士, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 106 (168(RCS2006 59-104)) 2006

    ISSN: 0913-5685

  465. Channel Estimation Using Successive Cancellation In a Channel Having Fractionally Space Time Delay Paths

    KU Richol, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 105 (623(RCS2005 178-228)) 2006

    ISSN: 0913-5685

  466. Equivalence of Pre-FFT and Post-FFT OFDM Adaptive Antenna Array

    KANG Byeong-Woo, 中村理, 安達文幸

    電子情報通信学会技術研究報告 106 (119(RCS2006 35-58)) 2006

    ISSN: 0913-5685

  467. Single-Carrier Transmission with Frequency-Domain Equalization Using Tomlinson-Harashima Precoding

    武田一樹, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 106 (119(RCS2006 35-58)) 2006

    ISSN: 0913-5685

  468. Bit error rate analysis of joint Tomlinson-Harashima precoding and frequency-domain equalization

    武田一樹, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 106 (360(RCS2006 157-174)) 2006

    ISSN: 0913-5685

  469. HARQ throughput performance of DS-CDMA frequency-domain equalization with ICI cancellation

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 106 (223(RCS2006 105-132)) 2006

    ISSN: 0913-5685

  470. Turbo Equalization for DS-CDMA with Frequency-domain Equalization

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 106 (43(RCS2006 18-34)) 2006

    ISSN: 0913-5685

  471. Throughput performance of iterative interference cancellation with 2D MMSE-FDE for multicode DS-CDMA MIMO multiplexing

    中島昭範, 安達文幸

    電子情報通信学会技術研究報告 105 (623(RCS2005 178-228)) 2006

    ISSN: 0913-5685

  472. Effect of STTD on frequency-domain downlink site diversity for DS-CDMA cellular systems

    佐藤裕高, 留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (623(RCS2005 178-228)) 2006

    ISSN: 0913-5685

  473. BER Performance of MC DS-CDMA with Frequency-domain Equalization

    田中健, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 106 (223(RCS2006 105-132)) 2006

    ISSN: 0913-5685

  474. BER Performance of Single-Carrier Transmission in A Channel Having Fractionally Spaced Time Delays

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (559(RCS2005 124-154)) 2006

    ISSN: 0913-5685

  475. BER Analysis of CDMA Uplink Transmission Using Frequency-interleaving

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (559(RCS2005 124-154)) 2006

    ISSN: 0913-5685

  476. Throughput performance of HARQ using multicode DS-CDMA with MMSE turbo equalization

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 106 (360(RCS2006 157-174)) 2006

    ISSN: 0913-5685

  477. Effect of ICI cancellation on DS-CDMA frequency-domain equalization without GI

    武田和晃, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 105 (623(RCS2005 178-228)) 2006

    ISSN: 0913-5685

  478. Throughput Performance of Frequency-domain Iterative SIC with 2 Dimensional MMSE-FDE for SC-MIMO Multiplexing

    中島昭範, 安達文幸

    電子情報通信学会技術研究報告 105 (559(RCS2005 124-154)) 2006

    ISSN: 0913-5685

  479. A Relay Skipping Method For a Multi-Hop DS-CDMA Virtual Cellular Network

    Lalla Soundous El Alami, Eisuke Kudoh, Fumiyuki Adachi

    2006 IEEE 64TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 2534-2538 2006

    ISSN: 1090-3038

  480. OFDM adaptive antenna array with frequency-domain weight updating and delay time-domain channel estimation

    NAKAMURA Osamu, TAKAOKA Shinsuke, KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 105 (411) 19-24 2005/11/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Adaptive antenna array is attractive for uplink signal transmission in mobile communication systems since it can suppress the multiaccess interference. Adaptive antenna array in OFDM systems is classified into Pre- and Post-FFT type. It is well known that the Pre-FFT type achieves faster weight convergence than Post-FFT type because Pre-FFT type can update weight at each received sampling. On the other hand, we showed that frequency-domain updating also could achieve a fast weight convergence so that it could update weight the number of subcarriers times per OFDM symbol under ideal channel estimation. However, this proposal needs channel state information for reference signal and channel estimation error may degree the BER performance. In this paper, we show by computer simulation that a fast weight convergence can be achieved and a good tracking ability against fading can be obtained using delay time-domain channel estimation.

  481. W-CDMA Receiver with Adaptive 4-Antenna Array

    YUAN Qiaowei, CHEN Qiang, SAWAYA Kunio, KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report. Antennas and propagation 105 (355) 89-94 2005/10/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    W-CDMA receiver with adaptive 4-element array antenna is developed. The adaptive algorithm is programmed and loaded in DSP which can be changed for the investigation of effects of various adaptive algorithms. The effects of RF circuit, adaptive algorithm and array antenna configuration on the performance of W-CDMA receiving system without fading are investigated.

  482. The Throughput Performance of LDPC Coded HARQ for MC-CDMA

    FUKUDA Kaoru, NAKAJIMA Akinori, ADACHI Fumiyuki

    Technical report of IEICE. RCS 105 (240) 79-84 2005/08/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Broadband packet access techniques will be required for the next generation mobile communications systems. Hybrid ARQ (HARQ) is one of the promising error control techniques. Recently, LDPC coding is gaining much attention. Multi-carrier code division multiple access (MC-CDMA), which uses a number of subcarriers to reduce the ISI resulting from frequency selective channels, has been attracting a lot of attention. In this paper, we consider LDPC-coded HARQ for an MC-CDMA system and evaluate, by the computer simulation, its throughput in a frequency selective fading environment. It is shown that the use of larger spreading factor gives higher throughput unlike turbo-coded HARQ and the type II HARQ provides a good throughput. It is also shown that the LDPC-coded HARQ has a possibility to provide a better throughput performance than turbo-coded HARQ.

  483. Modified Rerouting Algorithm for a Multi-hop Virtual Cellular Network

    DAOU Imane, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 105 (240) 7-12 2005/08/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In the multi-hop virtual cellular network (VCN), many wireless ports are distributed in each VC and the transmitted signal from/to a mobile user is relayed by the multi-hop technique to/from a central port which acts as a gateway to the network. According to the long term change of propagation environment and traffic distribution, addition and removal of wireless ports are necessary in order to get the adequate network topology. Hence, the route reconstruction is an important technical issue. In this paper, we propose a modified rerouting algorithm for port addition and removal, then we analyze theoretically the time and number of messages for route reconstruction, and evaluate the transmit power efficiency by computer simulation.

  484. B-5-136 Limitation effect of retransmission on throughput and residual packet error rate for DS-CDMA packet communication

    WANG ZhiSen, KUDOH Eisuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2005 (1) 585 2005/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  485. BS-9-7 EFFECT OF AMPLITUDE LIMITATION ON THE BER PERFORMANCE OF THE OFDM/TDM WITH FREQUENCY-DOMAIN EQUALIZATION(BS-9. Broadband wireless communications techniques)

    GACANIN Haris, TAKAOKA Shinsuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2005 (1) "SE-13"-"SE-14" 2005/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  486. BS-9-8 Frequency-domain Differential Detection and Equalization of Differentially Encoded DS-CDMA Signals(BS-9. Broadband wireless communications techniques)

    LIU Le, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2005 (1) "SE-15"-"SE-16" 2005/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  487. B-5-233 Transmit Power Efficiency of Multi-Hop Hybrid Selection/MRC Diversity for a DS-CDMA Virtual Cellular Network

    DAOU Imane, KUDOH Eisuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2005 (1) 682-682 2005/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  488. B-5-134 A Study on Selection of End Cluster Head Port in a Multi-hop Virtual Cellular Network

    KUDOH Eisuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2005 (1) 583-583 2005/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  489. Impact of Shadowing Correlation on Reverse Link Capacity of DS-CDMA Cellular System

    Arif Junaidi, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 104 (680) 7-12 2005/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In high-speed mobile communication, the transmission performance is degraded by frequency selective fading channel, but in DS-CDMA it can be improved by employing the Rake receiver. In the reverse link of DS-CDMA, transmit power control (TPC) is an indispensable technique to mitigate the near-far problem. Independent shadowing losses are often assumed for evaluating the link capacity of DS-CDMA cellular systems. However, shadowing losses may be partially correlated since the obstacles surrounding a mobile station block similarly the desired signal and interfering signals. In this paper, we investigate how the shadowing correlation impacts the reverse-link capacity in DS-CDMA cellular system, by computer simulation.

  490. Adaptive Route Reconstruction Algorithm for Multi-hop Virtual Cellular Network

    DAOU Imane, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 104 (679) 63-68 2005/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In the multi-hop virtual cellular network (VCN), the route construction is an important technical issue. However, because of the malfunction of some ports or some interference obstacles in a link between wireless ports, some link or port failure may occur. In this paper, we propose a table-driven route reconstruction algorithm based on the minimum transmit power criterion in order to reconstruct rapidly the multi-hop route when a link or port failure occurs. The transmit power rise and the distribution of the increased number of hops in the case of a link failure are evaluated by computer simulation.

  491. 周波数領域等化を用いるOFDM/TDMにおけるチャネル推定

    GACANIN Haris, TAKAOKA Shinsuke, ADACHI Fumiyuki

    104 (676) 69-74 2005/02/24

    ISSN: 0913-5685

  492. MC-CDMA セルラ方式における下りリンクサイトダイバーシチの理論検討(MoMuC 特別セッション「モバイルとホームネットワーク連携」, 移動通信ワークショップ)

    ALI Arny, INOUE Takamichi, ADACHI Fumiyuki

    IEICE technical report. WBS, Wideband System 104 (673) 45-50 2005/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    セルラ方式では, セル境界のユーザは, 受信信号レベルが弱いことと他セルからの大きな干渉を受けるために伝送特性が劣化する.これを解決するのがサイトダイバーシチである.また, アンテナダイバーシチを併用することによって, 更に伝送特性を改善することができる.本論文では, MC-CDMA下りリンクを対象に, 自セル及び他セル干渉のガウス近似を用いて周波数選択性フェージング環境下のMC-CDMA下りリンクの条件付BERの理論式を導出している.また, モンテカルロ数値計算手法により平均BERを求め, その累積分布からアウテージ確率を求め, 下りリンク容量を求めている.理論計算結果と計算機シミュレーション結果とを比較し, 理論検討の妥当性を確認している. The downlink (base-to-mobile) bit error rate (BER) performance for a mobile user with relatively weak received signal in a multicarrier-CDMA (MC-CDMA) cellular system can be improved by utilizing the site diversity reception. With joint use of MMSE-based frequency domain equalization (FDE) and antenna diversity combining, the site diversity operation will increase the downlink capacity. In this paper, an expression for the theoretical conditional BER for the given set of channel gains is derived based on Gaussian approximation of the interference components. The local average BER is then obtained by averaging the conditional BER over the given set of channel gains using Monte-Carlo numerical method. The outage probability is measured from the numerically obtained cumulative distribution of the local average BER to determine the downlink capacity. Results from theoretical computation are compared to the results from computer simulation and discussed.

  493. マルチホップバーチャルセルラネットワークにおける適応経路再構築アルゴリズム

    DAOU Imane, KUDOH Eisuke, ADACHI Fumiyuki

    104 (676) 63-68 2005/02/24

    ISSN: 0913-5685

  494. MC-CDMAセルラ方式における下りリンクサイトダイバーシチの理論検討

    ALI Arny, INOUE Takamichi, ADACHI Fumiyuki

    104 (682) 45-50 2005/02/24

    ISSN: 0913-5685

  495. 2次元OVSF拡散符号を用いるチップインターリーブ DS-CDMA(MoMuC特別セッション「モバイルとホームネットワーク連携」, 移動通信ワークショップ)

    LIU Le, ADACHI Fumiyuki

    IEICE technical report 104 (682) 33-38 2005/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    複数ユーザが同時に基地局にアクセスする上りリンクでは, ユーザ間の直交性が保たれず, MUI(Multi-user interference)が発生し, 特性が大幅に劣化してしまう.そこで本論文では, 2次元OVSF拡散とチップインターリーブを用いでMUIを低減するDS-CDMAを提案する.本提案では, MUIを低減できるので信号判定にシングルユーザの周波数領域MMSE等化を用いている.リンク容量を増加することができるとともに, マルチレート伝送も可能である.また, マルチユーザ環境下での周波数選択性フェージングチャネルにおけるビット誤り率(BER)特性を計算機シミュレーションによって明らかにしている. Multiuser interference (MUI) limits the transmission performance of the DS-CDMA uplink. In this paper, we propose a 2-dimensional (2-D) OVSF spreading and chip-interleaving to transform the multi-user channel into orthogonal single-user channels. Due to MUI cancellation, the chip-interleaved DS-CDMA with 2-D OVSF spreading has ability to increase the link capacity as well as to provide multi-rate services. Single-user frequency-domain equalization based on the minimum mean square error (MMSE) criterion is applied for signal detection. The transmission performance in a multiuser and frequency-selective fading environment is evaluated by computer simulation.

  496. On-Demand Channel Assignment for Multi-Hop DS-CDMA Virtual Cellular Network using Channel Segregation algorithm

    El Alami Lalla Soundous, Kudoh Eisuke, Adachi Fumiyuki

    Technical report of IEICE. RCS 104 (679) 57-62 2005/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    A multi-hop virtual cellular network (VCN) was proposed for future mobile communication systems. In VCN, transmitted signal from a mobile terminal is relayed via multi-hop links to the central port, which is a gateway to the core network. In this paper, an "on-demand" channel assignment strategy, using the channel segregation dynamic channel allocation (CS-DCA) algorithm, is proposed for multi-hop DS-CDMA VCN. Computer simulation is conducted to evaluate the blocking probability performance and make a comparison between the VCN and the present cellular network.

  497. Throughput of Slotted ALOHA DS-CDMA with Random TPC in a Multi-cell Environment

    WANG ZhiSen, KUDOH Eisuke, ADACHI Fumiyuki

    電子情報通信学会技術研究報告 104 (596) 149-153 2005/01/21

    ISSN: 0913-5685

  498. Transmit Power Efficiency of Multi-Hop MRC Diversity for a DS-CDMA Virtual Cellular Network

    DAOU Imane, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 104 (597) 19-24 2005/01/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In virtual cellular network (VCN), proposed for high-speed packet mobile communications, the signal transmitted from a mobile terminal is received by wireless ports distributed in each virtual cell and relayed to the central port that acts as a gateway to the core network. In this paper, multi-hop maximal ratio combining (MHMRC) diversity is presented for the VCN to reduce the transmit power while achieving the required communication QoS. The transmit power efficiency is evaluated by computer simulation for a DS-CDMA VCN.

  499. Distributed Layered Mobility Management for Multi-hop Virtual Cellular Network

    KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 104 (597) 13-17 2005/01/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, we have proposed a multi-hop virtual cellular network (VCN), which consists of a central port (a gateway to the core network) and many distributed wireless ports in each virtual cell (VC), for reducing the transmit power in broadband DS-CDMA mobile communications systems. Each mobile terminal simultaneously communicates with surrounding wireless ports. For mobility management, the mobile terminal location registration is essential. To reduce the location registration control message traffic, we introduce a distributed mobility management scheme, in which the central port supports the intra-VC mobility management and the control station in the core network supports the inter-VC mobility management. The location data in the control station is updated only when a mobile terminal crosses the VC area boundary. This scheme can significantly reduce the location registration traffic.

  500. Foreword

    Akihisa Ushirokawa, Takeo Ohgane, Kei Sakaguchi, Hideki Ochiai, Takashi Ohira, Mamoru Sawahashi, Wu Gang, Fumiyuki Adachi, Da Shan Shu, Kazuo Mori, Ryu Miura, Yasuyuki Oishi, Stefan Keiser, Yasunori Iwanami, Kazuhiko Fukawa, Masaaki Katayama, Yasushi Yamao, Tomoaki Ohtsuki, Yongnam Han, Eisuke Kudoh, Zhou Zheng, Makoto Taromaru, Seiichi Sampei, Akihiro Shibuya, Arne Svensson, Li-Chun Wang, Toshiyuki Maeyama, Shigeaki Ogose, Hiroyuki Tsuji, Hideyuki Uehara, Mutsumu Serizawa, Paul H. Wittke, Mitsuru Uesugi, Satoshi Shimizu, Nevio Benvenuto

    IEICE Transactions on Communications E88-B 1-2 2005/01/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1093/ietcom/e88-b.1.1  

    ISSN: 0916-8516

    eISSN: 1745-1345

  501. A Study of a Viewing Interface for Searching Images in a Museum

    KAMIJIMA Fumiyuki, ADACHI Fumio, SUZUKI Takuzi, TOKUNAGA Yukio

    Proceedings of the Annual Conference of the Institute of Image Electronics Engineers of Japan 33 201-202 2005

    Publisher: The Institute of Image Electronics Engineers of Japan

    DOI: 10.11371/aiieej.33.0.201.0  

    ISSN: 2436-4371

    eISSN: 2436-4398

  502. Frequency-domain Adaptive Interference Cancellation for Multicode CDMA Signal Transmission

    石原浩一, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (411(RCS2005 107-123)) 2005

    ISSN: 0913-5685

  503. Adaptive-modulated Hybrid ARQ for MIMO multiplexing using iterative PIC

    中島昭範, 安達文幸

    電子情報通信学会技術研究報告 105 (411(RCS2005 107-123)) 2005

    ISSN: 0913-5685

  504. Frequency-domain differential encoding/decoding in single-carrier DS-CDMA

    LIU L, 安達文幸

    電子情報通信学会技術研究報告 104 (599(RCS2004 290-323)) 2005

    ISSN: 0913-5685

  505. Bit Error Rate Analysis of OFDM with delay time domain channel estimation

    KU Richol, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 105 (411(RCS2005 107-123)) 2005

    ISSN: 0913-5685

  506. Throughput Performance of Frequency-domain Iterative PIC with 2 Dimensional MMSE Weight for SC-MIMO Multiplexing

    中島昭範, 安達文幸

    電子情報通信学会技術研究報告 105 (356(RCS2005 85-106)) 2005

    ISSN: 0913-5685

  507. DS-CDMA frequency-domain equalization with inter-block interference suppression

    武田和晃, 留場宏道, 安達文幸

    電子情報通信学会技術研究報告 105 (88(RCS2005 16-26)) 2005

    ISSN: 0913-5685

  508. Effect of spreading factor for multicode DS-CDMA MIMO Multiplexing using Frequency-domain Iterative Parallel Interference Cancellation

    中島昭範, GARG D, 安達文幸

    電子情報通信学会技術研究報告 104 (599(RCS2004 290-323)) 2005

    ISSN: 0913-5685

  509. B-5-67 Multi-antenna Pre-Equalization for Single Carrier/TDD System Transmission

    TOMEBA Hiromichi, TAKEDA Kazuaki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2005 (1) 516 2005

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  510. Link Capacity and Throughput of DS-CDMA Slotted ALOHA using Frequency-band Division and Random Transmit Power Control

    WANG ZhiSen, 工藤栄亮, 安達文幸

    電子情報通信学会技術研究報告 105 (88(RCS2005 16-26)) 2005

    ISSN: 0913-5685

  511. B-5-101 Performance of SC-MIMO Multiplexing with Frequency-Domain Iterative PIC using Multi-level Modulation

    Nakajima Akinori, Garg Deepshikha, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2005 (1) 550 2005

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  512. Frequency-domain equalization with Inter-Block Interference for Multi-Carrier Transmission

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (88(RCS2005 16-26)) 2005

    ISSN: 0913-5685

  513. Downlink site diversity with frequency-domain equalization for DS-CDMA cellular systems

    佐藤裕高, 留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (240(RCS2005 64-84)) 2005

    ISSN: 0913-5685

  514. Space-time block coded transmit/receive diversity using 4 receive antennas for multi-carrier transmissions

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (196(RCS2005 40-63)) 2005

    ISSN: 0913-5685

  515. The Transmission Performance of Multi-code DS-CDMA with Frequency-Domain Equalization using Space-Time Cyclic Delay Transmit Diversity

    河内涼子, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (356(RCS2005 85-106)) 2005

    ISSN: 0913-5685

  516. B-5-66 Pilot-assisted Decision Feedback Channel Estimation for STBC Decoding in DSSS Frequency-domain Equalization

    ISHIHARA Koichi, TAKEDA Kazuaki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2005 (1) 515 2005

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  517. Iterative frequency-domain ICI canceller for improving DS-CDMA signal transmission performance

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (599(RCS2004 290-323)) 2005

    ISSN: 0913-5685

  518. Throughput Performance of Turbo Coded HARQ with E-SDM

    尾崎一幸, 中島昭範, 安達文幸

    電子情報通信学会技術研究報告 105 (356(RCS2005 85-106)) 2005

    ISSN: 0913-5685

  519. B-5-4 Pilot-assisted MMSE channel estimation for DS-CDMA frequency-domain equalization

    Takeda Kazuaki, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2005 (1) 453 2005

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  520. Effect of Channel Estimation Error for OFDM/TDM

    高岡辰輔, GACANIN H, 安達文幸

    電子情報通信学会技術研究報告 104 (598(RCS2004 259-289)) 2005

    ISSN: 0913-5685

  521. 超高速無線通信のためのバーチャルセルラシステムにおけるマルチホップネットワークリソース割当て法に関する研究

    工藤栄亮, 安達文幸

    電気通信普及財団研究調査報告書(CD-ROM) (20) 2005

    ISSN: 1346-0404

  522. Performance comparison of DS-CDMA and MC-CDMA with Frequency-domain MAI Canceller

    石原浩一, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (677(AP2004 303-345)) 2005

    ISSN: 0913-5685

  523. Study on transmit/receive antenna diversity for multi-carrier transmission

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (598(RCS2004 259-289)) 2005

    ISSN: 0913-5685

  524. Uplink BER Performance Comparison of Single-carrier Multi-access and Multi-carrier Multi-access

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (677(AP2004 303-345)) 2005

    ISSN: 0913-5685

  525. BER Performance Analysis of DS-CDMA with Frequency-domain Pre-equalization

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (411(RCS2005 107-123)) 2005

    ISSN: 0913-5685

  526. Application of Cyclic Delay Transmit Diversity to DS-CDMA using Frequency-domain Equalization

    河内涼子, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (677(AP2004 303-345)) 13-18 2005

    ISSN: 0913-5685

  527. Throughput Performance of MC-CDMA HARQ with Adaptive Variable Spreading Factor

    高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 105 (196(RCS2005 40-63)) 2005

    ISSN: 0913-5685

  528. DS-CDMA Frequency-domain Multi-access Interference Canceller

    石原浩一, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (599(RCS2004 290-323)) 2005

    ISSN: 0913-5685

  529. Development of Digital Power Line Carrier for Power Transmission Lines

    佐々木範雄, 清野賢一, 織田健志, 花海丞, 安達文幸

    電気学会通信研究会資料 CMN-05 (15-21) 21-26 2005

  530. B-5-14 Performance Comparison of DS- and MC-CDMA using Cyclic Delay Transmit Diversity and Frequency-domain Equalization

    Kawauchi Ryoko, Takeda Kazuaki, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2005 463 2005

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  531. Throughput performance of DS-CDMA MIMO multiplexing with frequency-domain iterative PIC

    中島昭範, GARG Deepshikha, 安達文幸

    電子情報通信学会技術研究報告 104 (675(AP2004 237-278)) 19-24 2005

    ISSN: 0913-5685

  532. Frequency-domain adaptive ICI cancellation for DS-CDMA signal transmission

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 105 (240(RCS2005 64-84)) 2005

    ISSN: 0913-5685

  533. Performance Evaluation for Frequency-domain Pre-equalization with Space-Time block coding Transmit/Receive diversity in DS-CDMA Mobile Radio

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (677(AP2004 303-345)) 1-6 2005

    ISSN: 0913-5685

  534. B-5-61 Convergence Property of Adaptive Antenna Array for MC-CDMA

    Nakamura Osamu, Inoue Takamichi, Kudoh Eisuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2005 510-510 2005

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  535. Effect of Band Division and Channel Segregation in A DS-CDMA Cellular System

    SUGAWARA Suguru, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 104 (440) 25-29 2004/11/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    In DS-CDMA cellular communications systems, the single frequency reuse is utilized and hence large co-channel interference is produced. Recently, authors proposed to divide the available wide frequency band into several narrow frequency bands and to assign the different frequency bands to adjacent cells using channel segregation algorithm, so as to avoid the large other cell interference. In conventional DS-CDMA cellular systems, the soft hand-off can be applied to increase the link capacity (this is only possible when the single frequency reuse is utilized). In this paper, we compare by computer simulation the link capacity of DS-CDMA using band division and channel segregation algorithm and that of conventional DS-CDMA using soft hand-off.

  536. Cellular communications

    E. Kudoh, F. Adachi

    Journal of IEICE 87 (10) 829-831 2004/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5693

  537. Channel segregation dynamic channel allocation for multi-hop virtual cellular network

    KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report 104 (183) 67-71 2004/07/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    There have been strong demands for higher speed data transmissions in mobile communications. To reduce the peak transmit power while increasing the data transmission rates, authors proposed a wireless multi-hop virtual cellular network (VCN). In the wireless multi-hop VCN, the transmitted signal from a mobile terminal is received by multiple wireless ports distributed in a virtual cell and relayed via other wireless ports using a wireless multi-hop communication technique to a central port which is connected to the core network. We proposed a channel allocation algorithm for multi-hop communication, based on the dynamic channel allocation using the channel segregation algorithm (CS-DCA). In this paper, we compare the channel allocation failure rate performance of CS-DCA with the conventional fixed channel allocation (FCA) failure rate.

  538. Frequency Reuse Efficiency of A DS-CDMA Cellular System Using Band Division and Channel Segregation

    SUGAWARA Suguru, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 104 (62) 19-23 2004/05/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    In DS-CDMA cellular communications systems, the single frequency reuse is utilized and hence large co-channel interference is received from other cells. If the single frequency reuse is not utilized to reduce the other-cell interference, we will face the frequency allocation problem, similar to FDMA systems. In this paper, we divide the available wide frequency band into several narrow frequency bands and try to assign the different frequency bands to adjacent cells so as to avoid the large other cell interference. For the assignment of the frequency bands, we propose to apply the channel segregation algorithm. We evaluate the link capacity by computer simulation to show that the link capacity can be increased by using band division and channel segregation algorithm.

  539. SB-9-3 GENERALIZED OFDM WITH FREQUENCY-DOMAIN EQUALIZATION IN A FREQUENCY SELECTIVE RAYLEIGH FADING CHANNEL(SB-9. Broadband wireless access techniques for the next generation wireless communications)

    GACANIN Haris, TAKAOKA Shinsuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) "SE-69" 2004/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  540. SB-9-2 PERFORMANCE COMPARISON OF TURBO CODED MC-CDMA AND DS-CDMA WITH HIGHER LEVEL MODULATION(SB-9. Broadband wireless access techniques for the next generation wireless communications)

    Garg Deepshikha, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) "SE-68" 2004/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  541. B-5-120 A Study on Central Port Location Arrangement in a Wireless Multi-hop Virtual Cellular Communications System

    KUDOH Eisuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 607-607 2004/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  542. B-5-149 Reverse Link Performance of Site Diversity based Transmit Power Control with Antenna Diversity and Rake Combining in DS-CDMA Mobile Radio

    Alam Mahbub, Kudoh Eisuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 636-636 2004/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  543. 移動通信ワークショップ

    ガチャニン ハリス, 高岡 辰輔, 安達 文幸

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 103 (677) 1-176 2004/03/03

    Publisher: 東京 : 電子情報通信学会

    ISSN: 0913-5685

    More details Close

    記事種別: 特集 ; 会議・学会報告・シンポジウム

  544. Performance of distributed dynamic channel assignment for a multi-hop virtual cellular system in multipath fading channel

    KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 103 (681) 19-23 2004/02/26

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    There have been strong demands for higher speed data transmissions in mobile communications. To reduce the peak transmit power while increasing the data transmission rates, authors proposed a wireless multi-hop virtual cellular system. In the multi-hop virtual cellular system, the transmitted signal from a mobile terminal is received by wireless ports distributed in a virtual cell and relayed via wireless ports using a wireless multi-hop communication technique to a central port connected to the network. We proposed a channel allocation algorithm based on the dynamic channel allocation (DCA) using the channel segregation algorithm. In DS-CDMA, Rake receiver can combine the delayed versions of a signal. As the number of propagation paths increases, the Rake combining effect also increases, but, the inter-path-interference increases, thereby degrading the transmission performance. In this paper, we evaluate the DCA failure rate in a frequency selective fading channel for DS-CDMA multihop virtual cellular system.

  545. Chip Interleaving for DS-CDMA with Frequency Domain Equalization in a Frequency Selective Rayleigh Fading Channel

    GARG Deepshikha, ADACHI Fumiyuki

    IEICE technical report. Antennas and propagation 103 (677) 7-12 2004/02/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    More details Close

    DS-CDMA with frequency domain minimum mean square error (MMSE) equalization can provide much better performance than that with rake combining in a frequency selective fading channel. Chip interleaving is a form of channel interleaving that improves the DS-CDMA performance by converting the channel into a highly time selective channel. When frequency domain equalization is used, the frequency selectivity of the channel is thoroughly exploited. In this paper we apply chip interleaving to DS-CDMA with frequency domain MMSE equalization to see if the performance can be further improved. It is found that chip interleaving improves the performance for all channel conditions. In addition, chip interleaving is beneficial in the presence of turbo coding and antenna diversity as well.

  546. Forward Link Performance of Site Selection Diversity Transmit with Antenna Diversity and Rake Combining in DS-CDMA Mobile Radio

    ALAM Mahbub, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 103 (680) 13-18 2004/02/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this paper, it is theoretically shown that the optimal solution to maximize the DS-CDMA forward link capacity under the condition of constant total transmit power is to transmit only from the best base station (BS) that has the maximum channel gain (this is called site selection diversity transmit (SSDT)). This theoretical analysis is confirmed by the Monte-Carlo computer simulation of an instantaneous SSDT which is based on instantaneous channel gain. In addition we also consider the case of average power based SSDT to study the difference of these two types of SSDT and their effects on forward link capacity.

  547. Performance Evaluation of Random Transmit Power Control for DS-CDMA/TDD Cellular Packet Mobile Radio

    WANG ZhiSen, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 103 (553) 17-22 2004/01/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    It is known that in wireless packet communications the so called capture effect can be expected if the received signal is given certain power variations. Previously we have proposed a random TPC method. In this method, since received signal power variations are intentionally given in order to obtain capture effect, the link capacity is much larger than that of the conventional fast and slow TPC schemes irrespective of the number of propagation paths. In this paper, the link capacity of DS-CDMA/TDD packet cellular system with random TPC is evaluated by computer simulation and the impacts of various propagation parameters are discussed. The results show that the proposed random TPC scheme provides larger link capacity than the conventional fast and slow TPC schemes under any propagation condition.

  548. Failure rate performance of distributed dynamic channel assignment for a multi-hop virtual cellular system

    KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 103 (553) 113-117 2004/01/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    There have been strong demands for higher speed data transmissions in mobile communications. To reduce the peak transmit power while increasing the data transmission rates, authors proposed a wireless multi-hop virtual cellular system. In the multi-hop virtual cellular system, the transmitted signal from a mobile terminal is received by wireless ports distributed in a virtual cell and relayed via wireless ports using a wireless multi-hop communication technique to a central port connected to the network. We proposed a channel allocation algorithm based on the dynamic channel allocation (DCA) using the channel segregation algorithm. The DCA failure rate was evaluated by computer simulation to find that the failure rate is almost insensitive to the allowable number of hops. In this paper, we evaluate the impact of the radio propagation parameters (the path loss exponent a, the standard deviation a of shadowing loss and the fading correlation p between the control frequency channel and traffic frequency channel) to the DCA failure rate.

  549. Throughput of Slotted ALOHA DS-CDMA with Random TPC in a Single-cell Environment

    WANG Z, 工藤栄亮, 安達文幸

    電子情報通信学会技術研究報告 104 (257(RCS2004 120-135)) 2004

    ISSN: 0913-5685

  550. マルチパスフェージング環境下における適応アンテナアレーのビット誤り率特性

    工藤 栄亮, 安達 文幸

    第6回DSP教育者会議 83-86 2004

  551. Throughput Performance of Hybrid ARQ in MIMO-OFDM

    中島昭範, GARG D, 安達文幸

    電子情報通信学会技術研究報告 104 (123(RCS2004 76-86)) 2004

    ISSN: 0913-5685

  552. Channel estimation method using FFT/IFFT for coherent DS-CMDA mobile radio in a fast fading channel

    高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 103 (548(SAT2003 136-145)) 2004

    ISSN: 0913-5685

  553. B-5-156 Code-multiplexed Pilot Assisted Frequency-domain Channel Estimation for DS-CDMA

    Takaoka Shinsuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 643 2004

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  554. B-5-106 Frequency Domain Transmit Equalization for Uplink MC-CDMA

    ABE Satoshi, TAKAOKA Shinsuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 593 2004

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  555. Iterative Channel Estimation for DS-CDMA Frequency-domain Equalization

    石原浩一, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (257(RCS2004 120-135)) 2004

    ISSN: 0913-5685

  556. Frequency Domain Transmit Equalization for Uplink MC-CDMA

    阿部聡, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 103 (682(RCS2003 353-389)) 2004

    ISSN: 0913-5685

  557. Bit Error Rate Analysis of DS-CDMA with Joint Frequency-Domain Equalization and Antenna Diversity Combining

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 103 (548(SAT2003 136-145)) 2004

    ISSN: 0913-5685

  558. B-5-109 Transmit Equalization Diversity for Improving MC-CDMA Uplnk Performance

    TOMEBA Hiromichi, TAKAOKA Shinsuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 596 2004

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  559. Frequency-domain Pre-equalization Transmit Diversity for DS-CDMA Mobile Radio

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (396(AP2004 153-178)) 2004

    ISSN: 0913-5685

  560. BER Performance of DS-CDMA with Frequency-domain Equalization using Pilot-assisted Channel Estimation

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (123(RCS2004 76-86)) 2004

    ISSN: 0913-5685

  561. Throughput of Hybrid ARQ in Single-carrier MIMO Multiplexing

    中島昭範, GARG D, 安達文幸

    電子情報通信学会技術研究報告 104 (258(RCS2004 136-153)) 2004

    ISSN: 0913-5685

  562. Pre-equalization for single carrier transmission

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (439(RCS2004 211-222)) 2004

    ISSN: 0913-5685

  563. Multi-stage Frequency-domain MAI Cancellation for DS-CDMA Uplink

    石原浩一, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (439(RCS2004 211-222)) 2004

    ISSN: 0913-5685

  564. Frequency-domain Pre-equalization Transmit Diversity for DS-CDMA Mobile Radio

    留場宏道, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (257(RCS2004 120-135)) 2004

    ISSN: 0913-5685

  565. B-5-181 Joint Effect of Turbo Coding and Frequency-domain Equalization in DS-CDMA

    Takeda Kazuaki, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 668 2004

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  566. Multi-carrier multi-access using frequency-interleaving and its uplink BER performance

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (440(RCS2004 223-235)) 2004

    ISSN: 0913-5685

  567. Joint effect of chip-level maximum likelihood detection and antenna diversity reception in DS-CDMA mobile radio

    斎藤昭裕, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 103 (682(RCS2003 353-389)) 2004

    ISSN: 0913-5685

  568. Pilot-assisted Channel Estimation Based on MMSE Criterion for DS-CDMA Frequency-domain Equalization

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (396(AP2004 153-178)) 2004

    ISSN: 0913-5685

  569. B-5-33 Iterative Adaptive Soft Parallel Interference Canceller for Turbo Coded MIMO Multiplexing

    Nakajima Akinori, Garg Deepshikha, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 520 2004

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  570. On selection of OVSF codes for MC-CDMA downlinks

    井上高道, GARG D, 安達文幸

    電子情報通信学会技術研究報告 104 (123(RCS2004 76-86)) 2004

    ISSN: 0913-5685

  571. Multi-access method using frequency-interleaving and frequency-domain equalization for broadband mobile radio

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (258(RCS2004 136-153)) 2004

    ISSN: 0913-5685

  572. The Uplink BER Performance of MC-CDMA with Frequency-domain Pre-equalization Transmit Diversity

    留場宏道, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 104 (63(RCS2004 56-69)) 2004

    ISSN: 0913-5685

  573. Chip-level Maximum Likelihood Detection for DC-CDMA in a Frequency-Selective Fading Channel

    斎藤昭裕, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 103 (548(SAT2003 136-145)) 2004

    ISSN: 0913-5685

  574. B-5-8 BER performance of OFDM with STTD using decision feedback channel estimation

    ISHIHARA Koichi, TAKEDA Kazuaki, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 495 2004

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  575. Pilot-assisted Decision Feedback Channel Estimation for OFDM-STTD

    石原浩一, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 104 (63(RCS2004 56-69)) 2004

    ISSN: 0913-5685

  576. B-5-84 Performance improvement by received antenna diversity for MC-CDMA site-diversity transmission

    Inoue Takamichi, Takaoka Shinsuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 571 2004

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  577. Transmission performance evaluation of single-carrier MIMO multiplexing

    中島昭範, GARG D, 安達文幸

    電子情報通信学会技術研究報告 104 (440(RCS2004 223-235)) 2004

    ISSN: 0913-5685

  578. A study on MC-CDMA Site-diversity under shadowing environment

    井上高道, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 103 (682(RCS2003 353-389)) 2004

    ISSN: 0913-5685

  579. Effect of Frequency-domain Pre-equalization on MC-CDMA/TDD Uplink Using Multi-level Modulation

    阿部聡, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 104 (440(RCS2004 223-235)) 2004

    ISSN: 0913-5685

  580. The Application of ICI Canceller for DS-CDMA Using Frequency-domain Equalization

    武田和晃, 安達文幸

    電子情報通信学会技術研究報告 103 (682(RCS2003 353-389)) 2004

    ISSN: 0913-5685

  581. A Study on Equivalence of Time- and Frequency-domain Channel Estimation for Multicarrier Signal Transmissions.

    高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 103 (680(RCS2003 303-332)) 2004

    ISSN: 0913-5685

  582. B-5-157 Effect of Power Delay Profile on Decision Feedback Chip-level Maximum Likelihood Detection in DS-CDMA Mobile Radio

    SAITO Akihiro, TAKAOKA Shinsuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2004 (1) 644 2004

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  583. Theoretical Analysis of Decision Feedback Chip-level Maximum Likelihood Detection in DS-CDMA Mobile Radio

    斎藤昭裕, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 104 (439(RCS2004 211-222)) 2004

    ISSN: 0913-5685

  584. Transmission Performance of DS-CDMA with MIMO Multiplexing using Frequency-domain Iterative Parallel Interference Cancellation

    中島昭範, GARG D, 安達文幸

    電子情報通信学会技術研究報告 104 (396(AP2004 153-178)) 2004

    ISSN: 0913-5685

  585. Transmission performance evaluation of single-carrier MIMO multiplexing

    中島昭範, GARG D, 安達文幸

    電子情報通信学会技術研究報告 104 (184(NS2004 68-83)) 2004

    ISSN: 0913-5685

  586. B-5-147 Frequency Reuse Efficiency of A DS-CDMA Cellular System Using Channel Segregation

    Sugawara Suguru, Kudoh Eisuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 634 634-634 2004

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  587. SB-8-1 Equivalence of Time-and Frequency-domain Channel Estimation for Multicarrier Signal Reception

    Takaoka Shinsuke, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 2003 (1) "SE-1"-"SE-2" 2003/09/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

  588. A Study on Wireless Port Location Arrangement in A Wireless Multi-hop Virtual Cellular Communications System

    KUDOH Eisuke, ADACHI Fumiyuki

    Proceedings of the Society Conference of IEICE 2003 (1) 497-497 2003/09/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  589. Theoretical Analysis of MC-CDMA Forward Link Performance in the Presence of Pure Impulsive Interference

    KUDOH Eisuke, ADACHI Fumiyuki

    IEICE Trans. Commun. 86 (8) 2425-2432 2003/08/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0916-8516

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    In this paper, expressions are derived for the hit error rate (BER) of the multicarrier-CDMA (MC-CDMA) downlink in the presence of pure impulsive interference and a frequency-selective fading and the BER performance is numerically evaluated by a Monte-Carlo simulation method. Minimum mean square error combining (MMSEC) and orthogonal restoration combining (ORC) are considered for frequency-domain equalization. The joint weight of antenna diversity reception using maximal ratio combining (MRC) and frequency equalization combining is derived. The MC-CDMA transmission performance in the presence of pure impulsive interference is compared with that of DS-CDMA transmission.

  590. Evolution towards broadband wireless systems

    Fumiyuki Adachi

    The 5th International Symposium on Wireless Personal Multimedia Communications 1 19-26 2003/06/25

    Publisher: IEEE

    DOI: 10.1109/wpmc.2002.1088126  

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    Convergence of wireless communications, computing and Internet is on the way. This will be the driving force towards a wireless multimedia society. In this paper, we overview today's standards of 3G cellular and wireless LAN systems. There are two trends complementing each other: enhancing the cellular technology (3G WCDMA, cdma2000, etc) and enhancing the wireless LAN technology (HiperLAN, IEEE 802.11, HiSWAN, etc). More or less, these two technologies have been evolving independently, but now, coordination between these two have been considered viable to realize the broadband communication era. Recently, discussions on 4/sup th/ generation (4G) wireless systems have been intensified. We foresee how wireless systems will evolve into global 4G wireless systems. In global 4G wireless, cellular and wireless LAN systems architectures may become closer and will work together via the IP core network. The difference between them may be that the former offers seamless handoff for real-time services but the latter offers seamless roaming for nomadic services, focusing on very high-speed data communications close to 1 Gbit/s.

  591. Muitihop routing construction for virtual cellular network

    KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 103 (128) 37-42 2003/06/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    A virtual cellular system, which consists of a central port and many distributed wireless ports, was proposed recently to show that the virtual cellular system can significantly reduce the transmit power while increasing frequency efficiency. In the virtual cellular system, data relaying between central port and wireless ports is necessary. In this paper, multi-hop wireless system is applied. The virtual cellular control layer is introduced for the multi-hop transmission. A routing algorithm which minimizes the total uplink transmit power is presented. The transmit power efficiency and the number of hops are evaluated by computer simulation. It is found that multi-hop communication can reduce the transmit power of wireless port considerably while avoiding unnecessary large time delay.

  592. Impact of Number of Wireless Ports in A Virtual Cellular System

    KUDOH Eisuke, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2003 (1) 569-569 2003/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  593. On Frequency Efficiency of Cellular Systems

    Sawa Kentarou, Katoh Akihito, Kudoh Eisuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2003 (1) 465-465 2003/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  594. A Fading Simulator for Generation of Multipath Fading with Arbitrary Arrival Angles

    Okuni Hidenori, Sao Tomoki, Kudoh Eisuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2003 (1) 474-474 2003/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  595. Impact of Shadowing Correlation on Spectrum Efficiency of Cellular System with Transmit Power Control

    SAWA Kentarou, KATOH Akihito, KUDOH Eisuke, ADACHI Fumiyuki

    IEICE technical report. Antennas and propagation 102 (672) 223-229 2003/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Independent shadowing losses are often assumed for computing the frequency reuse distance in a cellular system. For high mobile antenna heights, such an assumption is reasonable. However, shadowing losses may be partially correlated for low antenna heights, since the obstacles surrounding a mobile station can block similarly the desired signal and interfering signal. This paper investigates, by computer simulation, how the shadowing correlation impacts the frequency reuse distance in a power controlled FDMA cellular system.

  596. Transmit power and frequency efficiencies of virtual cellular mobile network

    KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 102 (675) 99-104 2003/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    Recently, major services provided by mobile communications systems are shifting from voice conversations to data communications and there is a great demand to increase the data transmission rate. However, there will be an important problem to overcome ; as data transmission rate becomes higher, the peak transmit power becomes larger. To decrease the peak transmit power while increasing the data transmission rate, the cell size should be made significantly small. However, in realizing nano- or even pico-cell network, the use of present cellular concept may not be optimal. In this paper, we propose a virtual cellular concept to realize pico-cell network and evaluate the transmit power and frequency efficiencies of the virtual cellular system, then compare them with that of the conventional cellular system.

  597. The latest trend of CDMA technology

    F. Adachi, M. Uesugi

    Journal of IEICE 86 (2) 96-102 2003/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5693

  598. On the Spreading Factor of Multicode MC-CDMA with RCPT Hybrid ARQ

    GARG D., Adachi Fumiyuki

    Proceedings of the IEICE General Conference 508 2003

    Publisher: The Institute of Electronics, Information and Communication Engineers

  599. Challenges for broadband mobile technology

    Fumiyuki Adachi

    Twelfth International Conference on Antennas and Propagation (ICAP 2003) 2003 1-4 2003/01/01

    Publisher: IEE

    DOI: 10.1049/cp:20030001  

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    A global wireless system is presented that provides broad ranges of services to cellular and nomadic users everywhere. A Giga-bps wireless access using DSCDMA and MC-CDMA is discussed. Wireless links are severely power-limited for such a Giga-bps wireless access. A virtual cell system concept that allows flexible installation of distributed wireless ports is presented.

  600. Effect of Fluctuated Transmit Power Control on Uplink Link Capacity of DS-CDMA Packet Mobile Communication

    WANG Z S, 工藤栄亮, 安達文幸

    電子情報通信学会技術研究報告 103 (66(RCS2003 30-43)) 2003

    ISSN: 0913-5685

  601. Residual Interference Power in Adaptive Narrowband Interference Canceller for DS-CDMA

    Seki Yuta, Takaoka Shinsuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2003 (1) 498 2003

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  602. Frequency and Space Diversity for Orthogonal Multicode DS-CDMA.

    板垣竹識, 佐尾智基, 安達文幸

    電子情報通信学会技術研究報告 102 (675(RCS2002 307-342)) 2003

    ISSN: 0913-5685

  603. The transmission performance with space and frequency-domain process for DS-CDMA

    武田和晃, 板垣竹識, 安達文幸

    電子情報通信学会技術研究報告 103 (66(RCS2003 30-43)) 2003

    ISSN: 0913-5685

  604. Transmission Performance of Space-Time Code Multiplexing Transmit Diversity in a Fast Fading Channel

    Takaoka Shinsuke, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2003 (1) 627 2003

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  605. On Frequency-domain Equalization for Single-carrier Transmission with Antenna Diversity Reception

    Takeda Kazuaki, Itagaki Takeshi, Kimura Ryohei, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2003 (1) 505 2003

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  606. Pilot-assisted Adaptive Interpolation Channel Estimation for OFDM Signals

    高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 103 (456(AP2003 145-179)) 2003

    ISSN: 0913-5685

  607. Joint effect of space-time transmit diversity and equalization on single carrier transmission

    武田和晃, 板垣竹識, 安達文幸

    電子情報通信学会技術研究報告 103 (126(CS2003 30-46)) 2003

    ISSN: 0913-5685

  608. Effect of space-time transmit diversity on orthogonal multi-code DS-CDMA

    板垣竹識, 武田和晃, 安達文幸

    電子情報通信学会技術研究報告 103 (126(CS2003 30-46)) 2003

    ISSN: 0913-5685

  609. Frequency-domain Equalization for MC-CDMA Site-diversity and Performance Evaluation

    井上高道, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 103 (458(AP2003 209-227)) 2003

    ISSN: 0913-5685

  610. Trends and views on broad-band wireless communication technology.

    安達文幸

    Probo (20) 2003

  611. ターボ符号化MIMOシステムにおける軟判定値生成法

    中島昭範, 木村良平, 安達文幸

    電子情報通信学会大会講演論文集 2003 2003

    ISSN: 1349-1369

  612. 室内における5.2GHz帯の電波伝搬特性

    佐々木範雄, 花海丞, 工藤貴之, 安達文幸

    電気学会全国大会講演論文集 2003 (3) 2003

  613. Application of space-time coded transmission diversity to DS-CDMA using frequency-domain equalization

    武田和晃, 板垣竹識, 安達文幸

    電子情報通信学会技術研究報告 103 (363(RCS2003 139-150)) 2003

    ISSN: 0913-5685

  614. Adaptive Prediction Iterative Channel Estimation for MC-CDMA Signal Reception in a Frequency Selective Fading channel.

    高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 102 (676(RCS2002 343-368)) 2003

    ISSN: 0913-5685

  615. A Study on Optimum Spreading Factor for Multi-code MC-CDMA.

    木村良平, 安達文幸

    電子情報通信学会技術研究報告 102 (676(RCS2002 343-368)) 2003

    ISSN: 0913-5685

  616. ディジタル伝送における送電線路雑音特性のモデル化

    花海丞, 佐々木範雄, 清野賢一, 安達文幸

    電気学会全国大会講演論文集 2003 (3) 2003

  617. Diversity Characteristics of Indoor Propagation for Wide band Transmission

    佐々木範雄, 花海丞, 工藤貴之, 安達文幸

    電気学会通信研究会資料 CMN-03 (8-19) 2003

  618. Pilot-Assisted Adaptive Channel Estimation Using Multiple Sets of Tap Weights for Coherent Rake Reception of DS-CDMA Signals

    高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 103 (254(RCS2003 117-130)) 2003

    ISSN: 0913-5685

  619. BER Performance of Downlink DS-CDMA with Chip Interleaving

    Itagaki Takeshi, Sao Tomoki, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2003 (1) 467 2003

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  620. Turbo Coded MIMO System with Adaptive Parallel Interference Canceller

    中島昭範, GARG D, 安達文幸

    電子情報通信学会技術研究報告 103 (66(RCS2003 30-43)) 2003

    ISSN: 0913-5685

  621. The Optimum Weights of Multi-Antenna Transmit and Receive Diversity in a Frequency Selective Fading Environment for DS-CDMA

    KATOH Akihito, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 102 (465) 85-90 2002/11/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this paper, we study DS-CDMA delay transmit diversity that transmits the time-delayed versions of the same signal from weighted multiple antennas in a frequency selective fading environment. At a receiver, multiple receive antennas are used and the received delayed signals are coherently combined by Rake receiver. The set of optimum antenna weights for maximizing the received signal-to-noise power ratio (SNR) is theoretically derived to show that the optimum solution is to transmit only from the best antenna that has the maximum equivalent channel gain after Rake combining. The improvement of the BER performance from conventional delay transmit diversity is theoretically analyzed and confirmed by computer simulations. The combined effect of transmit diversity and transmit power control (TPC) is also evaluated.

  622. Effect of the reference signal used for updating the weight of adaptive antenna array on the beam pattern

    SUZUKI Yusuke, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 102 (281) 53-58 2002/08/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    For adaptive antenna array, the antenna weights are updated adaptively so that mean square error between a reference and an array output can be minimized. In mobile communications, the propagation channel state varies rapidly because of multipath fading. Therefore, the tracking ability of adaptive algorithm to the fading is an important issue. In the case of normalized LMS algorithm used in the adaptive antenna array, the choice of reference signal determines the tracking ability. In this paper, we consider three reference signals for the normalized LMS algorithm: (a)fixed pilot, (b)instant pilot of array output, and (c)mean pilot of array output. We evaluate the convergence property, the tracking performance, and the BPSK transmission performance when the above three reference signals are used in the adaptive algorithm.

  623. 周波数選択性フェージングチャネルにおけるRCPTハイブリッドARQの特性評価

    GARG Deepshikha, KIMURA Ryohei, ADACHI Fumiyuki

    Technical report of IEICE. RCS 101 (682) 241-248 2002/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    符号分割マルチアクセス(DS-CDMA)におけるレート可変パンクチャターボ符号(RCPT)のスループット特性を計算機シミュレーションにより明らかにしている.フレーム長,パンクチャレート,拡散率,アンテナ数,フェージングレート,伝搬路の電力遅延プロファイルなどがスループットにどのような影響を及ぼすかを考察している.1/8程度までパンクチャした冗長ビットを再送するようにすれば最大のスループットが得られること,フレーム長やフェージングレートが小さくなるにつれスループットが低下するもののほとんど一定であることが分かった.また,拡散率を小さくするにつれてスループットは低下するものの実効伝送レート(スループット_kbps)は増加することが分かった. In this paper, we evaluate by computer simulations the throughput performance of the turbo-coded hybrid ARQ for direct sequence code division multiple access (DS-CDMA) with antenna diversity reception and Rake combining in a frequency selective Rayleigh fading channel. The effect of a range of system parameters and propagation parameters (viz., the frame length, puncturing rate, spreading factor, number of diversity antennas, fading rate, and the power delay profile of the multipath channel (number of paths and profile shape)) is investigated. It is found that the rate compatible punctured turbo (RCPT) coded hybrid ARQ system has the highest throughput when minimum amount of redundancy bits is transmitted with each retransmission and that the throughput is almost independent of the frame length and the fading rate. It is also found that smaller spreading factor for a given chip rate gives a higher throughput in bits/sec.

  624. A Study on Optimum Weights for Multi-channel Transmit Diversity

    KATOH Akihito, KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 101 (682) 257-264 2002/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this paper, we study multi-channel transmit diversity, with multiple transmit antennas and single receive antenna, for DS-CDMA. A transit diversity we consider is to transmit the weighted and time-delayed versions of the same signal from multiple antennas. At the receiver, Rake reception is performed using a single receive antenna. The optimum antenna weights for maximizing the received SNR, thus minimizing the average bit error rate, is theoretically derived to show the optimum weight is to transmit from one antenna that have the maximum channel gain. This transmit diversity is equivalent to selection combining (SC) receive diversity. The combined effect of transmit diversity and transmit power control (TPC) is also theoretically analyzed. The BER performance with SC transmit diversity in a frequency non-selective Rayleigh fading environment is evaluated by computer simulations.

  625. Analysis of OFDM-CDMA Forward Link Performance in Pure Impulsive Interference over a Frequency Selective Fading Channel

    KUDOH Eisuke, ADACHI Fumiyuki

    Technical report of IEICE. RCS 101 (682) 225-232 2002/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    In this paper, the bit error rate (BER) of the OFDM-CDMA down-link in the presence of pure impulsive interference with antenna diversity in a frequency selective fading channel is theoretically derived and is numerically obtained by a Monte-Carlo integration method. Minimum mean square error combining (MMSEC) and orthogonal restoring combining (ORC) are considered for frequency-domain equalization. It is found that the error floor due to impulsive interference becomes larger as the area of impulse increases, and that the antenna diversity reception does not help to reduce the error floor. Almost no difference is observed between the MMSEC and the ORC with respect to the impulsive interference influence on the BER performance. Furthermore, the impulsive interference impacts ODFM-CDMA transmission similarly to DS-CDMA transmission.

  626. アウターループを用いる送信電力制御の解析

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 2002 2002

    ISSN: 1349-1369

  627. Performance Evaluation of DS-CDMA Adaptive Narrowband Interference Canceller in a Rayleigh Fading Channel.

    関裕太, 高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 102 (391(SST2002 26-34)) 2002

    ISSN: 0913-5685

  628. The Optimum Weights of Multi-Antenna Transmit and Receive Diversity for DS-CDMA.

    加藤昭仁, 工藤栄亮, 安達文幸

    電子情報通信学会技術研究報告 102 (392(SST2002 35-49)) 2002

    ISSN: 0913-5685

  629. Turbo Decoding Performance with Iterative Channel Estimation for Multi-channel Reception in Fast Rayleigh Fading.

    木村良平, GARG D, 安達文幸

    電子情報通信学会技術研究報告 101 (682(RCS2001 244-283)) 2002

    ISSN: 0913-5685

  630. Adaptive prediction Iterative Channel Estimation for Combined Antenna Diversity and Coherent Rake Reception of Mulipath-faded DSSS Signals.

    高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 101 (682(RCS2001 244-283)) 2002

    ISSN: 0913-5685

  631. Space-Time Code-Multiplexing Transmit Diversity.

    高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 102 (465(RCS2002 192-206)) 2002

    ISSN: 0913-5685

  632. 5GHz帯室内伝搬における変動分布について

    佐々木範雄, 工藤貴之, 花海丞, 清野賢一, 安達文幸

    電子情報通信学会大会講演論文集 2002 2002

    ISSN: 1349-1369

  633. Chip Interleaved Multicode DS-CDMA with MMSEC.

    板垣竹識, 佐尾智基, GARG D, 安達文幸

    電子情報通信学会技術研究報告 102 (391(SST2002 26-34)) 2002

    ISSN: 0913-5685

  634. 繰り返しチャネル推定を用いるOFDM受信の特性

    高岡辰輔, 安達文幸

    電子情報通信学会大会講演論文集 2002 2002

    ISSN: 1349-1369

  635. インパルス性干渉がDS-CDMAに及ぼす影響の考察

    工藤栄亮, 安達文幸

    電子情報通信学会大会講演論文集 2002 2002

    ISSN: 1349-1369

  636. Pilot-aided Frequency-domain Equalization with Threshold Detection for OFDM-CDMA Down Link Transmissions in A Frequency Selective Fading Channel.

    佐尾智基, 安達文幸

    電子情報通信学会技術研究報告 101 (682(RCS2001 244-283)) 2002

    ISSN: 0913-5685

  637. OFDM-CDMA下り受信におけるORC,CE,MMSEおよびTD周波数等化の特性比較

    佐尾智基, 安達文幸

    電子情報通信学会大会講演論文集 2002 2002

    ISSN: 1349-1369

  638. Minimum Mean Square Error Combining for Multi-rate MC-CDMA with Antenna Diversity Reception.

    佐尾智基, 安達文幸

    電子情報通信学会技術研究報告 102 (465(RCS2002 192-206)) 2002

    ISSN: 0913-5685

  639. Effect of TPC and Rake Receiver on Uplink Link Capacity of DS-CDMA Packet Mobile Communication.

    WANG Z S, 工藤栄亮, 安達文幸

    電子情報通信学会技術研究報告 102 (392(SST2002 35-49)) 2002

    ISSN: 0913-5685

  640. Adaptive Prediction Interative Channel Estimation for OFDM Signal Reception in a Frequency Selective Fading Channel.

    高岡辰輔, 安達文幸

    電子情報通信学会技術研究報告 102 (282(RCS2002 147-165)) 2002

    ISSN: 0913-5685

  641. システマチック符号のみを判定起帰還して繰り返しチャネル推定を行うターボ復号の特性評価

    木村良平, DEEPSHIKHA G, 安達文幸

    電子情報通信学会大会講演論文集 2002 2002

    ISSN: 1349-1369

  642. マルチチャネル送信ダイバーシチにおける最適重み

    加藤昭仁, 工藤栄亮, 安達文幸

    電子情報通信学会大会講演論文集 2002 2002

    ISSN: 1349-1369

  643. EVOLVING WIRELESS COMMUNICATIONS TECHNOLOGY

    Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2002 499-500 2002

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  644. 2.4GHz帯広帯域伝送における室内電波伝搬特性

    佐々木範雄, 花海丞, 安達文幸

    電気学会通信研究会資料 CMN-01 (1-9) 2001

  645. A Study on a Future Road-Vehicle Communication System Using Millimeter-wave Radio.

    阿部紘士, 安達文幸, 小泉寿男

    電子情報通信学会技術研究報告 101 (51(SAT2001 1-7)) 2001

    ISSN: 0913-5685

  646. 電力線搬送における送電線路の雑音特性

    佐々木範雄, 花海丞, 安達文幸

    電気学会通信研究会資料 CMN-01 (15-19.21-23) 2001

  647. Iterative Decision-Directed Path Search and Channel Estimation Method for Multi-Carrier/DS-CDMA Broadband Packet Wireless Access

    ATARASHI Hiroyuki, ABETA Sadayuki, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 100 (21) 19-26 2000/04/21

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper proposes an iterative timing detection of resolved multipath components(path search)and channel estimation method for coherent Rake combining in multi-carrier(MC)/DS-CDMA broadband packet wireless access over a 100 MHz bandwidth. In the proposed method, while the initial path search and channel estimation are performed using only time-multiplexed pilot symbols, their results are refined by repeating path search and channel estimation using both pilot and decision-directed data symbols after channel decoding. Computer simulation results demonstrate that the required average received E_b/N_0 for achieving the average packet error rate(PER)=10^&lt;-2&gt; can be improved by approximately 1.2, 1.3, 2.0 and 2.1 dB for the number of sub-carriers N_c=1, 4, 8, and 16, respectively under an equal level 24-path Rayleigh fading channel with the total number of pilot symbols of 64 and the number of iterations of 1.

  648. Experiments on High Rate Data Transmission Using Fast Transmit Power Control with Outer Loop in W-CDMA Mobile Radio

    IKEDA Takehiro, HIGUCHI Kenichi, FUKUMOTO Satoru, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2000 (1) 427 2000/03/07

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  649. Field experiments on coherent adaptive antenna array diversity using fast transmit power control for W-CDMA mobile radio reverse link

    TANAKA Shinya, HARADA Atsushi, IHARA Taisuke, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2000 (1) 430 2000/03/07

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  650. Performance of adaptive array antenna diversity receiver with fast beam tracking when fast TPC is used for W-CDMA mobile radio

    Ihara T, Tanaka S, Harada A, Sawahashi M, Adachi F

    Proceedings of the IEICE General Conference 2000 (1) 2000/03/07

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  651. Iterative Decision-Directed Path Search and Channel Estimation for Multi-Carrier/DS-CDMA Broadband Radio Packet Transmission

    Atarashi Hiroyuki, Abeta Sadayuki, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 2000 (1) 743-744 2000/03/07

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  652. Laboratory experiments on beam tracking performance of adaptive antenna array diversity receiver in W-CDMA reverse link.

    井原泰介, 田中晋也, 原田篤, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (567(SAT99 130-143)) 2000

    ISSN: 0913-5685

  653. Laboratory Experiments on Coherent Rake Receiver Using Fast Transmit Power Control in Broadband DS-CDMA Mobile Radio.

    池田武弘, 大川耕一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (639(RCS99 238-253)) 27-32 2000

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    This paper experimentally evaluated the bit error rate (BER) performance of single-carrier broadband DS-CDMA (B-CDMA) access scheme using a 100 MHz bandwidth applying SIR measurement-based fast transmission power control (TPC) by laboratory experiments using a multipath fading simulator.The achievable information bit rate is 20.36(2.5)Mbps when the spreading factor is SF=4(32). Experimental results demonstrated that by applying fast TPC, the required average transmit E_b/N_0 at the average BER of 10^<-6> with antenna diversity can be reduced by approximately 7 dB compared to that in the case without fast TPC. It was also shown that the average BER of 10^<-6>of 20.36(2.5)Mbps transmission was achieved at the average transmit E_b/N_0 of approximately 6.7(5.0)dB with antenna diversity when L=2 and f_D=20 Hz. Moreover, 2.5 Mbps transmission with average BER below 10^<-6> can be achieved with antenna diversity in multipath fading channels up to 12 paths, which indicates that the Rake path diversity and fast TPC effectively works in a broadb and propagation channels.

  654. A Study on an Road-Vehicle Communication System for Future ITS Using Millimeter-wave Radio.

    阿部紘士, 安達文幸, 小泉寿男

    情報処理学会研究報告 2000 (112(MBL-15 ITS-3)) 2000

    ISSN: 0919-6072

  655. HTSを用いたエレクトロニクスデバイスの開発 4-2 移動ワイヤレス通信技術の展望と超伝導デバイスへの期待

    安達文幸

    超電導応用研究会シンポジウム講演論文集 7 2000

  656. W-CDMA上りリンクにおけるセル間サイトダイバーシチの屋外実験結果

    森本彰人, 福元暁, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 2000 2000

    ISSN: 1349-1369

  657. Experiments on Fast Transmit Power Control using Outer Loop with Variable Step Size in W-CDMA

    HIGUCHI Kenichi, MORIMOTO Akihito, FUKUMOTO Satoru, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2000 426 2000

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  658. Field Experiments on Inter-Cell Site Diversity in W-CDMA Forward Link

    FUKUMOTO Satoru, HIGUCHI Kenichi, MORIMOTO Akihito, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2000 (1) 429 2000

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  659. The performance of adaptive antenna array transmit diversity in the presence of the interfering signals beyond the degrees of freedom

    HARADA Atsushi, TANAKA Shinya, IHARA Taisuke, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 2000 (1) 432 2000

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  660. 2-Step Compensation Method of BS Transmit Power for Site Diversity between Cells in Transmit Power-controlled W-CDMA Forward Link

    FUKUMOTO Satoru, HIGUCHI Kenichi, MORIMOTO Akihito, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 99 (470) 69-76 1999/11/26

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper proposed the 2-step compensation method of base station (BS) transmit power for site diversity between cells in transmit power-controlled W-CDMA forward link. In the first step, the standard transmit power of each BS was compensated by the feedback control information from mobile station (MS), which is generated based on the received signal power measurement of each BS at MS. In the second step, the instantaneous transmit power of BS was controlled according to the transmit power control command bit from MS introducing the forgetting factor using the standard transmit power. It was found from the experimental results that the total BS average transmit E_b/N_0 can be almost minimized when the forgetting factor is about 0.8 and 0.6 for 2-and 3-cell site diversity case, and the total BS average transmit E_b/N_0 for the average BER of 10^&lt;-36gt; for 2-cell site diversity can be decreased by about 0.8 dB compared to the without site diversity case.

  661. Field Experiments on Adaptive Antenna Array Transmit Diversity in W-CDMA Forward Link

    HARADA Atsushi, TANAKA Shinya, IHARA Taisuke, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 99 (470) 115-121 1999/11/26

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper presents the field experimental results on adaptive antenna array transmit diversity (AAA-TD) with 4 antenna elements in W-CDMA forward link. In our scheme, the transmit antenna weights are generated by calibrating the receiver antenna weights generated in pilot symbol-assisted coherent adaptive antenna array diversity receiver (CAAA-DR) in reverse link. In the experiment, the calibration of the phase/amplitude variations of RF transceivers was performed. Field experimental results showed that the generated beam pattern can track the movement or AOA or the mobile station (MS) moving at the average vehicular speed of 30 km/h in 2-MS environment (1-interfering MS) and that the average BER performance of the MS in forward link can be improved compared to 1-antenna transmitter ; average BER improves by two orders of magnitude at the average received signal power of -85 dBm with the average transmitted SIR = -15 dB.

  662. A study of RF Transmitter/Receiver Calibration in Adaptive Antenna Array Transmit Diversity for W-CDMA Forward Link

    HARADA Atsushi, TANAKA Shinya, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 99 (272) 103-110 1999/08/27

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper experimentally evaluated the effect of RF calibration which compensates the phase/amplitude variation of RF transmitter/receiver in adaptive antenna array (AAA) transmit diversity in W-CDMA forward link. It was found from the experimental results that RF calibration using common frequency synthesizer between AAA transceivers and a calibration transceiver showed no significant improvements in received SIR and BER performance at mobile station (MS) compared to the independent synthesizer method and that the good performance was obtained by measuring the phase/amplitude variation of RF transceivers at one point level. It was also shown that by AAA transmit diversity using RF calibration with common frequency synthesizer and phase/amplitude measurement at one point level, the required transmit SIR for the average BER of 10^&lt;-3&gt; can be decreased by about 12(14)dB compared to 1-antenna transmitter with (without) antenna diversity reception for 4-antenna element.

  663. Performance of Forward Link Selection Transmit Diversity with Reverse Link Transmit Power Control for W-CDMA Mobile Radio

    Fukumoto Satoru, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 1999 (1) 247 1999/08/16

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  664. Experiments on adaptive antenna array transmit diversity for W-CDMA mobile radio forward link

    HARADA Atsushi, TANAKA Shinya, IHARA Taisuke, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the Society Conference of IEICE 1999 (1) 248 1999/08/16

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  665. Performance of pilot symbol-assisted coherent multistage interference canceller with recursive channel estimation in multicell environments

    HIGUCHI Kenichi, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the Society Conference of IEICE 1999 (1) 249 1999/08/16

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  666. Laboratory experimental results on adaptive antenna array diversity reception for the number of receiver branch in W-CDMA reverse link

    IHARA T, TANAKA S, TENG Chu Ern, SAWAHASHI M, ADACHI F

    Technical report of IEICE. RCS 99 (220) 37-42 1999/07/23

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper presents the laboratory experimental results of the pilot symbol-assisted coherent adaptive antenna array diversity (PSA-CAAAD) for the reverse link in W-CDMA with the number of array element and the number of interference user used as parameter. In the case of the number of interference souses are less than the number of antenna array, the experimental result shows that the average BER decreases considerably with increasing the number of array elements when the angle of desire user and interference user are close to each other. It is also clarified that the improvement in the average BER is significantly large with the number of array elements when the number of interference is beyond the number of array element. This is because the freedom in generating beam pattern is increased with the number of array. The experimental results shows that the average BER can be reduced by 2 order of magnitude for 6-antenna and 7-user case compared to 2-antenna and 7-user case at the average SIR of-15 dB.

  667. Experiments on Coherent Rake Receiver with Reverse/Forward link Transmit Power Control for W-CDMA Mobile Radio

    FUKUMOTO Satoru, OKAWA Koichi, HIGUCHI Kenichi, SAWAHASHI Mamoru, ADACHI Fumuyuki

    Technical report of IEICE. RCS 99 (141) 7-12 1999/06/24

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper presents the laboratory and field experimental results of the coherent Rake receiver in reverse link when fast adaptive transmit power control (TPC) is applied both for reverse/forward links in W-CDMA mobile radio. From the laboratory experiments in 2-path Rayleigh fading cannel with equal average received power, it was verifield that the required transmitted E_b/N_O for obtaining the average BER of 10^&lt;-3&gt; in reverse link increases by about 0.5-1.0 dB when the forward link fast adaptive TPC was applied compared to the case when the received signal power at mobile station was high enough, that is, TPC command bit is received correctly. Field experimental results also showed that burst error occurs when the measured E_b/I_O after Rake combining decreases from the target value due to the TPC command bit error in forward link and that required transmitted level for obtaining the average BER of 10^&lt;-3&gt; in reverse link increases by about 0.5-1.0 dB when the forward link fast adaptive TPC was applied.

  668. Field Experiments on Orthogonal Multi-Spreading Factor Forward Link for W-CDMA Mobile Radio

    OKAWA Koichi, FUKUMOTO Satoru, HIGUCHI Kenichi, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 99 (141) 13-18 1999/06/24

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper presents the laboratory and field experimental results of BER performance using orthogonal multispreading factor (SF) transmission in W-CDMA forward link. From the laboratory experiments using multi-path fading simulator, when interfering user of symbol rate of 1024 ksps using orthogonal multi-SF code exists, the almost same BER performance was achieved as that when interfering user using 16 orthogonal channels with symbol rate of 64 ksps exists (total symbol rate is same), this implying the orthogonality in the same path is maintained in the case both with/without fast transmit power control. Field experimental results also demonstrated that orthogonal multi-SF transmission between different SF channnels using tree-structured orthogonal spreading codes was achieved in practical environments and that the average received signal power required for achieving average BER of 10^&lt;-3&gt; can be reduced by about 2-3 dB compared to the case with non-orthogonal codes with antenna diversity reception.

  669. Experiments on 2-Mbps Data Transmission Using Adaptive Transmit Power Control in 5-MHz W-CDMA Mobile Radio Air Interface

    OKAWA Koichi, FUKUMOTO Satoru, SAWAHASHI Mamoru, ADACHI Fumiyuki

    IEICE technical report 99 (85) 1-6 1999/05/24

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper presents the laboratory experimental results of 2-Mbps data transmission in 5-MHz bandwidth (chip rate of 4.096 Mcps) using fast adaptive transmit power control (TPC) based on SIR measurement in frequency selective multipath fading environments for a wideband direct sequence code division multiple access (W-CDMA) mobile radio link. In the experimental system, the very low SF of 4 is used, therefore the influence of multi-path interference (MPI) is large. The experimental results show that the application of antenna diversity is indispensable to mitigate the influence of MPI. When the number of multipaths is 2, the average BER of l0^&lt;-6&gt; can be achieved at the target E_b/I_o of approximately 4 dB by applying fast adaptive TPC, 2-branch antenna diversity and 2-finger/antenna Rake diversity.

  670. Experiments on Path Search of Rake Combining for Spreading Factor in W-CDMA Mobile Radio

    FUKUMOTO Satoru, OKAWA Koichi, HIGUCHI Kenichi, SAWAHASHI Mamoru, ADACHI Fumuyuki

    IEICE technical report 99 (85) 7-14 1999/05/24

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    Performance of Rake receiver using path search algorithm with path selection threshold was investigated for various spreading factor (SF) channel in laboratory experiments. From the experimental results, it is clarified that the required target E_b/I_o and transmit power of a mobile station (MS) were reduced by setting a threshold to an appropriate value. Although the optimum threshold value differed by SF and the number of pilot symbols in a slot, the MS transmit power with threshold of 6dB against the noise level (including multipath interference) was reduced by about 0.5-1.0 dB compared to the case when the threshold was not used. It was also shown that the optimum averaging period of power delay profile and the optimum number of slots to be coherently averaged are about 50-100 ms and 4 slots respectively.

  671. Experiments on Adaptive Antenna Array Diversity Reception Using Sectored Antenna with beam width of 120 (90) degree for W-CDMA Mobile Radio Reverse Link

    IHARA T, YAMAGUCHI R, TANAKA S, SAWAHASHI M, ADACHI F

    IEICE technical report 99 (85) 31-36 1999/05/24

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper investigates the performance of pilot symbol-assisted coherent adaptive antenna array diversity (PSA-CAAD) of 4-antenna array, which using sector antenna with beam width of 90 and 120 degree, in W-CDMA reverse link for 2-user and 5-user cases in anechoic chamber. The experimental result shows that the PSA-CAAD has the large effect of improving the average BER compared to the case of sector antenna reception, because the null beam can be generate toward to the direction of interference user. But it also shows that its enhancement is degraded when the direction angle of the desired user is close to that of the interference user and when it approaches the edge of 3 dB element beam width (a drop of 2 order of BER has been degraded). Furthermore, it also clarified that the PSA-CAAD with 120 degree beam width element can reduce 2 order of the average BER within the direction of desired signal range of ±60 degree relative to the case of using sector antenna under 5-user environment, nevertheless the number of the interference users are beyond the number of antenna branches.

  672. B-5-17 The effect of the channel coding in OFDM/DS-CDMA packet transmission.

    Abeta Sadayuki, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 1999 (1) 368 1999/03/08

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  673. B-5-18 Coherent detection with pilot symbol in OFDM/DS-CDMA packet radio access

    Hanada Yukiko, Abeta Sadayuki, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 1999 (1) 369 1999/03/08

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  674. B-5-138 Field Experiments on the Pilot Symbol-assisted Coherent Multistage Interference Canceller with Recursive Channel Estimation for W-CDMA

    Higuchi Kenichi, Okawa Koichi, Andoh Hidehiro, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 1999 (1) 489 1999/03/08

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  675. B-5-139 Experiments on the adaptive antenna array diversity for DS-CDMA mobile radio reverse link

    TANAKA Shinya, HARADA Atsushi, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1999 (1) 490 1999/03/08

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  676. B-5-160 Performance of Down Link Transmit Diversity for W-CDMA Mobile Radio

    Fukumoto Satoru, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 1999 (1) 511 1999/03/08

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  677. Evaluation of the outage probability of the forward link DS-CDMA cellular system with fast TPC based on SIR

    LYU Dugin, SUDA Hirohito, ADACHI Fumiyuki

    Technical report of IEICE. RCS 98 (601) 83-90 1999/02/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    The outage probability of a forward link DS-CDMA cellular system with fast TPC based on SIR is investigated by using Monte Carlo simulation. Two kinds of channel models: random delay resolvable path model and tapped delay line model are considered. The effect of the number of resolvable paths, the number of RAKE fingers, the multipath intensity profile, and the maximum limit of transmit power is investigated. The outage probabillty of a system with SIR based TPC is compared to that without TPC and the link capacity of the forward link is compared with that of the reverse link.

  678. Experiments on 2-Mbps Data Transmission Using 5-MHz Bandwidth in W-CDMA Mobile Radio Air Interface.

    大川耕一, 安藤英浩, 福元暁, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (20(RCS99 7-14)) 1999

    ISSN: 0913-5685

  679. Field Experiments on 2-Mbps Data transmission in 5-MHz W-CDMA Mobile Radio Air Interface

    OKAWA Koichi, FUKUMOTO Satoru, HIGUCHI Kenichi, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the Society Conference of IEICE 237 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

  680. Field Experiments on 3-step Fast Cell Search Method in W-CDMA Mobile Radio.

    樋口健一, 花田由紀子, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (355(AP99 124-143)) 1999

    ISSN: 0913-5685

  681. Experiments on 3-step Fast Cell Search Method in W-CDMA Mobile Radio.

    樋口健一, 花田由紀子, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (272(RCS99 87-102)) 1999

    ISSN: 0913-5685

  682. Experiments on 3-step Fast Cell Search Method using TSTD in W-CDMA Mobile Radio.

    樋口健一, 花田由紀子, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (470(RCS99 141-157)) 99-105 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    This paper experimentally evaluated the cell search time performance of 3-step cell search method using primary and secondary search channels (PSC ,SSC), when the time-space transmit diversity (TSTD) was applied to SCs in W-CDMA mobile radio. Field experimental results showed that the cell search time at the detection probability of 90 % when the TSTD was used to SCs can be decreased by approximately 100 msec compared to the case with single antenna transmission when the number of DTCH was 10 and the transmit power ratio of common pilot channel (CPICH) to DTCH was -3 dB with the average received E_b/N_0 for DTCH of 7 dB at the average vehicular speed of 5 km/h.

  683. Performance Evaluation of Fast Beam Tracking in Adaptive Antenna Array Diversity Receiver in W-CDMA Reverse Link.

    井原泰介, TENG C E, 田中晋也, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (355(AP99 124-143)) 1999

    ISSN: 0913-5685

  684. Experiments on Reverse Link Site Diversity between Sectors in W-CDMA Mobile Radio.

    森本彰人, 福元暁, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (470(RCS99 141-157)) 77-82 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    This paper evaluated the effects of the reverse link site diversity between sectors in laboratory experiments for W-CDMA mobile radio. We found from the experimental results that the required MS average transmit E_b/N_0 for the average BER of 10^<-3> using site diversity between 2-sectors can be decreased by about 1.5 dB compared to the case using site diversity between 2-cell site when the path loss difference of 2 BS and MS, Δ_<12>=0 dB. We verified the effect of outer loop for controlling the target E_b/I_0 and showed that the required MS average transmit E_b/N_0 for the average FER of 10^<-2> is decreased by approximately 2.0 dB compared to no site diversity case when the outer loop control was applied.

  685. Performance of fast cell search algorithm in idle mode for W-CDMA mobile radio.

    花田由紀子, 樋田健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (272(RCS99 87-102)) 1999

    ISSN: 0913-5685

  686. Performance comparisons of coherent SC/DS-CDMA, MC/DS-CDMA on up-link broadband radio packet transmission.

    新博行, 安部田貞行, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (355(AP99 124-143)) 1999

    ISSN: 0913-5685

  687. Cell search performance in idle mode of mobile station for W-CDMA mobile radio.

    花田由紀子, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (139(CS99 33-47)) 1999

    ISSN: 0913-5685

  688. The effect of multiple base station reception on W-CDMA employing turbo codes.

    藤原淳, 須田博人, 安達文幸

    電子情報通信学会技術研究報告 98 (598(AP98 173-191)) 77-82 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this paper, turbo codes and site-diversity are applied to W-CDMA on reverse link, and the performance is investigated as a function of combining period of site-diversity. Simulation results shows the site-diversity provides the considerable gain with combining period 10ms through 80ms(maxmum Doppler frequency f_D is 80Hz). Futhermore, the performance of turbo codes with site-diversity is compared to the conventional coding scheme, concatenated codes of convolutional codes and RS codes, and it is shown that turbo codes provide the better performance than the conventional coding scheme if only Rayleigh fading or both Rayleigh fading and shadowing is assumed(f_D=80Hz). In the case with f_D 5Hz, turbo codes provides the better performance then the conventional coding scheme if both Rayleigh fading and shadowing is assumed.

  689. Field Experiments on Coherent Multistage Interference Canceller for DS-CDMA Mobile Radio.

    樋口健一, 大川耕一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (85(RCS99 15-24)) 1999

    ISSN: 0913-5685

  690. Laboratory Experiments on Coherent Adaptive Antenna Array Diversity Using Fast Transmit Power Control for W-CDMA Reverse Link.

    田中晋也, 原田篤, 井原泰介, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (139(CS99 33-47)) 1999

    ISSN: 0913-5685

  691. Laboratory Experiments on Coherent Rake Receiver in Broadband DS-CDMA Mobile Radio.

    池田武弘, 大川耕一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (355(AP99 124-143)) 1999

    ISSN: 0913-5685

  692. Field Experimental Results on Feedback Type Transmit Diversity in W-CDMA Forward Link.

    福元暁, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (470(RCS99 141-157)) 1999

    ISSN: 0913-5685

  693. Performance Evaluation of Forward Link Transmit Diversity in Wideband DS-CDMA.

    福元暁, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (20(RCS99 7-14)) 1999

    ISSN: 0913-5685

  694. Experiments on Adaptive Antenna Array Diversity for W-CDMA Mobile Radio Reverse Link.

    田中晋也, 原田篤, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (20(RCS99 7-14)) 1999

    ISSN: 0913-5685

  695. Laboratory Experiments on Adaptive Antenna Array Diversity Transmitter for W-CDMA Forward Link.

    原田篤, 田中晋也, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (85(RCS99 15-24)) 1999

    ISSN: 0913-5685

  696. Field Experimental Results on Forward Link Transmit Diversity in W-CDMA mobile Radio.

    福元暁, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (272(RCS99 87-102)) 1999

    ISSN: 0913-5685

  697. 3-step Fast Cell Search Method with Frequency Drift Compensation for W-CDMA.

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (218(SSE99 39-53)) 1999

    ISSN: 0913-5685

  698. Performance Evaluation of Forward Link Transmit Diversity in Wideband DS-CDMA.

    福元暁, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (218(SSE99 39-53)) 1999

    ISSN: 0913-5685

  699. Experiments on Forward Link Site Diversity in W-CDMA Mobile Radio.

    森本彰人, 福元暁, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (272(RCS99 87-102)) 1999

    ISSN: 0913-5685

  700. Experiments on Fast Transmit Power Control Using 2-Step Outer Loop in Reverse Link Site Diversity between Cells for W-CDMA Mobile Radio.

    樋口健一, 福元暁, 森本彰人, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (470(RCS99 141-157)) 83-90 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    This paper proposed a fast transmit power control (TPC) scheme using 2-step outer loop in reverse link site diversity between cells for W-CDMA mobile radio. The first outer loop compensates the target E_b/I_0 based on the FER measurement results before site diversity combining at each base station (BS) for tracking fast variation of propagation channel. The second pouter loop compensates the target FER before combing at each BS based on the final FER measurement after site diversity combining at radio network controller. The experimental results using fading simulator showed that measured FER after site diversity combining between 2-cell was controlled to be equal to the prescribed target value of 1 % over the wide range of f_D from 5 to 800Hz, while the measured FER berore combining varies from 4 to 20 %.

  701. Field Experiments on Fast Cell Search Algorithm Using Scrambling Code Masking with Other-Cell Interference for W-CDMA.

    樋口健一, 大川耕一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (20(RCS99 7-14)) 1999

    ISSN: 0913-5685

  702. Experiments on High Rate Data Transmission Using Turbo/Convolutional Coding in W-CDMA Mobile Radio.

    池田武弘, 樋口健一, 福元暁, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (470(RCS99 141-157)) 61-68 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    This paper experimentally evaluated the BER performance of high rate data transmission such as 64 and 384 kbps using turbo/convolutional coding in multipath fading channels for W-CDMA mobile radio, It was found from the laboratory experiments using fading simulator that the required average transmit E_b/N_0 for the average BER of 10^<-6> using turbo coding is decreased by approximately 1.0-1.8 dB and 1.8-2.0 dB for 64 and 384 kbps compared to the case using convolutional coding when the channel interleaving length of 80 msec for G_D=5-200Hz. Filed experimental results showed that the required average transmit power for the average BER of 10^<-6> using turbo coding is decreased by approximately 1,5 dB and 2.5-3.0 dB compared to convolutional coding for of 64 and 384 kbps data transmission without antenna diversity and that it is decreased by approximately 0.5 dB with antenna diversity reception.

  703. Performance comparisons of coherent SC/DS-CDMA, MC/DS-CDMA, MC-CDMA on down-link broadband radio packet transmission.

    安部田貞行, 新博行, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (355(AP99 124-143)) 1999

    ISSN: 0913-5685

  704. Field Experiments on Coherent Adaptive Antenna Array Diversity Receiver for W-CDMA Reverse Link.

    田中晋也, 原田篤, 井原泰介, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (355(AP99 124-143)) 1999

    ISSN: 0913-5685

  705. Laboratory Experiments on Coherent Multistage Interference Canceller Using Interference Rejection Weight Control for DS-CDMA Mobile Radio.

    樋口健一, 大川耕一, SHIRLEY T E L, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (139(CS99 33-47)) 1999

    ISSN: 0913-5685

  706. Performance of Coherent Adaptive Antenna Array Diversity Receiver Using the Common Antenna Weights for Rake Combined Paths for W-CDMA Reverse Link.

    田中晋也, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (272(RCS99 87-102)) 1999

    ISSN: 0913-5685

  707. Experiments on Inter-Cell Site Diversity in W-CDMA Reverse Link.

    森本彰人, 福元暁, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (355(AP99 124-143)) 428 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

  708. Experiments on Target Cell Search Time during Active Mode Using 3-step Cell Search Method in W-CDMA Mobile Radio.

    花田由紀子, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 99 (470(RCS99 141-157)) 91-97 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    This paper presents the experimental results on the target cell search time performance during active mode using 3-step cell search method with primary and secondary search channels (PSC, SSC) in W-CDMA mobile radio. Field experiments was conducted in 3 sectors ; mobile station (MS) connecting to the one sector searched the target sector from the other two sectors. Field experimental results showed that the cell search time at the detection probability of 90% is below 1.5 sec (600 msec) when the path loss of the target 2 sector candidates were 3 and 6 dB lower than the original sector and the transmit power ratio of common pilot channel (CPICH) to DTCH was 0 (3) dB with the average received E_b/N_0 for DTCH above 7 (4) dB at the average vehicular speed of 30 km/h.

  709. B-5-190 Decoding-complexity Reduction on Turbo-CRC Concatenated Code in W-CDMA Mobile Radio

    Shibatani Akira, Suda Hirohito, Adachi Fumiyuki

    Proceedings of the IEICE General Conference 1999 (1) 541 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  710. DS-CDMA適応アンテナアレイ送信ダイバーシチにおける無線部回路キャリブレーションの効果

    原田篤, 田中晋也, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1999 1999

    ISSN: 1349-1369

  711. B-5-146 Adaptive Transmit Power Control with Outer Loop for W-CDMA Using Turbo Codes

    KAWAI Hiroyuki, SUDA Hirohito, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1999 (1) 497 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  712. Performance of coherent adaptive antenna array diversity using decision-directed data after decoding for W-CDMA mobile radio reverse link

    TANAKA Shinya, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the Society Conference of IEICE 1999 279 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  713. 5-MHz W-CDMAにおける2-Mbps伝送の屋外伝送実験特性

    大川耕一, 福元暁, 樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1999 1999

    ISSN: 1349-1369

  714. B-5-161 Site-Diversity Effect on W-CDMA Employing Turbo Codes

    FUJIWARA Atsushi, SUDA Hirohito, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1999 (1) 512 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  715. Cell search performance using path diversity in idle mode of mobile station for W-CDMA mobile radio

    Hanada Yukiko, Higuchi Kenichi, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 1999 (1) 258 1999

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  716. B-5-137 Experiments of 2 Mbps data transmission using 5 MHz bandwidth in W-CDMA

    OKAWA Koichi, HIGUCHI Kenichi, ANDOH Hidehiro, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1999 488 1999

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  717. B-5-165 Effect of the calibration of phase and amplitude variation of the transmitter/receiver RF circuits for DS-CDMA adaptive antenna array transmitter diversity

    HARAD Atsushi, TANAKA Shinya, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 516 1999

    Publisher: 一般社団法人電子情報通信学会

  718. The effect of path-frequency diversity in broadband OFDM/DS-CDMA packet transmission.

    Abeta Sadayuki, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 1999 268 1999

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  719. Performance on chip synchronization and packet transmission in W-CDMA random access

    HANADA Yukiko, ABETA Sadayuki, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 98 (358) 49-54 1998/10/22

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    The performances of coherent block demodulation for W-CDMA packet transmission is described. The power delay profile is measured using the all pilot symbols within the packet and some continuous pilot blocks are coherently accumulated. Computer simulation results and laboratory experiments confirm that coherent summation over the 2 pilot blocks are effective for suppressing the influence of the noise and fading variation when the pilot symbols inserted every 0.625ms.It is also clarified the FER performance is degraded by only 0.5dB from the ideal case.

  720. Field experimental results on high rate data transmission with concatenated channel coding using fast transmit power control in W-CDMA

    ANDOH H, HIGUCHI K, OKAWA K, SAWAHASHI M, ADACHI F

    Technical report of IEICE. RCS 98 (273) 19-24 1998/09/18

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    The BER performance of the high rate data transmission using fast transmit power control(TPC) and concatenated channel coding in W-CDMA was investigated by laboratory and field experiments. It was shown from the filed experimental results that the required Eb/I0 at the average BER of 10^&lt;-6&gt; using the concatenated coding can be decreased by about 0.5 dB compared to the convolutional coding only case with the inner(outer)interleaving size of 20(100)msec when fast TPC was applied. It was also shown that 64 kbps and 384 kbps high quality datatransmission below the average BER of 10^&lt;-6&gt; was achieved at the target Eb/I0 = about 5.0-6.0 dB by applying the 4-finger RAKE diversity and 2-branch antenna diversity.

  721. Experiments on Adaptive Transmit Power Control with Outer Loop for W-CDMA Using Concatenated Channel Coding

    OKAWA K, HIGUCHI K, ANDOH H, SAWAHASHI M, ADACHI F

    Technical report of IEICE. RCS 98 (273) 25-31 1998/09/18

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    In this paper, we present an outer loop transmit power control(TPC) method for high bit rate data transmission using concatenated channel coding in W-CDMA mobile radio, and investigate the performance by laboratory experiments. In this outer loop TPC, the target SIR is controlled by keeping the frame error rate(FER_&lt;in&gt;)after inner decoding constant to achieve constant received quality after outer decoding irrespective of the channel conditions. From the experimental results using hardware fading simulator, it is clarified that FER_&lt;out&gt; after outer decoding can be controlled to be almost constant from slow to fast fading up to 480 Hz, and BER_&lt;out&gt; after outer decoding can also be controlled to be within the fluctuation of one-digit(in this case, the target SIR is controlled within the range of 4.5 dB). Moreover, it is also shown that the target SIR can be minimized when the step size of inner loop and outer loop are Δ_&lt;in&gt;=+/-1.0 dB and Δ_&lt;out&gt;=+/-0.5 dB, respectively, and as a result, that multiple access interference(MAI) can be minimized.

  722. Experiments on User Ranking of Pilot Symbol-Assisted Coherent Multistage Interference Canceller for DS-CDMA Mobile Radio

    Sawahashi Mamoru, Andoh Hidehiro, Higuchi Kenichi, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 1998 (1) 302 1998/09/07

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  723. Experimental performance of pilot symbol-assisted coherent adaptive antenna array diversity

    Tanaka Shinya, Harada Atsushi, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 1998 (1) 460 1998/09/07

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  724. Experiments on Pilot Symbol-Assisted Coherent Multistage Interference Canceller Using Adaptive Transmit Power Control for W-CDMA Mobile Radio

    SAWAHASH M, ANDOH H, HIGUCHI K, ADACHI F

    Technical report of IEICE. RCS 98 (218) 19-26 1998/07/25

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    A3-stage coherent multistage interference canceller(COMSIC)for DS-CDMA mobile radio was implemented and its performance using adaptive transmit power control(TPC)in frequency selective multipath fading is investigated by laboratory experiments.The implemented interference canceller applied pilot symbol-assisted channel estimation for data decision and replica generation of multiple access interference(MAI)with the speading factor of 16. In the proposed scheme, the SIR measurement is conducted at the matched filter (MF)output and the target SIR is compensated by feed-backing the frame error rate at the last stage of COMSIC in order to reduce the TPC delay.The laboratory experiment demonstrated that with(without)antenna diversity, the required Eb/NO of COMSIC at the average BER of 10^-3 can be reduced by about 0.5(1.0)dB and also the transmit power of mobile station is decreased by about 2.0(3.0)dB compared to MF receiver when the number of users K is 8. It is also shown that outer loop is applied, almost the best performance is obtained when the step size of inner(outer)is±1.0(±0.5)dB and that the transmit power of COMSIC can be reduced by about 1.0dB compared to MF receiver when K=6.

  725. Mutual Coupling Problem for Adaptive Array Antenna

    GE JunXiang, SUDA Hirohito, SAWAHASHI Mamoru, ADACHI Fumiyuki, EBINE Yoshio

    IEICE technical report. Microwaves 98 (197) 81-85 1998/07/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    It is important to research the mutual coupling among adaptive array antenna elements.The mutual coupling can change the weight function of an adaptive array antenna, and the null-deep and the direction of beam pattern for the antenna array, which weaken the ability in anti-interference of a mobile communication sistem.We discuss these problems produced by the mutual coupling in this paper.

  726. Experiments on Coherent Adaptive Array Antenna Diversity for DS-CDMA Reverse Link

    TANAKA S, HIGUCHI K, SAWAHASHI M, ADACHI F

    Technical report of IEICE. RCS 98 (160) 19-24 1998/06/30

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper investigates the performance of pilot symbol-assisted coherent adaptive array antenna diversity(PSA-CAAD)for W-CDMA in laboratory experiments. The experimental results showed that the null can be accurately generated toward the direction of the interfering users when the number of desired signal plus interfering users is smaller than the number of antenna elements for 2 and 4 antenna elements. It was also experimentally demonstrated that the PSA-CAAD is very effective in suppressing the interference from the high bit rate users who transmit high power compared to the space diversity.

  727. Experiments on Pilot Symbol-Assisted Coherent Multistage Interference Canceller for W-CDMA Mobile Radio

    SAWAHASH M, ANDOH H, HIGUCHI K, ADACHI F

    Technical report of IEICE. RCS 98 (89) 25-32 1998/05/29

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    A 3-stage coherent multistage interference canceller for DS-CDMA mobile radio was implemented and its performance in frequency selective multipath fading is experimentally evaluated by using a multipath fading simulator. The implemented interference canceller applied pilot symbol-assisted channel estimation for data decision and replica generation of multiple access interference (MAI). The laboratory experiment demonstrated that, as is expected, the coherent multistage interference canceller can reduce the MAI satisfactory in multipath fading environment and thus, improving the bit error rate (BER) performance under multi-user environment. The average BER of 10^&lt;-3&gt; was achieved at the average Eb/N0=about 14dB when the number of active users K=16(K/SF=100%; SF is spreading factor) with 2-branch antenna diversity.

  728. Experiments on Pilot Symbol-Assisted Coherent RAKE Receiver Using Adaptive Transmit Power Control for W-CDMA Mobile Radio

    ANDOH H, HIGUCHI K, OKAWA K, SAWAHASHI M, ADACHI F

    Technical report of IEICE. RCS 98 (89) 33-40 1998/05/29

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    Performance of RAKE receiver using SIR based adaptive transmit power control(TPC)using time-multiplexed pilot symbols was investigated in laboratory and filed experiments. The effect of number of symbols for SIR measurement and TPC delay were evaluated. From the laboratory experiments, the number of symbols for SIR measurement, the relation between TPC delay and BER performance, and the effect of the antenna diversity was clarified. Furthermore, we evaluated the average BER performance and the transmit power variation of mobile terminal in field experiments. It was shown from the field experimental results that by applying the 2-branch antenna diversity, the required Eb/NO at the average BER of 10-3 can be decreased by about 2.5dB and that the 50% value of the cumulative distribution of the mobile terminal transmit power cane be reduced by about 3dB.

  729. Experiments on Adaptive Transmit Power Control using Outer Loop for W-CDMA Mobile Radio

    HIGUCHI K, ANDOH H, OKAWA K, SAWAHASHI M, ADACHI F

    Technical report of IEICE. RCS 98 (21) 51-57 1998/04/24

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    Performance of the adaptive transmit power control using outer loop for wideband DS-CDMA is investigated in laboratory experiments. In the outer loop, the target SIR is controlled for maintaining the frame error rate (FER) based on the CRC measurement results should be required constant value. From the experimental results, it is clarified that the FER and BER can be controlled to be almost constant from slow to fast fading up to 320Hz when the averaging period of FER is above 1000 frames. It is also shown that when the inner loop step size and outer loop step size are 1.0dB and 0.5dB, respectively, the target SIR can be the minimum value, and that the tracking performance against fast fading is improved by changing the TPC delay from one slot delay to two slots delay.

  730. The Performance of Channel Estimation method using Adaptive Weighted Multi-Symbol Averaging(WMSA)with Pilot Channel in DS-CDMA

    ABETA Sadayuki, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 98 (21) 67-74 1998/04/24

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper propse the adaptive weighting factor control scheme for weighted multi-symbol averaging (WMSA) channel estimating Techniques using time-multiplexed pilot and parallel pilot under double-spike Rayleigh channel and Vehicular B fading channel. The proposed scheme estimates the fading pitch with calculating the inner product of pilot symbols. Computer simulation confirms that the proposed scheme improves the BER performance in every fading pitch.

  731. Experimental performance of coherent RAKE receiver using weighted multi-slot averaging pilot symbol-assisted channel estimation for DS-CDMA

    ANDOH Hidehiro, HIGUCHI Kenichi, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1998 (1) 713-714 1998/03/06

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  732. Experimental performance of adaptive transmit power control using outer loop for wideband-CDMA

    HIGUCHI Kenichi, ANDOH Hidehiro, NAKANO Etsuhiro, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1998 (1) 456 1998/03/06

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  733. Experimental performance of orthogonal multi-rate transmission in W-CDMA forward link

    OKAWA Koichi, HIGUCHI Kenichi, ANDOH Hidehiro, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1998 (1) 457 1998/03/06

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  734. Experimental performance of concatenated channel coding for wideband DS-CDMA

    DOHI Tomohiro, HIGUCHI Kenichi, ANDOH Hidehiro, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1998 (1) 458 1998/03/06

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  735. Experimental performance of pilot symbol-assisted coherent multistage interference canceller with recursive channel estimation for DS-CDMA

    SAWAHASHI Mamoru, ANDOH Hidehiro, HIGUCHI Kenichi, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1998 (1) 459 1998/03/06

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  736. Performance of matched filter-based pilot-assisted RAKE receiver using adaptively controlled weights for W-CDMA

    FUKUMOTO Satoru, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1998 (1) 463 1998/03/06

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  737. Field Experiments on Pilot Symbol-Assisted Coherent RAKE Receiver using Adaptive Transmit Power Control in Multi-user Environments for W-CDMA Mobile Radio.

    安藤英浩, 樋口健一, 大川耕一, 福元暁, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (218(RCS98 72-78)) 1998

    ISSN: 0913-5685

  738. Experimental Evaluation on Coherent Adaptive Array Antenna Diversity for DS-CDMA Reverse Link.

    田中晋也, 原田篤, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (273(RCS98 89-99)) 1998

    ISSN: 0913-5685

  739. Experiments on Orthogonal Multi-Spreading Factor Forward Link for W-CDMA Mobile Radio.

    大川耕一, 安藤英浩, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (160(RCS98 50-56)) 1998

    ISSN: 0913-5685

  740. Experimental performance of pilot symbol-assisted coherent adaptive antenna array diversity.

    田中晋也, 原田篤, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1998 1998

    ISSN: 1349-1369

  741. Impact of radio bandwidth expansion on link capasity of DS-CDMA mobile communication

    HIROHASHI Kentaro, SUDA Hirohito, ADACHI Fumiyuki, YAMAMOTO Heiichi

    ITE Technical Report 22.68 43-48 1998

    Publisher: The Institute of Image Information and Television Engineers

    DOI: 10.11485/itetr.22.68.0_43  

    ISSN: 1342-6893

    eISSN: 2424-1970

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    We evalute impact of spreading bandwidth expansion on DS-CDMA reverse link by computer simulation with data rate and the number of the propagation paths as parameters. The evaluted bandwidths of spreading are 1.25,5,10,20MHz. As spreading bandwidth increases, the capasity improves at least from 15% to 22%. There are two reasons, one is a propagation paths increasing effect and the other is received interference power smoothing effect. It was also shown that the reverse link capasity is improved by spreading bandwidth expansion under non-continuous transmit user condition.

  742. Impact of radio bandwidth expansion on link capasity of DS-CDMA mobile communication.

    広橋健太郎, 須田博人, 安達文幸, 山本平一

    電子情報通信学会技術研究報告 98 (435(RCS98 151-167)) 43-48 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    We evaluate impact of spreading bandwidth expansion on DS-CDMA reverse link by computer simulation with data rate and the number of the propagation paths as parameters. The evaluated bandwidths of spreading are 1.25, 5, 10, 20MHz. As spreading bandwidth increases, the capacity improves at least from 15% to 22%. There are two reasons, one is a propagation paths increasing effect and the other is received interference power smoothing effect. It was also shown that the reverse link capasity is improved by spreading bandwidth expansion under non-continuous transmit user condition.

  743. Experiments on Fast Cell Search Algorithm Using Long Code Masking for W-CDMA.

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (160(RCS98 50-56)) 1998

    ISSN: 0913-5685

  744. Field Experiments on Fast Cell Search Algorithm Using Long Code Masking for W-CDMA.

    樋口健一, 原田篤, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (218(RCS98 72-78)) 1998

    ISSN: 0913-5685

  745. Coherent block demodulation of W-CDMA packet in frequency selective multipath channels.

    安部田貞行, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (217(RCS98 57-71)) 1998

    ISSN: 0913-5685

  746. Multiple Interleaving Methods for the W-CDMA System.

    渋谷彰, 須田博人, 安達文幸

    電子情報通信学会技術研究報告 97 (544(AP97 175-187)) 23-30 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    We propose Multiple interleaving (MIL) method for W-CDMA mobile radio channel. The proposal method can be applied to W-CDMA system for channel-interleaver of the mobile radio channel and for encoding-interleaver of Turbo code. The performance of this method is evaluated by computer simulation. In case of applying MIL method to both channel-interleaver and Turbo code, required E_b/N_0 for BER=10^<-6> is less .4dB than the use of each conventional inteleaver. Furthermore, in case of applying MIL method to Turbo code, simulation results show not only that BER at error floor of Turbo code is at least 0.1 times than the use of conventional inteleaver but also that the decoding-iterations can be reduced for same performance as conventional interleaver.

  747. A Study of Wide-band CDMA Link Capacity.

    須田博人, 安達文幸

    電子情報通信学会技術研究報告 97 (485(DSP97 147-167)) 17-22 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    We investigate link capacity increasing effects by expanding radio band width of CDMA system using computer simulations. Number of the radio propagation paths, the normalized variance of shadow fading, the correlation coefficient of shadow fading between the different base stations, ahd the path loss exponent are the main parameters in this investigations. There are two reasons for increasing the link capacity by radio band width expansion. One is increasing the number of the radio propagation paths, and the other is received interference power smoothing effects. By employing Wide-band CDMA, where band width is 4 times wider than that of Narrow-band CDMA, the link capacities increase in number of the maximum users about 20-300% comparing to the narrow band CDMA.

  748. Experiments on High Rate Multi-code Transmission Using Cocatenated Channel Coding for W-CDMA Mobile Radio.

    安藤英浩, 樋口健一, 大川耕一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (160(RCS98 50-56)) 1998

    ISSN: 0913-5685

  749. Experiments on Path Search Performance of Coherent RAKE Receiver for W-CDMA Mobile Radio.

    福元暁, 大川耕一, 安藤英浩, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (88(CS98 24-36)) 1998

    ISSN: 0913-5685

  750. Field Experiments on Path Search Performance of Coherent RAKE Receiver in Multiuser Environments for W-CDMA Mobile Radio.

    福元暁, 大川耕一, 安藤英浩, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (218(RCS98 72-78)) 1998

    ISSN: 0913-5685

  751. Next Generation Mobile Radio Access for Multimedia Transmission: W-CDMA.

    佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 98 (452(SST98 41-48)) 1998

    ISSN: 0913-5685

  752. Performance Improvements of MIL Combined with Turbo Coded W-CDMA.

    渋谷彰, 須田博人, 安達文幸

    電子情報通信学会大会講演論文集 1998 (1) 307 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  753. Experimental performance of coherent RAKE receiver for long delayed multipath in W-CDMA.

    福元暁, 安藤英浩, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1998 (1) 299 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  754. Applications of spread spectrum technique to IMT2000 systems.

    安達文幸

    電子情報通信学会大会講演論文集 1998 515-516 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  755. Impact of carrier leak on orthogonal multi-spreading factor transmission in W-CDMA.

    大川耕一, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1998 (1) 301 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  756. Multiple Interleaving Methods for the W-CDMA System.

    渋谷彰, 須田博人, 安達文幸

    電子情報通信学会大会講演論文集 1998 488 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  757. Effects of applying APQ to Turbo coded W-CDMA System.

    須田博人, 渋谷彰, 藤原淳, 安達文幸

    電子情報通信学会大会講演論文集 1998 (1) 308 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  758. Performance of W-CDMA employing Punctured Turbo Codes.

    藤原淳, 須田博人, 安達文幸

    電子情報通信学会大会講演論文集 1998 (1) 347 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  759. Experiments on Fast Cell Search Algorithm using Long Code Masking with Frequency Drift Compensation.

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1998 (1) 300 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  760. Wideband DS-CDMA(W-CDMA) Mobile Radio Access.

    佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1998 275-276 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  761. FER Performance of W-CDMA employing Trubo Codes.

    藤原淳, 須田博人, 安達文幸

    電子情報通信学会大会講演論文集 1998 487 1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  762. Performance of pilot symbol-assisted RAKE receiver in fast-to-slow speed environment for W-CDMA mobile radio

    Andoh Hidehiro, Fukumoto Satoru, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 1998 298 1998

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  763. Experiments on Path Detection Probability for Packet Transmission in W-CDMA Reverse Link

    Hanada Yukiko, Abeta Sadayuki, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 1998 304 1998

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

  764. The Performance of Channel Estimation method using Weighted Multi-Symbol Averaging(WMSA)with Pilot Chanel in DS-CDMA

    ABETA Sadayuki, ANDO Hidehiro, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 97 (399) 43-50 1997/11/26

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    This paper evaluates the performance of Weighted Multi-Symbol Averaging (WMSA) channel estimating techniques using time-multiplexed pilot and parallel pilot under double-spike Rayleigh channel and Vehicular B fading channel. WMSA method average the received weighted pilot data during some slots to improve the tolerance for fading variation, MAI, MPI and thermal noise. Computer simulation confirms that both systems have almost same performance under same condition.

  765. Performance of Pilot-Symbols Assisted Matched filter RAKE Receiver with Two-Stage Multipath Selection Threshold for Wideband DS-CDMA

    FUKUMOTO Satoru, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 97 (322) 43-48 1997/10/16

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

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    We have proposed pilot-symbols assisted matched filter based RAKE receiver with two-stage mutipath selection threshold in order to accurately select multipaths with higher signal-to-interference plus noise ratio (SINR) for RAKE combining for wideband DS-CDMA. It is shown that the proposed path-search with two-stage multipath selection threshold is effective in selecting the multipaths with higher SINR, thereby improving the BER performance of the RAKE receiver. The simulation results also show that the optimum threshold values can be fixed regardless of adaptive transmit power control, anntena diversity, multiple access interference distribution, and delay profile model.

  766. 2 Mbps data transmission experiments over coherent DS-CDMA mobile radio link

    OKAWA Koichi, OKUMURA Yukihiko, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 97 (267) 43-48 1997/09/25

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    Experimental results of 2 Mbps data transmission experiment over coherent DS-CDMA mobile radio link using 20 MHz bandwidth are presented. The combined use of concatenated channel coding, RAKE path diversity and antenna diversity reception is applied to improve the transmission performance under frequency selective multipath fading environments. A possibility of realizing high quality 2 Mbps transmission under a real propagation environment is confirmed by laboratory and field experiments.

  767. Performance of Pilot Symbols-Assisted Coherent RAKE Receiver Using Weighted Multi-Slot Averaging for DS-CDMA Mobile Radio

    ANDOH H, SAWAHASHI M, ADACHI F

    Technical report of IEICE. RCS 97 (194) 63-68 1997/07/25

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    We have proposed time-multiplexed pilot symbol-assisted channel estimation scheme using weighted multi-slot averaging (WMSA) in order to accurately estimate the fading channels for DS-CDMA mobile radio. In this paper, we evaluated the bit error rate performance using fast closed loop transmit power control (TPC) based on measured signal-to-interference plus noise ratio (SINR). It is demonstrated by computer simulations that the required signal energy per bit-to-background noise power spectrum density ratio (Eb/N0) using the proposed WMSA channel estimation can be reduced by about 0.8 dB compared to that using simple linear interpolation. The BER performance achievable by the time multiplexed pilot symbols based channel estimation is also compared with that of the parallel pilot channel based channel estimation.

  768. The influence of spreading codes on DS-CDMA orthogonai multi-rate forward link using tree-structured code assignment

    OKAWA Koichi, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1997 (1) 444 1997/03/06

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

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    我々は先に, DS-CDMAにおいて拡散率の異なるコードチャネル間の直交性を保証し可変拡散率伝送により直交マルチレート下りリンクを実現する階層的拡散符号割当法(Tree-structured multi-rate code assignment : TCA)を提案した. 本報告では, TCAにより拡散符号割当を行う場合の組合せががビット誤り率(BER)特性に与える影響について, 平均BERの分布特性により評価する.

  769. Performance of Turbo codes applied to W-CDMA.

    藤原淳, 須田博人, 安達文幸

    電子情報通信学会技術研究報告 97 (425(SANE97 99-108)) 19-24 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this paper, Turbo codes are applied to W-CDMA as a channel coding on mobile radio communication system, and the performance and decoding complexity of Turbo codes compared to convolutional code are described. Simulation results show that decoding gain of more than 1dB is achieved by the use of Turbo code with the same or less complexity of decoding than convolutional code. The performance on various transmission environment is also evaluated and considerable gain is achieved on each environment. Furthermore, Turbo codes are applied to multi-code transmission system and, results show that decoding gain of Turbo codes increases with the increase of the number of multi-code channels.

  770. Blind Variable Rate Data Transmission Using Tree-structured Orthogonal code sequence in DS-CDMA.

    奥村幸彦, 安達文幸

    電子情報通信学会技術研究報告 97 (320(AP97 98-113)) 7-13 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    A variable rate data transmission and blind rate detection scheme is proposed for coherent DS-CDMA mobile radio. The data to be transmitted is first transformed into a QPSK symbol sequence, then multiplied by the rate-matched repetition code of "1, -1", and finally spread over a wide bandwidth. At the receiver, the received signal is despread by a matched filter. The despread signal sample sequence is then multiplied by a repetition code of detected rate to recover the original transmitted QPSK symbol sequence. The probability of rate detection error for a 4-rate case and the frame error rate performance are evaluated by computer simulations in a 2-path Rayleigh fading channel.

  771. Fast Cell Search Algorithm using Long Code Masking in DS-CDMA Asynchronous Cellular System.

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 96 (477(DSP96 108-120)) 57-63 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    In this paper, an improved cell search algorithm using long code masking is proposed in DS-CDMA asynchronous cellular system. In the proposed algorithm, the long code group as well as received long code timing is estimated by detecting the correlations in the long code masked symbols. Because the number of long code candidate in the long code identification process of the formerly proposed algorithm is reduced, the faster cell search can be achieved. The computer simulation results demonstrate that the cell search time using proposed algorithm can be reduced to 20% of the formerly proposed one.

  772. Experiments on wideband coherent DS-CDMA.

    土肥智弘, 奥村幸彦, 安達文幸

    電子情報通信学会技術研究報告 97 (31(RCS97 1-6)) 17-24 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    The experimental results such as transmit power vs. chip rate (spreading bandwidth), BER performance vs. chip rate of wideband coherent DS-CDMA (W-CDMA) are clarified. The transmit power of the wideband is smaller than the power of narrowband since the ability of path resolution increases, the variation of received power after RAKE combiner is small, and the probability of fading to the lower power level decreases. BER performance is improved by 3dB by antenna diversity.

  773. Effects of SIR-based transmit power control for coherent DS-CDMA mobile communications.

    清尾俊輔, 奥村幸彦, 土肥智弘, 安達文幸

    電子情報通信学会技術研究報告 96 (533(MW96 189-205)) 43-48 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    DS-CDMA has been extensively investigated as a promising application to the future mobile radio access. Transmit power control is an essential scheme for CDMA in overcoming the near-far problem. In this paper, SIR-based transmit power control scheme using pilot symbols is applied for the reverse-link radio channel. Effects on the required E_b/N_0, power control error and channel capacity caused by the power control step, interval of desired power measurement, power control delay, and the number of paths are clarified with computer simulations.

  774. Multi-rate Wideband DS-CDMA Radio Access For Next Generation Mobile Radio Systems.

    安達文幸, 佐和橋衛

    電子情報通信学会技術研究報告 97 (264(SST97 42-55)) 33-38 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    The design concept of multi-rate W-CDMA mobile radio access that employs asynchronous cell site operation, orthogonal multi-rate forward link using tree structured orthogonal multi-supreading factor (SF) sequences, and coherent Rake combining with channel estimation using time-multiplexed pilot symbols, is described. Contimuous system deployment from outdoors to indoors is possible due to the adoption of asynchronous cell site operation. The use of orthogonal multi-SF sequences offers very high flexibility in supporting the co-existance of various wideband data services and voice/voiceband data services without losing orthogonality among different users. Interference cancellation and adaptive antenna array diversity techniques that can improve significantly radio link performance are also described. Field experiments conducted near Tokyo are also presented. It is shown that widening the spreading bandwidth can reduce the mobile transmit power significantly. Furthermore, 2Mbps data was successfully transmitted and received over a real fading channel while a mobile station was driven.

  775. Performance of SIR-Based Transmit Power Control using Outer Loop in the Forward Link of DS-CDMA.

    菊池文雄, 安達文幸, 中野悦宏, 大野公士

    電子情報通信学会技術研究報告 96 (526(EMCJ96 67-83)) 113-118 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    The forward link capacity of DS-CDMA cellular system with the SIR-based transmit power control (TPC) using outer loop which control the target SIR in order to satisfy the required frame error rate is evaluated by computer simulation. It is demonstrated that the capacity with the TPC is about 2 times greater than that without TPC.

  776. A study on new transmit power control method using Markov model for DS-CDMA.

    佐々木新一, 須田博人, 安達文幸, 山本平一

    電子情報通信学会技術研究報告 97 (399(RCS97 156-169)) 37-42 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    We propose a closed loop transmit power control method using Markov state transitions for tracking a large variation of received signal strength. Number of the states, conditions of the state transition, and delays of the power control loop are major parameters of the method and the power control error reduction effects are evaluated by computer simulations. We clarified that transmit power error was degraded by increasing the number of the Markov states.

  777. Effect of Wide-band Coherent DS-CDMA.

    土肥智弘, 奥村幸彦, 安達文幸

    電子情報通信学会大会講演論文集 1997 (Sogo Pt 2) 399 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  778. Interference Reduction by Transmit Power Control in the Forward Link of DS-CDMA.

    菊池文雄, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1997 (Sogo Pt 2) 467 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  779. Measured Transmission Performance of Wide-band Coherent DS-CDMA.

    奥村幸彦, 土肥智弘, 安達文幸

    電子情報通信学会大会講演論文集 1997 (Sogo Pt 2) 404 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  780. Performance of matched filter based pilot-assisted RAKE combiner for wideband DS-CDMA.

    福元暁, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1997 (Sogo Pt 2) 403 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  781. Fast Cell Search Algorithm using Long Code Masking with Frequency Drift Compensation.

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1997 (Sogo Pt 2) 402 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  782. Field Experiments on DS-CDMA 2Mbps Transmission.

    大川耕一, 奥村幸彦, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1997 (1) 298 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  783. Blind Rate Detection using Repetition Code in DS-CDMA Variable Rate Data Transmission.

    奥村幸彦, 安達文幸

    電子情報通信学会大会講演論文集 1997 (1) 296 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  784. The effect of reducing the interference from high bit rate transmission users using Coherent Adaptive Array Diversity in DS-CDMA.

    田中晋也, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1997 258 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  785. Effects of number of resolved multipath on the capacity of power controlled DS-CDMA reverse link.

    土肥智弘, 清尾俊輔, 安達文幸

    電子情報通信学会大会講演論文集 1997 268 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  786. 3-Step Fast Cell Search Algorithm using Path Diversity in DS-CDMA Mobile Radio.

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1997 254 1997

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  787. Performance of matched filter based pilot-assisted RAKE receiver with two-stage multipath selection threshold for DS-CDMA

    FUKUMOTO Satoru, Sawahashi Mamoru, Adachi Fumiyuki

    Proceedings of the Society Conference of IEICE 275 1997

    Publisher: 一般社団法人電子情報通信学会

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    DS-CDMAでは, 遅延時間の異なるマルチパスを合成するRAKEを用いることによりフェージング環境下における伝送特性を改善することができる. 我々は先に, 時間多重されたパイロットシンボルを用いて生成した遅延プロファイルから合成パスをしきい値選択するマッチトフィルタRAKEについて評価した. 本稿では, より効果的に合成パスを選択するために遅延プロファイルに対して2段階のしきい値判定を行うマッチトフィルタRAKEを提案しその効果を評価する.

  788. Orthogonal Multi-Rate Forward Link Using Tree-Structured Generation Method of Orthogonal Spreading Codes for Coherent DS-CDMA

    OKAWA Koichi, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Technical report of IEICE. RCS 96 (354) 31-36 1996/11/14

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 0913-5685

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    In DS-CDMA system, variable rate data transmission can be realized either by using several orthogonal spreading code-channels in parallel (multicode transmission) or by changing the spreading factor of a code-channel according to the transmission rate (variable spreading factor transmission). Orthogonal multicode transmission method can be directly applied to the forward link. However, its drawback is that multiple RAKE combiners are required, thereby increasing the mobile receiver complexity. On the other hand, variable spreading factor transmission method requires a single RAKE receiver, but there has been no solution to achieve orthogonality among code-channels using different spreading factors. In this paper, we propose a tree-structured generation method of orthogonal spreading codes with different code lengths for forward link of coherent DS-CDMA and evaluate its bit error rate (BER) performance under multipath Rayleigh fading and multi-user environments by computer simulation.

  789. Performance of 2Mbps Multicode Transmission on DS-CDMA

    OKAWA Koichi, ANDOH Hidehiro, SAWAHASHl Mamoru, ADACHl Fumiyuki

    Proceedings of the Society Conference of IEICE 1996 (1) 394 1996/09/18

    Publisher: 一般社団法人電子情報通信学会

    ISSN: 1349-1369

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    DS-CDMAでは,複数の拡散コードチャネルを並列に用いることにより多元レートの情報をフレキシブルに伝送することができる.本報告では,60コードチャネル多重を用いる2Mbps(&amp;cong;1.92Mbps)伝送について,室内伝送実験により誤り訂正(FEC),RAKEおよびスペースダイバーシチ(SD)の効果を定量的に検証したので結果を報告する.

  790. Low Power Consumption Matched Filter LSI for Wideband DS-CDMA.

    佐和橋衛, 安達文幸, SHOU G, ZHOU C

    電子情報通信学会技術研究報告 95 (490(RCS95 112-124)) 57-62 1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

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    We have developed the low power consumption and high sampling frequency matched filter LSI for wideband DS-CDMA celullar mobile radio. This matched filter LSI is based on ADF(analog digital filter) techniques. The amplitude degradation of -3dB at 25MHz samplin9 frequency and power consumption of 11OmW with Vdd=3V were achieved. The power consumption, frequency characteristics of correlation signal, linearity performance, and BER performance were experimentally evaluated.

  791. High Bit Rate Data Transmission using Multicarrier 16QAM Modulation.

    佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 96 (29(RCS96 1-7)) 21-27 1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    96-multicarrier 16QAM transmitter and diversity receiver for 3.072 Mbps data transmission are described. Pilot symbol aided (PSA) coherent detection is applied. A laboratory experiment demonstrates that an irrducible bit error rate (BER) of 10<-3> can be achieved at the rms delay spread τrms=6.3μs under frequency selective Rayleigh fading when two-branch maximal-ratio combining (MRC) diversity is used. It is also experimrntally demonstrated that the cancatinating coding using convolutional coding and RS coding is effective for impruving the BER Performance against frequency selective fading.

  792. Two-Stage Rapid Cell Search Scheme in DS-CDMA Asynchronous Cellular System using Long Code.

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 96 (213(RCS96 66-84)) 51-56 1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    A rapid cell search scheme was formerly proposed in DS-CDMA asynchronous cellular system using long code. In the proposed scheme, the long code masked symbols spread by only common short code are periodically used between information data symbols spread by both long code and short code. In this paper, the cell search time performance of proposed scheme is evaluated as a parameter of the number of the masked symbols and that of averaging frames in long code timing detection stage and the transmit power per channel of base station. Then required transmit power of the control channel in view of cell search is calculated. Finally, it is shown that the imperfection of orthogonality of traffic channels due to the masked symbols is negligibly small.

  793. Two-Stage Rapid Long Code Acquisition Scheme in DS-CDMA Asynchronous Cellular System.

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 96 (48(CS96 15-23)) 27-32 1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    A rapid long code acquisition scheme is proposed in DS-CDMA asynchronous cellular system. In the proposed scheme, speading code timing is first detected by detecting the short code correlation where long code is masked. And in second stage, long code is identified by using code timing detected in first stage. It is shown that the proposed scheme can achieve the rapid code acquisition of several seconds by computer simulation.

  794. Variable Rate Data Transmissions on Single Code-channel in DS-CDMA.

    奥村幸彦, 大野公士, 安達文幸

    電子情報通信学会技術研究報告 95 (539(EMCJ95 97-112)) 55-60 1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    Coherent multicode DS-CDMA is proposed for the next generation mobile cellular radio access. Two-layered spreading code allocation, pilot symbol assisted coherent RAKE combining, traffic-adaptive transmit power control, and orthogonal multicode transmission are employed. In this paper, cyclic redundancy check (CRC) code and rate-info aided variable rate data transmissions are proposed to realize variable voice and data transmitted on a single code-channel (code-channels are distinguished by short spreading codes) in coherent multicode DS-CDMA. The frame error rate (FER) performance under multipath Rayleigh fading environments is evaluated by computer simulations. The variable rate transmission characteristics, focused on rate-info detection schemes and bit-interleaving structures, are described.

  795. Experiments on coherent multicode DS-CDMA.

    土肥智弘, 奥村幸彦, 東明洋, 大野公士, 安達文幸

    電子情報通信学会技術研究報告 96 (29(RCS96 1-7)) 1-6 1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    DS-CDMA has been extensively investigated as a promising application to the future mobile radio access. Recently, we proposed coherent multicode DS-CDMA (CM-CDMA) that applies 2-layered spreading code assignment, pilot symbol-aided coherent detection, traffic-adaptive transmit power control and multicode transmission. This paper describes a CM-CDMA test-bed system and experimental results. It is confirmed that pilot symbol-aided coherent RAKE can reduce the required signal energy per bit-to-interference plus background noise spectrum density ratio (Eb/Io). Also shown is that by using both RAKE combining and SIR-based power control the transmit power of mobile stations can be significantly reduced. The performance of the multicode transmission using orthogonal Gold code is also clarified.

  796. Performance of Multicode Transmission on Coherent Mutlicode DS-CDMA.

    大川耕一, 東明洋, 大野公士, 安達文幸

    電子情報通信学会技術研究報告 96 (48(CS96 15-23)) 39-44 1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    In coherent multicode DS-CDMA system, high bit rate data transmission is realized by multiplexing several spreading code-channels in parallel (multicode transmission). In this paper, the influences of spreading code and multipath in multicode transmission are evaluated by computer simulations. It is shown that performance degradation according to increasing the number of code-channels is suppressed by employing an orthogonal gold code. Also, the effectiveness of multicode transmission is experimentally verified.

  797. Blind Variable Rate Detection Using Viterbi Decoding Path-metric in Coherent DS-CDMA.

    奥村幸彦, 安達文幸

    電子情報通信学会技術研究報告 96 (354(RCS96 99-113)) 17-23 1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    Variable-rate data transmission schemes suitable for coherent direct sequence code division multiple access (DS-CDMA) mobile radio are described. Two data rate detection schemes are considered: blind detection and rate indicator (RI) assisted detection. At the transmitter, the variable-rate user data to be transmitted is block-encoded for cyclic redundancy check (CRC) and then convolutionally encoded. Blind detection is incorporated into the process of Viterbi decoding of the convolutional-coded data. For RI assisted detection, the transmitted data is recovered based on received RI. The CRC is used in both rate detection schemes to find whether the recovered user data is correct or not. The average frame error rate (FER) and average false detection rate (FDR) of the two rate detection schemes are evaluated by computer simulations under multipath Rayleigh fading environments and the results are compared.

  798. Rate-Info Aided Variable Rate Data Transmissions in DS-CDMA.

    奥村幸彦, 大野公士, 安達文幸

    電子情報通信学会大会講演論文集 1996 (Sogo Pt 2) 388 1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  799. Performance of Two-Stage Cell Search Scheme in DS-CDMA Long Code System.

    樋口健一, 佐和橋衛, 安達文幸

    電子情報通信学会大会講演論文集 1996 (Society B1) 1996

    ISSN: 1349-1369

  800. Blind Rate Detection of Variable Rate Data Transmission in DS-CDMA.

    奥村幸彦, 安達文幸

    電子情報通信学会大会講演論文集 1996 (Society B1) 1996

    ISSN: 1349-1369

  801. Effects of SINR Based Transmit Power Control in the Presence of Non-uniform Traffic Distribution

    DOHI Tomohiro, SAWAHASHI Mamoru, ADACHI Fumiyuki

    Proceedings of the IEICE General Conference 1995 (Sogo Pt 2) 422 1995

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  802. Decision-Directed Coherent Delay Locked Loop for DS-CDMA.

    佐和橋衛, 安達文幸

    電子情報通信学会技術研究報告 94 (502(RCS94 148-153)) 1995

    ISSN: 0913-5685

  803. A Transmission Experiment on Coherent Multicode DS-CDMA Mobile Radio Access.

    奥村幸彦, 東明洋, 土肥智弘, 大野公士, 安達文幸

    電子情報通信学会技術研究報告 95 (310(AP95 53-62)) 13-18 1995

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    DS-CDMA has been extensively investigated as a promising application to the next generation mobile radio access. Recently, we proposed coherent multicode DS-CDMA that has number of features: 2-layered spreading code assignment, traffic-adaptive transmit power control, pilot-symbol-aided coherent detection, and multicode transmission. An experimental CDMA system was built for a series of laboratory and field tests. In this paper, the experiment results, focused on the effects of coherent RAKE combining, SLR-based transmit power control, and multicode transmission using orthogonal gold sequences are reported.

  804. Effects of space/path diversity for reverse-link transmit power and cell capacity of a power-controlled cellular DS-CDMA system.

    大野公士, 安達文幸

    電子情報通信学会技術研究報告 94 (502(RCS94 148-153)) 1995

    ISSN: 0913-5685

  805. Coherent Multicode DS-CDMA Mobile Radio Access For Next Generation System.

    安達文幸, 大野公士, 佐和橋衛, 東明洋

    電子情報通信学会技術研究報告 95 (310(AP95 53-62)) 7-12 1995

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    DS-CDMA has been extensively investigated as a promissing application to the future mobile radio access. This paper proposes a coherent multicode DS-CDMA which has number of features:2-layered spreading code assignment, traffic-adaptive transmission power control, pilot-symbol-aided coherent reverse link, and multicode transmission. Its design and transmission performance, focused on the reverse link, are described. It is shown in this paper that a combination of 2-layered spreading code and traffic-adaptive power control provides an operation equivalent to dynamic channel assignment in TDMA/FDMA systems. Computer simulation results of reverse link transmission point out that for reducing transmit power, the spreading bandwidth should be wide enough to resolve at least two paths and if the spreading bandwidth is too narrow, then a space diversity should be used.

  806. Reverse link capacity of DS-CDMA cellular systems on various propagation characteristics.

    中野悦宏, 大野公士, 安達文幸

    電子情報通信学会大会講演論文集 1995 (Sogo Pt 2) 416 1995

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  807. Mobile Multi-Media Network.

    貝山明, 安達文幸

    電子情報通信学会大会講演論文集 1994 (Shuki Pt 3) 575-576 1994

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  808. Capacity and required Eb/No of cellular DS/CDMA system.

    安達文幸, 大野公士

    電子情報通信学会大会講演論文集 1994 (Shuki Pt 2) 298 1994

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 1349-1369

  809. Decision Feedback Differential Detection of Differentially Encoded 16APSK Signals.

    安達文幸, 佐和橋衛

    電子情報通信学会技術研究報告 93 (79(RCS93 1-11)) 7-14 1993

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN: 0913-5685

    More details Close

    Improved differential detection called DF-DD, based on feeding back past decision results, is presented for differentially encoded amplitude/phase shift keying (DAPSK). A suboptimal decision is derived. Taking into account the error propagation effect, the bit error rate (BER) of 16DAPSK is theoretically analyzed and the BER performance is compared with those of 16DPSK and 16QAM. The computer simulation results are also presented.

  810. Fast Frequency Hopping Using Digital Signal Processing and Its Performance.

    佐和橋衛, 安達文幸, 大野公士

    電子情報通信学会技術研究報告 92 (411(RCS92 99-115)) 1993

    ISSN: 0913-5685

  811. Effect of Postdetection Maximal Ratio Combining Diversity in TDMA Mobile Radio.

    伊倉雅治, 大野公士, 安達文幸

    電子情報通信学会大会講演論文集 1993 (Shunki Pt 2) 1993

    ISSN: 1349-1369

  812. Effect of baseband processing carrier frequency drift compensation on cochannel interference performance in digital mobile radio.

    伊倉雅治, 大野公士, 安達文幸, 河村克也

    電子情報通信学会大会講演論文集 1992 (Shunki Pt 2) 1992

    ISSN: 1349-1369

  813. Postdetection selection diversity with unequal branch power compensation.

    大野公士, 河村克也, 安達文幸

    電子情報通信学会技術研究報告 92 (342(RCS92 84-98)) 1992

    ISSN: 0913-5685

  814. Hardware techniques on Digital Mobile Communication. System and Control.

    安達文幸

    エレクトロニクス 37 (5) 1992

    ISSN: 0421-3513

  815. Postdetection phase combining diversity for differential phase detection of π/4 shifted QDPSK signals.

    伊倉雅治, 安達文幸, 大野公士

    電子情報通信学会技術研究報告 92 (138(RCS92 37-54)) 1992

    ISSN: 0913-5685

  816. Performance of Postdetection Maximal-Ratio Combining(MRC) Diversity Reception/Concatenated Coding Scheme in Digital Land Mobile Radio.

    河村克也, 伊倉雅治, 大野公士, 安達文幸

    電子情報通信学会大会講演論文集 1992 (Shunki Pt 2) 1992

    ISSN: 1349-1369

  817. BER performance of differentially detected 16 Star QAM under Rayleigh Fading.

    佐和橋衛, 大野公士, 安達文幸

    電子情報通信学会大会講演論文集 1992 (Shuki Pt 2) 1992

    ISSN: 1349-1369

  818. Postdetection Selection Diversity Reception with Unequal Branch Signal Power Compensation.

    河村克也, 大野公士, 安達文幸

    電子情報通信学会大会講演論文集 1992 (Shuki Pt 2) 1992

    ISSN: 1349-1369

  819. Performance of postdetection weighted combining(PWC) diversity reception for Π/4 shift QPSK mobile radio.

    大野公士, 小山博, 安達文幸

    電子情報通信学会全国大会講演論文集 1991 (Spring Pt 2) 1991

  820. Baseband feedforward frequency drift compensation for QPSK land mobile radio.

    伊倉雅治, 大野公士, 安達文幸

    電子情報通信学会全国大会講演論文集 1991 (Spring Pt 2) 1991

  821. Postdetection diversity reception of QDPSK signals in land mobile radio channels.

    大野公士, 安達文幸

    電子情報通信学会論文誌 B-2 73 (11) 1990

    ISSN: 0915-1885

  822. Decision feedback frequency drift equalizer(DF-FDE) for QPSK with differential detection in land mobile radio.

    伊倉雅治, 大野公士, 安達文幸

    電子情報通信学会全国大会講演論文集 1990 (Spring Pt.2) 1990

  823. Transition responce and ramp time for TDMA burst signal transmission.

    伊倉雅治, 大野公士, 安達文幸

    電子情報通信学会全国大会講演論文集 1990 (Autumn Pt 2) 1990

  824. Considerations on radio channel structure for digital mobile radio.

    安達文幸, 上林真司, 大野公士, 大井哲雄

    電子情報通信学会全国大会講演論文集 1989 (Spring Pt.2) 1989

  825. Field experiments on QPSK signal transmissions in mobile radio.

    大野公士, 小山博, 安達文幸

    電子情報通信学会全国大会講演論文集 1989 (Spring Pt.2) 1989

  826. Effect of block forward error correction on QPSK signal transmissions in mobile radio.

    北川真清, 大野公士, 安達文幸

    電子情報通信学会全国大会講演論文集 1989 (Spring Pt.2) 1989

  827. Differential detection of burst QPSK signals for mobile radio.

    大野公士, 安達文幸

    電子情報通信学会全国大会講演論文集 1989 (Spring Pt.2) 1989

  828. Performance evaluation of carrier phase controlled-antenna hopping(CPC-AH) in digital mobile radio.

    広池彰, 安達文幸, 中嶋信生

    電子情報通信学会技術研究報告 89 (251(RCS89 32-41)) 1989

    ISSN: 0913-5685

  829. Effects of concatenated block FEC codes with short length on QDPSK burst signal transmissions in mobile radio.

    北川真清, 大野公士, 安達文幸

    電子情報通信学会全国大会講演論文集 1989 (Autumn Pt.2) 1989

  830. Initial phase reset type clock recovery (IPR-CR).

    大野公士, 小山博, 安達文幸

    電子情報通信学会全国大会講演論文集 1989 (Autumn Pt.2) 1989

  831. Postdetection weighted combining(PWC) diversity using received signal envelope for QDPSK digital mobile radio.

    大野公士, 安達文幸

    電子情報通信学会全国大会講演論文集 1989 (Autumn Pt.2) 1989

  832. Postdetection selection diversity effects in QDPSK digital mobile radio.

    安達文幸, 大野公士, 小山博

    電子情報通信学会全国大会講演論文集 1989 (Autumn Pt.2) 1989

  833. Digital cellular mobile radio system and signal transmission technologies.

    安達文幸

    電子情報通信学会技術研究報告 89 (324(IT89 68-71)) 1989

    ISSN: 0913-5685

  834. Effects of majority voting in digital mobile radio.

    伊藤正悟, 安達文幸

    電子情報通信学会全国大会講演論文集 1988 (Pt. B-1) 1988

  835. Error rate performance of half-bit offset decision frequency detection of differentially encoded GMSK signals.

    大野公士, 小山博, 安達文幸

    電子情報通信学会全国大会講演論文集 1988 (Pt. B-1) 1988

  836. Performance of burst frame synchronisation in fading mobile radio channels.

    小山博, 大野公士, 安達文幸

    電子情報通信学会全国大会講演論文集 1988 (Autumn Pt. B-1) 1988

  837. Performance analysis of ICMA/CD multiple-access for digital mobile radio.

    安達文幸, 大野公士, 北川真清

    電子情報通信学会全国大会講演論文集 1988 (Pt. B-1) 1988

  838. Postdetection diversity for digital mobile radio.

    安達文幸, 大野公士, 小山博

    電子情報通信学会技術研究報告 88 (192) 1988

    ISSN: 0913-5685

  839. Frame syncronization codes for burst mobile radio channels.

    北川真清, 大野公士, 安達文幸

    電子情報通信学会全国大会講演論文集 1988 (Autumn Pt. B-1) 1988

  840. Facsimile signal transmission in digital mobile radio.

    伊藤正悟, 三木俊雄, 安達文幸

    電子情報通信学会技術研究報告 87 (35) 1987

    ISSN: 0913-5685

  841. Time diversity ARQ in mobile radio communications.

    大野公士, 伊藤正悟, 安達文幸

    電子情報通信学会技術研究報告 87 (35) 1987

    ISSN: 0913-5685

  842. 1200bps Subcarrier FSK transmission via analog FM mobile radio channel.

    田中喜好, 三木俊雄, 安達文幸

    電子通信学会技術研究報告 84 (225) 1984

  843. Multi-carrier transmission system in high-speed digital mobile radio channels.

    三木俊雄, 安達文幸

    電子通信学会技術研究報告 84 (225) 1984

  844. 中小都市用自動車電話無線系制御装置

    安達文幸, 歌野孝法, 金子勝哉, 村田よし利

    電気通信研究所研究実用化報告 31 (1) 1982

    ISSN: 0415-3200

  845. 中小都市用自動車電話無線回線制御方式

    歌野孝法, 安達文幸, 中川一夫, 岡坂定あつ

    電気通信研究所研究実用化報告 31 (1) 1982

    ISSN: 0415-3200

  846. 800MHz帯自動車電話方式におけるシラビック・コンパンダの適用とその効果

    服部武, 安達文幸, 新宮晴男

    電気通信研究所研究実用化報告 30 (3) 1981

    ISSN: 0415-3200

  847. 陸上移動通信におけるシラビック・コンパンダの適用効果

    安達文幸, 寺野正美和

    電子通信学会技術研究報告 78 (20) 1978

  848. ディジタルFM移動通信におけるアンテナ周期切替ダイバーシチの解析

    安達文幸

    電子通信学会技術研究報告 76 (230) 1977

  849. マルチパス・フェージング・チャネルにおける位相連続FSK遅延検波方式の符号誤り率特性

    平出賢吉, 石塚満, 安達文幸, 大谷こう一

    電子通信学会技術研究報告 77 (150) 1977

  850. ディジタルFM移動通信における変調指数を異ならせた複数波送信ダイバーシチの解析

    安達文幸

    電子通信学会技術研究報告 76 (212) 1977

  851. 移動通信におけるオフセットダイバーシチ効果に対する理論的検討

    服部武, 平出賢吉, 安達文幸

    電子通信学会技術研究報告 75 (142) 1975

  852. 移動無線用簡易切替ダイバーシチ受信

    安達文幸, 安倍和義

    電子通信学会. 通信方式研究会資料 (74-95/105) 1974

  853. 受信レベル検出を行なわない移動通信用切替ダイバーシチ方式

    安達文幸, 服部武, 安部和義, 平出賢吉, 鎌田光帯

    電子通信学会. 通信方式研究会資料 (74-119/134) 1974

  854. 800MHzにおける都市雑音の特性

    長津隆義, 岩崎比佐志, 安達文幸

    電子通信学会. 通信方式研究会資料 (73-84) 1973

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Books and Other Publications 13

  1. Mobile and Wireless Communications: Physical layer development and implementation

    Salma Ait Fares, Fumiyuki Adachi

    IN-TECH publisher 2010/01

    ISBN: 9789533070438

  2. Mobile and Wireless Communications: Network layer and circuit level design

    Salma Ait Fares, Fumiyuki Adachi

    IN-TECH publisher 2010/01

    ISBN: 9789533070421

  3. Distributed Antenna Systems: Open Architecture for Future Wireless Communication

    E. Kudoh, F. Adachi

    CRC Press 2007/06/27

  4. Multi-Carrier Spread Spectrum 2007

    F. Adachi, A. Nakajima, K. Takeda, L. Liu, H. Tomeba, K. Fukuda

    Springer 2007/05

  5. Enhanced radio access technologies for next generation mobile communication

    Y. Park, F. Adachi

    Springer 2007/02

  6. Communications Engineering

    F. Adachi

    Asakura Publishing 2007/02

  7. Wireless Communications in the 21st century

    F. Adachi

    2002/01

  8. Wireless Communication Technologies: New multimedia systems

    F. Adachi, M. Sawahashi

    2000/07

  9. Insights into mobile multimedia communications

    F. Adachi, K. Ohno, M. Sawahashi, A. Higashi

    1999

  10. CDMA移動通信システム(翻訳)

    安達

    1997/05

  11. ディジタル移動通信

    安達

    1992/09

  12. 移動通信

    章, 安達, 第, 章, 安達,須田

    1989/09

  13. 移動通信の基礎

    安達

    1976/10

Show all Show first 5

Presentations 229

  1. Towards the realization of a highly sustainable and resilient 6G RAN Invited

    Fumiyuki Adachi

    International Conference on Computing, Networking and Communications (ICNC 2026) 2026/02/18

  2. Scalable and Energy-Efficient Distributed Massive Multiuser-MIMO for Enabling 6G Mobile Communications Invited

    Fumiyuki Adachi

    IEEE IC and mmWave Platforms and Advanced Circuit Technologies for 6G Communications (IEEE IMPACT) 2025/11/03

  3. Reconfigurable User-centric RAN for Resilient and Sustainable 6G Invited

    Fumiyuki Adachi

    International Forum on IoT Technology and Applications 2025 2025/10/31

  4. Towards Resilient and Green 6G -Multilayered Communication Network and Reconfigurable User-centric RAN- Invited

    Fumiyuki Adachi

    2025 IEEE 13th R10-HTC 2025/10/01

  5. Building Green and Resilient RAN for 6G Systems Invited

    Fumiyuki Adachi

    2025 5th International Conference on Intelligent Communications and Computing (ICICC2025) 2025/08/16

  6. Towards Building Sustainable and Resilient 6G Systems -Reconfigurable User-centric RAN- Invited

    Fumiyuki Adachi

    15th EAI International Conference on Wireless and Satellite Systems 2025/08/08

  7. Reconfigurable User-centric Radio Access Network for Building Green and Resilient 6G Systems Invited

    Fumiyuki Adachi

    The 13th Workshop on Advances in Wireless Communications 2025/06/29

  8. Reconfigurable User-centric Radio Access Network for Building Green and Resilient 6G Networks Invited

    Fumiyuki Adachi

    The 2nd International Workshop on Global Research Initiative for Wireless Technology (IGROW) 2025/04/24

  9. Optical & Wireless Integrated Reconfigurable User-centric Distributed mMIMO RAN for 6G systems Invited

    Fumiyuki Adachi

    International Conference on Computing, Networking and Communications (ICNC 2025) 2025/02/18

  10. User-centric Distributed Massive MIMO for The Ultimate Cellular Communication System Invited

    Fumiyuki Adachi

    2024 IEEE 24th International Conference on Communication Technology (ICCT) 2024/10/20

  11. Optical and Wireless Integrated User-centric RAN for 6G Systems Invited

    Fumiyuki Adachi

    IEEE Hong Kong 6G Wireless Summit 2024/09/12

  12. Distributed MIMO-based Radio Access Network for 6G Cellular Communications Invited

    Fumiyuki Adachi

    2024 International Conference on Ubiquitous Communication 2024/07/06

  13. Ultra-high-density, yet Reconfigurable Radio Access Network for B5G/6G Systems Invited

    Fumiyuki Adachi

    A3 Foresight Program, 2024 Workshop ~ AI-Based Future IoT Technologies and Services~ 2024/02/20

  14. Recent Advances in Wireless Technology Towards B5G/6G Invited

    Fumiyuki Adachi

    2023 The 11th International Conference on Information Technology (ICIT2023) 2023/12/14

  15. On Reconfigurable User-centric Radio Access Network Toward B5G/6G Communications Invited

    Fumiyuki Adachi

    BrainLink X-Lab Day for “6G Semantic Communication” 2023/11/09

  16. Restructuring The Radio Access Network for B5G/6G Communications Invited

    Fumiyuki Adachi

    2023 IEEE The 23rd International Conference on Communication Technology (IEEE ICCT 2023) 2023/10/20

  17. Scalability, Flexibility, and Resiliency-enhanced Ultra-dense RAN towards Beyond 5G/6G Mobile Communications Systems Invited

    Fumiyuki Adachi

    Workshop on Advances in Wireless Communications (WAWC 2023) 2023/08/28

  18. Wireless Challenges for the Evolution of Mobile Communications: ~ Past and Future ~ Invited

    Fumiyuki Adachi

    The 1st German-Japanese Beyond 5G/6G Research Workshop 2023/04/25

  19. Challenges Towards Beyond 5G Invited

    Fumiyuki Adachi

    Global 6G Conference 2023/03/24

  20. 空間多重を導入したセルフリー/分散Massive MIMO ‐動的でスケーラブルなユーザ中心の仮想極小セルネットワークの実現‐ Invited

    安達文幸, 高橋領

    信学会総合大会,チュートリアルセッションBT-1:B5G/6Gに向けた先進技術 2023/03/08

  21. A concept of user-centric ultra-dense distributed MIMO towards realizing Beyond 5G systems Invited

    Fumiyuki Adachi

    International Conference on Computing, Networking and Communications (ICNC 2023) 2023/02/20

  22. An effective interference suppression technique for a user-centric ultra-dense distributed MIMO towards realizing Beyond 5G systems Invited

    Fumiyuki Adachi

    2022 10th International Japan-Africa Conference on Electronics, Communications, and Computations (JAC-ECC 2022) 2022/12/19

  23. Joint Transmit-Receive Diversity to Make Wireless Communications Reliable Invited

    Fumiyuki Adachi

    2022 10th International Japan-Africa Conference on Electronics, Communications, and Computations (JAC-ECC 2022) 2022/12/20

  24. History of Mobile Communication Systems Evolution, and Wireless Challenge Towards Beyond 5G

    Fumiyuki Adachi

    The 14th International Conference on Wireless Communications and Signal Processing (WCSP 2022) 2022/11/02

  25. On Restructuring Radio Access Network (RAN) Towards Beyond 5G: Concept of A Scalable and Reconfigurable RAN Invited

    Fumiyuki Adachi

    25th International Symposium on Wireless Personal Multimedia Communications (WPMC 2022) 2022/11/01

  26. Ultra-densification of Radio Access Network Toward 5G-Advanced/Beyond 5G Systems Invited

    Fumiyuki Adachi

    2nd SNU-BK Workshop on Next-generation Wireless Communication and Networking 2022/08/31

  27. Ultra-Dense Wireless for 5G-advanced and Beyond 5G Invited

    Fumiyuki Adachi

    Australia-Korea Research Collaboration Workshop 2022/07/04

  28. Wireless Challenge Towards Beyond 5G Invited

    Fumiyuki Adachi

    International Conference on Electronics, Information, and Communication 2022 (ICEIC2022) 2022/02/08

  29. Wireless Challenge for Beyond 5G Invited

    Fumiyuki Adachi

    16th EAI International conference on Collaborative Computing: Networking, Applications and Worksharing (EAI CollaborateCom 2020) 2020/10/16

  30. Challenges for Advanced 5G - Realizing Ultra-dense RAN - Invited

    Fumiyuki Adachi

    The 1st Workshop on Intelligent IoT Connectivity, Automation and Applications, IEEE Wireless Communications and Networking Conference (WCNC 2020) 2020/05/25

  31. Ultra-dense Wireless Access Network for 5G Advanced Invited

    Fumiyuki Adachi

    2020 International Conference on Computing, Networking and Communications (ICNC) 2020/02/18

  32. Towards Environment-Adaptive Wireless Access NetworkFor 5G And Beyond Invited

    Fumiyuki Adachi

    The 22nd International Symposium on Wireless Personal Multimedia Communications (WPMC 2019) 2019/11/25

  33. 超高速移動無線通信のためのチャネル等化とMIMO送受信ダイバーシチ Invited

    安達文幸

    信学会RCS研究会「5Gの根幹をなす無線通信技術に関する基礎ワークショップ(第7回)」 2019/11/19

  34. Wireless Challenge Towards 5G And Beyond~ Ultra-dense Edge Wireless Access Networks ~ Invited

    Fumiyuki Adachi

    2019 International Workshop on Advances in Information Coding and Wireless Communications (AICWC'2019) 2019/10/31

  35. Wireless Evolution Towards 5G and Beyond ~ Ultra-dense Wireless Network ~ Invited

    Fumiyuki Adachi

    Northeast Asian Symposium on IoT with Intelligence 2019 2019/09/18

  36. Wireless Evolution Towards 5G and Distributed MIMO Invited

    Fumiyuki Adachi

    2019 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM’19) 2019/08/21

  37. Spectrum Efficiency and Scalability-enhanced Distributed MIMO

    Fumiyuki Adachi

    Japan-China Workshop on the Next Generation Mobile Communication Technology and Application 2019 2019/08/10

  38. Tutorial: Distributed MIMO Radio Access Network: Architecture, Cooperative Transmission, Channel Estimation, and Interference Management Invited

    Fumiyuki Adachi

    15th International Wireless Communications & Mobile Computing Conference (IWCMC 2019),Tangier, Morocco 2019/06/24

  39. Enhancing 5G Radio Access Networks by Exploitation of Spatially Distributed Antennas and Users Invited

    Fumiyuki Adachi

    Global IEEE 5G-IoT Summit Tangier 2019/06/24

  40. Wireless Evolution Towards 5G Invited

    Fumiyuki Adachi

    International Symposium on Networks, Computers and Communications (ISNC2019) 2019/06/18

  41. Evolution Into 5Gand The Next Invited

    Fumiyuki Adachi

    W5: Technology Trials and Proof-of-Concept Activities for 5G and Beyond Industry and Academic Panel 2019 (TPoC5G Panel 2019), 2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) 2019/04/28

  42. Wireless Evolution Towards 5G and Beyond Invited

    Fumiyuki Adachi

    International Symposium on Frontier of Open Computing and Ubiquitous Sensing (FOCUS 2019) 2019/03/27

  43. Wireless Evolution Towards 5G and Beyond Invited

    Fumiyuki Adachi

    2019 3rd International Conference on Recent Advances in Signal Processing, Telecommunications & Computing (SigTelCom), Hanoi, Vietnam 2019/03/21

  44. Diversity, Multiplexing, and PAPR Reduction Techniques for 5G Distributed MIMO Radio Access Network Invited

    Fumiyuki Adachi

    2019 International Conference on Computing, Networking and Communication (ICNC 2019) 2019/02/19

  45. Decentralized Radio Resource Management for Dense Heterogeneous Wireless Networks Invited

    Fumiyuki Adachi

    The 16th International Conference on Communication Systems (ICCS 2018) 2018/12/20

  46. Evolution Into 5G and Distributed MIMO for enhanced Mobile Broadband Invited

    Fumiyuki Adachi

    International Conference on Smart Applications, Communications and Networking (SmartNets-2018) 2018/11/16

  47. Wireless Challenges Towards 5G and Beyond Invited

    Fumiyuki Adachi

    The 24th Asia-Pacific Conference on Communications (APCC 2018) 2018/11/12

  48. Distributed MIMO Cooperative Transmission In A High Mobility Environment

    Fumiyuki Adachi

    Japan-China Workshop on the Next Generation Mobile Communication Technology and Application 2018 2018/08/20

  49. Recent Advances in Distributed MIMO and Radio Resource Management for 5G Mobile Communications Invited

    Fumiyuki Adachi

    IEEE Wireless Advanced (WIAD) Conference 2018/06/27

  50. Evolution into 5G and A New Radio Access Network Invited

    Fumiyuki Adachi

    Panel “The status of vertical application development to fit into the 5G ecosystem (spectrum, technology maturity, key players, operator role, standardization)”, The cm-wave and mm-wave based communications for 5G Networks (CmMmW5G) workshop at WCNC 2018 2018/04/15

  51. Future of Wireless Technologies: Evolution into 5G and distributed MIMO Invited

    Fumiyuki Adachi

    Sarajevo Symposium: Towards a Connected World of People and Things 2018/04/04

  52. Recent Advances in Distributed MIMO Transmission Techniques for 5G Mobile Communications Invited

    Fumiyuki Adachi

    Workshop on Advances in Wireless Communications (WAWC) 2018/03/30

  53. Recent Advances in Distributed MIMO Transmission Techniques for 5G Mobile Communications Invited

    Fumiyuki Adachi

    International Conference on Computing, Networking and Communications (ICNC 2018) 2018/03/06

  54. Mobile Communications Network Evolution and Distributed MIMO Invited

    Fumiyuki Adachi

    2018 International Conference on Electronics, Information and Communication 2018/01/24

  55. Wireless Challenges for 5G Mobile Broadband Communications Invited

    Fumiyuki Adachi

    The 23rd Asia-Pacific Conference on Communications (APCC2017) 2017/12/12

  56. Evolution of mobile radio communications systems and 5G

    Fumiyuki Adachi, Amnart Boonkjay, Tomoyuki Saito, Yuta Seki

    2017 Microwave Workshops & Exhibition (MWE2017) 2017/11/30

  57. Mobile Radio Evolution and Distributed MIMO for 5G Enhanced Mobile Broadband Invited

    Fumiyuki Adachi

    Advanced Wireless Networks Workshop, Organized by WISE Research Group 2017/11/21

  58. Distributed MIMO for 5G Enhanced Mobile Broadband Invited

    Fumiyuki Adachi

    2017 International Workshop on Advances in Information Coding and Wireless Communications (AICWC’2017) 2017/11/06

  59. Recent Advances in Distributed MIMO and Decentralized Radio Resource Management Invited

    Fumiyuki Adachi

    International Symposium on Frontier of Open Computing and Ubiquitous Sensing (FOCUS 2017) 2017/10/13

  60. Recent Advances in Distributed MIMO Transmission Techniques for 5G Enhanced Mobile Broadband

    Fumiyuki Adachi

    Japan-Sino Workshop on the Next Generation Mobile Communication Technology and Application 2017/07/08

  61. Distributed MIMO Signal Transmissions for 5G Mobile Communications Networks Invited

    Fumiyuki Adachi

    11th International ITG Conference on Systems, Communications and Coding (SCC 2017) 2017/02/09

  62. Virtual User-Centric Small Cell and Cooperative Signal Transmission for 5G Invited

    Fumiyuki Adachi

    International Conference on Computing, Networking and Communications 2017 (ICNC 2017) 2017/01/28

  63. Wireless Challenges for 5G Mobile Broadband Communications Invited

    Fumiyuki Adachi

    2017 NST (2017全國電信研討會,2017消息理論與通訊春季研討會,104年度科技部電信學門成果發表會) 2017/01/22

  64. Distributed MIMO Cooperative Signal Transmission for 5G Invited

    Fumiyuki Adachi

    2017 International Conference on Recent Advances on Signal Processing, Telecommunications & Computing (SigTelCom 2017) 2017/01/10

  65. Distributed Antenna Small-cell Network and Dense Heterogeneous Network for 5G Invited

    Fumiyuki Adachi

    First International Symposium on Frontier of Ubiquitous Computing and Communications (FOCUS) 2016/11/25

  66. Wireless Challenges for Spectrum and Energy Efficient 5G Mobile Communications Invited

    Fumiyuki Adachi

    The 19th International Symposium on Wireless Personal Multimedia Communications (WPMC 2016) 2016/11/14

  67. An Efficient Formation of User-centric Small-cells and Cooperative Broadband Signal Transmission Techniques Invited

    Fumiyuki Adachi

    Seminar “5G New Radio Enabling Technology in 3GPP Standard: Oversea Players’ view,” TTA (Telecommunications Technology Association) 2016/09/07

  68. Wireless Evolution Toward 5G and Distributed Antenna Cooperative Signal Transmission

    Fumiyuki Adachi

    Sino-Japan Workshop on the Next Generation Mobile Communication Technology and Application 2016/08/28

  69. Virtual User-Centric Small Cell and Cooperative Signal Transmission for 5G Invited

    Fumiyuki Adachi

    Global 5G Technology Summit, Shanghai 2016/07/20

  70. Wireless Network Evolution Toward 5G Invited

    Fumiyuki Adachi

    21st Optoelectronics and Communications Conference /International Conference on Photonics in Switching 2016 (OECC/PS2016), Niigata 2016/07/04

  71. Distributed Antenna Cooperative Signal Transmission for 5G Mobile Communications

    Fumiyuki Adachi

    The Fourth International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC 2016), Cairo, Egypt 2016/05/31

  72. Physical and Network Layers of 5G: Requirements, Challenges and Enabling Technologies

    Xianbin Wang, Tadilo Endeshaw Bogale, Fumiyuki Adachi

    2016 IEEE 83rd Vehicular Technology Conference (VTC2016 Spring), Tutorial T4 2016/05/15

  73. Radio and Optical Convergence in 5G Invited

    Fumiyuki Adachi

    OFC Workshop: How will Optical Technologies Support Wireless Communications in 5G and beyond? 2016/03/20

  74. Distributed Antenna Cooperative Signal Transmissions for 5G Networks Invited

    Fumiyuki Adachi

    International Conference on Computing, Networking and Communications (ICNC 2016) 2016/02/17

  75. Distributed Antenna Cooperative Signal Transmissions for 5G Networks Invited

    Fumiyuki Adachi

    The 8th International Conference on COMmunication Systems & NETworkS (COMSNETS 2016), Bangalore, India 2016/01/06

  76. Small-cell Structured Wireless Network for 5G: Centralized vs Decentralized Architecture Invited

    Fumiyuki Adachi

    18th International Symposium on Wireless Personal Multimedia Communications (WPMC 2015), Hyderabad, India 2015/12/14

  77. Small-cell Structured HetNet for 5G Mobile Communications Invited

    Fumiyuki Adachi

    2015 Asian Wireless Power Transfer Workshop (AWPT2015), New Taipei City, Taiwan 2015/12/10

  78. Cooperative Signal Transmission Using Distributed Antennas for 5G Mobile Communications Invited

    Fumiyuki Adachi

    10th International Conference on Information, Communications and Signal Processing (ICICS 2015), Singapore 2015/12/02

  79. Towards Energy-Efficient Hyper-Dense Wireless Networks with Trillions of Devices

    Abolfazl Mehbodni, Fumiyuki Adachi

    Tutorial T4, IEEE 26th International Symposium on Personal, Indoor and Mobile Radio International Symposium on Antennas and Propagation (ISAP 2015), Tasmania, Australia 2015/11/09

  80. Broadband Cooperative Signal Transmission Techniques for 5G Mobile Communications Invited

    Fumiyuki Adachi

    Sino-Japan Workshop on the Next Generation Mobile Communication Technology and Application, Xiamen, China 2015/11/09

  81. Small-cell Structured Wireless Network for 5G Mobile Communications Invited

    Fumiyuki Adachi

    10th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2015), Colombo, Sri Lanka 2015/08/05

  82. Challenges Toward Spectrum-Energy Efficient Wireless Networks Invited

    Fumiyuki Adachi

    IEICE Information and Communication Technology Forum 2015, Manchester, UK 2015/06/04

  83. Towards Energy-Efficient Hyper-Dense Wireless Networks with Trillions of Devices

    Ismail Guvenc, Abolfazl Mehbodniya, Fumiyuki Adachi

    Tutorial, IEEE Wireless Communications and Networking Conference (WCNC 2015), New Orleans, LA, USA 2015/03/09

  84. Virtual Macro-cell Network for 5G Invited

    Fumiyuki Adachi

    IEEE 6th Int. Workshop on Heterogeneous and Small Cell Networks (HetSNets), Austin, Texas, USA 2014/12/12

  85. Challenges for 5G wireless Invited

    Fumiyuki Adachi

    Panel on Heterogeneous Network: The Evolution from first deployment to 5G, IEEE 6th Int. Workshop on Heterogeneous and Small Cell Networks (HetSNets), Austin, Texas, USA 2014/12/12

  86. Challenges Toward Spectrum-Energy Efficient Gigabit Wireless Networks Invited

    Fumiyuki Adachi

    2014 Asia-Pacific Microwave Conference (APMC2014), Sendai, Japan 2014/11/05

  87. Energy-Efficient Resource Allocation for Next Generation Wireless Networks

    Abolfazl Mehbodniya, Fumiyuki Adachi, Ismail Guvenc

    Tutorial, IEEE VTC2014-Fall, Vancouver, Canada 2014/09/14

  88. Energy-Efficient Resource Allocation for Next Generation Wireless Networks

    Abolfazl Mehbodniya, Fumiyuki Adachi

    2014 European Signal Processing Conference (EUSIPCO2014), Lisbon, Portugal 2014/09/01

  89. Distributed Antenna Network Concept for Simultaneously Improving Spectrum and Energy Efficiencies Invited

    Fumiyuki Adachi

    The 11th IEEE Vehicular Technology Society Asia Pacific Wireless Communications Symposium (APWCS2014), Ping Tung, Taiwan 2014/08/28

  90. Toward Spectrum-Energy Efficient Wireless Networks Invited

    Fumiyuki Adachi

    International Wireless Communications & Mobile Computing Conference (IWCMC) 2014, Nicosia, Cyprus 2014/08/06

  91. Spectrum and Energy Efficiency Tradeoff Invited

    Fumiyuki Adachi

    Workshop on the Next Generation Mobile Communication Technologies and Applications-2014, Naha, Okinawa 2014/06/19

  92. Recent Advances in Disaster-resilient Multilayered Network Invited

    Fumiyuki Adachi

    IEEE ICC2014, Industry & Business Panel: Advanced Technologies for Disaster-Resilient Networks, Sydney, Australia 2014/06/11

  93. Spectrum & Energy-Efficient Distributed Antenna Network Invited

    Fumiyuki Adachi

    2012 Sarajevo Technology Forum, Sarajevo, Bosnia and Herzegovina 2014/05/24

  94. It Is The Time to Learn From Human Being Invited

    Fumiyuki Adachi

    2013 International Forum on Advances in Information Coding and Wireless Communications (AICWC’2013), Chengdu, China 2013/11/04

  95. Distributed Antenna Network for High Speed Mobility Scenarios Invited

    Fumiyuki Adachi

    The First International Workshop on High Mobility Wireless Communications (HMWC’2012), Chengdu, China 2012/11/10

  96. Distributed Antenna Network for Spectrum & Energy-Efficient Gigabit Wireless Communications Invited

    Fumiyuki Adachi

    IEEE ISPACS 2012, Tamsui, New Taipei City, Taiwan 2012/11/05

  97. Recent Advances in Distributed Antenna Network Invited

    Fumiyuki Adachi

    Workshop on the Next Generation Mobile Communication Technologies and Applications-2012, Zhangjiajie, China 2012/09/17

  98. Spectrum & Energy-Efficient Distributed Antenna Network with Distributed MIMO Signal Processing Invited

    Fumiyuki Adachi

    International Workshop on Recent Trends in Distributed Multi-user MIMO Communications, Kyoto U, Japan 2012/08/22

  99. Spectrum & Energy-Efficient Distributed Antenna Network Invited

    Fumiyuki Adachi

    Workshop on Advances in Wireless Communications 2012 (WAWC’12), UESTC, Chengdu, China 2012/07/19

  100. Spectrum & Energy-Efficient Distributed Antenna Network Invited

    Fumiyuki Adachi

    Workshop on Advances in Wireless Communications 2012 (WAWC’12), Southeast University, Nanjing, China 2012/07/16

  101. Spectrum & Energy-Efficient Distributed Antenna Network Invited

    Fumiyuki Adachi

    Panel: Next Generation Mobile Communication Technologies (8 May), IEEE 75th Vehicular Technology Conference, Yokohama, Japan 2012/05/08

  102. Wireless Future Invited

    Fumiyuki Adachi

    Panel: Wireless Future, The 2011 IEEE 73rd Vehicular Technology Conference (VTC2011-Spring), Budapest, Hungary 2011/09/18

  103. Challenge for Gigabit Wireless Invited

    Fumiyuki Adachi

    The 3rd Wireline/Wireless Technology Forum (Sarajevo Forum 2011), Sarajevo, Bosnia and Hertegovina 2011/05/19

  104. Wireless Future Invited

    Fumiyuki Adachi

    Panel: Wireless Future, The 2011 IEEE 73rd Vehicular Technology Conference (VTC2011-Spring), Marriot Hotel, Budapest, Hungary 2011/05/17

  105. 移動通信におけるマルチアクセス技術

    2009年信学会総合大会 2009/03/20

  106. シングルキャリア周波数領域繰り返し等化・残留干渉キャンセルにおける平均2乗誤差計算に関する検討

    安達, 武田,小島

    2009年信学会総合大会 2009/03/18

  107. IMT-Advanced実現に向けた無線技術の挑戦

    日本学術会議URSI-C委員会 第21期 第2回公開研究会 2009/01/09

  108. Broadband Distributed Wireless Signal Processing & Network Technology Invited

    Fumiyuki Adachi

    Sino-Japan Workshop on Future Mobile Communication Technologies, Li Jiang, China 2008/07/31

  109. Wireless challenge Invited

    Fumiyuki Adachi

    Joint Forefront Wireless Communication and Network Technology (FWCNT) International Workshop, Dalian Polytechnic University 2008/07/20

  110. Wireless challenge Invited

    Fumiyuki Adachi

    The 13th Symposium on Radio Technology across the Taiwan-straits, Harbin Institute of Technology 2008/06/23

  111. Wireless Challenge Invited

    Fumiyuki Adachi

    Panel “Wireless Multimedia Futures”, IEEE VTC2008 Spring, Singapore 2008/05/13

  112. Broadband Wireless Access Invited

    Fumiyuki Adachi

    13th Saudi Technical Exchange Meeting (STEM) workshop, Dhahran, Saudi Arabia 2008/04/27

  113. 第3世代移動通信のLong-term evolutionにおける無線アクセス技術

    2008年信学会総合大会 2008/03/20

  114. 情報エレクトロニクスシステム研究教育拠点

    2008年信学会総合大会 2008/03/19

  115. 周波数選択性チャネルにおけるMIMOチャネル容量

    2008年信学会総合大会 2008/03/19

  116. Broadband Wireless Technology for Next Generation Mobile Communications Systems Invited

    Fumiyuki Adachi

    The 10th International Symposium on Wireless Personal Multimedia Communications (WPMC 2007), Jaipur, India 2007/12/06

  117. 変調と信号処理の変遷:アナログからディジタルへ,狭帯域から広帯域通信へ

    日本学術会議URSI-C研究会 2007/11/09

  118. 次世代移動無線通信と信号処理

    信学会信号処理シンポジウム 2007/11/08

  119. Gigabit wireless access and network technologies International-presentation

    Wireless Broadband World Forum (WBWF) 2007/10/29

  120. 第3世代移動通信方式の発展と今後の展開

    電気学会電子回路研究会 2007/10/23

  121. New Direction of Wireless Technology Invited

    Fumiyuki Adachi

    The 3rd International Workshop on Signal Design and its Applications in Communications, Chengdu, China 2007/09/24

  122. Frequency-domain Wireless Signal Processing International-presentation Invited

    Fumiyuki Adachi

    Seminar on Sino-Japan B3G Technology and Application, Dunhuang, China 2007/07/26

  123. Broadband Wireless Technology for Next Generation Mobile Communications Systems International-presentation

    Fumiyuki Adachi

    Analog Decoding Workshop 2007, McGill University, Montreal 2007/05/25

  124. SC-FDE技術の新たな展開

    信学会東京支部シンポジウム 2007/02/23

  125. Broadband CDMA Technology for Next Generation Mobile Communication Systems Invited

    Fumiyuki Adachi

    2006 China-Japan Advanced Workshop on Antennas and Microwave Technology (CJAWAMT’06), Xi’an, China 2006/08/16

  126. Gigabit Wireless Techniques for 4G Mobile Communications Network Invited

    Fumiyuki Adachi

    Sino-Japan Future Mobile Communication Technologies Workshop, Guilin, China 2006/06/02

  127. Gigabit Wireless Techniques for 4G Mobile Communications Network International-presentation

    Sino-Japan Future Mobile Communication Technologies Workshop 2006/06/01

  128. Broadband CDMA techniques Invited

    Fumiyuki Adachi

    National ICT Australia Wireless Winter School, Melbourne, Australia 2006/05/11

  129. From Wireless Voice to Wireless Video International-presentation Invited

    Fumiyuki Adachi

    Panel: The Future of Wireless - A Glimpse beyond the Horizon, in 2006 IEEE 63rd Vehicular Technology Conference, Melbourne, Australia 2006/05/08

  130. Gigabit Wireless Techniques for 4G Mobile Communications Network International-presentation Invited

    Fumiyuki Adachi

    IEE Mobility Conference 2005: The Second International Conference on Mobile Technology, Applications and Systems, Guangzhou, China 2005/11/15

  131. 超高速を狙うブロードバンド移動無線技術

    MWEマイクロウェーブワークショップ 2005/11/08

  132. Broadband CDMA techniques International-presentation Invited

    Fumiyuki Adachi

    2nd International Workshop on Sequence Design and its Applications to Communications (IWSDA05), Shimonoseki, Japan 2005/10/12

  133. From Wireless Voice To Wireless Visual Communications International-presentation Invited

    Fumiyuki Adachi

    Panel: MIMO Techniques - Since Then, in WPMC05, Aalborg, Denmark 2005/09/19

  134. From Wireless Voice To Wireless Visual Communications Invited

    Fumiyuki Adachi

    Panel: Asia driving B3G/4G - What, Why and How, in the First International Wireless Summit 2005 (IWS2005), Aalborg, Denmark 2005/09/21

  135. Broadband CDMA Techniques International-presentation Invited

    Fumiyuki Adachi

    4G Forum, King’s College London, U.K. 2005/06/03

  136. Broadband CDMA Techniques International-presentation Invited

    Fumiyuki Adachi

    International Symposium on Embedded Technology, Yeungnam University, Korea 2005/05/20

  137. 超高速を狙う次世代移動無線技術~進化を続ける携帯電話

    第28回高柳記念未来技術フォーラム 2005/05/13

  138. Wireless challenge Invited

    Fumiyuki Adachi

    Workshop “Technologies for future broadband solutions,” organized by National Technology Agency of Finland TEKES, Toranomon Pastoral, Tokyo, Japan 2004/11/24

  139. CDMA-based Giga-bit Wireless Technology International-presentation Invited

    Fumiyuki Adachi

    The Sweden-Japan Workshop on Future Wireless Technologies, Snogeholm Castle, Sweden 2004/09/17

  140. CDMA-based giga-bit wireless technology Invited

    Fumiyuki Adachi

    SAMSUNG 4G Forum 2004, Jeju Island, Korea 2004/08/24

  141. Challenging for giga-bit mobile wireless technology International-presentation Invited

    Fumiyuki Adachi

    1st Regional Conference on ICT and E-Paradigms, Colombo, Sri Lanka 2004/06/25

  142. Wireless challenge Invited

    Fumiyuki Adachi

    International Conference on Beyond 3G Mobile Communications-2004 (ICB3G-2004), Shinagawa, Tokyo, Japan 2004/05/27

  143. Challenging for giga-bit wireless technology International-presentation Invited

    Fumiyuki Adachi

    The 1st IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS), Seoul National University, Seoul, Korea 2004/01/08

  144. 広帯域移動無線技術の動向 Invited

    安達文幸

    電子情報通信学会信越支部大会「特別講演」,新潟工科大学 2003/10/18

  145. ブロードバンド移動無線技術の動向 Invited

    安達文幸

    第五回DSPS教育者会議,東工大 2003/09/17

  146. Broadband Mobile Technology Invited

    Fumiyuki Adachi

    ESF/PESC Exploratory Workshop: Signal Processing for Wireless Communication (SPWC), IEE Conference Centre, Savoy Place, UK 2003/05/19

  147. Broadband Mobile Technology Invited

    Fumiyuki Adachi

    The 5th Smart Antenna Workshop with Emphasis on SDR Application, Hanyang University, Korea 2003/04/21

  148. Challenges for Broadband Mobile Technology Invited

    Fumiyuki Adachi

    12th International Conference on Antennas & Propagation (ICAP 2003), University of Exeter, UK 2003/04/01

  149. Challenges for broadband wireless technology Invited

    Fumiyuki Adachi

    2003 RCIQE International Seminar on “Quantum Nanoelectronics for Meme-Media-Based Information Technologies”, Hokkaido University 2003/02/13

  150. Challenges for broadband wireless systems International-presentation Invited

    Fumiyuki Adachi

    2003 International Technology Conference “Technology Drivers for Tomorrow", Hong Kong 2003/01/14

  151. CDMA 及びIMT-2000のシステム技術 Invited

    安達文幸

    通信学会関西支部基礎講座,第9回「CDMA 及びIMT-2000のシステム技術」,中央電気倶楽部 2002/07/06

  152. 発展を続けるワイヤレス通信技術 Evolving wireless communications technology Invited

    安達文幸

    信学会総合大会,基礎境界チュートリアル「新世代の回路とシステム理論の展望」 2002/03/27

  153. Technology challenges for beyond IMT-2000 Invited

    Fumiyuki Adachi

    Panel “What is beyond IMT-2000,” The 7th Asia-Pacific Conference on Communications, Tokyo, Japan 2001/09/18

  154. CDMA 及びIMT-2000のシステム技術 Invited

    安達文幸

    通信学会関西支部基礎講座,第9回「CDMA 及びIMT-2000のシステム技術」,中央電気倶楽部 2001/07/07

  155. IMT-2000 Invited

    Fumiyuki Adachi

    Asia Pacific Telecommunity Seminar, Yokosuka Research Park, Japan 2001/03/02

  156. 移動ワイヤレス通信技術の展望と超伝導デバイスへの期待 Invited

    安達文幸

    超伝導応用研究会シンポジウム「高温超電導体(HTS)を用いたエレクトロニクスデバイスの開発」,高エネルギー加速器研究機構,筑波 2001/02/02

  157. Perspective of mobile communications Invited

    Fumiyuki Adachi

    7th International Conference on Communication Systems (ICCS’00), Singapore 2000/11/23

  158. 移動無線技術のこれまでの10年,そしてこれからの10年 Invited

    安達文幸

    信学会無線システム研究会, 清里, 山梨 2000/11/16

  159. 移動無線の将来展望 Invited

    安達文幸

    信学会スペクトル拡散研究会,仙台秋保 2000/10/19

  160. 無線方式の発展と展望 Invited

    安達文幸

    信学会東京支部シンポジウム: “第四世代移動通信,” 機械振興会館 2000/09/19

  161. 次世代移動通信システム(IMT-2000)への期待と無線技術の概要 Invited

    安達文幸

    日本学術振興会「超伝導エレクトロニクス第146委員会」・「マイクロ波〜光分科会」研究会,超電導工学研究所(SRL),東京 2000/07/28

  162. Challenges in realizing the multimedia mobile communications era Invited

    Fumiyuki Adachi

    1999 IEEE International Symposium on Intelligent Signal Processing and Communication System (ISPACS’99), Phuket, Thailand 1999/12/08

  163. Challenges of Wireless Millennium Invited

    Fumiyuki Adachi

    Symposium on 3rd Generation Mobile Communications and Wireless Internet, The University of Hong Kong 1999/12/06

  164. Challenges in wireless communications Invited

    Fumiyuki Adachi

    Rutgers University WINLAB’s 10th and Marconi’s 100th Anniversary Celebration “Wireless-Yesterday, Today and Tomorrow,” 1999/09/30

  165. Challenges of wireless communications -IMT-2000 and beyond- Invited

    Fumiyuki Adachi

    2nd International Symposium on Wireless Personal Multimedia Communications (WPMC’99), Amsterdam, The Netherlands 1999/09/21

  166. Challenges in realizing the multimedia mobile communications era: IMT-2000 and beyond Invited

    Fumiyuki Adachi

    CWC Annual Seminar’99, Singapore 1999/09/08

  167. 携帯電話のつながるしくみ Invited

    安達文幸

    電子情報通信学会科学教室「不思議がいっぱい科学の世界」, 佐渡・相川,新潟 1999/07/15

  168. Challenges towards multimedia mobile communications era: IMT-2000 and beyond Invited

    Fumiyuki Adachi

    1999 International Technical Conference on Circuit/Systems, Computers and Communications (ITC-CSCC’99), Sado-island, Niigata, Japan 1999/07/15

  169. When is W-CDMA available? Invited

    Fumiyuki Adachi

    Panel in 3rd European Personal Mobile Communications Conference (EPMCC’99), Paris, France 1999/03/11

  170. Wireless future: third generation and beyond Invited

    Fumiyuki Adachi

    Panel: “Wireless future: Third Generation and Beyond” in the 1st International Symposium on Wireless Personal Multimedia Communications (WPMC’98), Yokosuka, Japan 1998/11/05

  171. W-CDMA: Experiments and advanced technologies Invited

    Fumiyuki Adachi

    The 3rd CDMA International Conference and Exhibition (CIC), Seoul, Korea 1998/10/28

  172. W-CDMA: towards a global standard Invited

    Fumiyuki Adachi

    Panel “IMT-2000 services and standardization,” in the 3rd CDMA International Conference and Exhibition (CIC), Seoul, Korea 1998/10/28

  173. W-CDMA mobile radio for 21st century Invited

    Fumiyuki Adachi

    CWC Annual Seminar’98 “Emerging Trends in Broadband Telecommunications”, Singapore 1998/09/15

  174. Wideband CDMA: the evolution of mobile communications systems Invited

    Fumiyuki Adachi

    IEEE 5th International Symposium on Spread Spectrum Techniques & Applications (ISSSTA’98), Sun City, The Republic of South Africa 1998/09

  175. Space-Time Processing For 2.5G And 3G Wireless Networks Invited

    Fumiyuki Adachi

    3G Panel in the 5th Workshop on Smart Antennas in Wireless Mobile Communications, Stanford University, USA 1998/07/24

  176. Application of adaptive antenna arrays to W-CDMA mobile radio Invited

    Fumiyuki Adachi

    The 5th Workshop on Smart Antennas in Wireless Mobile Communications, Stanford University, USA 1998/07/23

  177. Technological Trends in Wireless Technology for Next-Generation Mobile Communications Invited

    Fumiyuki Adachi

    Special Lecture, Shinetsu Branch of the Institute of Electronics, Information and Communication Engineers, Niigata Institute of Technology 1998/06/12

  178. Necessity of IMT2000 around the year 2001 in Japan Invited

    Fumiyuki Adachi

    Panel on Regional and International Standard Efforts, IEEE 48th VTC (IEEE VTC'98), Ottawa, Canada 1998/05

  179. Application of software radio to mobile communications Invited

    Fumiyuki Adachi

    Panel: Software radio, in the Software Radio and MMITS Forum, Keio University 1998/04/01

  180. W-CDMA Development for IMT2000 Invited

    Fumiyuki Adachi

    The 2nd China CDMA International Summit, Beijing, China 1998/03

  181. W-CDMA Radio Access Technology Suitable for 3rd Generation Mobile Systems Invited

    Fumiyuki Adachi

    The 3rd Generation Mobile Systems'98, Singapore 1998/02

  182. W-CDMA Development for IMT2000 Invited

    Fumiyuki Adachi

    3G W-CDMA Conference, Atlanta, USA 1998/02

  183. NTT DoCoMo’s R&D activities on IMT-2000 Invited

    Fumiyuki Adachi

    The 3rd Generation Mobile Commun. Symposium, Beijing, China 1998/01/10

  184. CDMA移動通信の基礎・応用・将来:次世代に向けたW-CDMA 移動無線アクセス Invited

    安達文幸

    第21回研究開発セミナ-, 電気通信大学共同研究センタ- 1997/07/16

  185. Coherent multi-rate wideband DS-CDMA for multimedia mobile/personal communications Invited

    M. Sawahashi, F. Adachi

    Workshop on wireless multi-media communications, King’s College London, UK 1997/06

  186. Coherent wideband DS-CDMA technology Invited

    Fumiyuki Adachi

    Symposium on W-CDMA Technology & Development, Huangshan, China 1997/05

  187. Wideband coherent DS-CDMA technology Invited

    Fumiyuki Adachi

    Panel in the 1st CDMA International Conference, Seoul, Korea 1996/11

  188. TDMAとCDMAの周波数効率の比較 Invited

    安達文幸

    パネルセッション, 信学会通信ソサイエティ, 金沢大 1996/09/18

  189. Wireless multimedia for mobile communications Invited

    Fumiyuki Adachi

    Workshop on wireless multi-media communications, King’s College London 1996/02

  190. Future mobile communication techniques Invited

    Fumiyuki Adachi

    The 2nd Annual Seminar on Wireless Communications, Centre for Wireless Communications, National University of Singapore 1995/09/08

  191. 最近の移動体通信技術 Invited

    安達文幸

    信学会北陸支部講演会,金沢工業大学 1994/12/08

  192. Speech coding technology for digital cellular systems Invited

    Fumiyuki Adachi

    Germany-Japan Forum on Information Technology 1991, Tokyo 1991/11

  193. Trends toward digital cellular systems in Japan Invited

    Fumiyuki Adachi

    Forum on Radio Communications, Seoul, Korea 1989/11/28

  194. Mobile radio research in Japan Invited

    Fumiyuki Adachi

    Cellular Radio Workshop, Bath University, United Kingdom 1985/07

  195. Decentralized Radio Resource Management for Dense Heterogeneous Wireless Networks Invited

    Fumiyuki Adachi

    2015 International Workshop on Advances in Information Coding and Wireless Communications, Southwest Jiaotong University, Chengdu, China 2015/10/20

  196. Does Decentralized Radio Resource Management make the 5G wireless network flexible enough? Invited

    Fumiyuki Adachi

    Panel: Challenges & Opportunities in Wireless Communications, 2015 International Workshop on Advances in Information Coding and Wireless Communications, Southwest Jiaotong University, Chengdu, China 2015/10/19

  197. Small-cell Structured Wireless Network for 5G Mobile Communications Invited

    Fumiyuki Adachi

    The 2nd Asia-Pacific Workshop on Wireless Networking and Communications (APWNC 2015), Changchun, China 2015/09/25

  198. Wireless Evolution and Challenges for 5G Wireless Networks Invited

    Fumiyuki Adachi

    The 2nd NAFOSTED Conference on Information and Computer Science (NICS 2015), Ho Chi Minh City, Vietnam 2015/09/16

  199. Advanced Air Interface Techniques for 5G: Emerging Concepts and Research

    Xianbin Wang, Tadilo Endeshaw Bogale, Fumiyuki Adachi

    Tutorial T8, IEEE 26th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2015), Hong Kong 2015/08/30

  200. Challenges Toward Spectrum-Energy Efficient Gigabit Wireless Networks Invited

    Fumiyuki Adachi

    次世代移動通信技術の開発と応用シンポジウム(台北,台湾) 2015/06/08

  201. Distributed Antenna Network for Spectrum & Energy-Efficient Gigabit Wireless Invited

    Fumiyuki Adachi

    2013 International Forum on Advances in Information Coding and Wireless Communications (AICWC’2013), Chengdu, China 2013/11/04

  202. Single-Carrier Frequency-domain Signal Processing for High Mobility Wireless, Invited

    Fumiyuki Adachi

    The 2nd International Workshop on High Mobility Wireless Communications, Shanghai, China 2013/11/03

  203. Disaster-resilient Multilayered Communications Network Invited

    Fumiyuki Adachi

    Workshop on Emerging Technologies and Trends for Public Safety Communications (IEEE-ETPSC'13), Berlin, Germany 2013/09/27

  204. Channel Segregation Algorithm for Solving Complex Channel Allocation Problem in Wireless Networks Invited

    Fumiyuki Adachi

    Workshop on the Next Generation Mobile Communication Technologies and Applications-2013, Guiyang, China 2013/07/31

  205. Disaster-resilient Multilayered Communications Network Invited

    Fumiyuki Adachi

    2013 IEICE Information and Communication Technology Forum (ICTF2013), Sarajevo, Bosnia and Herzegovina 2013/05/29

  206. Spectrum & Energy-Efficient Distributed Antenna Network for Future Wireless Communications Invited

    Fumiyuki Adachi

    IEEE Wireless Communications & Networking Conference (WCNC 2013), Shanghai, China 2013/04/08

  207. Wireless Futures: Are We Evolving or Degenerating? Invited

    Fumiyuki Adachi

    IEEE Wireless Communications & Networking Conference (WCNC), Shanghai, China 2013/04/08

  208. Gigabit Wireless Signal Processing and Networking Invited

    Fumiyuki Adachi

    Computers, Communications and IT Applications Conference 2013 (ComComAp2013), HKUST, Hong Kong 2013/04/02

  209. Spectrum & Energy-Efficient Gigabit Wireless Communications Invited

    Fumiyuki Adachi

    A3 Foresight Program: Mini-Workshop on Next Generation Networks and Network Security, Jeju, Korea 2013/02/21

  210. Recent Advances in Gigabit Wireless Technology Invited

    Fumiyuki Adachi

    Workshop on Broadband Single Carrier and Frequency Domain Communications, IEEE Globecom 2010, Miami, USA 2010/12/06

  211. Challenge for Gigabit Wireless Invited

    Fumiyuki Adachi

    The 3rd International conference on Forefront Wireless Communications & Optical Communications and Network Technology (FWOCNT), Nanjing University of Information Science & Technology 2010/12/04

  212. Challenge for Gigabit Wireless Pipe Invited

    Fumiyuki Adachi

    The 12th IEEE International Conference on Communication Systems (ICCS 2010), Singapore 2010/11/18

  213. Challenge for Gigabit Wireless Invited

    Fumiyuki Adachi

    5th International ICST Conference on Communications and Networking in China (ChinaCom2010), Beijing, China 2010/08/26

  214. Gigabit Distributed Antenna Network And Its Related Wireless Techniques Invited

    Fumiyuki Adachi

    Sino-Japan Workshop on Future Mobile Communication Technologies, Xining, China 2010/08/07

  215. MIMO vs. Co-operation Invited

    Fumiyuki Adachi

    Panel in VTC2010-Spring, Taipei, Taiwan 2010/05/19

  216. Recent Advances in Broadband Wireless Technology Invited

    Fumiyuki Adachi

    The 2010 International Conference on Communications and Mobile Computing (CMC 2010), Shenzhen, China 2010/04/12

  217. Broadband Wireless Technology Invited

    Fumiyuki Adachi

    The 2010 International Conference on Computer Applications (ICCA2010), Yangon, Myanmar 2010/03/05

  218. Broadband Wireless Technology Invited

    Fumiyuki Adachi

    Wireline/Wireless Technology Forum, Sarajevo, Bosnia and Herzegovina 2010/05/07

  219. Recent Advances in Single-carrier Frequency-domain Equalization and Distributed Antenna Network Invited

    Fumiyuki Adachi

    International Conference on Information, Communications and Signal Processing (ICICS) 2009, Macau 2009/12/08

  220. Broadband Wireless Technology Invited

    Fumiyuki Adachi

    The 2009 International Conference on Wireless Communications and Signal Processing (WCSP2009), Nanjing, China 2009/11/14

  221. Wireless Challenge for Next Generation Mobile Communications Invited

    Fumiyuki Adachi

    International Workshop for RU-IPTV Research Center, Kyung Hee U., Seoul, Korea 2009/11/10

  222. Wireless Challenge for A Future Broadband Network Invited

    Fumiyuki Adachi

    IEEE International Conference on Network Infrastructure and Digital Content, Beijing, China 2009/11/07

  223. Wireless Challenge Invited

    Fumiyuki Adachi

    The Fourth International Workshop on Signal Design and its Applications in Communications (IWSDA'09), Fukuoka, Japan 2009/10/22

  224. Frequency-Domain Signal Processing and Distributed Antenna Network Invited

    Fumiyuki Adachi

    Technical Panel “The Wireless Communications of The Future,” VTC 09’ Fall, Anchorage, Alaska 2009/09/21

  225. Advances in Single-Carrier Frequency-Domain Equalization and Distributed Antenna Network Invited

    Fumiyuki Adachi

    Sino-Japan Workshop on Future Mobile Communication Technologies, Jiuzhaigou, Sichuan Province, China 2009/09/02

  226. Development of 3G Services and Beyond in Japan,” The 2nd Joint Front Wireless Communication Invited

    Fumiyuki Adachi

    Optical communication and Networking Technology (FWOCNT) International Workshop, Dalian, China 2009/07/25

  227. Single-carrier Packet Access In A Frequency-Selective Channel Invited

    Fumiyuki Adachi

    Wireless Internet Center for Advanced Technology (WICAT) Workshop on Single Carrier FDMA, Brooklyn, New York, USA 2009/03/13

  228. Wireless Challenge Invited

    Fumiyuki Adachi

    2008 China-Japan-Korea Graduates Workshop on Electronic Information, University of Electronic Science and Technology of China (UESTC), China 2008/10/30

  229. Multimedia mobile radio access based on coherent multicode DS-CDMA Invited

    Fumiyuki Adachi

    The 2nd Quebec-Kansai International Workshop on Wireless Personal Communications, Session 2, Kyoto University 1995/10/31

Show all Show first 5

Industrial Property Rights 20

  1. 無線アクセスネットワークシステム

    天間 克宏, 久利 敏明, 安達 文幸

    特許第7440891号

    Property Type: Patent

  2. 送信装置、受信装置、送信方法及び受信方法

    湯田 泰明, 中尾 正悟, 星野 正幸, 山本 哲矢, 安達 文幸

    特許第6551690号

    Property Type: Patent

  3. 無線通信システムおよび無線通信方法

    石原 浩一, アベーセーカラ ヒランタシティラ, 溝口 匡人, 安達 文幸

    特許第6308562号

    Property Type: Patent

  4. 通信システム

    花海 丞, 織田 健志, 佐々木 範雄, 安達 文幸

    特許第6265506号

    Property Type: Patent

  5. 通信システム

    花海 丞, 織田 健志, 佐々木 範雄, 安達 文幸

    特許第6222705号

    Property Type: Patent

  6. 通信装置及び通信制御方法

    石原 浩一, アベーセーカラ ヒランタシティラ, 溝口 匡人, 熊谷 智明, 安達 文幸, 松村 祐輝, 天間 克宏

    特許第6145938号

    Property Type: Patent

  7. 通信システム及び通信制御方法

    石原 浩一, アベーセーカラ ヒランタシティラ, 熊谷 智明, 安達 文幸, 松村 祐輝, マルティン トゥア ハモナンガン シライト, 天間 克宏

    特許第6083875号

    Property Type: Patent

  8. 無線通信システム、及び送信電力制御方法

    石原 浩一, アベーセーカラ ヒランタシティラ, 溝口 匡人, 熊谷 智明, 安達 文幸, 松村 祐輝, 天間 克宏, 小原 辰徳, 山本 哲矢

    特許第6061389号

    Property Type: Patent

  9. 干渉電力補正方法、チャネル選択方法及び無線通信システム

    熊谷 智明, 石原 浩一, アベーセーカラ ヒランタシティラ, 安達 文幸, 松村 祐輝, 天間 克宏

    特許第6029071号

    Property Type: Patent

  10. 送信装置及び送信方法

    木村 良平, 大泉 透, 高岡 辰輔, 湯田 泰明, 今村 大地, 安達 文幸, 山本 哲矢

    特許第5860885号

    Property Type: Patent

  11. SC-FDMA送信装置及び送信方法

    木村 良平, 大泉 透, 小川 佳彦, 今村 大地, 安達 文幸, 山本 哲矢

    特許第5826852号

    Property Type: Patent

  12. 送信装置、受信装置、送信方法及び受信方法

    湯田 泰明, 中尾 正悟, 星野 正幸, 山本 哲矢, 安達 文幸

    Property Type: Patent

  13. 無線アクセスネットワークシステム

    天間 克宏, 久利 敏明, 安達 文幸

    Property Type: Patent

  14. 通信システム

    花海 丞, 織田 健志, 佐々木 範雄, 安達 文幸

    Property Type: Patent

  15. 無線通信システムおよび無線通信方法

    石原 浩一, アベーセーカラ ヒランタシティラ, 溝口 匡人, 安達 文幸

    Property Type: Patent

  16. 通信システム

    花海 丞, 織田 健志, 佐々木 範雄, 安達 文幸

    Property Type: Patent

  17. 無線通信システム、無線通信方法、および制御装置

    石原 浩一, アベーセーカラ ヒランタシティラ, 安達 文幸, 天間 克宏, シライト マルティン トゥア ハモナンガン

    Property Type: Patent

  18. 通信システム及び通信制御方法

    石原 浩一, アベーセーカラ ヒランタシティラ, 熊谷 智明, 安達 文幸, 松村 祐輝, マルティン トゥア ハモナンガン シライト, 天間 克宏

    Property Type: Patent

  19. 干渉電力補正方法、チャネル選択方法及び無線通信システム

    熊谷 智明, 石原 浩一, アベーセーカラ ヒランタシティラ, 安達 文幸, 松村 祐輝, 天間 克宏

    Property Type: Patent

  20. 通信システム

    古川 雅智, 安達 文幸, 大森 慎吾

    Property Type: Patent

Show all Show first 5

Research Projects 7

  1. Research and Development for Further Advancement of 5th Generation Mobile Communication Systems

    Takahide MURAKAMI, Hiroyuki SHINBO, Yu TSUKAMOTO, Shinobu NANBA, Yoji KISHI, Morihiko TAMAI, Hiroyuki YOKOYAMA, Takanori HARA, Koji ISHIBASHI, Kensuke TSUDA, Yoshimi FUJII, Fumiyuki ADACHI, Keisuke KASAI, Masataka NAKAZAWA, Yuta SEKI, Takayuki SOTOYAMA

    2019/09 - 2023/03

  2. 次世代無線通信システムのための高精度圧縮チャネル推定

    安達 文幸, GUAN Gui

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2012 - 2014/03/31

    More details Close

    本年度、私たちは低速アナログ-デジタル変換回路(ADC)サンプリングに基づき、高解像度の圧縮チャネル推定法により、スパースマルチパスブロードバンド協調ネットワークと双方向中継ネットワーク(TWRN)の研究を行った。まず、低速ADCのサンプル抽出し、協調ネットワークにより変調される広帯域通信システムにおける高解像の圧縮チャネルの推定方法を提案した。また、スパースマルチパスブロードバンドMIMO-OFDM-TWRNにおける高解像の圧縮チャネル推定法の検討を行った。 これまでの研究成果は、下記の4つにまとめることができる。 1、一対一ブロードバンド無線通信を対象として提案した圧縮検出理論に基づくチャネル推定法は、既知トレーニング系列を短縮できるので、線形チャネル推定法より高い伝送効率を達成できる。 2、協調ネットワークと双方向中継ネットワークを含む協調通信へ圧縮検出理論に基づくチャネル推定法を拡張した。 3、圧縮検出理論に基づくチャネル推定のための検出行列の設計法を提案した。これにより、チャネル推定精度を更に向上できるようになった。 4、低速アナログ-デジタル変換回路(ADC)サンプリングを用いる高解像度圧縮チャネル推定法を提案した。

  3. 異種UWBベースWPANネットワークのための干渉に強いMACレイヤーに関する研究

    安達 文幸, MEHBODNIYA Abolfazl

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2010 - 2012

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    ユーザー満足度を最大化しながら異種ネットワーク間をシームレスに移動するための多基準VHOアルゴリズムを提案した.提案VHOアルゴリズムは,2つの重要なサブモジュールから構成されている.1つ目のモジュールはハンドオフの必要性を判断するもので,2つ目のモジュールはハンドオフ先の最適なネットワークを選択するものである.これらのモジュールでは,曖昧順位付けアルゴリズム(FRA)と,削減された規則を持つ複数の並列曖昧論理コントローラ(FLCs)とを用いている.予め複数のFRAを評価して,それらの中から最も特性の良いFRAを選択した.4つの異なるトラヒッククラス(会話,背景,インタラクティブおよびストリーミング)を考慮した.無線メトロポリタンエリアネットワーク(WMAN),無線広域ネットワーク(WWAN),無線パーソナルエリアネットワーク(WPAN)の3つの異なるネットワークを対象に計算機シミュレーションを行った結果,提案VHOアルゴリズムが受信信号レベル(RSS)-負荷バランスに基づくアルゴリズムより,優れた性能を得ることができることを示した.例えば,会話トラフィックを対象とした場合,理想的な解決策に近い他のF殿を使用するときより,ネットワーク全体のアウテージ確率を約10%,ハンドオフ率を32%低減できる. 本研究では,異種ネットワークのためのRRMをVHOモジュールに重点を置いて設計した後,ノードが同時に二つのUWB技術を採用しているWPANネットワークにおけるRRMの検討へと拡張した.異種ネットワークでは干渉管理,動的チャネル割り当て,接続管理,等などいくつかの問題がある.そこで,これらの問題を解決するために,システム全体の性能を向上させ,通信回線アウテージ確率の他に狭帯域干渉(NBI)を考慮し,異種UPAN用の2つのRRMモジュール(すなわち,無線アクセス技術(RAT)選択とVHOのためのアルゴリズム)を提案した.提案RRMアルゴリズムは,UWBベースのWPANにおける要求の拒絶確率を低減でき,サービス品質(GoS)を向上できる優れた性能を有していることを示した.

  4. 時分割直交周波数多重伝送のピーク電力低減と動的リソース割り当てに関する研究

    安達 文幸, GACANIN Haris

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2008 - 2009

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    次世代の移動無線通信システムでは周波数利用効率の高い超高速のデータ伝送が求められている。超高速伝送技術の一つとして有望なものに直交周波数分割多重(OFDM)があるが、高いピーク対平均電力比(PAPR)を有するという欠点がある。以前、申請者らはOFDMと同じ伝送速度のままでOFDMよりも低いPAPRを持つ、OFDMと時間分割多重(TDM)を組み合わせたOFDM/TDMを提案した。 OFDM/TDMでは、低PAPRを達成できるだけでなく、周波数領域等化を適用することによりOFDMより優れた伝送特性を達成できる。しかし、OFDM/TDMでも依然としてシングルキャリアよりPAPRが大きい。そこで、本研究では、OFDM/TDMのPAPRをさらに低減させる技術に取り組み、以下の成果を得た。 (1)時間領域・周波数領域選択マッピング(SLM)を提案し,累積分布90%点のPAPRの値をOFDMより約3.8dB低減できること、BER=10^<-3>を得るための所要ピークE_b/N_0(90%値)をOFDMより約1.2dB低減できることを、それぞれ示した。更に、従来のSLMよりも演算量を少なくできることも示した。 (2)OFDMより低いPAPRを保ちつつ、周波数ダイバーシチ効果を得て伝送特性をさらに改善するOFDM/TDM用の周波数領域インターリービングを提案し、BER=10^<-2>を得るための所要平均E_b/N_0をOFDMより約2.5dB低減できることを示した。

  5. 空間多重を導入してリンク容量を向上した無線マルチホップ仮想セルラーネットワークの研究

    安達 文幸, SALMA Ait Fares, AIT FARES S.

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2007 - 2008

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    次世代無線通信ネットワークでは超高速パケットサービスの提供が期待されているが,送信電力は無線伝送レートに比例して増大するという大きな問題がある.そのため,現在のセルラーネットワークの無線セル内に多数の中継用無線ポートを分散配置し,マルチホップにより中央ポートに信号を転送するバーチャルセルラーネットワーク(VCN)が提案されている.ところで,利用できる周波数帯域には制限があるから,周波数利用効率を高くするためには同一周波数をセル内のマルチホップルートで繰り返し利用しなければならない.これにより大きな同一周波干渉(CCI)が発生してしまう.マルチホップVCNの技術課題はCCIの効果的な抑圧である.本研究期間では,2ホップVCNを対象に,適応アンテナアレー(AAA)を用いる空間分割多重アクセス(SDMA)を導入してCCIを抑圧する課題に取り組んだ.下記の研究成果が得られた. 1.2ホップVCNにおいて,複数の中継無線ポート間で受信情報を交換することにより,中継無線ポートでの受信信号対雑音電力比(SNR)を向上し,中継局で送信AAAを行い,受信局で最大比合成受信する協調中継伝送法を提案した. 2.上記2ホップ中継における,受信SNRを最大とする送信AAAアンテナ重み,受信アンテナ重みを理論的に導出し,ビット誤り率(BER)特性を計算機シミュレーションにより求め,従来法に比べ良好なBER特性が得られることを明らかにした.さらに中継局の最適配置を明らかにした.

  6. Frequency-domain space-time coded transmit diversity

    ADACHI Fumiyuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2006 - 2008

  7. Study on realization of virtual cellular system for ultra high speed packet mobile network

    KUDOH Eisuke, ADACHI Fumiyuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2004 - 2006

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    For ultra high speed packet mobile network, we have proposed a virtual cellular system. Multi-hop route construction algorithm and radio resource allocation are important technical issues of virtual cellular system. Our study is summarized below. 1. Study of multi-hop route construction of virtual cell Multi-hop route construction algorithm based on the minimum transmit power criterion was proposed. To further reduce the route total transmit power, multi-hop maximal ratio combining (MHMRC) diversity was proposed and the power reduction by MHMRC diversity was evaluated by computer simulation. We also proposed a table-driven route reconstruction algorithm in order to reconstruct the multi-hop route rapidly when a link or port failure occurs. 2. Study on resource assignment of virtual cell An on-demand channel assignment strategy, using the channel segregation dynamic channel allocation (CS-DCA) algorithm, was proposed for multi-hop link among mobile terminal~wireless port~central port. Due to decreased transmit power in the multi-hop links, the decreased interference leads to less blocking probability compared to present cellular network. A call is blocked when there is no channel available at one link over the multi-hop route. To avoid the call blocking, a relay skipping method was proposed. The impact of the proposed method on the blocking probability was evaluated. 3. Study on 2-hop virtual cell In order to shift from an existing cellular system easily, the number of hops may be limited to 2. The impact of the distribution of wireless ports on the outage probability, the resource assignment algorithm and the throughput performance of 2-hop virtual cellular system were studied.

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  6. 電子情報通信学会東北支部評議員

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  1. 情報エレクトロニクスシステム教育研究拠点

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    人間性豊かなコミュニケーションを可能とするグローバルネットワークの構築をめざして、21COE拠点事業推進担当者のおよそ40%を入れ替え、研究の軸足をデバイス研究からシステム研究へと発展させる。知能情報システム研究分野へ研究の幅を広げ、研究体制を(A)情報・デバイス基礎、(B)ネットワーク、(C)知能情報システムの3グループに発展的に再編する。光・無線ネットワークの研究を重点に、情報通信デバイスと基礎理論、ヒューマンオリエンテッドな知的情報通信や、環境の自律認識・予測に基づく知能情報システムを開発する。 また,複眼的視点をもち、独創的科学技術の創出と国際性豊かで基礎からシステム応用に至る幅広い分野で世界的な活躍ができる若手研究者の育成をはかる。