Details of the Researcher

PHOTO

Takanori Hara
Section
Graduate School of Information Sciences
Job title
Specially Appointed Assistant Professor(Research)
Degree
  • Ph.D in Engineering (The University of Electro-Communications)

e-Rad No.
30964788

Research History 2

  • 2026/04 - Present
    Tohoku University Graduate School of Information Sciences Specially Appointed Assistant Professor

  • 2022/04 - 2026/03
    Tokyo University of Science Faculty of Science and Technology Electrical Engineering

Education 3

  • The University of Electro-Communications Graduate School of Informatics and Engineering Department of Computer and Network Engineering

    2019/04 - 2022/03

  • The University of Electro-Communications Graduate School of Informatics and Engineering Department of Computer and Network Engineering

    2017/04 - 2019/03

  • The University of Electro-Communications

    2013/04 - 2017/03

Committee Memberships 9

  • 電子情報通信学会 無線通信システム研究会 専門委員

    2026/06 - Present

  • 電子情報通信学会 通信ソサイエティ英文論文誌編集委員会 編集委員

    2025/06 - Present

  • 電子情報通信学会 信号処理研究会 専門委員

    2024/06 - Present

  • 第48回情報理論とその応用シンポジウム(SITA2025)プログラム委員会 委員

    2025/04 - 2025/11

  • Technical Program Committee for CCNC2025

    2024/03 - 2025/01

  • Technical Program Committee for CCNC2024

    2023/09 - 2024/01

  • Technical Program Committee for CCNC2023

    2022/04 - 2023/01

  • Technical Program Committee for VTC2022-Fall

    2022/07 - 2022/09

  • Technical Program Committee for VTC2022-Spring

    2022/01 - 2022/06

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Professional Memberships 2

  • 電子情報通信学会

  • IEEE

Research Interests 5

  • Wireless Communications

  • グラントフリーアクセス

  • 変復調

  • MIMO

  • Non-orthogonal multiple access

Research Areas 1

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

Awards 6

  1. The Telecommunications Advancement Foundation, The 40th Telecom System Students Award

    2025/03 Base Station-Driven PAPR Reduction Method Utilizing Null Space for MIMO-OFDM Systems With Amplify-and-Forward Relaying

  2. 電子情報通信学会通信ソサイエティ活動功労賞

    2024/09/10

  3. The 38th Telecom System Students Award

    2023/03 Blind Multiple Measurement Vector AMP Based on Expectation Maximization for Grant-Free NOMA

  4. 2019年SITA若手研究者論文賞

    2020/08 情報理論とその応用サブソサイエティ 近似メッセージ伝播法に基づいた低計算量グラントフリー非直交多元接続

  5. 2019年無線通信システム研究会奨励賞

    2020/05 電子情報通信学会 無線通信システム研究会 アップリンクグラントフリー非直交多元接続のためのキャリア周波数オフセット存在下におけるアクティブユーザ検出に関する一検討

  6. 2019年スマート無線研究会研究奨励賞

    2020/03 電子情報通信学会 スマート無線研究会 上り回線グラントフリー非直交多元接続のためのブースト近似メッセージ伝播法

Show all ︎Show 5

Papers 56

  1. Autonomous Decentralized User Association Method to Minimize File Drop Rate in Co-existing Networks with HAPS and Terrestrial BSs International-journal Peer-reviewed

    S. Ikeda, T. Hara, Y. Hokazono, S. Suyama, S. Nagata, K. Higuchi

    IEICE Transactions on Communications E109-B (12) 2026/12

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

    ISSN: 0916-8516

    eISSN: 1745-1345

  2. DPSK-Aided Design of ICA-Based Grant-Free Access Under Carrier Frequency Offsets International-journal Peer-reviewed

    M. Nakata, T. Hara, K. Higuchi

    IEICE Transactions on Communications E109-B (11) 2026/11

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

    ISSN: 0916-8516

    eISSN: 1745-1345

  3. Autonomous Decentralized User Association Method to Maximize System-Level Throughput Satisfaction Rate in Co-existing Networks with HAPS and Terrestrial BSs International-journal Peer-reviewed

    S. Ikeda, T. Hara, Y. Hokazono, S. Suyama, S. Nagata, K. Higuchi

    IEICE Transactions on Communications E109-B (8) 1082-1091 2026/08

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

    ISSN: 0916-8516

    eISSN: 1745-1345

  4. Distributed DQN-Based Frequency Block-Dependent Sleep Control of Base Stations for Improving Energy Efficiency under FTP Traffic Model International-journal Peer-reviewed

    R. Tanaka, T. Hara, S. Suyama, S. Nagata, K. Higuchi

    Proceedings of IEEE 103rd Vehicular Technology Conference (VTC2026-Spring) 2026/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

  5. Autonomous Decentralized TRP Group Selection Method to Maximize System Throughput in Downlink Distributed MIMO with Overlapped TRP Group Configuration International-journal Peer-reviewed

    Y. Yagi, K. Maeda, T. Hara, S. Suyama, S. Nagata, K. Higuchi

    IEICE Transactions on Communications E109-B (4) 715-725 2026/04

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

    DOI: 10.23919/transcom.2025EBT0007  

    ISSN: 0916-8516

    eISSN: 1745-1345

  6. Multiuser Diversity-Aware Autonomous Decentralized TRP Group Selection to Maximize System Throughput in Downlink Distributed MIMO International-journal Peer-reviewed

    Y. Yagi, T. Hara, S. Suyama, S. Nagata, K. Higuchi

    Proceedings of The 40th International Conference on Information Networking (ICOIN 2026) 738-743 2026/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/ICOIN68469.2026.11480497  

  7. Low-Complexity Channel Estimation for OTFS via Coordinate Descent Exploiting Delay-Domain Sparsity

    Masahiro Maruyama, Takanori Hara, Kenichi Higuchi

    IEEE Open Journal of the Communications Society 2026

    DOI: 10.1109/OJCOMS.2026.3687511  

  8. ICA-Based Grant-Free Access With DPSK-Aided Carrier Frequency Offset Compensation International-journal Peer-reviewed

    M. Nakata, T. Hara, K. Higuchi

    Proceedings of The 28th International Conference on Wireless Personal Multimedia Communications (WPMC2025) 2025/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

  9. Decentralized User Association Method to Minimize File Drop Rate in Co-existing Networks with HAPS and Terrestrial BSs International-journal Peer-reviewed

    S. Ikeda, T. Hara, Y. Hokazono, S. Suyama, S. Nagata, K. Higuchi

    Proceedings of The 28th International Conference on Wireless Personal Multimedia Communications (WPMC2025) 2025/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/WPMC67460.2025.11351088  

  10. Enhancing Power Saving Effect and Suppressing Latency Increase of C-DRX Operation Through Base Station Sleep Control International-journal Peer-reviewed

    Y. Shishido, T. Hara, K. Higuchi

    Proceedings of The 28th International Conference on Wireless Personal Multimedia Communications (WPMC2025) 2025/11

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

  11. Efficient Channel Estimation Utilizing Channel Sparsity in the Delay Domain for OTFS Systems International-journal Peer-reviewed

    M. Maruyama, T. Hara, K. Higuchi

    Proceedings of IEEE 101st Vehicular Technology Conference (VTC2025-Spring) Workshop (6GRAT) 2025/06

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

  12. Exploiting Low-Density Signal Structure via Approximate Message Passing With Side Information for Grant-Free NOMA Peer-reviewed

    Kohei Ueda, Takanori Hara, Koji Ishibashi

    IEEE Transactions on Wireless Communications 24 (4) 3305-3319 2025/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/twc.2025.3529935  

    ISSN: 1536-1276

    eISSN: 1558-2248

  13. Eigenvalue-Based Active User Enumeration for Grant-Free Access Under Carrier Frequency Offsets Peer-reviewed

    Takanori Hara

    IEEE Wireless Communications Letters 14 (4) 999-1003 2025/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lwc.2025.3529829  

    ISSN: 2162-2337

    eISSN: 2162-2345

  14. Inter-Network Interference Coordination Using Protected Band in Co-existing Networks with HAPS and Terrestrial BSs Peer-reviewed

    Takanori Hara

    Proceedings of the IEEE Wireless Communications and Networking Conference (WCNC) 2025/03

    DOI: 10.1109/WCNC61545.2025.10978777  

  15. Differential Modulation Based Non-Coherent Grant-Free NOMA Under Timing Offsets Peer-reviewed

    Takanori Hara

    Proceedings of the IEEE Wireless Communications and Networking Conference (WCNC) 2025/03

    DOI: 10.1109/WCNC61545.2025.10978582  

  16. Adaptive Interference Restriction Among Spatial Streams Based on Difference in Singular Values for PAPR Reduction in Uplink Eigenmode Massive MIMO Transmission Peer-reviewed

    Yuta Abekura, Takanori Hara, Satoshi Suyama, Satoshi Nagata, Kenichi Higuchi

    IEEE Access 13 21520-21532 2025

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/access.2025.3534783  

    eISSN: 2169-3536

  17. Decentralized User Association Method to Maximize System-Level Throughput Satisfaction Rate in Co-existing Networks with HAPS and Terrestrial BSs Peer-reviewed

    Shoki Ikeda, Takanori Hara, Yuki Hokazono, Satoshi Suyama, Satoshi Nagata, Kenichi Higuchi

    2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 1-6 2024/10/07

    Publisher: IEEE

    DOI: 10.1109/vtc2024-fall63153.2024.10757820  

  18. Beam Selection Method Based on Angle-Domain Adaptive Beam Grouping for Massive MIMO Analog Beamforming Using NOMA in Cellular Downlink Peer-reviewed

    Azusa Matsumoto, Nobuhide Nonaka, Takanori Hara, Kenichi Higuchi

    2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 1-6 2024/10/07

    Publisher: IEEE

    DOI: 10.1109/vtc2024-fall63153.2024.10757611  

  19. Autonomous Decentralized TRP Group Selection and Bandwidth Allocation in Downlink Distributed MIMO with Overlapped TRP Group Configuration Peer-reviewed

    Yuta Yagi, Takanori Hara, Satoshi Suyama, Satoshi Nagata, Kenichi Higuchi

    2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 1-6 2024/10/07

    Publisher: IEEE

    DOI: 10.1109/vtc2024-fall63153.2024.10757973  

  20. Autonomous Decentralized TRP Group Selection to Maximize System Throughput in Downlink Distributed MIMO System Peer-reviewed

    Koki Maeda, Takanori Hara, Satoshi Suyama, Satoshi Nagata, Kenichi Higuchi

    2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 1-5 2024/10/07

    Publisher: IEEE

    DOI: 10.1109/vtc2024-fall63153.2024.10757481  

  21. Distributed DQN-Based Frequency Block-Dependent Sleep Control of Base Stations for Improving Energy Efficiency Both in Up and Downlinks Peer-reviewed

    Yuma Shishido, Takanori Hara, Satoshi Suyama, Satoshi Nagata, Kenichi Higuchi

    2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 1-7 2024/10/07

    Publisher: IEEE

    DOI: 10.1109/vtc2024-fall63153.2024.10757690  

  22. PAPR Reduction Using Average Transmit Signal Power Difference Among Transmit Antennas for Massive MIMO-OFDM with Uniform Planar Array Peer-reviewed

    Soma Taguchi, Takanori Hara, Satoshi Suyama, Satoshi Nagata, Kenichi Higuchi

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

    Publisher: IEEE

    DOI: 10.1109/vtc2024-spring62846.2024.10683460  

  23. PAPR Reduction Method Based on Commonly Reserved Tones Among Multiple Users in FDMA Uplink Peer-reviewed

    Ryusei Yamazaki, Takanori Hara, Satoshi Suyama, Satoshi Nagata, Kenichi Higuchi

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

    Publisher: IEEE

    DOI: 10.1109/vtc2024-spring62846.2024.10683440  

  24. Highly-Efficient Low-Latency Scheduling Method in Round-Trip Communication for Feedback Control Peer-reviewed

    Ryotaro Iizuka, Takanori Hara, Yasuaki Yuda, Kenichi Higuchi

    2024 IEEE 99th Vehicular Technology Conference (VTC2024-Spring) 1-6 2024/06/24

    Publisher: IEEE

    DOI: 10.1109/vtc2024-spring62846.2024.10683631  

  25. Peak Cancellation Signal-Based Parallel PAPR Reduction Method Using Low-Dimensional Null Space in Massive MIMO-OFDM Peer-reviewed

    Jun Saito, Takanori Hara, Kenichi Higuchi

    2024 International Conference on Computing, Networking and Communications (ICNC) 361-365 2024/02/19

    Publisher: IEEE

    DOI: 10.1109/icnc59896.2024.10556076  

  26. Transmitter Filtering-aided Sparse Activity Detection for TDD-based Random Access Peer-reviewed

    Hiroki Fujimoto, Takanori Hara, Kenichi Higuchi

    2024 International Conference on Computing, Networking and Communications (ICNC) 366-370 2024/02/19

    Publisher: IEEE

    DOI: 10.1109/icnc59896.2024.10556248  

  27. Throughput maximization-based AP clustering methods in downlink cell-free MIMO under partial CSI condition Peer-reviewed

    Daisuke Ishii, Takanori Hara, Kenichi Higuchi

    IEICE Transactions on Communications 1-10 2024

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.23919/transcom.2023ebt0008  

    ISSN: 1745-1345

  28. Efficient Parallel PAPR Reduction Method Using Null-Constrained Peak Cancellation Signal for Massive MIMO-OFDM Systems Peer-reviewed

    Jun Saito, Takanori Hara, Kenichi Higuchi

    IEEE Open Journal of the Communications Society 5 3544-3555 2024

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/ojcoms.2024.3406819  

    eISSN: 2644-125X

  29. Base Station-Driven PAPR Reduction Method Utilizing Null Space for MIMO-OFDM Systems With Amplify-and-Forward Relaying Peer-reviewed

    Asuka Kakehashi, Takanori Hara, Kenichi Higuchi

    IEEE Access 12 24714-24724 2024

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/access.2024.3365702  

    eISSN: 2169-3536

  30. NOMA-Based Highly-Efficient Low-Latency HARQ with Inter-Base Station Cooperation for URLLC Peer-reviewed

    Ryota KOBAYASHI, Takanori HARA, Yasuaki YUDA, Kenichi HIGUCHI

    IEICE Transactions on Communications E106.B (11) 1219-1227 2023/11/01

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1587/transcom.2023ebt0005  

    ISSN: 0916-8516

    eISSN: 1745-1345

  31. Integration of Index and Differential Modulation for Non-coherent Grant-free NOMA Peer-reviewed

    Eiji Yoshimura, Takanori Hara, Kenichi Higuchi

    2023 57th Asilomar Conference on Signals, Systems, and Computers 192-196 2023/10/29

    Publisher: IEEE

    DOI: 10.1109/ieeeconf59524.2023.10477037  

  32. Low-Complexity User-Centric AP Clustering Method in Downlink Cell-Free MIMO with Regularized ZF-Based Beamforming Peer-reviewed

    Hiroki Kato, Takanori Hara, Satoshi Suyama, Satoshi Nagata, Kenichi Higuchi

    2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall) 1-6 2023/10/10

    Publisher: IEEE

    DOI: 10.1109/vtc2023-fall60731.2023.10333421  

  33. Energy-Efficient Frequency Block-Dependent Base Station Sleep Control Based on a Decentralized Probabilistic Approach Peer-reviewed

    Hiroya Kuwahara, Takanori Hara, Yuto Muroki, Satoshi Nagata, Kenichi Higuchi

    2023 IEEE 98th Vehicular Technology Conference (VTC2023-Fall) 2023/10/10

    Publisher: IEEE

    DOI: 10.1109/vtc2023-fall60731.2023.10333748  

  34. Clustering Method in Downlink Cell-Free MIMO Using Layered Partially Non-orthogonal ZF-Based Beamforming Peer-reviewed

    Daisuke Ishii, Takanori Hara, Nobuhide Nonaka, Kenichi Higuchi

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

    Publisher: IEEE

    DOI: 10.1109/vtc2023-spring57618.2023.10199306  

  35. User-Centric Design of Millimeter Wave Communications for Beyond 5G and 6G Invited Peer-reviewed

    Koji ISHIBASHI, Takanori HARA, Sota UCHIMURA, Tetsuya IYE, Yoshimi FUJII, Takahide MURAKAMI, Hiroyuki SHINBO

    IEICE Transactions on Communications E105.B (10) 1117-1129 2022/10/01

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

    DOI: 10.1587/transcom.2021mei0002  

    ISSN: 0916-8516 1745-1345

  36. Iterative Activity Detection and Carrier Frequency Offset Estimation for Grant-Free NOMA Peer-reviewed

    Kohei Ueda, Takanori Hara, Koji Ishibashi

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

    Publisher: IEEE

    DOI: 10.1109/pimrc54779.2022.9977720  

  37. Repetition-Based NOMA-HARQ with Adaptive Termination for URLLC Peer-reviewed

    Go Takita, Takanori Hara, Yasuaki Yuda, Kenichi Higuchi

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

    Publisher: IEEE

    DOI: 10.1109/vtc2022-fall57202.2022.10013081  

  38. Autonomous Decentralized User Association Method to Maximize Integrated System Throughput for Multi-service Coexistence Peer-reviewed

    Kazuma Matsumoto, Takanori Hara, Yasuaki Yuda, Kenichi Higuchi

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

    Publisher: IEEE

    DOI: 10.1109/vtc2022-fall57202.2022.10012959  

  39. HARQ Using Hierarchical Tree-Structured Random Access Identifiers with Random Retransmission Time Back-Off in NOMA-Based Random Access Peer-reviewed

    Katsuya Yanai, Takanori Hara, Nobuhide Nonaka, Kenichi Higuchi

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

    Publisher: IEEE

    DOI: 10.1109/vtc2022-fall57202.2022.10012757  

  40. Blind Multiple Measurement Vector AMP Based on Expectation Maximization for Grant-Free NOMA Peer-reviewed

    Takanori Hara, Koji Ishibashi

    IEEE Wireless Communications Letters 11 (6) 1201-1205 2022/06

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

    DOI: 10.1109/LWC.2022.3161100  

  41. Grant-Free NOMA Using Time-Delay Domain for Low-Latency Massive Access over MIMO-OFDM Peer-reviewed

    Takanori Hara, Hiroki Iimori, Koji Ishibashi

    ICC 2022 - IEEE International Conference on Communications 2022/05/16

    Publisher: IEEE

    DOI: 10.1109/icc45855.2022.9839108  

  42. Hyperparameter-Free Receiver for Grant-Free NOMA Systems With MIMO-OFDM Peer-reviewed

    Takanori Hara, Hiroki Iimori, Koji Ishibashi

    IEEE Wireless Communications Letters 10 (4) 810-814 2021/04

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/lwc.2020.3045159  

    ISSN: 2162-2337

    eISSN: 2162-2345

  43. Robust Symbol Detection in Large-Scale Overloaded NOMA Systems Peer-reviewed

    Hiroki Iimori, Giuseppe Thadeu Freitas De Abreu, Takanori Hara, Koji Ishibashi, Razvan-Andrei Stoica, David Gonzalez G., Osvaldo Gonsa

    IEEE Open Journal of the Communications Society 2 512-533 2021

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI: 10.1109/ojcoms.2021.3064983  

    eISSN: 2644-125X

  44. A Stochastic Gradient Descent Approach for Hybrid mmWave Beamforming With Blockage and CSI-Error Robustness Peer-reviewed

    Hiroki Iimori, Giuseppe Thadeu Freitas De Abreu, Omid Taghizadeh, Razvan-Andrei Stoica, Takanori Hara, Koji Ishibashi

    IEEE Access 9 74471-74487 2021

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

    DOI: 10.1109/ACCESS.2021.3079508  

  45. Ambient OFDM Pilot-Aided Backscatter Communications: Concept and Design Peer-reviewed

    Takanori Hara, Ryuhei Takahashi, Koji Ishibashi

    IEEE Access 9 89210-89221 2021

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

    DOI: 10.1109/ACCESS.2021.3091183  

    ISSN: 2169-3536

  46. Packet Aggregation Based on Encryption-Then-Compression for Highly Efficient Multi-Hop Transmission Peer-reviewed

    Ryota Yatsu, Takanori Hara, Koji Ishibashi, Sota Tsuchiya, Hideki Endo

    2020 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC) 2020/12

  47. Stochastic Learning Robust Beamforming for Millimeter-Wave Systems With Path Blockage

    Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Omid Taghizadeh, Razvan-Andrei Stoica, Takanori Hara, Koji Ishibashi

    IEEE Wireless Communications Letters 9 (9) 1557-1561 2020/09

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

    DOI: 10.1109/LWC.2020.2997366  

  48. Activity Detection for Uplink Grant-Free NOMA in the Presence of Carrier Frequency Offsets Peer-reviewed

    Takanori Hara, Hiroki Iimori, Koji Ishibashi

    2020 IEEE International Conference on Communications Workshops (ICC Workshops) 2020/06

    Publisher: IEEE

    DOI: 10.1109/iccworkshops49005.2020.9145061  

  49. Research Project to Realize Various High-reliability Communications in Advanced 5G Network Peer-reviewed

    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) 2020/05

    Publisher: IEEE

    DOI: 10.1109/wcnc45663.2020.9120477  

  50. Grant-Free NOMA Using Approximate Message Passing with Multi-Measurement Vector Peer-reviewed

    Takanori Hara, Koji Ishibashi

    2020 International Conference on Information Networking (ICOIN) 2020/01

    Publisher: IEEE

    DOI: 10.1109/icoin48656.2020.9016454  

  51. Low Complexity Uplink Grant-Free NOMA Based on Boosted Approximate Message Passing Peer-reviewed

    Takanori Hara, Koji Ishibashi

    2019 53rd Asilomar Conference on Signals, Systems, and Computers 2019/11

    Publisher: IEEE

    DOI: 10.1109/ieeeconf44664.2019.9048976  

  52. On the Sum-Rate Capacity and Spectral Efficiency Gains of Massively Concurrent NOMA Systems Peer-reviewed

    Takanori Hara, Razvan-Andrei Stoica, Koji Ishibashi, Giuseppe Thadeu Freitas de Abreu

    2019 IEEE Wireless Communications and Networking Conference (WCNC) 2019/04

    Publisher: IEEE

    DOI: 10.1109/wcnc.2019.8885768  

  53. Grant-Free Non-Orthogonal Multiple Access With Multiple-Antenna Base Station and Its Efficient Receiver Design Peer-reviewed

    Takanori Hara, Koji Ishibashi

    IEEE Access 7 175717-175726 2019

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

    DOI: 10.1109/ACCESS.2019.2956817  

  54. Massively Concurrent Non-Orthogonal Multiple Access for 5G Networks and Beyond Peer-reviewed

    Razvan-Andrei Stoica, Giuseppe Thadeu Freitas De Abreu, Takanori Hara, Koji Ishibashi

    IEEE Access 7 82080-82100 2019

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

    DOI: 10.1109/access.2019.2923646  

    ISSN: 2169-3536

  55. Low-Complexity Generator Polynomial Search for Turbo Trellis-Coded Spatial Modulation Using Symbol-based EXIT Charts Peer-reviewed

    Takanori Hara, Koji Ishibashi, Soon Xin Ng, Lajos Hanzo

    2018 IEEE 10th International Symposium on Turbo Codes & Iterative Information Processing (ISTC) 2018/12

    Publisher: IEEE

    DOI: 10.1109/istc.2018.8625283  

  56. Aggregate-Compression-Aided Subcarrier IQ Index Modulation Peer-reviewed

    Kazuya Ohira, Takanori Hara, Koji Ishibashi

    2018 15th Workshop on Positioning, Navigation and Communications (WPNC) 2018/10

    Publisher: IEEE

    DOI: 10.1109/wpnc.2018.8555776  

Show all ︎Show first 5

Presentations 138

  1. Inter-Network Interference Coordination Using Protected Band in Co-existing Networks with HAPS and Terrestrial BSs International-presentation

    R. Tsutsui T. Hara Y. Hokazono S. Suyama S. Nagata K. Higuchi

    IEEE Wireless Communications and Networking Conference 2025 2025/03/24

  2. Differential Modulation Based Non-Coherent Grant-Free NOMA Under Timing Offsets International-presentation

    E. Yoshimura T. Hara K. Ueda K. Ishibashi K. Higuchi

    IEEE Wireless Communications and Networking Conference 2025 2025/03/24

  3. 搬送波周波数オフセット存在下におけるグラントフリー非直交多元接続のためのPlug-and-Playに基づく受信機設計

    上田康平 原郁紀 石橋功至

    無線通信システム研究会 2025/03/05

  4. FTPトラヒックモデルにおける電力効率増大のための基地局周波数ブロック毎スリープ制御の検討

    田中諒 原郁紀 樋口健一

    無線通信システム研究会 2025/03/05

  5. ユーザ毎送信局群選択を伴う分散MIMOにおけるスケーラブルなユーザスケジューリング法の検討

    加藤拓輝 原郁紀 樋口健一

    無線通信システム研究会 2024/12/19

  6. OTFSにおけるチャネルの遅延スパース性を活用した効率的なチャネル推定法の一検討

    丸山真弘 原郁紀 樋口健一

    無線通信システム研究会 2024/12/19

  7. 搬送波周波数オフセット存在下のグラントフリーアクセスにおける短パイロットに基づくアクティブユーザ数推定

    原郁紀

    第47回情報理論とその応用シンポジウム 2024/12/10

  8. Distributed DQN-Based Frequency Block-Dependent Sleep Control of Base Stations for Improving Energy Efficiency Both in Up and Downlinks International-presentation

    Y. Shishido T. Hara S. Suyama S. Nagata K. Higuchi

    IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 2024/10/07

  9. Decentralized User Association Method to Maximize System-Level Throughput Satisfaction Rate in Co-existing Networks with HAPS and Terrestrial BSs International-presentation

    S. Ikeda T. Hara Y. Hokazono S. Suyama S. Nagata K. Higuchi

    IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 2024/10/07

  10. Beam Selection Method Based on Angle-Domain Adaptive Beam Grouping for Massive MIMO Analog Beamforming Using NOMA in Cellular Downlink International-presentation

    A. Matsumoto N. Nonaka T. Hara K. Higuchi

    IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 2024/10/07

  11. Autonomous Decentralized TRP Group Selection to Maximize System Throughput in Downlink Distributed MIMO System International-presentation

    K. Maeda T. Hara S. Suyama S. Nagata K. Higuchi

    IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 2024/10/07

  12. Autonomous Decentralized TRP Group Selection and Bandwidth Allocation in Downlink Distributed MIMO with Overlapped TRP Group Configuration International-presentation

    Y. Yagi T. Hara S. Suyama S. Nagata K. Higuchi

    IEEE 100th Vehicular Technology Conference (VTC2024-Fall) 2024/10/07

  13. 搬送波周波数オフセット存在下のグラントフリーアクセスのための共通パイロット系列を用いたアクティブユーザ数推定に関する一検討

    原郁紀

    無線通信システム研究会 2024/08/29

  14. PAPR Reduction Using Average Transmit Signal Power Difference Among Transmit Antennas for Massive MIMO-OFDM with Uniform Planar Array International-presentation

    S. Taguchi T. Hara S. Suyama S. Nagata K. Higuchi

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

  15. PAPR Reduction Method Based on Commonly Reserved Tones Among Multiple Users in FDMA Uplink International-presentation

    R. Yamazaki T. Hara S. Suyama S. Nagata K. Higuchi

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

  16. Highly-Efficient Low-Latency Scheduling Method in Round-Trip Communication for Feedback Control International-presentation

    R. Iizuka T. Hara Y. Yuda K. Higuchi

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

  17. 独立成分分析に基づくグラントフリーアクセスのための短パイロット構造を用いたアクティブユーザ検出に関する一検討

    中田光俊 原郁紀 樋口健一

    無線通信システム研究会 2024/06/19

  18. 地上基地局共存ネットワークにおけるシステムスループット満足率を最大化する自律分散型接続セル選択法

    池田翔幾 原郁紀 外園悠貴 須山聡 永田 聡 樋口健一

    無線通信システム研究会 2024/06/19

  19. 分数ドップラー環境下におけるOTFS伝送のためのFISTAに基づくチャネル推定に関する一検討

    丸山真弘 原郁紀 樋口健一

    無線通信システム研究会 2024/06/19

  20. 分散型DQNに基づく上下リンクの電力効率を考慮した周波数ブロック毎基地局スリープ制御法の検討

    宍戸悠真 原郁紀 須山聡 永田 聡 樋口健一

    無線通信システム研究会 2024/06/19

  21. 分散MIMO下りリンクにおけるシステムスループットを最大化する自律分散制御型接続送信局群選択法

    前田航輝 原郁紀 須山聡 永田 聡 樋口健一

    無線通信システム研究会 2024/06/19

  22. 上りリンク固有モードMassive MIMO伝送における空間チャネル間の特異値差に基づく適応干渉制御を適用したPAPR抑圧法

    阿部倉優太 原郁紀 須山聡 永田 聡 樋口健一

    無線通信システム研究会 2024/06/19

  23. タイミングオフセット存在下における差動位相偏移変調を用いたグラントフリーNOMA

    吉村瑛治 原郁紀 上田康平 石橋功至 樋口健一

    無線通信システム研究会 2024/06/19

  24. オーバラップ型送信局群構成を用いた分散MIMO下りリンクにおける自律分散制御型送信局群間帯域配分と接続送信局群選択法

    八木雄太 原郁紀 須山聡 永田 聡 樋口健一

    無線通信システム研究会 2024/06/19

  25. NOMAを用いた下りリンクMassive MIMOアナログビームフォーミングにおける水平・垂直方向角度次元適応ビームグループ化に基づくビーム選択法

    松元梓 野中信秀 原郁紀 樋口健一

    無線通信システム研究会 2024/06/19

  26. HAPS・地上基地局共存ネットワークにおける保護帯域を用いたネットワーク間干渉コーディネーション法

    筒井涼太郎 原郁紀 外園悠貴 須山聡 永田 聡 樋口健一

    無線通信システム研究会 2024/06/19

  27. URLLCを実現するNOMAに基づく高効率かつ低遅延な基地局間連携HARQ法

    樋口健一 小林亮太 原郁紀 湯田泰明

    無線通信システム研究会 2024/05/30

  28. 搬送波周波数オフセット存在下におけるグラントフリーNOMAのための2段階アクティブユーザ検出に関する検討

    加藤大喜 原郁紀 樋口健一

    電子情報通信学会総合大会 2024/03/04

  29. フェージング環境を考慮したマルチサービスモデルにおける統合システムスループットを最大化する自律分散型接続セル選択法の検討

    松本和真 原郁紀 湯田泰明 樋口健一

    電子情報通信学会総合大会 2024/03/04

  30. Massive MIMO-OFDM伝送におけるチャネルのヌル空間を活用したPAPR抑圧の並列処理による演算量削減に関する一検討

    斉藤純 原郁紀 樋口健一

    電子情報通信学会総合大会 2024/03/04

  31. HAPSを考慮したHetNetにおけるシステムスループットを最大化する自律分散型接続セル選択法の検討

    池田翔幾 原郁紀 樋口健一

    電子情報通信学会総合大会 2024/03/04

  32. Transmitter Filtering-aided Sparse Activity Detection for TDD-based Random Access International-presentation

    H. Fujimoto T. Hara K. Higuchi

    IEEE International Conference on Computing, Networking and Communications 2024 2024/02/19

  33. Peak Cancellation Signal-Based Parallel PAPR Reduction Method Using Low-Dimensional Null Space in Massive MIMO-OFDM International-presentation

    J. Saito T. Hara K. Higuchi

    IEEE International Conference on Computing, Networking and Communications 2024 2024/02/19

  34. Integration of Index and Differential Modulation for Non-coherent Grant-free NOMA International-presentation

    E. Yoshimura T. Hara K. Higuchi

    The 57th Asilomar Conference on Signals, Systems, and Computers 2023/10/29

  35. Low-Complexity User-Centric AP Clustering Method in Downlink Cell-Free MIMO with Regularized ZF-Based Beamforming International-presentation

    H. Kato T. Hara S. Suyama S. Nagata K. Higuchi

    IEEE 98th Vehicular Technology Conference (VTC2023-Spring) 2023/10/10

  36. Energy-Efficient Frequency Block-Dependent Base Station Sleep Control Based on a Decentralized Probabilistic Approach International-presentation

    H. Kuwahara T. Hara Y. Muroki S. Nagata K. Higuchi

    IEEE 98th Vehicular Technology Conference (VTC2023-Spring) 2023/10/10

  37. 規格化ゼロフォーシング BF を用いた下りリンク分散 MIMO における平均パス利得に基づくユーザ毎送信局群選択法の一検討

    加藤拓輝 原郁紀 須山聡 永田 聡 樋口健一

    電子情報通信学会ソサイエティ大会 2023/09/12

  38. インデックス変調に基づくチャネル推定不要なグラントフリー NOMA

    吉村瑛治 原郁紀 樋口健一

    電子情報通信学会ソサイエティ大会 2023/09/12

  39. Practical Grant-Free NOMA Based on Low-Density Structured OFDM

    Kohei Ueda, Takanori Hara, Koji Ishibashi

    IEEE Communication Theory Workshop 2023 2023/07

  40. Completely-Blind Efficient Receiver for Asynchronous Massive Grant-Free NOMA

    Takanori Hara, Koji Ishibashi

    IEEE Communication Theory Workshop 2023 2023/07

  41. Clustering Method in Downlink Cell-Free MIMO Using Layered Partially Non-orthogonal ZF-Based Beamforming International-presentation

    D. Ishii T. Hara N. Nonaka K. Higuchi

    IEEE 97th Vehicular Technology Conference (VTC2023-Spring) 2023/06/20

  42. 周波数選択性チャネルのヌル空間を活用したAF型リレー MIMO-OFDM信号のPAPR抑圧法

    梯明日翔 原郁紀 須山聡 樋口健一

    電子情報通信学会総合大会 2023/03/07

  43. 下りリンクセルフリー MIMOにおける平均パス利得に基づく低演算量型ユーザ毎送信局群選択法の一検討

    加藤拓輝 原郁紀 須山聡 樋口健一

    電子情報通信学会総合大会 2023/03/07

  44. A Study on Avdanced Peak Cancellation Signal Generation for PAPR Reduction Using Null Space in MIMO Channel for MIMO-OFDM Signals

    斉藤純, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  45. PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Signals at Multiple-Antenna AF Relay Station Under Frequency-Selective Fading Channel

    梯明日翔, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  46. Multi-agent DQN-Based Activation Control of Base Stations Utilizing Activation States of Neighbor Base Stations

    加藤大喜, 原郁紀, 室城勇人, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  47. Investigations on Low-Complexity User-Specific TRP Selection Method in Downlink Cell-Free MIMO with Partial CSI

    加藤拓輝, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  48. A Study on Transmission Power Control in NOMA-Based Random Access Utilizing Hierarchically Structured Random Access Identifiers

    淺田萌, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会大会講演論文集(CD-ROM) 2023

  49. A Study on Adaptive Control of Minimum Power Threshold in PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Signals

    斉藤純, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会大会講演論文集(CD-ROM) 2023

  50. Activation Control of Base Stations Based on Multi-agent DQN Utilizing Activation States of Neighbor Base Stations

    加藤大喜, 原郁紀, 室城勇人, 樋口健一

    電子情報通信学会大会講演論文集(CD-ROM) 2023

  51. A Study on Grant-Free Access Based on Approximate Message Passing in the Presence of Timing Offsets

    原郁紀

    電子情報通信学会大会講演論文集(CD-ROM) 2023

  52. A Study on PAPR Reduction Method Utilizing Difference in Eigenvalues Among Spatial Channels in Uplink Eigenmode Massive MIMO Transmission

    阿部倉優太, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会大会講演論文集(CD-ROM) 2023

  53. PAPR Reduction Method Using Null Space in Frequency-Selective Faded MIMO Channel for AF-Based Relaying MIMO-OFDM Signals

    梯明日翔, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会大会講演論文集(CD-ROM) 2023

  54. A Study on Path Gain-Based Low-Complexity User-Specific TRP Selection Method in Downlink Cell-Free MIMO

    加藤拓輝, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会大会講演論文集(CD-ROM) 2023

  55. NOMA-Based Highly-Efficient Low-Latency HARQ Method with Inter-Base Station Cooperation for URLLC

    小林亮太, 原郁紀, 湯田泰明, 樋口健一

    電子情報通信学会大会講演論文集(CD-ROM) 2023

  56. Investigations on Low-Complexity User-Specific TRP Selection Method in Downlink Distributed MIMO with Regularized ZF-Based Beamforming

    加藤拓輝, 原郁紀, 須山聡, 永田聡, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  57. Blind Active User Detection for Grant-Free Access in the Presence of Timing Offsets

    原郁紀

    電子情報通信学会技術研究報告(Web) 2023

  58. Investigations on Non-coherent Transmission Scheme for Grant-free NOMA

    吉村瑛治, 原郁紀, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  59. Bayesian Receiver Design for Grant-Free NOMA Based on Low-Density Structured OFDM

    上田康平, 原郁紀, 石橋功至

    電子情報通信学会技術研究報告(Web) 2023

  60. NOMA-HARQ with Adaptive Termination Based on Early Decision Using Channel State Information for URLLC

    滝田豪, 原郁紀, 湯田泰明, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  61. Scalable Clustering Method in Downlink Cell-Free MIMO Using Layered Partially Non-orthogonal ZF-Based Beamforming

    石井大介, 原郁紀, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  62. Compressed Sensing-Based Active User Detection for Random Access with Transmitter Filtering and Channel Identifier Linked Receiver Beamforming

    藤本大輝, 原郁紀, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  63. Approximate Message Passing Based on Birth-Death Drift Process for Grant-Free NOMA With Low-Density Structured OFDM

    上田康平, 原郁紀, 石橋功至

    情報理論とその応用シンポジウム予稿集(CD-ROM) 2023

  64. Investigations on Low-Complexity User-Specific TRP Selection Method in Downlink Distributed MIMO with Channel Estimation Errors

    加藤拓輝, 原郁紀, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  65. Peak Cancellation Signal-Based Parallel PAPR Reducton Method Using Low-Dimensional Null Space in Massive MIMO-OFDM Transmission

    斉藤純, 原郁紀, 樋口健一

    電子情報通信学会技術研究報告(Web) 2023

  66. Completely-Blind Multiple Measurement Vector AMP for Massive Grant-Free NOMA

    Takanori Hara, Koji Ishibashi

    IEEE Communication Theory Workshop 2022 2022/10

  67. HARQ Using Hierarchical Tree-Structured Random Access Identifiers with Random Retransmission Time Back-Off in NOMA-Based Random Access; International-presentation

    K. Yanai T. Hara N. Nonaka K. Higuchi

    IEEE 96th Vehicular Technology Conference (VTC2022-Fall) 2022/09/26

  68. Autonomous Decentralized User Association Method to Maximize Integrated System Throughput for Multi-service Coexistence International-presentation

    K. Matsumoto T. Hara Y. Yuda K. Higuchi

    IEEE 96th Vehicular Technology Conference (VTC2022-Fall) 2022/09/26

  69. Iterative Activity Detection and Carrier Frequency Offset Estimation for Grant-Free NOMA International-presentation

    K. Ueda T. Hara K. Ishibashi

    IEEE 33rd International Symposium on Personal; Indoor and Mobile Radio Communications 2022/09/12

  70. Grant-Free NOMA Using Time-Delay Domain for Low-Latency Massive Access over MIMO-OFDM International-presentation

    T. Hara H. Iimori K. Ishibashi

    IEEE International Conference on Communications 2022 2022/05/16

  71. Complexity-Reduced Channel Estimation Using Comb-Shaped Preamble for Random Access with Transmitter Filtering and Channel Identifier Linked Receiver Beamforming

    BOLOTOV Andrey, 原郁紀, 樋口健一

    電子情報通信学会技術研究報告(Web) 2022

  72. Autonomous Decentralized User Association Method to Maximize Integrated System Throughput Considering Coexistence of Multiple Services

    松本和真, 原郁紀, 湯田泰明, 樋口健一

    電子情報通信学会技術研究報告(Web) 2022

  73. Repetition-Based NOMA-HARQ with Adaptive Termination for URLLC

    滝田豪, 原郁紀, 湯田泰明, 樋口健一

    電子情報通信学会技術研究報告(Web) 2022

  74. Iterative Active User Detection for Grant-Free Non-Orthogonal Multiple Access in The Presence of Carrier Frequency Offsets

    上田康平, 原郁紀, 石橋功至

    電子情報通信学会技術研究報告(Web) 2022

  75. Investigations on TRP Clustering Method in Downlink Cell-Free MIMO Using Layered Partially Non-orthogonal ZF-Based Beamforming

    石井大介, 原郁紀, 野中信秀, 樋口健一

    電子情報通信学会技術研究報告(Web) 2022

  76. HARQ Using Hierarchical Tree-Structured Random Access Channel Identifiers and Random Retransmission Time Back-Off in NOMA Based Random Access

    矢内克弥, 原郁紀, 野中信秀, 樋口健一

    電子情報通信学会技術研究報告(Web) 2022

  77. Approximate Message Passing for Efficient Grant-Free Access

    原郁紀

    電子情報通信学会技術研究報告(Web) 2022

  78. CFO Compensation Based on Expectation Maximization for Grant-Free NOMA with OFDM

    上田康平, 原郁紀, 石橋功至

    情報理論とその応用シンポジウム予稿集(CD-ROM) 2022

  79. Investigation of NOMA-Based Highly-Efficient Low-Latency HARQ Method with Inter-Base Station Cooperation for URLLC

    小林亮太, 原郁紀, 湯田泰明, 樋口健一

    電子情報通信学会技術研究報告(Web) 2022

  80. Investigation on Transmission Power Control in NOMA-Based Random Access with Hierarchically Structured Random Access Identifiers

    淺田萌, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会技術研究報告(Web) 2022

  81. Investigation of Advanced Transmitter Filtering Method for Random Access with Random Access Identifier Linked Receiver Beamforming

    内田昌吾, 原郁紀, 須山聡, 樋口健一

    電子情報通信学会技術研究報告(Web) 2022

  82. Blind Multiple Measurement Vector Approximate Message Passing for Grant-Free Access

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告(Web) 2022

  83. 畳み込み符号化Polar符号の繰り返し復号に関する一検討

    菅原諒 原郁紀 石橋功至

    電子情報通信学会総合大会 2021/03/09

  84. Grant-Free Non-Orthogonal Transmission for Low-Latency and Massive Connectivity

    原郁紀, 石橋功至

    電子情報通信学会大会講演論文集(CD-ROM) 2021

  85. A Study on Iterative Decoding of Polarization-Adjusted Convolutional Codes

    菅原諒, 原郁紀, 石橋功至

    電子情報通信学会大会講演論文集(CD-ROM) 2021

  86. Multiple Measurement Vector Approximate Message Passing Without Prior Information of Channels for Grant-Free Non-Orthogonal Multiple Access

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告(Web) 2021

  87. [奨励講演] 時間・周波数拡散を用いた大規模グラントフリー非直交多元接続

    原郁紀 石橋功至

    無線通信システム研究会 2020/12/17

  88. Packet Aggregation Based on Encryption-Then-Compression for Highly Efficient Multi-Hop Transmission International-presentation

    R. Yatsu T. Hara K. Ishibashi S. Tsuchiya H. Endo

    Asia-Pacific Signal and Information Processing Association Annual Summit and Conference 2020 (APSIPA ASC 2020) 2020/12/07

  89. Activity Detection for Uplink Grant-Free NOMA in the Presence of Carrier Frequency Offsets International-presentation

    T. Hara H. Iimori K. Ishibashi

    IEEE International Conference on Communications 2020 Workshop 2020/06/07

  90. Research Project to Realize Various High-reliability Communications in Advanced 5G Network International-presentation

    T. Murakami H. Shinbo Y. Tsukamoto S. Nanba Y. Kishi M. Tamai H. Yokoyama T. Hara K. Ishibashi K. Tsuda Y. Fujii F. Adachi K. Sakai M. Nakagawa Y. Seki T. Sotoyama

    IEEE Wireless Communications and Networking Conference 2020 2020/05/25

  91. 多様なサービス要求に応じた高信頼な高度4Gネットワーク制御技術の研究開発

    原郁紀 石橋功至

    無線通信システム研究会 2020/03/04

  92. Grant-Free NOMA Using Approximate Message Passing with Multi-Measurement Vector International-presentation

    T. Hara K. Ishibashi

    The 34th International Conference on Information Networking (ICOIN2020) 2020/01/07

  93. Active User Detection for Uplink Grant-Free Non-Orthogonal Multiple Access in The Presence of Carrier Frequency Offsets

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告 2020

  94. 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 2020

  95. Transmission Efficiency of Uplink Grant-Free Non-Orthogonal Multiple Access

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告 2020

  96. Generalization of Performance Analysis on OFDM Pilot-Aided Ambient Backscatter Communications

    原郁紀, 高橋龍平, 石橋功至

    電子情報通信学会技術研究報告(Web) 2020

  97. A Study on Non-Orthogonal Pilot Design for Grant-Free Multi-User Massive MIMO

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告(Web) 2020

  98. Massive Grant-Free Non-Orthogonal Multiple Access Utilizing Time and Frequency Spreading

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告(Web) 2020

  99. Hyperparameter-Free Receiver for OFDM-based Grant-Free Non-Orthogonal Multiple Access

    原郁紀, 飯盛寛貴, 石橋功至

    電子情報通信学会大会講演論文集(CD-ROM) 2020

  100. Low Complexity Uplink Grant-Free NOMA Based on Boosted Approximate Message Passing International-presentation

    T. Hara K. Ishibashi

    The 53rd Asilomar Conference on Signals; Systems; and Computers (Asilomar2019) 2019/11/03

  101. ベクトル近似メッセージ伝播法を用いたグラントフリー非直交多元接続の理論解析

    原郁紀 石橋功至

    無線通信システム研究会 2019/10/24

  102. On the Sum-Rate Capacity and Spectral Efficiency Gains of Massively Concurrent NOMA Systems International-presentation

    T. Hara R.-A. Stoica K. Ishibashi G. T. F. de Abreu

    IEEE Wireless Communications and Networking Conference 2019 2019/04/15

  103. Channel Estimation and Data Detection for Grant-Free Multiple Access Using Vector Approximate Message Passing

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告 2019

  104. Boosted Approximate Message Passing for Uplink Grant-Free Non-Orthogonal Multiple Access

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告 2019

  105. Generalized Boosted Approximate Message Passing for Uplink Grant-Free Non-Orthogonal Multiple Access

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告 2019

  106. 超低電力通信のためのOFDM既知信号を用いた遅延シフトキーイングとその最適復調法

    高橋龍平, 原郁紀, 石橋功至

    情報理論とその応用シンポジウム予稿集(CD-ROM) 2019

  107. 近似メッセージ伝播法に基づいた低計算量グラントフリー非直交多元接続

    原郁紀, 石橋功至

    情報理論とその応用シンポジウム予稿集(CD-ROM) 2019

  108. A Study on Low-Complexity Data Detection for Grant-Free Non-Orthogonal Multiple Access

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告 2019

  109. A Study on Active User Detection and Channel Estimation for Grant-Free Non-Orthogonal Multiple Access based on OFDM

    原郁紀, 石橋功至

    電子情報通信学会技術研究報告 2019

  110. Low-Complexity Generator Polynomial Search for Turbo Trellis-Coded Spatial Modulation Using Symbol-based EXIT Charts International-presentation

    T. Hara K. Ishibashi S. X. Ng L. Hanzo

    IEEE 10th International Symposium on Turbo Codes and Iterative Information Processing (IEEE ISTC'18) 2018/12/03

  111. Aggregate-Compression-Aided Subcarrier IQ Index Modulation International-presentation

    K. Ohira T. Hara K. Ishibashi

    IEEE Workshop on Positioning; Network; and Communications (IEEE WPNC'18) 2018/10/25

  112. Low-Complexity Code Search Method for Turbo Trellis-Coded Spatial Modulation Using Symbol-based EXIT Charts

    原郁紀, 石橋功至, HANZO Lajos

    電子情報通信学会技術研究報告 2018

  113. Aggregate-Compression-Aided Subcarrier IQ Index Modulation with Discreteness-Aware Approximate Message Passing

    大比良和哉, 原郁紀, 石橋功至

    電子情報通信学会技術研究報告 2018

  114. フレーム理論に基づく非直交多元接続方式のためのガウス確率伝播による低演算量復調法

    原郁紀, 石橋功至, STOICA Razvan-Andrei, ABREU Giuseppe

    情報理論とその応用シンポジウム予稿集(CD-ROM) 2018

  115. Construction Aに基づく非二元Repeat-Accumulate符号を用いた格子の構成に関する一検討

    原郁紀, 石橋功至

    電子情報通信学会大会講演論文集(CD-ROM) 2017

  116. 時間・周波数オフセット存在下における独立成分分析を用いたグラントフリーアクセスに関する一検討

    原 郁紀

    信学ソ大 2026/09

  117. Reconfigurable Reflectarray Antennaを搭載した低軌道衛星通信システムにおける通信効率向上のためのマルチビーム制御

    齋藤真毅, 原 郁紀, 橋田紘明, 川本雄一, 加藤寧, 吉田昴平, 有吉正行

    信学技報 2026/08

  118. 分散MIMO上りリンクにおけるシステムスループット最大化のための自律分散型接続受信局群選択法

    清水絢人, 原 郁紀, 須山 聡, 永田 聡, 樋口健一

    信学技報 2026/06

  119. 分数ドップラー環境下のOTFSにおける逐次パス推定に基づく低演算量チャネル推定法

    加納久嗣, 原 郁紀, 樋口健一

    信学技報 2026/06

  120. Multi-AP連携における端末間の空間相関を利用したチャネル状態フィードバック量の最適化に関する研究

    石川万里子, 原 郁紀, 橋田紘明, 川本雄一, 加藤寧, 浦部嘉夫, 本塚裕幸

    信学技報 2026/06

  121. マルチサービス環境下での HAPS・地上基地局共存ネットワークにおけるファイル伝送失敗率を最小化する自律分散型接続セル選択法の検討

    池田翔幾, 原 郁紀, 外園悠貴, 須山 聡, 永田 聡, 樋口健一

    信学総大 2026/03

  122. OTFS 伝送における低演算量なチャネル推定法の一検討

    加納久嗣, 原 郁紀, 樋口健一

    信学総大 2026/03

  123. FTPトラヒックモデルにおける置換不変状態入力構成を用いた自律分散型基地局周波数ブロック毎スリープ制御に関する一検討

    田中 諒, 原 郁紀, 樋口健一

    信学総大 2026/03

  124. 周辺基地局スリープ情報を活用した分散型DQN に基づく周波数ブロック毎基地局スリープ制御法の検討

    宍戸悠真, 原 郁紀, 樋口健一

    信学総大 2026/03

  125. マルチユーザダイバーシチ効果を考慮した下りリンク分散MIMO における自律分散型接続TRP群選択法の検討

    八木雄太, 原 郁紀, 須山 聡, 永田 聡, 樋口健一

    信学総大 2026/03

  126. 多段電力制御によるGrant-Free NOMAのAoI改善の検討

    中田光俊, 原 郁紀, 樋口健一

    信学総大 2026/03

  127. マルチユーザダイバーシチに対応した自律分散型接続TRP群選択による下りリンク分散MIMOのシステムスループット最大化

    八木雄太, 原 郁紀, 須山 聡, 永田 聡, 樋口健一

    信学技報 2026/01

  128. HAPS・地上基地局共存ネットワークにおけるファイル伝送失敗率を最小化する自律分散型接続セル選択法

    池田翔幾, 原 郁紀, 外園悠貴, 須山 聡, 永田 聡, 樋口健一

    信学技報 2025/12

  129. 基地局スリープ制御によるC-DRX制御の省電力効果の向上と遅延増加の抑制

    宍戸悠真, 原 郁紀, 樋口健一

    信学技報 2025/12

  130. 独立成分分析を用いたグラントフリーアクセスにおける差動位相偏移変調に基づく搬送波周波数オフセット補償法

    中田光俊, 原 郁紀, 樋口健一

    信学ソ大 2025/09

  131. 分散MIMO下りリンクにおけるシステムスループット満足率を最大化する自律分散型接続送信局群選択法

    吉野一騎, 原 郁紀, 須山 聡, 立石貴一, 永田 聡, 樋口健一

    信学技報 2025/06

  132. 分散MIMO上りリンクにおけるシステムスループットを最大化する自律分散制御型接続受信局群選択法

    清水絢人, 原 郁紀, 須山 聡, 立石貴一, 永田 聡, 樋口健一

    信学技報 2025/06

  133. FTPトラヒックモデルにおける電力効率増大のための確率的周波数ブロック毎基地局スリープ制御の検討

    田中 諒, 原 郁紀, 須山 聡, 永田 聡, 樋口健一

    信学技報 2025/06

  134. 分散MIMO下りリンクにおける瞬時フェージングを考慮したシステムスループットを最大化する接続送信局群選択法

    矢田堀尚樹, 原 郁紀, 須山 聡, 立石貴一, 永田 聡, 樋口健一

    信学技報 2025/06

  135. 搬送波周波数オフセット存在下におけるグラントフリー非直交多元接続のためのPlug-and-Playに基づく受信機設計

    上田康平, 原 郁紀, 石橋功至

    信学技報 2025/05

  136. 電力効率増大のための分散型DQNに基づく基地局周波数ブロック毎スリープ制御法 Invited

    原 郁紀, 宍戸悠真, 田中 諒, 須山 聡, 永田 聡, 樋口健一

    信学技報 2025/05

  137. 低密度構造化OFDMを用いたグラントフリー非直交多元接続のためのPlug-and-Playに基づく受信機設計

    上田康平, 原 郁紀, 石橋功至

    信学技報 2025/03

  138. HAPS・地上基地局共存ネットワークにおけるシステムスループット満足率を最大化する自律分散型接続セル選択法

    池田翔幾, 原 郁紀, 外園悠貴, 須山 聡, 永田 聡, 樋口健一

    信学技報 2024/06

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Industrial Property Rights 1

  1. 通信プログラム、基地局および通信システム

    原 郁紀, 石橋功至

    Property Type: Patent

Research Projects 3

  1. 高速移動体通信の高度化に向けたOTFS伝送のための高効率スパース信号処理設計

    原 郁紀

    System: マツダ研究助成

    2025/12 - 2027/03

  2. 超多数IoTデバイス収容のためのチャネル推定不要なグラントフリー非直交多元接続

    原 郁紀

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究

    Institution: 東京理科大学

    2023/04/01 - 2026/03/31

  3. グラントフリー非直交多元接続における高精度な周波数オフセット補償法の開発

    原 郁紀

    System: 電気通信普及財団研究助成

    2023/04 - 2025/03

Teaching Experience 6

  1. 基礎情報工学A演習 東京理科大学

  2. 基礎情報工学B演習 東京理科大学

  3. 電気工学実験1 (分布定数回路) 東京理科大学

  4. 電気工学実験2 (振幅変調・復調) 東京理科大学

  5. 電気電子情報工学デザイン 東京理科大学

  6. 電気工学特別講義 東京理科大学

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Academic Activities 8

  1. TPC member, APSIPA ASC2026

    2026/07 - Present

  2. TPC member, IEEE PIMRC2026

    2026/01 - Present

  3. TPC member, IEEE CCNC 2026

    2025/09 - 2026/01

  4. TPC member, IEEE CCNC 2025

    2024/03 - 2025/01

    Activity type: Peer review

  5. TPC member, IEEE CCNC 2024

    2023 - 2023

    Activity type: Peer review

  6. TPC member, IEEE VTC 2022-Fall

    2022 - 2022

    Activity type: Peer review

  7. TPC member, IEEE VTC 2022-Spring

    2022 - 2022

    Activity type: Peer review

  8. TPC member, IEEE CCNC 2023

    2022 - 2022

    Activity type: Peer review

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