Details of the Researcher

PHOTO

Noriharu Suematsu
Section
Research Institute of Electrical Communication
Job title
Professor
Degree

  • 博士（工学）（早稲田大学）

  • 工学修士（早稲田大学）

Research History 3

  • 2008/10 - 2010/03
    Kamakura Works, Mitsubishi Electric

  • 1987/04 - 2008/09
    三菱電機(株)情報技術総合研究所

  • 1992/09 - 1993/09
    Department of E.E. Engineering, Leeds University, U.K.　Visiting Scholar

Education 2

  • Waseda University　Graduate School, Division of Engineering　電気工学専攻 電子情報通信専門分野

    - 1987/03

  • Waseda University　Faculty of Science and Engineering　Electronics and Communication Department

    - 1985/03

Committee Memberships 12

  • IEEE Japan Council　Chair

    2025/01 - Present

  • IEEE Sendai Section　Vice Chair

    2024/01 - Present

  • 日本学術会議 第25期URSI分科会 無線通信システム信号処理小委員会　委員長

    2021/04 - 2024/03

  • 電子情報通信学会マイクロ波研究会　委員長

    2021/05 - 2023/04

  • 電子情報通信学会APMC国内委員会　委員長

    2021/04 - 2023/03

  • IEEE Japan Council　理事, COC Chair

    2021/01 - 2022/12

  • IEEE Sendai Section　Secretary

    2018/01 - 2019/12

  • IEEE MTT-S Japan Chapter　Chair

    2013/01 - 2014/12

  • IEEE RFIC Symposium　Steering Committee Member

    2006/01 - 2012/12

  • エレクトロニクス実装学会　理事

    2010/04 - 2012/03

  • IEEE Tokyo Chapter　Executive Committee Member

    2009/01 - 2010/03

  • IEEE MTT-S Japan Chapter　Vice Chair

    2005/01 - 2008/12

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Professional Memberships 2

  • IEEE

  • IEICE

Research Interests 6

  • RFIC

  • Satellite Communication

  • Wireless Communication

  • Radio frequency

  • Millimeter-wave

  • Microwave

Research Areas 2

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

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electronic devices and equipment /

Awards 9

  1. 平成27年度「情報通信月間」東北総合通信局長表彰

    2015/06/01　総務省東北総合通信局

  2. 電子情報通信学会 第15回エレクトロニクスソサイエティ賞

    2012/09/12　電子情報通信学会　移動体通信用Si-RFIC技術の開発と実用化

  3. (社)発明協会 関東地方発明表彰 発明奨励賞

    2011/11/30　(社)発明協会　変調器

  4. (社)発明協会 関東地方発明表彰 発明奨励賞

    2009/11　(社)発明協会　バイアス回路

  5. 文部科学大臣表彰 科学技術賞(開発部門)

    2009/04/14　文部科学省　ETC車載用キーデバイス技術の開発

  6. (社)発明協会 関東地方発明表彰 発明奨励賞

    2006/11　(社)発明協会　偶高調波形ダイレクトコンバーション受信機

  7. 第50回電気科学技術奨励賞(オーム技術賞)

    2002/11/12　財団法人電気科学技術奨励会　携帯電話用ダイレクトコンバージョン方式受信機の開発・実用化

  8. (社)発明協会 関東地方発明表彰 発明奨励賞

    1997/10　(社)発明協会　高周波増幅器の非線形補償技術

  9. 電子情報通信学会平成２年度篠原記念学術奨励賞

    1991/03　電子情報通信学会　Ku帯プリディストーション形等経路リニアライザ，多数キャリヤ入力時におけるSSPAの混変調歪の検討

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Papers 233

  1. Regeneration of RF Spectrum Using Direct RF Undersampling Method and Its Application for Channel Model Measurement

    SHIBA Takashi, FURUICHI Tomoyuki, AKIMOTO Kohei, MOTOYOSHI Mizuki, KAMEDA Suguru, CAINELLI Gustavo Pedroso, Müller Sven, GAMBAL Bodo, KRANEFELD Nils, OHORI Fumiko, OSUGA Toru, PERSICO Giuliano, UNDERBERG Lisa, ITAYA Satoko, SUEMATSU Noriharu

    J108-C　(1)　3-12　2025/01/01

    DOI： 10.14923/transelej.2024mwi0001 　

    eISSN： 1881-0217

    More details Close

    Miniature size, low cost, wideband and real-time spectrum monitor using direct RF undersampling technology has been developed. Regeneration method of RF complex spectrum by using compressed sensing technology has been also proposed. We also apply these technologies to two types channel model measurements. We also propose improved method using reference signal for two type channel models. The obtained channel model data are reasonable at the physical points of view.

  2. Proposal of Channel Model Measurement Method Under Local 5G System Operation

    Takashi Shiba, Tomoyuki Furuichi, Gustavo Cainelli, Sven Müller, Bodo Gambal, Nils Kranefeld, Fumiko Ohori, Toru Osuga, Giuliano Persico, Lisa Underberg, Satoko Itaya, Noriharu Suematsu

    2024 IEEE VTS Asia Pacific Wireless Communications Symposium (APWCS)　1-5　2024/08/21

    Publisher: IEEE

    DOI： 10.1109/apwcs61586.2024.10679287 　

  3. Analysis and Measurement of a Novel Rectenna Array Crossing a Loop and Dipole Antennas

    Olan Heinen, Tamami Maruyama, Noa Ebita, Masashi Nakatsugawa, Masaya Tamura, Noriharu Suematsu

    ISAP 2024 - International Symposium on Antennas and Propagation　2024

    DOI： 10.1109/ISAP62502.2024.10846490 　

  4. Power Delay Profile Measurement Applied MUSIC for Local 5G System

    Takashi Shiba, Tomoyuki Furuichi, Noriharu Suematsu

    2023 6th World Symposium on Communication Engineering (WSCE)　49-55　2023/09/27

    Publisher: IEEE

    DOI： 10.1109/wsce59557.2023.10365776 　

  5. Measurement of Power Delay Profile for Local 5G System

    Takashi Shiba, Tomoyuki Furuichi, Noriharu Suematsu

    2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)　1-4　2023/08/19

    Publisher: IEEE

    DOI： 10.23919/ursigass57860.2023.10265413 　

  6. Sub-Terahertz-Band On-Chip 2×2 Beam-Forming Array Antenna Using a Compact 2-D BFN On 45nm SOI CMOS Peer-reviewed

    J. Temga, M. Motoyoshi, N. Suematsu

    2023 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)　1-3　2023/08/01

    Publisher: IEEE

    DOI： 10.1109/RFIT58767.2023.10243208 　

  7. Evaluation of Satellite Signal Reception Error by Sky View Factor for QZSS Short Message SS-CDMA Communication System

    Hiroto Kita, Hiroshi Oguma, Suguru Kameda, Noriharu Suematsu

    International Conference on ICT Convergence　726-730　2023

    DOI： 10.1109/ICTC58733.2023.10392360 　

    ISSN： 2162-1233

    eISSN： 2162-1241

  8. 100GHz-Band On-Chip 1x2 Phased Array Antenna Fed By Hybrid Coupler On 45nm CMOS SOI Peer-reviewed

    J. Temga, M. Motoyoshi, N. Suematsu

    2022 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)　164-166　2022/08

    Publisher: IEEE

    DOI： 10.1109/RFIT54256.2022.9882441 　

  9. Evaluation of Transmission Timing Control Error for QZSS Short Message SS-CDMA Communication System

    Hiroshi Oguma, Rei Kawai, Suguru Kameda, Noriharu Suematsu

    2022 Thirteenth International Conference on Ubiquitous and Future Networks (ICUFN)　2022/07/05

    Publisher: IEEE

    DOI： 10.1109/icufn55119.2022.9829615 　

  10. Real-Time Wideband Spectrum Monitor Using Multiple Sampling Frequency Direct RF Undersampling for Wireless IoT Peer-reviewed

    T. Shiba, T. Furuichi, K. Akimoto, M. Motoyoshi, S. Kameda, N. Suematsu

    2021 51st European Microwave Conference (EuMC)　725-728　2022/04

    Publisher: IEEE

    DOI： 10.23919/EuMC50147.2022.9784290 　

  11. 7.5 GHz-Band Digital Beamforming Using 1-bit Direct Digital RF Transmitter with 10GbE Optical Module Peer-reviewed

    R. Tamura, M. Motoyoshi, S. Kameda, N. Suematsu

    2021 51st European Microwave Conference (EuMC)　51-54　2022/04

    Publisher: IEEE

    DOI： 10.23919/EuMC50147.2022.9784290 　

  12. RF Signal Frequency Identification in a Direct RF Undersampling Multi-Band Real-Time Spectrum Monitor for Wireless IoT Usage

    Tomoyuki FURUICHI, Mizuki MOTOYOSHI, Suguru KAMEDA, Takashi SHIBA, Noriharu SUEMATSU

    IEICE Transactions on Communications　E105.B　(4)　461-471　2022/04/01

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

    DOI： 10.1587/transcom.2021wwp0011 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  13. A 5.5GHz-Band 2x2 Array Antennas Module Based on Compact 2-D Beamforming Network in Broadside Coupled Stripline Peer-reviewed

    J. Temga, M. Motoyoshi, T. Shiba, N. Suematsu

    2022 16th European Conference on Antennas and Propagation (EuCAP)　1-4　2022/03

    Publisher: IEEE

    DOI： 10.23919/EuCAP53622.2022.9769180 　

  14. A Low-Loss and Compact UHF RFID Tag Antenna for Implanted Denture

    Junyi Xu, Hiroyasu Sato, Mizuki Motoyoshi, Noriharu Suematsu, Kazuhito Yasui, Qiang Chen

    IEEE Journal of Radio Frequency Identification　6　1-7　2022

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

    DOI： 10.1109/JRFID.2021.3081183 　

  15. Gain Boosted D-Band CMOS Amplifier Using a Radial Stab for Source AC Grounding Peer-reviewed

    T. Machii, M. Motoyoshi, S. Kameda, N. Suematsu

    Proc. of Asia Pacific Microwave Conference (APMC)　190-192　2021/11

    Publisher: IEEE

    DOI： 10.1109/APMC52720.2021.9661625 　

  16. A Spectrum Regeneration and Demodulation Method for Multiple Direct Undersampled Real Signals

    Takashi SHIBA, Tomoyuki FURUICHI, Mizuki MOTOYOSHI, Suguru KAMEDA, Noriharu SUEMATSU

    IEICE Transactions on Communications　E104.B　(10)　1260-1267　2021/10/01

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

    DOI： 10.1587/transcom.2020dsp0006 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  17. USRP Implementation of Transmission Timing Control Function for Synchronized SS-CDMA Using Wireless Two-Way Interferometry (Wi-Wi)

    Suguru Kameda, Yusaku Honma, Noriharu Suematsu, Satoshi Yasuda, Nobuyasu Shiga

    International Conference on Ubiquitous and Future Networks, ICUFN　2021-　328-333　2021/08/17

    Publisher: IEEE Computer Society

    DOI： 10.1109/ICUFN49451.2021.9528697 　

    ISSN： 2165-8536 2165-8528

  18. Novel Design of Rectenna Array Using Metasurface for IoT

    Tamami Maruyama, Masashi Nakatsugawa, Noriharu Suematsu, Mizuki Motoyoshi, Qiang Chen, Hiroyasu Sato, Manabu Omiya

    2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)　2021/08/09

    Publisher: IEEE

    DOI： 10.1109/apwc52648.2021.9539790 　

  19. Re ‐Evaluation of a Dual‐Feed Linear Polarized 2‐by‐2 Circular Patch Array Antenna for 60‐GHz‐Band Digital Beamforming Applications

    Satoshi Yoshida, Suguru Kameda, Noriharu Suematsu, Kenjiro Nishikawa

    IEEJ Transactions on Electrical and Electronic Engineering　16　(12)　1653-1655　2021/08/03

    Publisher: Wiley

    DOI： 10.1002/tee.23478 　

    ISSN： 1931-4973

    eISSN： 1931-4981

  20. Image Enhancement in 26GHz-Band 1-Bit Direct Digital RF Transmitter Using Manchester Coding Peer-reviewed

    J. ZHANG, M. KAZUNO, M. MOTOYOSHI, S. KAMEDA, N. SUEMATSU

    IEICE Transactions on Communications　E104-B　(6)　654-663　2021/06

    Publisher: IEICE

    DOI： 10.1587/transcom.2020EBP3083 　

  21. Expansion of the Beamforming Coverage Area in an Elevation Plane for 60 GHz Band 3-D Beamforming

    Satoshi Yoshida, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu, Kenjiro Nishikawa

    IEEE Antennas and Wireless Propagation Letters　20　(5)　773-777　2021/05

    DOI： 10.1109/LAWP.2021.3063098 　

    ISSN： 1536-1225

    eISSN： 1548-5757

  22. A Compact 28GHz-Band 4x4 Butler Matrix Based Beamforming Antenna module in Broadside Coupled Stripline Peer-reviewed

    J. Temga, K. Edamatsu, M. Motoyoshi, N. Suematsu

    2021 15th European Conference on Antennas and Propagation (EuCAP)　1-4　2021/03

    Publisher: IEEE

    DOI： 10.23919/EuCAP51087.2021.9411501 　

  23. Measurement of Radio Channel Impulse Response Using USRP X300 with SBX-120 / UBX Software Defined Radio Considering Non-Causal Components Peer-reviewed

    Tomoya NAKAHAMA, Yoji YAMADA, Suguru KAMEDA, Mizuki MOTOYOSHI, Noriharu SUEMATSU

    IEICE TRANSACTIONS on Communications　J104-B　(3)　199-209　2021/03/01

    DOI： 10.14923/transcomj.2020GWP0019 　

    ISSN： 1881-0209

  24. System Implementation of Synchronized SS-CDMA for QZSS Safely Confirmation System

    H. Oguma, R. Kawai, T. Asai, S. Kameda, M. Motoyoshi, N. Suematsu

    2020 International Conference on Information and Communication Technology Convergence (ICTC)　2020/10/21

    Publisher: IEEE

    DOI： 10.1109/ictc49870.2020.9289560 　

  25. Effect of Estimation Timing Error on Pre-TDE for Narrowband Uplink NOMA

    Kei Yoshida, Suguru Kameda, Noriharu Suematsu

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

    DOI： 10.1109/WPMC50192.2020.9309481 　

    ISSN： 1347-6890

  26. A filter design method of direct rf undersampling on-board receiver for ka-band HTS

    Tomoyuki Furuichi, Yang Gui, Mizuki Motoyoshi, Suguru Kameda, Takashi Shiba, Noriharu Suematsu

    IEICE Transactions on Communications　E103B　(10)　1078-1085　2020/10/01

    DOI： 10.1587/transcom.2019CBP0008 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  27. Self-Interference Mitigation using 1-Bit Bandpass Delta-Sigma Modulator with No Output Section

    Takashi Maehata, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2020 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2020　97-99　2020/09

    DOI： 10.1109/RFIT49453.2020.9226234 　

  28. Novel Dual-Band Wireless Communication System for Medical usage

    Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2020 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2020　130-132　2020/09

    DOI： 10.1109/RFIT49453.2020.9226202 　

  29. In-body/Out-body Dual-Use Miniaturized RFID Tag System Using 920MHz/5.02GHz Bands

    Bowen Dang, Mizuki Motoyoshi, Junyi Xu, Hiroyasu Sato, Suguru Kameda, Qiang Chen, Noriharu Suematsu

    2020 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)　2020/09

    Publisher: IEEE

    DOI： 10.1109/rfit49453.2020.9226219 　

  30. Evaluation of channel capacity of millimeter-wave wireless body area network in overcrowded train

    Taichi Yokouchi, Kohei Akimoto, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    IEICE COMMUNICATIONS EXPRESS　9　(9)　451-456　2020

    DOI： 10.1587/comex.2020XBL0072 　

    ISSN： 2187-0136

  31. Dual-CTS: Novel High-Efficiency Spatial Reuse Method in Heterogeneous Wireless IoT Systems.

    Kento Ono, Kohei Akimoto, Suguru Kameda, Noriharu Suematsu

    1-6　2020

    DOI： 10.1109/PIMRC48278.2020.9217244 　

  32. 60 GHz 180 uW Power Consumption CMOS ASK Transmitter Using Combined On-Chip Resonator and Antenna Peer-reviewed

    M. Motoyoshi, S. Kameda, N. Suematsu

    IEICE Transactions on Electronics　E102-C　(1)　725-739　2019/10

    Publisher: IEICE

    DOI： 10.1587/transele.2019MMP0012 　

    ISSN： 1745-1353

    eISSN： 1745-1353

    More details Close

    In this paper, we proposed low power consumption ASK transmitter based on the direct modulated oscillator at 60 GHz-band. To achieve the proposed transmitter, high power-efficient oscillator and loss less modulator are designed. Moreover combined on-chip resonator and antenna to remove the buffer amplifier of the transmitter to reduce the power consumption and size. The proposed transmitter has been fabricated in standard 65 nm CMOS process. The core area is 1130 μm × 590 μm with pads. The operation frequency is 60.4 GHz. The BER of 10− is achieved under 50 Mbps with power consumption of less than 260 μW including the buffer amplifier. Using the proposed combined on-chip resonator and antenna, which need no buffer amplifier for transmitter and the power consumption is reduced to 180 μW. 6

  33. Experimental Analysis of Positioning Accuracy of GPS/BeiDou on Elevation Mask Peer-reviewed

    Ren Shinozaki, Hiroshi Oguma, Suguru Kameda, Noriharu Suematsu

    ICTC 2019 - 10th International Conference on ICT Convergence: ICT Convergence Leading the Autonomous Future　433-437　2019/10

    DOI： 10.1109/ICTC46691.2019.8939723 　

  34. Analysis and Measurement of Diode Mounting Meta-surface for Reflection Beam Control

    Tamami Maruyama, Kosei Ozeki, Noriharu Suematsu, Hiroyasu Sato, Mizuki Motoyoshi, Manabu Omiya

    2019 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)　2019/09

    Publisher: IEEE

    DOI： 10.1109/apwc.2019.8870537 　

  35. Applied Reflectarray based on Metasurface for Wireless Power Transmission Efficiencys Peer-reviewed

    Tamami Maruyama, Qiang Chen, Noriharu Suematsu

    2019/09

  36. 28 GHz band direct RF undersampling broadband receiver for Ka-band HTS on-board unit

    Tomoyuki Furuichi, Yang Gui, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    GSMM 2019 - 12th Global Symposium on Millimeter Waves, Proceeding　56-58　2019/05

    DOI： 10.1109/GSMM.2019.8797664 　

  37. Evaluation of Synchronized SS-CDMA for QZSS Safety Confirmation System Peer-reviewed

    Suguru Kameda, Akinori Taira, Yuji Miyake, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    IEEE Transactions on Vehicular Technology　68　(5)　4846-4856　2019/05

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

    DOI： 10.1109/TVT.2019.2905530 　

    ISSN： 0018-9545

    eISSN： 1939-9359

  38. Simulation-based Evaluation of Inter-Network Interference of 60 GHz WBAN Considering Human Body Attenuation in Multiple-User Environment

    AKIMOTO Kohei, MOTOYOSHI Mizuki, KAMEDA Suguru, SUEMATSU Noriharu

    J102-B　(2)　44-51　2019/02/01

    DOI： 10.14923/transcomj.2018gtp0002 　 10.1587/comex.2020xbl0072_references_DOI_Qi9CIeysEaoL2g06O54LMKw41qu 　

    ISSN： 1344-4697

    More details Close

    Wireless body area network (WBAN) using millimeter wave is expected to solve inter-WBAN interference problem. The human body attenuation is important to reduce the interference especially in user-dense condition. In this paper, the millimeter-wave inter-WBAN interference propagation model considering the human body attenuation is proposed and evaluated the interference environment in the user-dense condition by the computer simulation. The link budget considering the four kinds of attenuation of the interference power is introduced and the condition of the inter-WBAN interference is discussed. It is confirmed by the computer simulation that the number of the interference users per user converges as seven interfering users in the user-dense condition. Therefore, the millimeter-wave WBAN is very effective to reduce the inter-WBAN interference.

  39. A study on direct RF undersampling receiver configuration considering timing skew spurs using time-interleaved ADC

    Tomoyuki Furuichi, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    Asia-Pacific Microwave Conference Proceedings, APMC　2018-November　1525-1527　2019/01/16

    DOI： 10.23919/APMC.2018.8617355 　

  40. A 26GHz-band image enhancement type 1-Bit DAC for direct digital RF modulator

    Junhao Zhang, Masafumi Kazuno, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    Asia-Pacific Microwave Conference Proceedings, APMC　2018-November　479-481　2019/01/16

    DOI： 10.23919/APMC.2018.8617154 　

  41. Evaluation of link level performance considering EVM of transmit signal for downlink NOMA

    Kenta Mayama, Kohei Akimoto, Suguru Kameda, Noriharu Suematsu

    Asia-Pacific Microwave Conference Proceedings, APMC　2018-November　774-776　2019/01/16

    DOI： 10.23919/APMC.2018.8617620 　

  42. Electromagnetic Shielding of Conductive Polymer Combined Fabric

    Koki Edamatsu, Mizuki Motoyoshi, Noriharu Suematsu, Ken Miura, Keiichi Torimitsu

    2019 12TH GLOBAL SYMPOSIUM ON MILLIMETER WAVES (GSMM 2019)　44-46　2019

    ISSN： 2380-9515

  43. Experimental evaluation of synchronized SS-CDMA transmission timing control method for QZSS short message communication

    Suguru Kameda, Kei Ohya, Hiroshi Oguma, Noriharu Suematsu

    IEICE Transactions on Communications　E102B　(8)　1781-1790　2019

    DOI： 10.1587/transcom.2018EBP3166 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  44. 60 GHz 180 µW power consumption CMOS ask transmitter using combined on-chip resonator and antenna

    Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    IEICE Transactions on Electronics　E102C　(10)　725-731　2019

    DOI： 10.1587/transele.2019MMP0012 　

    ISSN： 0916-8524

    eISSN： 1745-1353

  45. Evaluation of Intra-WBAN Channel Capacity for Toe-Hop Millimeter-Wave WBAN

    Kohei Akimoto, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2019 12TH GLOBAL SYMPOSIUM ON MILLIMETER WAVES (GSMM 2019)　53-55　2019

    ISSN： 2380-9515

  46. Traffic Navigation & Relay: System-Wide Load Balancing Method for Heterogeneous Network Using Route Direction and Packets Relay

    Kento Ono, Takahiro Ono, Kohei Akimoto, Suguru Kameda, Noriharu Suematsu

    2019 URSI ASIA-PACIFIC RADIO SCIENCE CONFERENCE (AP-RASC)　2019

  47. Evaluation of Channel Capacity of Millimeter-Wave WBAN Considering Human Body Blocking in User-Dense Condition

    Taichi Yokouchi, Kohei Akimoto, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2019 ELEVENTH INTERNATIONAL CONFERENCE ON UBIQUITOUS AND FUTURE NETWORKS (ICUFN 2019)　57-59　2019

    ISSN： 2165-8528

  48. Random Access Control Scheme with Reservation Channel for Capacity Expansion of QZSS Safety Confirmation System. Peer-reviewed

    Suguru Kameda, Kei Ohya, Tomohide Takahashi, Hiroshi Oguma, Noriharu Suematsu

    IEICE Transactions　102-A　(1)　186-194　2019

    DOI： 10.1587/transfun.E102.A.186 　

    ISSN： 0916-8508

    eISSN： 1745-1337

  49. A 28 GHz-Band Direct RF Undersampling S/H CMOS IC with 40 dB SNR

    Nagahiro Yoshino, Keita Norishima, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2018 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2018　2018/11/05

    DOI： 10.1109/RFIT.2018.8524070 　

  50. Design of Dual-Frequency Reflectarray Using Particle Swam Optimization Peer-reviewed

    Takuto Ohsawa, Tamami Maruyama, Manabu Omiya, Noriharu Suematsu

    2018. the International Symposium on Antennas and Propagation, ISAP 2018　10　(301)　847-848　2018/10

  51. Optimum Allocation Scheme for User Fairness of Location-Based Virtual Sector Method Solving Hidden Terminal Problem in WLAN Peer-reviewed

    Kohei Akimoto, Suguru Kameda, Noriharu Suematsu

    IEEE Transactions on Vehicular Technology　67　(9)　8363-8371　2018/09

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

    DOI： 10.1109/TVT.2018.2846607 　

    ISSN： 0018-9545

    eISSN： 1939-9359

  52. 57 GHz 130 uW CMOS millimeter-wave oscillator for ultra low power sensor node

    Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2018 11th Global Symposium on Millimeter Waves, GSMM 2018　2018/08/17

    DOI： 10.1109/GSMM.2018.8439651 　

  53. 26 GHz-band direct digital signal generation by a manchester coding 1-bit band-pass delta-sigma modulator using it's 7th nyquist zone

    Masafumi Kazuno, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2018 11th Global Symposium on Millimeter Waves, GSMM 2018　2018/08/17

    DOI： 10.1109/GSMM.2018.8439555 　

  54. Development of Denture Implanted RFID Tag Antennas Peer-reviewed

    J. Xu, H. Sato, M. Motoyoshi, N. Suematsu, H. Kanetaka, K. Yasui, Q. Chen

    Proc. of 2018 IEEE International Workshop on Electromagnetics:Applications and Student Innovation Competition (iWEM)　2018/08

    Publisher: IEEE

    DOI： 10.1109/iWEM.2018.8536610 　

  55. Beam Direction Control Using Metasurface Loaded with Diodes for IoT Peer-reviewed

    Maruyama, K. Ozeki, N. Ito, S. Kameda, Q. Chen, N. Suematsu

    Progress In Electromagnetics Research Symposium, PIERS 2018.　2018/08

  56. Responsiveness and Timing

    Tomohiro Yoneda, Yoshihiro Nakabo, Nobuyuki Yamasaki, Masayoshi Takasu, Masashi Imai, Suguru Kameda, Hiroshi Oguma, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    VLSI Design and Test for Systems Dependability　351-393　2018/07

    DOI： 10.1007/978-4-431-56594-9_9 　

    More details Close

    © Springer Japan KK, part of Springer Nature 2019<br /> This chapter deals with the issue of timing and synchronicity, which is fundamental in the architecture design of computer, communication, and control systems. In fact, if a signal took too long to travel from one point in a system to another exceeding the predetermined length of time, then the system would involve an error, fault, or failure. An electromechanical robot would lose intended integrity in coordinated limb motions without responsive signals arriving in time from elsewhere in its distributed hard real-time control system. Successful delivery of a universal clock signal would be indispensable for distributed coupled computer-and-communication systems for real-time financial transactions. Section 9.1 describes the requirements in hard real-time control system such as industrial and humanoid robots. Section 9.2 is a proposal of a computer architecture for hard real-time control that is capable of pre-emptive multiple-thread computation on demand and noise-immune communications between distributed sensor–actuator nodes. This architecture, called RMTP (Real-Time Multithread Processor), has been implemented in compact 3-D modules and made available for academic uses along with the design tools. Section 9.3 describes asynchronous networks which can efficiently and reliably connect on-chip and off-chip functions in a distributed system against timing errors. The use of a global synchronization in public wireless telecommunication is proposed in Sect. 9.4 to provide dependable connectivity and maximized throughput using the satellites and cellular base stations with heterogeneous air interfaces.

  57. Extended Dependable Air: Use of Satellites in Boosting Dependability of Public Wireless Communications

    Kazuo Tsubouchi, Suguru Kameda, Hiroshi Oguma, Akinori Taira, Noriharu Suematsu, Tadashi Takagi

    VLSI Design and Test for Systems Dependability　675-691　2018/07

    DOI： 10.1007/978-4-431-56594-9_23 　

    More details Close

    © Springer Japan KK, part of Springer Nature 2019<br /> We propose “Extended Dependable Air” as a highly reliable wireless network. Extended Dependable Air can be used in the “3S” areas: space, surface, and sea. For the implementation of the Extended Dependable Air, two key technologies using satellite systems such as the Quasi-Zenith Satellite System (QZSS) and the Global Positioning System (GPS) are proposed; One is a QZSS Spread Spectrum Code Division Multiple Access (SS-CDMA) short-message communication system, and the other is a heterogeneous wireless system with a network selection scheme using positioning information. The former, the QZSS SS-CDMA short-message communication system, is proposed for large-scale disaster relief. The target capacity of the proposed system is the transmission of at least three million message data per hour. Because this method provides high-density user multiplexing using long spread codes in the uplink, highly accurate timing and frequency synchronization among all terminals is the most important issue. SS-CDMA ensures the use of QZSS positioning signals and maintains the orthogonality in the time and frequency domains among all the codes transmitted from terminals. The latter, the heterogeneous wireless systems, are candidates for achieving a large capacity in next-generation mobile communication systems. In this section, we propose a cell selection scheme for data traffic optimization in heterogeneous wireless systems. The proposed scheme uses high-accuracy positioning information and the average signal strength for cell selection. Using positioning information, users can select a cell with the highest channel quality quickly and easily. It is considered that the proposed scheme will be useful for optimizing data traffic offloading in heterogeneous wireless networks.

  58. 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.

  59. Experimental evaluation of synchronization accuracy considering sky view factor for QZSS short message synchronized SS-CDMA Peer-reviewed

    Kameda Suguru, Ohya Kei, Shinozaki Ren, Oguma Hiroshi, Suematsu Noriharu

    IEICE COMMUNICATIONS EXPRESS　7　(9)　322-327　2018/07

    DOI： 10.1587/comex.2018XBL0082 　

    ISSN： 2187-0136

  60. Differential pair feed line design for a millimeter-size antenna for in-body/out-body dual usage Peer-reviewed

    Naoyuki Takeda, Takuto Saito, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    Asia-Pacific Microwave Conference Proceedings, APMC　768-771　2018/01/08

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/APMC.2017.8251561 　

  61. A study on the SNR in higher Nyquist zone of 1-bit low-pass delta-sigma RZ-DAC

    Masafumi Kazuno, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    Asia-Pacific Microwave Conference Proceedings, APMC　918-921　2018/01/08

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/APMC.2017.8251599 　

  62. Measurement of human body blocking at 60 GHz for inter-network interference of mmWave WBAN

    Kohei Akimoto, Suguru Kameda, Mizuki Motoyoshi, Noriharu Suematsu

    Asia-Pacific Microwave Conference Proceedings, APMC　472-475　2018/01/08

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/APMC.2017.8251483 　

  63. Measurement of On-Body Propagation Loss for Directional Millimeter-Wave WBAN

    Kohei Akimoto, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2018 11TH GLOBAL SYMPOSIUM ON MILLIMETER WAVES (GSMM)　94-96　2018

    ISSN： 2380-9515

  64. A Line Coding for Digital RF Transmitter Using a 1-Bit Band-Pass Delta-Sigma Modulator. Peer-reviewed

    Takashi Maehata, Suguru Kameda, Noriharu Suematsu

    IEICE Transactions　101-B　(11)　2313-2319　2018

    DOI： 10.1587/transcom.2017EBP3393 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  65. Asymmetrical Waveform Compensation for Concurrent Dual-Band 1-bit Band-Pass Delta-Sigma Modulator with a Quasi-Elliptic Filter. Peer-reviewed

    Takashi Maehata, Suguru Kameda, Noriharu Suematsu

    IEICE Transactions　101-B　(6)　1352-1358　2018

    DOI： 10.1587/transcom.2017EBP3216 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  66. Novel reflected beam switching method using meta-surface loaded with active elements Peer-reviewed

    T. Maruyama, T. Shimano, Q. Chen, S. Kameda, N. Suematsu

    2017 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, APWC 2017　2017-　300-301　2017/10/06

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/APWC.2017.8062306 　

  67. A Ku-band direct RF undersampling receiver with an intermittent-mode amplifier

    Noriharu Suematsu, Takeo Owada, Tomokazu Koizumi Mizuki Motoyoshi, Suguru Kameda

    2017 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2017　217-219　2017/09/20

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/RFIT.2017.8048255 　

  68. ワイヤレスインターネット社会を支える高周波集積回路技術 Invited Peer-reviewed

    末松憲治

    電子情報通信学会誌　100　(9)　902-906　2017/09/01

  69. Experimental evaluation of transmission timing control method for QZSS short message synchronized SS-CDMA communication Peer-reviewed

    Kei Ohya, Suguru Kameda, Hiroshi Oguma, Noriharu Suematsu

    International Conference on Ubiquitous and Future Networks, ICUFN　361-366　2017/07/26

    Publisher: IEEE Computer Society

    DOI： 10.1109/ICUFN.2017.7993809 　

    ISSN： 2165-8536 2165-8528

    eISSN： 2165-8536

  70. Feasibility study of expansion of OpenFlow network using satellite communication to wide area Peer-reviewed

    Nagahiro Yoshino, Hiroshi Oguma, Suguru Kamedm, Noriharu Suematsu

    International Conference on Ubiquitous and Future Networks, ICUFN　647-651　2017/07/26

    Publisher: IEEE Computer Society

    DOI： 10.1109/ICUFN.2017.7993871 　

    ISSN： 2165-8536 2165-8528

  71. A 18.6 GHz locking range, 60 GHz band varactor-tuned injection locked frequency divider in 65 nm CMOS Peer-reviewed

    Masafumi Kazuno, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    10th Global Symposium on Millimeter-Waves, GSMM 2017　146-148　2017/07/06

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/GSMM.2017.7970297 　

  72. 1-bit Band-Pass Delta-Sigma Modulator with Parallel IIR Form for Concurrent Multiband Digital Transmitter Peer-reviewed

    Takashi Maehata, Suguru Kameda, Noriharu Suematsu

    IEICE TRANSACTIONS ON COMMUNICATIONS　E100B　(7)　1152-1159　2017/07

    DOI： 10.1587/transcom.2016EBP3318 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  73. Cancellation for Asymmetrical Waveform in 1-bit Bandpass Delta-Sigma Modulators Peer-reviewed

    Takashi Maehata, Suguru Kameda, Noriharu Suematsu

    IEICE TRANSACTIONS ON COMMUNICATIONS　E100B　(6)　1017-1022　2017/06

    DOI： 10.1587/transcom.2016EBP3178 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  74. Modeling indoor-outdoor propagation in wooden residential area at 2.5 GHz and 3.5 GHz bands Peer-reviewed

    Hideki Fukudome, Kohei Akimoto, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2017 International Conference on Computing, Networking and Communications (ICNC)　277-281　2017/01/26

    DOI： 10.1109/ICCNC.2017.7876139 　

  75. Influence of multi path on positioning accuracy in a low sky view factor environment. Peer-reviewed

    Sho Tatsuguchi, Yuta Oshima, Hiroshi Oguma, Suguru Kameda, Noriharu Suematsu

    International Conference on Information and Communication Technology Convergence, ICTC 2017, Jeju Island, Korea (South), October 18-20, 2017　2017-December　264-267　2017

    Publisher: IEEE

    DOI： 10.1109/ICTC.2017.8190983 　

  76. Construction of transmission timing control system using FPGA for QZSS short message synchronized SS-CDMA communication. Peer-reviewed

    Rei Kawai, Hiroshi Oguma, Suguru Kameda, Noriharu Suematsu

    International Conference on Information and Communication Technology Convergence, ICTC 2017, Jeju Island, Korea (South), October 18-20, 2017　2017-December　217-222　2017

    Publisher: IEEE

    DOI： 10.1109/ICTC.2017.8190972 　

  77. Reflectarray design for small antenna using meta-surface Peer-reviewed

    T. Maruyama, S. Endo, Q. Chen, S. Kameda, N. Suematsu

    2016 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)　250-251　2016/11/19

    DOI： 10.1109/APWC.2016.7738169 　

  78. Side coaxial connector feed design for a millimeter-wave patch antenna measurement Peer-reviewed

    Mizuki Motoyoshi, Wenying Ye, Suguru Kameda, Noriharu Suematsu

    2016 International Symposium on Antennas and Propagation (ISAP)　1046-1047　2016/10/24

  79. Operational frequencies of in-body/out-body dual use antenna for tablet/pill implementation Peer-reviewed

    Takuto Saito, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2016 International Symposium on Antennas and Propagation (ISAP)　1040-1041　2016/10/24

  80. Experimental evaluation of timing synchronization accuracy for QZSS short message synchronized SS-CDMA communication Peer-reviewed

    Kei Ohya, Suguru Kameda, Hiroshi Oguma, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)　1-6　2016/09/04

    DOI： 10.1109/PIMRC.2016.7794636 　

  81. An image rejection type Ku-band direct RF undersampling CMOS receiver Peer-reviewed

    K. Norishima, T. Koizumi, M. Motoyoshi, S. Kameda, N. Suematsu

    2016 Global Symposium on Millimeter Waves (GSMM) & ESA Workshop on Millimetre-Wave Technology and Applications　1-4　2016/06/08

    DOI： 10.1109/GSMM.2016.7500300 　

  82. Measurement of 3.5 GHz Band Small Cell Indoor-Outdoor Propagation in Multiple Environments Peer-reviewed

    Hideki Fukudome, Kohei Akimoto, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    European Wireless 2016&22th European Wireless Conference　1-6　2016/05/18

  83. 1-bit Feedforward Distortion Compensation Technology for Bandpass Delta-Sigma Modulation Peer-reviewed

    Takashi Maehata, Suguru Kameda, Noriharu Suematsu

    IEICE TRANSACTIONS ON COMMUNICATIONS　E99B　(5)　1087-1092　2016/05

    DOI： 10.1587/transcom.2015EBP3441 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  84. Traffic Navigation Using High-accuracy Positioning Information and Channel Quality Map： Evaluation of Route Guiding Function

    Tohoku-Section Joint Convention Record of Institutes of Electrical and Information Engineers, Japan　2016　36-36　2016

    Publisher: Organizing Committee of Tohoku-Section Joint Convention of Institutes of Electrical and Information Engineers, Japan

    DOI： 10.11528/tsjc.2016.0_36 　

  85. Demodulation Characteristics of a 20GHz-band Direct RF Undersampling Receiver Peer-reviewed

    K. Norishima, T. Koizumi, M. Motoyoshi, S. Kameda, N. Suematsu

    2016 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC2016)　2016

  86. Efficient Random Access Control Scheme with Reservation Channel for QZSS Short Message SS-CDMA Communication Peer-reviewed

    Kei Ohya, Tomohide Takahashi, Suguru Kameda, Hiroshi Oguma, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2016 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE　2016

    DOI： 10.1109/WCNC.2016.7565147 　

    ISSN： 1525-3511

  87. A 0.4-ns Power Switching Ku-Band Amplifier for Direct RF Undersampling Receiver Peer-reviewed

    Tomokazu Koizumi, Takeo Owada, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    2016 GLOBAL SYMPOSIUM ON MILLIMETER WAVES (GSMM) & ESA WORKSHOP ON MILLIMETRE-WAVE TECHNOLOGY AND APPLICATIONS　44-47　2016

    DOI： 10.1109/GSMM.2016.7500296 　

    ISSN： 2380-9515

  88. A Low Power Consumption Direct RF Undersampling Receiver Using Continuous-Mode / Intermittent-Mode Hybrid LNA Structure Peer-reviewed

    Noriharu Suematsu, Tomokazu Koizumu, Mizuki Motoyoshi, Suguru Kameda

    2016 IEEE INTERNATIONAL SYMPOSIUM ON RADIO-FREQUENCY INTEGRATION TECHNOLOGY (RFIT)　2016

    DOI： 10.1109/RFIT.2016.7578117 　

  89. High SNR CMOS S/H IC for Multi-Carrier Direct RF Under Sampling Receiver Peer-reviewed

    Mizuki Motoyoshi, Tomokazu Koizumi, Takashi Maehata, Suguru Kameda, Noriharu Suematsu

    2016 IEEE INTERNATIONAL SYMPOSIUM ON RADIO-FREQUENCY INTEGRATION TECHNOLOGY (RFIT)　2016

    DOI： 10.1109/RFIT.2016.7578115 　

  90. Design of dual-band reflectarray using genetic algorithm Peer-reviewed

    T. Maruyama, Q. Chen, S. Kameda, N. Suematsu

    2016 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP)　644-645　2016

  91. QZSS SS-CDMA Location and Short Message Communication System Peer-reviewed

    Noriharu SUEMATSU, Suguru KAMEDA, Yuji MIYAKE, Tomohide TAKAHASHI, Akinori TAIRA, Tadashi TAKAGI, Kazuo TSUBOUCH

    The 18th International Symposium on Wireless Personal Multimedia Communications (WPMC'15)　2015/12/14

  92. Evacuee Information System on Lessons from the Great East Japan Earthquake Peer-reviewed

    H. Oguma, A. Koizumi, S. Matsuura, Y. Kawada, S. Kameda, N. Suematsu

    9th International Conference on Software, Knowledge, Information Management & Applications (SKIMA2015)　392-396　2015/12

  93. A Millimeter-Wave WPAN Adaptive Phased Array Control Method Using Low-Frequency Part of Signal for Self-Directed System Peer-reviewed

    Tuan Thanh Ta, Shoichi Tanifuji, Akinori Taira, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES　63　(8)　2682-2691　2015/08

    DOI： 10.1109/TMTT.2015.2443774 　

    ISSN： 0018-9480

    eISSN： 1557-9670

  94. 1/2 f(s) Direct RF Under Sampling Receiver for Multi Channel Satellite Systems Peer-reviewed

    Daliso Banda, Mizuki Motoyoshi, Tomokazu Koizumi, Osamu Wada, Tuan Thanh Ta, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    IEICE TRANSACTIONS ON ELECTRONICS　E98C　(7)　669-676　2015/07

    DOI： 10.1587/transele.E98.C.669 　

    ISSN： 1745-1353

  95. 異種無線融合システムにおける位置情報を用いたネットワーク選択手法のユーザスループット特性 Peer-reviewed

    窪庭純平, 三宅裕士, 平明徳, 亀田卓, 小熊博, 末松憲治, 高木直, 坪内和夫

    IEICE Transacsion　vol.J98-B　(No.7)　611-624　2015/07/01

  96. QZSSショートメッセージSS-CDMA通信システムにおける時間・周波数精度を考慮した伝送特性 Peer-reviewed

    三宅裕士, 平明徳, 亀田卓, 小熊博, 富, 末松憲治, 高木直, 坪内和夫

    IEICE Transacsion　vol.J98-B　(No.7)　397-405　2015/04/01

  97. Channel quality map construction scheme using location information for heterogeneous wireless network Peer-reviewed

    H. Oguma, A. Koizumi, K. Norishima, J. Kuboniwa, Y. Miyake, S. Kameda, A. Taira, N. Suematsu, T. Takagi, K. Tsubouchi

    Studies in Sci. and Tech.　4(1)　83-90　2015

    DOI： 10.11425/sst.4.83 　

  98. High Efficient Network Selection Scheme Using Location Information for Heterogeneous Wireless System Peer-reviewed

    Junpei Kuboniwa, Yuji Miyake, Suguru Kameda, Akinori Taira, Hiroshi Oguma, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2015 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)　391-396　2015

    ISSN： 2167-8189

  99. An Optimum Inductive Matched Cascode LNA in 60GHz-Band Peer-reviewed

    Hiroyuki Mizutani, Eiji Taniguchi, Masaomi Tsuru, Ryuji Inagaki, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2015 IEEE INTERNATIONAL SYMPOSIUM ON RADIO-FREQUENCY INTEGRATION TECHNOLOGY (RFIT)　28-30　2015

    DOI： 10.1109/RFIT.2015.7377876 　

  100. RFIC Flip-Chip Interconnection Using a Fiber Type Anisotropic Conductive Film Peer-reviewed

    Takeo Owada, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2015 IEEE INTERNATIONAL SYMPOSIUM ON RADIO-FREQUENCY INTEGRATION TECHNOLOGY (RFIT)　118-120　2015

    DOI： 10.1109/RFIT.2015.7377906 　

  101. Self-directed Beamforming IF receiver for Broadband Communication Using Low Frequency Loop Control Peer-reviewed

    Mizuki Motoyoshi, Mikoto Nakamura, Surugu Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2015 IEEE INTERNATIONAL SYMPOSIUM ON RADIO-FREQUENCY INTEGRATION TECHNOLOGY (RFIT)　145-147　2015

    DOI： 10.1109/RFIT.2015.7377915 　

  102. A 0.8-1.9GHz-Band CMOS Direct Digital RF Quadrature Modulator Peer-reviewed

    Noriharu Suematsu, Osamu Wada, Surugu Kameda, Tadashi Takagi, Kazuo Tsubouchi

    2015 IEEE INTERNATIONAL SYMPOSIUM ON RADIO-FREQUENCY INTEGRATION TECHNOLOGY (RFIT)　148-150　2015

    DOI： 10.1109/RFIT.2015.7377916 　

  103. A X-band Reconfigurable Phased Array Antenna System Using 0.13-mu m SiGe BiCMOS IC with 5-bit IF Phase Shifters Peer-reviewed

    Naoki Oshima, Ikuma Ando, Youichi Kitagishi, Eiichi Matsumura, Suguru Kameda, Noriharu Suematsu, Kazuaki Kunihiro

    2015 IEEE COMPOUND SEMICONDUCTOR INTEGRATED CIRCUIT SYMPOSIUM (CSICS)　2015

    DOI： 10.1109/CSICS.2015.7314486 　

    ISSN： 2162-7940

  104. Location-Based Virtual Sector Method for Interference Control in WLAN Multicell Environment Peer-reviewed

    Kohei Akimoto, Suguru Kameda, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2015 INTERNATIONAL CONFERENCE ON ICT CONVERGENCE (ICTC)　451-456　2015

    DOI： 10.1109/ICTC.2015.7354583 　

  105. Measured Evaluation of Positioning Accuracy on GNSS for Heterogeneous Wireless System Peer-reviewed

    Hiroshi Oguma, Keita Norishima, Konatsu Suehiro, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2015 INTERNATIONAL CONFERENCE ON ICT CONVERGENCE (ICTC)　442-445　2015

    DOI： 10.1109/ICTC.2015.7354581 　

  106. A Ku-Band Series/Shunt Switching Type S/H IC for Direct RF Under Sampling Reception Peer-reviewed

    Tomokazu Koizumi, Mizuki Motoyoshi, Daliso Banda, Osamu Wada, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2015 45TH EUROPEAN MICROWAVE CONFERENCE (EUMC)　897-900　2015

    DOI： 10.1109/EuMC.2015.7345909 　

    ISSN： 2325-0305

  107. A CMOS Series/Shunt Switching Type S/H IC for Ka-Band Direct RF Under Sampling Receiver Peer-reviewed

    T. Koizumi, K. Norishima, M. Motoyoshi, D. Banda, S. Kameda, N. Suematsu, T. Takagi, K. Tsubouchi

    2015 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC), VOLS 1-3　2015

    DOI： 10.1109/APMC.2015.7411669 　

  108. Traffic Navigation Using Positioning Information and Channel Quality Map for System-Wide Load Balancing Peer-reviewed

    Qinhan Liu, Junpei Kuboniwa, Suguru Kameda, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2015 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC), VOLS 1-3　2015

    DOI： 10.1109/APMC.2015.7411600 　

  109. Direct RF Undersampling Receiver for High-SHF Band Digital Beam Forming Invited Peer-reviewed

    Noriharu Suematsu, Suguru Kameda, Mizuki Motoyoshi

    2015 IEEE MTT-S INTERNATIONAL MICROWAVE AND RF CONFERENCE (IMARC)　133-135　2015

    DOI： 10.1109/IMaRC.2015.7411448 　

    ISSN： 2377-9144

  110. QZSS Short Message SS-CDMA Communication System: High Efficient Access Control Scheme Using Flag Signal Peer-reviewed

    T. Takahashhi, Y. Miyake, S. Kameda, A. Taira, F. Yamagata, H. Oguma, N. Suematsu, T. Takagi, K. Tsubouchi

    IEICE TRANS. COMMUN　J97-B　(11)　1096-1105　2014/11

    ISSN： 1881-0209

  111. QZSS ショートメッセージ SS-CDMA 通信システム:フラグ信号を用いた高効率アクセス制御方式 Peer-reviewed

    高橋 智英, 三宅 裕士, 亀田 卓, 平 明徳, 山形 文啓, 小熊 博, 末松 憲治, 高木 直, 坪内 和夫

    IEICE Transacsion　Vol.J97-B　(No.11)　1096-1105　2014/11

  112. Channel Quality Map Construction Scheme using Location Information for Heterogeneous Wireless Network Peer-reviewed

    H. Oguma, K. Norishima, A. Koizumi, J. Kuboniwa, S. Kameda, A. Taira, N. Suematsu, T. Takagi, K. Tsubouchi

    International Conference on Engineering and Technology 2014，Thailand　2014/11

    DOI： 10.11425/sst.4.83 　

  113. A 60 GHz-band 3-D BF Phased Array Antenna Module and RFIC (Invited) Invited Peer-reviewed

    N. Suematsu

    Glocal Symposium on Millimeter-Waves (GSMM)　2014/05

  114. Design of Finite FSS-backed Reflectarrayby Using BDP-CG Method Peer-reviewed

    Keisuke Konno, Qiang Chen, Suguru Kameda, Noriharu Suematsu

    Proc. The International Workshop on Antenna Technology (iWAT)　200-202　2014/03

    DOI： 10.1109/IWAT.2014.6958636 　

  115. A 2.0 GHz CMOS Triple Cascode Push-Pull Power Amplifier with Second Harmonic Injection for Linearity Enhancement Peer-reviewed

    Kazuma Terajima, Kenichi Fujii, Takuji Sonoda, Tadashi Takagi, Eita Nakayama, Suguru Kameda, Noriharu Suematsu, Kazuo Tsubouchi

    2014 9TH EUROPEAN MICROWAVE INTEGRATED CIRCUIT CONFERENCE (EUMIC)　321-324　2014

  116. A 60-GHz-band 2 x 4 planar dipole array antenna module fabricated by 3-D SiP technology Invited Peer-reviewed

    Noriharu Suematsu, Yuya Suzuki, Satoshi Yoshida, Shoichi Tanifuji, Suguru Kameda, Tadashi Takagi, Kazuo Tsubouchi

    INTERNATIONAL SYMPOSIUM ON INTERFACIAL JOINING AND SURFACE TECHNOLOGY (IJST2013)　61　2014

    DOI： 10.1088/1757-899X/61/1/012036 　

    ISSN： 1757-8981

  117. A 60-GHz-band 2 x 4 planar dipole array antenna module fabricated by 3-D SiP technology Peer-reviewed

    Noriharu Suematsu, Yuya Suzuki, Satoshi Yoshida, Shoichi Tanifuji, Suguru Kameda, Tadashi Takagi, Kazuo Tsubouchi

    INTERNATIONAL SYMPOSIUM ON INTERFACIAL JOINING AND SURFACE TECHNOLOGY (IJST2013)　61　(1)　1-6　2014

    DOI： 10.1088/1757-899X/61/1/012036 　

    ISSN： 1757-8981

  118. A Proposal of WLAN Control Scheme Using Separated Channel Peer-reviewed

    Minzhi Huang, Yuji Miyake, Suguru Kameda, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2014 IEEE 25TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATION (PIMRC)　2194-2198　2014

    ISSN： 2166-9570

  119. A Novel Cell Selection Scheme Using Positioning Information for Heterogeneous Wireless System Peer-reviewed

    Junpei Kuboniwa, Yuji Miyake, Suguru Kameda, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2014 IEEE 25TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATION (PIMRC)　2204-2208　2014

    ISSN： 2166-9570

  120. A Proposal of WLAN Control Scheme Using Separated Channel Peer-reviewed

    Minzhi Huang, Yuji Miyake, Suguru Kameda, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2014 IEEE 25TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATION (PIMRC)　2194-2198　2014

    DOI： 10.1109/PIMRC.2014.7136537 　

    ISSN： 2166-9570

  121. A Novel Cell Selection Scheme Using Positioning Information for Heterogeneous Wireless System Peer-reviewed

    Junpei Kuboniwa, Yuji Miyake, Suguru Kameda, Akinori Taira, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2014 IEEE 25TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATION (PIMRC)　2204-2208　2014

    DOI： 10.1109/PIMRC.2014.7136539 　

    ISSN： 2166-9570

  122. A 5GHz/60GHz Receiver Front-End IC in 90nm CMOS Technology Peer-reviewed

    R. Inagaki, T. Tanaka, M. Tsuru, E. Taniguchi, H. Fukumoto, S. Kameda, N. Suematsu, A. Taira, T. Takagi, K. Tsubouchi

    2014 9TH EUROPEAN MICROWAVE INTEGRATED CIRCUIT CONFERENCE (EUMIC)　21-24　2014

    DOI： 10.1109/EuMIC.2014.6997781 　

  123. A 2.0 GHz CMOS Triple Cascode Push-Pull Power Amplifier with Second Harmonic Injection for Linearity Enhancement Peer-reviewed

    Kazuma Terajima, Kenichi Fujii, Takuji Sonoda, Tadashi Takagi, Eita Nakayama, Suguru Kameda, Noriharu Suematsu, Kazuo Tsubouchi

    2014 44TH EUROPEAN MICROWAVE CONFERENCE (EUMC)　EuMC/EuMIC01-04　1265-1268　2014

    DOI： 10.1109/EuMIC.2014.6997857 　

    ISSN： 2325-0305

  124. Linearization of CMOS Triple Cascode Push-Pull Power Amplifiers by Second Harmonic Feedback Peer-reviewed

    Kazuma Terajima, Kenichi Fujii, Takuji Sonoda, Tadashi Takagi, Eita Nakayama, Suguru Kameda, Noriharu Suematsu, Kazuo Tsubouchi

    2014 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)　WE3B-2　107-109　2014

  125. Development of Satellite-Terrestrial Multi-Mode VSAT Using Software Defined Radio Technology Peer-reviewed

    Suguru Kameda, Tetsuya Okuguchi, Shigeru Eguchi, Noriharu Suematsu

    2014 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)　TH1A-5　411-413　2014

  126. A Series/Shunt Switching Type Sample and Hold. CMOS IC for 1 GHz-Band Direct RF Under Sampling Reception Peer-reviewed

    Tomokazu Koizumi, Mizuki Motoyoshi, Daliso Banda, Osamu Wada, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2014 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)　TH1B-5　426-428　2014

  127. The Improvement of Efficiency in L-band 10W GaN HEMT Power Amplifier by Harmonic Injection Peer-reviewed

    Kenichi Fujii, Kazuma Terajima, Takuji Sonoda, Tadashi Takagi, Suguru Kameda, Noriharu Suematsu, Kazuo Tsubouchi

    2014 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)　TH1G-19　786-788　2014

  128. Multi-Mode Portable VSAT for Disaster-Resilient Wireless Networks Invited Peer-reviewed

    N. Suematsu, S. Kameda, H. Oguma, M. Sasanuma, S. Eguchi, K. Kuroda

    2014 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)　TH2E-4　549-551　2014

  129. A Novel Channel Coding Scheme for Digital RF Transmitter Comprising a 1-bit Band-Pass Delta-Sigma Modulator Peer-reviewed

    Takashi Maehata, Suguru Kameda, Noriharu Suematsu

    2014 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)　TH3G-18　2014

  130. 1/2f(s) Direct RF under sampling reception in different RX channels Peer-reviewed

    Daliso Banda, Osamu Wada, Tuan Thanh Ta, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2014 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)　TH3G-23　2014

  131. System Stability of SS-CDMA Location and Short Message Communication using QZSS Peer-reviewed

    Akinori Taira, Yuji Miyake, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2014 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC)　TH3G-24　2014

  132. Advanced Wireless Information Technology (Suematsu and Kameda) Lab. Research Institute of Electrical Communication Tohoku University

    SUEMATSU Noriharu

    The Journal of Japan Institute for Interconnecting and Packaging Electronic Circuits　16　(7)　535-535　2013/11/01

    Publisher: The Japan Institute of Electronics Packaging

    DOI： 10.5104/jiep.16.535 　

    ISSN： 1343-9677

  133. Dependable Air and Wireless Dependability Invited Peer-reviewed

    T. Takagi, S. Kameda, N. Suematsu, K. Tsubouchi

    6th Global Symposium on Millimeter-Waves 2013 (GSMM2013)　2013/04/22

  134. Flip chip assembled 90nm CMOS 60GHz Receiver Front End with 7.5dB NF Peer-reviewed

    R. Inagaki, T. Tanaka, M. Tsuru, E. Taniguchi, S. Kameda, N. Suematsu, T. Takagi, K. Tsubouchi

    6th Global Symposium on Millimeter-Waves 2013 (GSMM2013)　2013/04/22

  135. A Si-CMOS 60 GHz Receiver for Phased Array Antenna with 7-stage LNA Peer-reviewed

    T. T. Ta, K. Gomyo, S. Tanifuji, S. Kameda, T. Takagi, N. Suematsu, K. Tsubouchi

    6th Global Symposium on Millimeter-Waves 2013 (GSMM2013)　2013/04/22

  136. Design of a 60 GHz Band 3-D Phased Array Antenna Module Using 3-D SiP Structure Peer-reviewed

    Yuya Suzuki, Satoshi Yoshida, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2013 PROCEEDINGS OF THE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP), VOLS 1 AND 2　2013

  137. Concurrent Dual-band 1-bit Digital Transmitter Using Band-Pass Delta-Sigma Modulator Peer-reviewed

    Takashi Maehata, Kazuyuki Totani, Suguru Kameda, Noriharu Suematsu

    2013 EUROPEAN MICROWAVE CONFERENCE (EUMC)　1523-1526　2013

    ISSN： 2325-0305

  138. A 60 GHz Band 2x4 Planar Dipole Phased Array Antenna Using Flip Chip Mounted MMIC Mixers Peer-reviewed

    Yuya Suzuki, Satoshi Yoshida, Tuan Thanh Ta, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2013 10TH EUROPEAN RADAR CONFERENCE (EURAD)　307-310　2013

  139. 6.3 Dependable Air(6. Connectivity,<Special Survey>Dependable VLSI System)

    TSUBOUCHI Kazuo, NAKAYAMA Masatoshi, KAMEDA Suguru, TAIRA Akinori, SUEMATSU Noriharu, TAKAGI Tadashi, MATSUZAWA Akira, IWATA Makoto, FUJISHIMA Minoru, OGUMA Hiroshi

    The Journal of Reliability Engineering Association of Japan　35　(8)　470-470　2013

    Publisher: 日本信頼性学会

    ISSN： 0919-2697

  140. ASIC Implementation of Multimode Frequency Domain EQuery Invited Peer-reviewed

    Yuji Miyake, Kazuhiro Komatsu, Hiroshi Oguma, Noboru Izuka, Suguru Kameda, Makoto Iwata, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2013 IEEE 24TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC)　397-402　2013

    ISSN： 2166-9570

  141. Measured Downlink Throughput Performance of MBWA System in Urban Area Peer-reviewed

    Suguru Kameda, Hiroshi Oguma, Noboru Izuka, Yasuyoshi Asano, Yoshiharu Yamazaki, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    IEICE TRANSACTIONS ON COMMUNICATIONS　E96B　(1)　329-334　2013/01

    DOI： 10.1587/transcom.E96.B.329 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  142. 5 GHz-Band CMOS Direct Digital RF Modulator Using Current-Mode DAC with Idle Current Peer-reviewed

    Osamu Wada, Tuan Thanh Ta, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2013 IEEE INTERNATIONAL WIRELESS SYMPOSIUM (IWS)　WE3B-1　2013

    DOI： 10.1109/IEEE-IWS.2013.6616844 　

    ISSN： 2161-5322

  143. A 60-GHz band planar dipole array antenna using 3-D sip structure in small wireless terminals for beamforming applications Peer-reviewed

    Satoshi Yoshida, Yuya Suzuki, Tuan Thanh Ta, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    IEEE Transactions on Antennas and Propagation　61　(7)　3502-3510　2013

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/TAP.2013.2257643 　

    ISSN： 0018-926X

  144. Refiectarray Design by Induced Electromotive Force Method Peer-reviewed

    Keisuke Konno, Qiang Chen, Kunio Sawaya, Suguru Kameda, Noriharu Suematsu

    2013 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI)　1342-+　2013

    DOI： 10.1109/APS.2013.6711331 　

    ISSN： 1522-3965

  145. ASIC implementation of multimode frequency domain equalizer for heterogeneous wireless system Peer-reviewed

    Yuji Miyake, Kazuhiro Komatsu, Hiroshi Oguma, Noboru Izuka, Suguru Kameda, Makoto Iwata, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC　397-402　2013

    DOI： 10.1109/PIMRC.2013.6666168 　

  146. Large-Capacity QZSS Location and Short Message System Using Frame Slotted ALOHA with Flag Method Peer-reviewed

    Tomohide Takahashi, Yuji Miyake, Fumihiro Yamagata, Hiroshi Oguma, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2013 IEEE 24TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC)　3280-3285　2013

    DOI： 10.1109/PIMRC.2013.6666713 　

    ISSN： 2166-9570

  147. A calibrationless Si-CMOS 5-bit baseband phase shifter using a fixed-gain-amplifier matrix Peer-reviewed

    Tuan Thanh Ta, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    IEICE Transactions on Electronics　E96-C　(10)　1322-1329　2013

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

    DOI： 10.1587/transele.E96.C.1322 　

    ISSN： 1745-1353 0916-8524

  148. Multi-Mode SDR VSAT against Big Disasters Invited Peer-reviewed

    Noriharu Suematsu, Suguru Kameda, Hiroshi Oguma, Mitsuru Sasanuma, Shigeru Eguchi, Komei Kuroda

    2013 EUROPEAN MICROWAVE CONFERENCE (EUMC)　842-845　2013

    ISSN： 2325-0305

  149. Concurrent Dual-band 1-bit Digital Transmitter Using Band-Pass Delta-Sigma Modulator Peer-reviewed

    Takashi Maehata, Kazuyuki Totani, Suguru Kameda, Noriharu Suematsu

    2013 8TH EUROPEAN MICROWAVE INTEGRATED CIRCUITS CONFERENCE (EUMIC)　552-555　2013

  150. A 60 GHz Band 2x4 Planar Dipole Phased Array Antenna Using Flip Chip Mounted MMIC Mixers Peer-reviewed

    Yuya Suzuki, Satoshi Yoshida, Tuan Thanh Ta, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2013 EUROPEAN MICROWAVE CONFERENCE (EUMC)　1619-1622　2013

    ISSN： 2325-0305

  151. 60-GHz band beam forming receiver RFIC for broadband communication phased array antenna module Peer-reviewed

    Tuan Thanh Ta, Mikoto Nakamura, Osamu Wada, Katsunori Gomyo, Yuya Suzuki, Satoshi Yoshida, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    Asia-Pacific Microwave Conference Proceedings, APMC　230-232　2013

    DOI： 10.1109/APMC.2013.6695103 　

  152. Direct RF under sampling reception method with lower sampling frequency Peer-reviewed

    Daliso Banda, Osamu Wada, Tuan Thanh Ta, Suguru Kameda, Noriharu Suematsu, Kazuo Tsubouchi

    Asia-Pacific Microwave Conference Proceedings, APMC　500-502　2013

    DOI： 10.1109/APMC.2013.6694844 　

  153. Hetero-Plane Beam Synthesis Using 60 GHz Band 3-D Phased Array Antenna Module Peer-reviewed

    Yuya Suzuki, Satoshi Yoshida, Suguru Kameda, Noriharu Suematsu, Akinori Taira, Tadashi Takagi, Kazuo Tsubouchi

    2014 IEEE RADIO & WIRELESS SYMPOSIUM (RWS)　34-36　2013

    DOI： 10.1109/RWS.2014.6830117 　

    ISSN： 2164-2958

  154. Dependable Air Invited Peer-reviewed

    K. Tsubouchi, S. Kameda, N. Suematsu

    IEICE Trans. Electron.　J95-C　(12)　460-469　2012/12/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 1345-2827

  155. 60 GHz Band 2x4 Dipole Array Antenna Using Multi Stacked Organic Substrates Structure Peer-reviewed

    Y. Suzuki, S. Yoshida, S. Tanifuji, S. Kameda, N. Suematsu, T. Takagi, Kazuo Tsubouchi

    The International Symposium on Antennas and Propagation (ISAP2012)　2012/10/29

  156. A 60 GHz-Band 3-Dimensional System-in-Package Transmitter Module with Integrated Antenna Invited Peer-reviewed

    Noriharu Suematsu, Satoshi Yoshida, Shoichi Tanifuji, Suguru Kameda, Tadashi Takagi, Kazuo Tsubouchi

    IEICE TRANSACTIONS ON ELECTRONICS　E95C　(7)　1141-1146　2012/07

    DOI： 10.1587/transele.E95.C.1141 　

    ISSN： 0916-8524

    eISSN： 1745-1353

  157. 60-GHz Band Copper Ball Vertical Interconnection for MMW 3-D System-in-Package Front-End Modules Peer-reviewed

    Satoshi Yoshida, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    IEICE TRANSACTIONS ON ELECTRONICS　E95C　(7)　1276-1284　2012/07

    DOI： 10.1587/transele.E95.C.1276 　

    ISSN： 0916-8524

    eISSN： 1745-1353

  158. Proposal of Heterogeneous Wireless Network with Handover in Application Layer: Feasibility Study Based on Field Trial Results Peer-reviewed

    Suguru Kameda, Hiroshi Oguma, Noboru Izuka, Fumihiro Yamagata, Yasuyoshi Asano, Yoshiharu Yamazaki, Shoichi Tanifuji, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    IEICE TRANSACTIONS ON COMMUNICATIONS　E95B　(4)　1152-1160　2012/04

    DOI： 10.1587/transcom.E95.B.1152 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  159. High ACLR 1-bit Direct Radio Frequency Converter Using Symmetric Waveform Peer-reviewed

    Takashi Maehata, Suguru Kameda, Noriharu Suematsu

    2012 7TH EUROPEAN MICROWAVE INTEGRATED CIRCUITS CONFERENCE (EUMIC)　671-674　2012

  160. A Si-CMOS 5-bit Baseband Phase Shifter Using Fixed Gain Amplifier Matrix Peer-reviewed

    Tuan Thanh Ta, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2012 42ND EUROPEAN MICROWAVE CONFERENCE (EUMC)　956-959　2012

    ISSN： 2325-0305

  161. Hybrid Single-Carrier and Multi-Carrier System: Evaluation of Throughput with Inter-Cell Interference Peer-reviewed

    Yuji Miyake, Fumihiro Yamagata, Hiroshi Oguma, Noboru Izuka, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2012 IEEE 23RD INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC)　2389-2394　2012

    DOI： 10.1109/PIMRC.2012.6362756 　

    ISSN： 2166-9570

  162. Flip-chip assembled 60GHz CMOS receiver front-end Peer-reviewed

    M. Tsuru, T. Tanaka, R. Inagaki, E. Taniguchi, M. Nakayama, S. Kameda, N. Suematsu, T. Takagi, K. Tsubouchi

    IEEE MTT-S International Microwave Workshop Series on Millimeter Wave Wireless Technology and Applications, IMWS 2012 - Proceeding　169-172　2012

    DOI： 10.1109/IMWS2.2012.6338241 　

  163. A Si-CMOS 5-bit Baseband Phase Shifter Using Fixed Gain Amplifier Matrix Peer-reviewed

    Tuan Thanh Ta, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2012 7TH EUROPEAN MICROWAVE INTEGRATED CIRCUITS CONFERENCE (EUMIC)　576-579　2012

  164. High ACLR 1-bit Direct Radio Frequency Converter Using Symmetric Waveform Peer-reviewed

    Takashi Maehata, Suguru Kameda, Noriharu Suematsu

    2012 42ND EUROPEAN MICROWAVE CONFERENCE (EUMC)　1051-1054　2012

    ISSN： 2325-0305

  165. 5 GHz-Band CMOS Direct Digital RF Modulator Using Current-Mode DAC Peer-reviewed

    Osamu Wada, Tuan Thanh Ta, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2012 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC 2012)　1118-1120　2012

    DOI： 10.1109/APMC.2012.6421843 　

  166. A 3-D Radiation Pattern Measurement Method for a 60-GHz-Band WPAN Phased Array Antenna Peer-reviewed

    Tuan Thanh Ta, Satoshi Yoshida, Yuya Suzuki, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2012 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC 2012)　139-141　2012

    DOI： 10.1109/APMC.2012.6421525 　

  167. A novel planar type broadband CMOS on-chip balun with relative bandwidth of 158% Peer-reviewed

    Tadashi Takagi, Eita Nakayama, Tuan Thanh Ta, Suguru Kameda, Noriharu Suematsu, Kazuo Tsubouchi

    2012 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC 2012)　178-180　2012

    DOI： 10.1109/APMC.2012.6421538 　

  168. 60GHz Antenna Integrated Transmitter Module Invited

    Noriharu Suematsu, Shoichi Tanifuji, Satoshi Yoshida, Yuya Suzuki, Suguru Kameda, Tadashi Takagi, Kazuo Tsubouchi

    2012 2ND IEEE CPMT SYMPOSIUM JAPAN　2012

    DOI： 10.1109/ICSJ.2012.6523437 　

    ISSN： 2373-5449

  169. Coverage Estimation of Uplink 64 QAM Signal Up to 20 MHz Bandwidth Based on Field Trial Results: Coverage Issue of Broadband Uplink Signal Peer-reviewed

    S. Kameda, H. Oguma, N. Izuka, Y. Asano, Y. Yamazaki, K. Komatsu, S. Tanifuji, N. Suematsu, T. Takagi, K. Tsubouchi

    The 14th Int. Symp. on Wireless Personal Multimedia Commun. (WPMC2011)　2011/10

  170. Hybrid Single-Carrier and Multi-Carrier System: Widening Uplink Coverage with Optimally Selecting SDM or Joint FDE/Antenna Diversity Peer-reviewed

    Y. Miyake, K. Kobayashi, K. Komatsu, S. Tanifuji, H. Oguma, N. Izuka, S. Kameda, N. Suematsu, T. Takagi, K. Tsubouchi

    The 14th Int. Symp. on Wireless Personal Multimedia Commun. (WPMC2011)　2011/10

  171. A High-Gain Planar Dipole Antenna for 60-GHz Band 3-D A High-Gain Planar Dipole Antenna for 60-GHz Band 3-D Peer-reviewed

    S. Yoshida, S. Tanifuji, S. Kameda, N. Suematsu, T. Takagi, K. Tsubouchi

    2011 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting　IF246.2　2011/07

  172. A Low Cross Polarization 5 GHz-Band 3-Stacked Meander-Line Antenna Integrated with a Meander-Line Shape Balun Peer-reviewed

    S. Yoshida, S. Tanifuji, S. Kameda, N. Suematsu, T. Takagi, K. Tsubouchi

    5th European Conference on Antennas and Propagation (EuCAP)　2011/04

  173. Si-RFIC technologies for multi-band multi-mode wireless terminals Invited Peer-reviewed

    N.Suematsu

    2011 China-Japan Microwave Conference (CJMW2011)　1-4　2011/04

  174. A High-Gain Planar Dipole Antenna for 60-GHz Band 3-D System-in-Package Modules Peer-reviewed

    Satoshi Yoshida, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2011 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (APSURSI)　1311-1314　2011

    ISSN： 1522-3965

  175. Recent Trends and Prospects of RF Circuits for Cognitive Radios

    M.Shimozawa, N.Suematsu, H.Harada, S.Narahashi, H.Okazaki

    Journal of IEICE　94　(1)　39-42　2011

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5693

  176. Proposal of heterogeneous wireless communication network with soft handover in application layer: Feasibility study based on field trial results Peer-reviewed

    S. Kameda, H. Oguma, N. Izuka, F. Yamagata, Y. Asano, Y. Yamazaki, S. Tanifuji, N. Suematsu, T. Takagi, K. Tsubouchi

    Proceedings of the 2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011　211-215　2011

    DOI： 10.4108/icst.crowncom.2011.245821 　

  177. ASIC implementation of frequency domain equalizer for single carrier transmission Peer-reviewed

    Kazuhiro Komatsu, Suguru Kameda, Makoto Iwata, Shoichi Tanifuji, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011　2011

    DOI： 10.1109/URSIGASS.2011.6050497 　

  178. High sampling rate 1 GS/s current mode pipeline ADC in 90 nm Si-CMOS process Invited Peer-reviewed

    Shoichi Tanifuji, Kei Ando, Tuan Thanh Ta, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2011 IEEE MTT-S International Microwave Workshop Series on Intelligent Radio for Future Personal Terminals, IMWS-IRFPT 2011　2011

    DOI： 10.1109/IMWS2.2011.6027168 　

  179. 24.8 dBm Power Handling 60 GHz Transmit/Receive Switch Using Series and Shunt FETs in 90 nm Si-CMOS Process Peer-reviewed

    Shoichi Tanifuji, Noriharu Suematsu, Suguru Kameda, Tadashi Takagi, Kazuo Tsubouchi

    2011 6TH EUROPEAN MICROWAVE INTEGRATED CIRCUIT CONFERENCE　216-219　2011

  180. A High Efficiency Si-CMOS Power Amplifier for 60 GHz Band Broadband Wireless Communication Employing Optimized Transistor Size Peer-reviewed

    Tuan Thanh Ta, Keisuke Matsuzaki, Kei Ando, Katsunori Gomyo, Eita Nakayama, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2011 41ST EUROPEAN MICROWAVE CONFERENCE　151-154　2011

    ISSN： 2325-0305

  181. 60GHz Antenna Integrated Transmitter Module Using 3-D SiP Technology and Organic Substrates Invited Peer-reviewed

    Noriharu Suematsu, Satoshi Yoshida, Shoichi Tanifuji, Suguru Kameda, Tadashi Takagi, Kazuo Tsubouchi

    2011 41ST EUROPEAN MICROWAVE CONFERENCE　551-554　2011

    ISSN： 2325-0305

  182. A 60-GHz Band WPAN Transmitter Module Integrated with a Planar Dipole Antenna Using Organic Substrates and 3-D SiP Technology Invited Peer-reviewed

    Satoshi Yoshida, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2011 IEEE ELECTRICAL DESIGN OF ADVANCED PACKAGING AND SYSTEMS SYMPOSIUM (EDAPS)　2011

    DOI： 10.1109/EDAPS.2011.6213759 　

    ISSN： 2151-1225

  183. Analog Pre-Distortion Linearizer Using Self Base Bias Controlled Amplifier Peer-reviewed

    Shintaro Shinjo, Kazutomi Mori, Keiki Yamada, Noriharu Suematsu, Mitsuhiro Shimozawa

    IEICE TRANSACTIONS ON ELECTRONICS　E93C　(7)　966-974　2010/07

    DOI： 10.1587/transele.E93.C.966 　

    ISSN： 0916-8524

    eISSN： 1745-1353

  184. Coverage estimation of downlink 64 QAM signal up to 20 MHz bandwidth based on field trial results of FH-OFDMA system Peer-reviewed

    H. Oguma, S. Kameda, N. Izuka, Y. Asano, Y. Yamazaki, N. Suematsu, T. Takagi, K. Tsubouchi

    12th IEEE International Conference on Communication Systems 2010, ICCS 2010　600-605　2010

    DOI： 10.1109/ICCS.2010.5686529 　

  185. Copper Balls Interconnection Technology for 60 GHz Band 3-D System-in-Package Modules Peer-reviewed

    Satoshi Yoshida, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2010 ASIA-PACIFIC MICROWAVE CONFERENCE　904-907　2010

  186. 5 GHz Band Low Phase Noise Si-CMOS Oscillator with Flip-chip Mounted FBAR Peer-reviewed

    Tuan Thanh Ta, Kei Ando, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2010 ASIA-PACIFIC MICROWAVE CONFERENCE　1039-1042　2010

  187. Influence of Hand Tremor for 60-GHz-Band Broadband Wireless Communication Terminal Based on Advanced Kiosk Model Peer-reviewed

    Shunsuke Tomita, Ngoc Hao Tran, Yuji Miyake, Kazuhiro Komatsu, Hiroshi Oguma, Noboru Izuka, Shoichi Tanifuji, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    2010 ASIA-PACIFIC MICROWAVE CONFERENCE　1537-1540　2010

  188. Measured Downlink Throughput Performance of Mobile Broadband Wireless Access System in Suburban Area Peer-reviewed

    H. Oguma, S. Kameda, N. Izuka, Y. Asano, Y. Yamazaki, N. Suematsu, T. Takagi, K. Tsubouchi

    2010 ASIA-PACIFIC MICROWAVE CONFERENCE　1545-1548　2010

  189. 0.4-5.8 GHz SiGe-MMIC Quadrature Modulator Employing Self Current Controlled Mixer for Cognitive Radio Peer-reviewed

    Shintaro Shinjo, Fumiki Onoma, Koji Tsutsumi, Noriharu Suematsu, Mitsuhiro Shimozawa, Hiroshi Harada

    IEICE TRANSACTIONS ON COMMUNICATIONS　E92B　(12)　3701-3710　2009/12

    DOI： 10.1587/transcom.E92.B.3701 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  190. A 2 to 5 GHz-Band Self Frequency Dividing Quadrature Mixer Using Current Re-Use Configuration Peer-reviewed

    Eiji Taniguchi, Mitsuhiro Shimozawa, Noriharu Suematsu

    IEICE TRANSACTIONS ON COMMUNICATIONS　E92B　(12)　3711-3716　2009/12

    DOI： 10.1587/transcom.E92.B.3711 　

    ISSN： 0916-8516

    eISSN： 1745-1345

  191. RF-IC for Multi-Band Multi-Mode Transceiver Peer-reviewed

    Mitsuhiro Shimozawa, Noriharu Suematsu, Hiroshi Harada

    2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications　3311-3315　2009

  192. Si-RFICs for Multi-Band Multi-Mode Transceivers Invited Peer-reviewed

    Kenji Suematsu, Hiroshi Harada

    IEICE Trans. Communications　J91-B　(11)　1339-1350　2008/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 1344-4697

  193. A 5GHz-band SiGe-MMIC transceiver for 324Mbps transmission

    Hiro-omi Ueda, Kensuke Nakajima, Gakushi Kanazawa, Mitsuhiro Shimozawa, Jun Koide, Mikio Uesugi, Ryosuke Takeuchi, Noriharu Suematsu, Yoji Isota, Suguru Kameda, Hiroyuki Nakase, Tadashi Takagi, Kazuo Tsubouchi

    2008 IEEE RADIO AND WIRELESS SYMPOSIUM, VOLS 1 AND 2　791-+　2008

    ISSN： 2164-2958

  194. High linearity SiGe-MMIC Q-MOD having self mixer current control circuit with output power detector for 0.4-5.8GHz cognitive radio transceiver Peer-reviewed

    Shintaro Shinjo, Koji Tsutsumi, Fumiki Onoma, Noriharu Suematsu, Hiroshi Harada

    2008 IEEE Radio Frequency Integrated Circuits Symposium, VOLS 1 AND 2　167-+　2008

    ISSN： 1529-2517

  195. A low spurious 400M-6GHz SiGe-MMIC direct conversion transceiver using 2fLO LO switching configuration for cognitive radio Peer-reviewed

    Koji Tsutsumi, Fumiki Onoma, Jun Koide, Mikio Uesugi, Noriharu Suematsu, Hiroshi Harada

    IEEE Radio Frequency Integrated Circuits Symposium　585-588　2008

    DOI： 10.1109/RFIC.2008.4561505 　

    ISSN： 1529-2517

  196. 2 fLO局発切り替え方式 コグニティブ無線用 低送信スプリアスSiGe-MMIC送受信ダイレクトコンバータ

    堤 恒次, 小野間 史樹, 小出 純, 上杉 美喜夫, 末松 憲治, 原田 博司

    Technical Report of IEICE　SR2007-84　115-120　2008/01

  197. A 5GHz-band SiGe-MMIC Transceiver for 324Mbps Transmission Peer-reviewed

    H. Ueda, K. Nakajima, G. Kanazawa, M. Shimozawa, J. Koide, M. Uesugi, R. Takeuchi, N. Suematsu, Y. Isota, S. Kameda, H. Nakase, T. Takagi, K.Tsubouchi

    Proc. IEEE RWS 2008　2008/01

    DOI： 10.1109/RWS.2008.4463611 　

  198. A 5.2 GHz linearized SiGe quadrature modulator using current feedback from output buffer Peer-reviewed

    Fumiki Onoma, Koji Tsutsumi, Shintaro Shinjo, Noriharu Suematsu

    2007 KOREA-JAPAN MICROWAVE CONFERENCE, TECHNICAL DIGEST　49-52　2007

  199. A balanced even harmonic quadrature mixer using anti parallel diode pairs Peer-reviewed

    Mitsuhiro Shimozawa, Noriharu Suematsu, Kenji Itoh, Yoji Isota

    IEICE TRANSACTIONS ON ELECTRONICS　E89C　(12)　1821-1828　2006/12

    DOI： 10.1093/ietele/e89-c.12.1821 　

    ISSN： 0916-8524

    eISSN： 1745-1353

  200. 0.8-5.2GHz Broad-Band SiGe-MMIC Quadrature Mixer for Software Defined Radio Receiver

    MURAKAMI Keishi, SUEMATSU Noriharu, TSUTSUMI Koji, KANAZAWA Gakushi, SEKINE Tomotsugu, KUBO Hiroshi, ISOTA Yoji

    IEEJ Transactions on Electronics, Information and Systems　126　(9)　1093-1100　2006/09/01

    Publisher: The Institute of Electrical Engineers of Japan

    DOI： 10.1541/ieejeiss.126.1093 　

    ISSN： 0385-4221

    More details Close

    For the next generation wireless terminals used in the software defined radio (SDR), multi-band / multi-mode transceivers and their MMIC are required which cover the wide RF frequency range from several hundreds MHz up to several GHz. In this paper, 0.8-5.2GHz broad-band SiGe-MMIC quadrature mixer (Q-MIX) for multi-band / multi-mode direct conversion receiver has been developed. By using a static type frequency divider as a 90 degrees local (LO) power divider, measured error vector magnitude (EVM) of less than 3.1% can be achieved in the cases of 0.8/2.1GHz W-CDMA and 5.2GHz wireless Local Area Network (LAN) (IEEE 802.11a) reception. This Q-MIX also shows broad-band characteristic for base-band signal and is applicable for 4G cellular. By using fabricated Q-MIX, a multi-band / multi-mode (1.9GHz (3rd generation cellular (W-CDMA)) / 5.2GHz (4th generation cellular (Multi-Carrier (MC)-CDMA))) receiver has been developed and it has firstly demonstrated the successful reception of motion picture via W-CDMA and MC-CDMA.

  201. An even harmonic quadrature mixer with a simple filter configuration and an integrated LTCC module for W-CDMA direct conversion receiver Peer-reviewed

    M Shimozawa, K Maeda, E Taniguchi, K Sadahiro, T Ikushima, T Nishinw, N Suematsu, K Itoh, Y Isota, T Takagi

    IEICE TRANSACTIONS ON ELECTRONICS　E89C　(4)　473-481　2006/04

    DOI： 10.1093/ietele/e89-c.4.473 　

    ISSN： 0916-8524

    eISSN： 1745-1353

  202. A 2GHz-band self frequency dividing quadrature mixer Peer-reviewed

    E Taniguchi, C Kageyama, N Suematsu

    2005 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS (RFIC) SYMPOSIUM, DIGEST OF PAPERS　505-508　2005

    ISSN： 1529-2517

  203. 21.5-dBm power-handling 5-GHz transmit/receive CMOS switch realized by voltage division effect of stacked transistor configuration with depletion-layer-extended transistors (DETs) Peer-reviewed

    T Ohnakado, S Yamakawa, T Murakami, A Furukawa, E Taniguchi, H Ueda, N Suematsu, T Oomori

    IEEE JOURNAL OF SOLID-STATE CIRCUITS　39　(4)　577-584　2004/04

    DOI： 10.1109/JSSC.2004.825231 　

    ISSN： 0018-9200

  204. Ultra-High Speed Devices for Wireless Communication Terminals (Current Status and Prospects)

    SUEMATSU Noriharu

    IEEJ Transactions on Electronics, Information and Systems　124　(2)　296-302　2004/02/01

    Publisher: The Institute of Electrical Engineers of Japan

    DOI： 10.1541/ieejeiss.124.296 　

    ISSN： 0385-4221

    More details Close

    The technical trend of compound and Si ultra-high speed devices for wireless communication terminals is described. The choice of compound or Si devices depends on the RF frequency range and the required RF handling power. For high frequency applications and for high RF power circuit block, the compound devices still be used and new devices such as InGaP HBT has been developed. If the frequency range is below 6GHz, and the output power is limited, Si devices are becoming common for the transceiver system IC. Based on the device trends, the technical requirements for the ultra-high-speed devices for present and next-generation wireless applications are described. Developments of compound HBT PA and SiGe-RFIC's for 3G (W-CDMA) terminals are also described and the circuit techniques used in these RF devices are introduced.

  205. 0.8-5.2GHz band SiGe-MMIC Q-MIX for a multi-band direct convertion receiver Peer-reviewed

    C Kageyama, K Nakajima, K Tsutsumi, E Taniguchi, M Shimozawa, N Suematsu

    RAWCON: 2004 IEEE RADIO AND WIRELESS CONFERENCE, PROCEEDINGS　211-214　2004

  206. A low quiescent current CV/CC parallel operation HBT power amplifier for W-CDMA terminals Peer-reviewed

    S Shinjo, K Mori, H Ueda, A Ohta, H Seki, N Suematsu, T Takagi

    IEICE TRANSACTIONS ON ELECTRONICS　E86C　(8)　1444-1450　2003/08

    ISSN： 0916-8524

    eISSN： 1745-1353

  207. An even harmonic mixer using self-biased anti-parallel diode pair Peer-reviewed

    M Shimozawa, T Katsura, K Maeda, E Taniguchi, T Ikushima, N Suematsu, K Itoh, Y Isota, T Takagi

    IEICE TRANSACTIONS ON ELECTRONICS　E86C　(8)　1464-1471　2003/08

    ISSN： 1745-1353

  208. A 0.8-dB insertion-loss, 17.4-dBm power-handling, 5-GHz transmit/receive switch with DETs in a 0.18-mu m CMOS process Peer-reviewed

    T Ohnakado, S Yamakawa, T Murakami, A Furukawa, K Nishikawa, E Taniguchi, H Ueda, M Ono, J Tomisawa, Y Yoneda, Y Hashizume, K Sugahara, N Suematsu, T Oomori

    IEEE ELECTRON DEVICE LETTERS　24　(3)　192-194　2003/03

    DOI： 10.1109/LED.2003.811404 　

    ISSN： 0741-3106

  209. A dual bias-feed circuit design for SiGe HBT low-noise linear amplifier Peer-reviewed

    E Taniguchi, T Ikushima, K Itch, N Suematsu

    IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES　51　(2)　414-421　2003/02

    DOI： 10.1109/TMTT.2002.807835 　

    ISSN： 0018-9480

  210. Low quiescent current SiGe HBT driver amplifier having self base bias control circuit Peer-reviewed

    S Shinjo, K Mori, H Joba, N Suematsu, T Takagi

    IEICE TRANSACTIONS ON ELECTRONICS　E85C　(7)　1404-1411　2002/07

    ISSN： 0916-8524

    eISSN： 1745-1353

  211. A 2 GHz-band even harmonic type SiGe-MMIC direct conversion CECCTP mixer Peer-reviewed

    E Taniguchi, K Maeda, C Sawaumi, N Suematsu

    IEICE TRANSACTIONS ON ELECTRONICS　E85C　(7)　1412-1418　2002/07

    ISSN： 0916-8524

    eISSN： 1745-1353

  212. Integrated even harmonic type direct conversion receiver for W-CDMA mobile terminals (Invited paper) Peer-reviewed

    K Itoh, T Yamaguchi, T Katsura, K Sadahiro, T Ikushima, R Hayashi, F Ishizu, E Taniguchi, T Nishino, M Shimozawa, N Suematsu, T Takagi, O Ishida

    2002 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-3　9-12　2002

    ISSN： 0149-645X

  213. Integrated even harmonic type direct conversion receiver for W-CDMA mobile terminals (Invited paper) Peer-reviewed

    K Itoh, T Yamaguchi, T Katsura, K Sadahiro, T Ikushima, R Hayashi, F Ishizu, E Taniguchi, T Nishino, M Shimozawa, N Suematsu, T Takagi, O Ishida

    2002 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS (RFIC) SYMPOSIUM, DIGEST OF PAPERS　263-266　2002

    ISSN： 1529-2517

  214. An even harmonic type direct conversion SiGe-MMIC receiver for W-CDMA mobile terminals Peer-reviewed

    E Taniguchi, M Shimozawa, T Ikushima, K Sadahiro, T Katsura, K Maeda, K Itoh, N Suematsu, T Takagi, O Ishida

    2002 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS (RFIC) SYMPOSIUM, DIGEST OF PAPERS　133-136　2002

    ISSN： 1529-2517

  215. Si substrate resistivity design for on-chip matching circuit based on electro-magnetic simulation Peer-reviewed

    M Ono, N Suematsu, S Kubo, K Nakajima, Y Iyama, T Takagi, O Ishida

    IEICE TRANSACTIONS ON ELECTRONICS　E84C　(7)　923-930　2001/07

    ISSN： 0916-8524

    eISSN： 1745-1353

  216. Dual bias feed SiGe HBT low noise linear amplifier Peer-reviewed

    E Taniguchi, K Maeda, T Ikushima, K Sadahiro, K Itoh, N Suematsu, T Takagi

    2001 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-3　285-288　2001

    ISSN： 0149-645X

  217. Dual bias feed SiGe HBT low noise linear amplifier Peer-reviewed

    E Taniguchi, K Maeda, T Ikushima, K Sadahiro, K Itoh, N Suematsu, T Takagi

    2001 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS (RFIC) SYMPOSIUM, DIGEST OF PAPERS　227-230　2001

    ISSN： 1529-2517

  218. 2GHz band even harmonic type direct conversion receiver with ABB-IC for W-CDMA mobile terminal Peer-reviewed

    K Itoh, T Katsura, K Nagano, T Yamaguchi, Y Hamade, M Shimozawa, N Suematsu, R Hayashi, W Palmer, M Goldfarb

    2000 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-3　1957-1960　2000

    ISSN： 0149-645X

  219. A passive-type Even Harmonic Quadrature Mixer using Simple Filter Configuration for Direct Conversion Receiver Peer-reviewed

    M Shimozawa, T Katsura, N Suematsu, K Itoh, Y Isota, O Ishida

    2000 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-3　517-520　2000

    ISSN： 0149-645X

  220. Intermodulation distortion of low noise silicon BJT and MOSFET fabricated in BiCMOS process Peer-reviewed

    N Suematsu, M Ono, S Kubo, M Uesugi, K Hasegawa, K Hiroshige, Y Iyama, T Takagi, O Ishida

    IEICE TRANSACTIONS ON ELECTRONICS　E82C　(5)　692-698　1999/05

    ISSN： 0916-8524

    eISSN： 1745-1353

  221. A 1.9 GHz single-chip RF front-end GaAs MMIC with low-distortion cascode FET mixer Peer-reviewed

    M Nakayama, K Horiguchi, K Yamamoto, Y Yoshii, S Sugiyama, N Suematsu, T Takagi

    IEICE TRANSACTIONS ON ELECTRONICS　E82C　(5)　717-724　1999/05

    ISSN： 1745-1353

  222. Even harmonic type direct conversion receiver ICs for mobile handsets: Design challenges and solutions Invited Peer-reviewed

    K Itoh, M Shimozawa, N Suematsu, O Ishida

    1999 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS (RFIC) SYMPOSIUM - DIGEST OF PAPERS　53-56　1999

    ISSN： 1529-2517

  223. 1.9GHz/5.8GHz-band on-chip matching Si-MMIC low noise amplifiers fabricated on high resistive Si substrate Peer-reviewed

    M Ono, N Suematsu, S Kubo, Y Iyama, T Takagi, O Ishida

    1999 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-4　493-496　1999

    ISSN： 0149-645X

  224. 1.9GHz/5.8GHz-band on-chip matching Si-MMIC low noise amplifiers fabricated on high resistive Si substrate Peer-reviewed

    M Ono, N Suematsu, S Kubo, Y Iyama, T Takagi, O Ishida

    1999 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS (RFIC) SYMPOSIUM - DIGEST OF PAPERS　189-192　1999

    ISSN： 1529-2517

  225. A 1.9GHz even harmonic type direct conversion Si-MMIC receiver Peer-reviewed

    Shigeru Sugiyama, Noriharu Suematsu, Masayoshi Ono, Mitsuhiro Shimozawa, Shunji Kubo, Kenji Itoh, Yoshitada Iyama, Osami Ishida

    1998 28th European Microwave Conference, EuMC 1998　2　628-632　1998

    Publisher: IEEE Computer Society

    DOI： 10.1109/EUMA.1998.338227 　

  226. A 1.9GHz single-chip RF front-end GaAs MMIC with low-distortion cascode FET mixer for personal handy-phone system terminals Peer-reviewed

    M Nakayama, K Horiguchi, K Yamamoto, Y Yoshii, S Sugiyama, N Suematsu, T Takagi

    1998 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS (RFIC) SYMPOSIUM　205-208　1998

  227. A 1.9GHz single-chip RF front-end GaAs MMIC with low-distortion cascode FET mixer for personal handy-phone system terminals Peer-reviewed

    M Nakayama, K Horiguchi, K Yamamoto, Y Yoshii, S Sugiyama, N Suematsu, T Takagi

    1998 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-3　171-174　1998

    ISSN： 0149-645X

  228. Transfer characteristic of IM3 relative phase for a GaAs FET amplifier Peer-reviewed

    N Suematsu, Y Iyama, O Ishida

    IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES　45　(12)　2509-2514　1997/12

    DOI： 10.1109/22.643867 　

    ISSN： 0018-9480

  229. L-Band SPDT Switch Using Si-MOSFET.

    Iyama Yoshitada, Suematsu Noriharu

    The Journal of Japan Institute for Interconnecting and Packaging Electronic Circuits　13　(3)　10-16　1997

    Publisher: The Japan Institute of Electronics Packaging

    DOI： 10.5104/jiep1993.13.3_10 　

    ISSN： 0919-4398

  230. L-band internally matched Si-MMIC front-end Peer-reviewed

    N Suematsu, M Ono, S Kubo, Y Iyama, O Ishida

    IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES　44　(12)　2375-2378　1996/12

    DOI： 10.1109/22.554564 　

    ISSN： 0018-9480

  231. L-band SPDT switch using Si-MOSFET Peer-reviewed

    Y Iyama, N Suematsu, T Shigematsu, T Moriwaki, T Ikeda

    IEICE TRANSACTIONS ON ELECTRONICS　E79C　(5)　636-643　1996/05

    ISSN： 0916-8524

    eISSN： 1745-1353

  232. Simple calculation method of the intermodulation distortion of multiple-carrier amplifiers operating in weakly nonlinear region Peer-reviewed

    N Suematsu, A Iida, T Takagi, S Urasaki

    ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS　78　(10)　44-51　1995/10

    DOI： 10.1002/ecjb.4420781006 　

    ISSN： 8756-663X

  233. INTERMODULATION AND NOISE POWER RATIO ANALYSIS OF MULTIPLE-CARRIER AMPLIFIERS USING DISCRETE FOURIER-TRANSFORM Peer-reviewed

    T TAKAGI, S OGURA, Y IKEDA, N SUEMATSU

    IEICE TRANSACTIONS ON ELECTRONICS　E77C　(6)　935-941　1994/06

    ISSN： 0916-8524

    eISSN： 1745-1353

Show all ︎Show first 5

Misc. 438

  1. Evaluation of Detectable Range of In-body Communication in RFID Partial Denture Management System

    高寺裕二, 高寺裕二, 古市朋之, 本良瑞樹, 末松憲治

    電子情報通信学会技術研究報告(Web)　123　(365(ED2023 65-81))　2024

    ISSN： 2432-6380

  2. Effects of Elevation Mask on Kinematic Positioning

    山形文啓, 小熊博, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2023　2023

    ISSN： 1349-144X

  3. Scalable transmission line modeling for over 100 GHz CMOS amplifier

    青木拓海, 青木拓海, 古市朋之, 本良瑞樹, 末松憲治

    電子情報通信学会技術研究報告(Web)　122　(411(MW2022 157-178))　2023

    ISSN： 2432-6380

  4. Novel digital-to-analog converter immune to asymmetric transition waveform distortion in bandpass delta-sigma modulators

    前畠貴, 前畠貴, 本良瑞樹, 本良瑞樹, 末松憲治

    電子情報通信学会技術研究報告(Web)　123　(109(SR2023 26-44))　2023

    ISSN： 2432-6380

  5. Effects of Elevation Mask and SNR Mask on Kinematic Positioning

    山形文啓, 小熊博, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2023　2023

    ISSN： 1349-144X

  6. Multi-stage 130 GHz CMOS Amplifier by Stacked Radial Stub

    青木拓海, 青木拓海, 町井大輝, 町井大輝, 古市朋之, 本良瑞樹, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2022　2022

    ISSN： 1349-144X

  7. A Design of Clock Fall Time for 60 GHz-band S/H Circuit using Simple Circuit Model

    古市朋之, 本良瑞樹, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2022　2022

    ISSN： 1349-144X

  8. A Design of Clock Fall Time for 60 GHz-band S/H Circuit using Simple Circuit Model

    古市朋之, 本良瑞樹, 末松憲治

    電子情報通信学会技術研究報告(Web)　122　(313(MW2022 131-144))　2022

    ISSN： 2432-6380

  9. Kinematic Positioning Accuracy using Own Reference Station in Kushiro(3)

    山形文啓, 白瀬佳就, 小熊博, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2022　2022

    ISSN： 1349-144X

  10. Evaluation of Satellite Signal Reception Errors on GPS/QZSS/BeiDou in Middle SVF Environments

    北寛登, 小熊博, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2022　2022

    ISSN： 1349-144X

  11. Kinematic Positioning Accuracy using Own Reference Station in Kushiro(4)

    山形文啓, 白瀬佳就, 小熊博, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2022　2022

    ISSN： 1349-144X

  12. QZSS Short Message SS-CDMA Communication System-Evaluation of Satellite Signal Reception Error due to SVF-

    北寛登, 小熊博, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　122　(243(SR2022 45-70))　2022

    ISSN： 2432-6380

  13. 5 GHz-Band Simplified Beam Forming Wireless IoT Communication Using Wi-Fi Backscatter

    末松憲治, 枝松航輝, 枝松航輝, 枝松航輝, 町井大輝, 町井大輝, TEMGA Jean, 本良瑞樹, 本良瑞樹, 亀田卓, 亀田卓, 芝隆司

    電子情報通信学会論文誌 C(Web)　J105-C　(1)　2022

    ISSN： 1881-0217

  14. 10GbE Fiber Transmission 7.5GHz-Band DBF Using 1-bit Direct Digital RF Transmitter

    末松憲治, 田村涼, 田村涼, 本良瑞樹, 亀田卓

    電子情報通信学会技術研究報告(Web)　121　(345(SR2021 58-84))　2022

    ISSN： 2432-6380

  15. Link Design and Received Power Measurement of 5-GHz Band Wi-Fi Backscatter System

    町井大輝, 町井大輝, 枝松航輝, 枝松航輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　121　(392(SR2021 85-120))　2022

    ISSN： 2432-6380

  16. A Simple Spectrum Reconstruction Method in Direct RF Undersampling Receiver for Real-Time Spectrum Monitor

    古市朋之, 古市朋之, 秋元浩平, 秋元浩平, 本良瑞樹, 本良瑞樹, 亀田卓, 亀田卓, 芝隆司, 末松憲治

    電子情報通信学会論文誌 C(Web)　J105-C　(4)　2022

    ISSN： 1881-0217

  17. A 60 GHz-band S/H CMOS IC for Direct RF Undersampling Reception

    古市朋之, 古市朋之, 吉野長浩, 吉野長浩, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　121　(400(MW2021 111-138))　2022

    ISSN： 2432-6380

  18. 130 GHz Band CMOS Amplifier with Miniaturized Interstage Circuit by Stacked Radial Stub

    町井大輝, 町井大輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　121　(400(MW2021 111-138))　2022

    ISSN： 2432-6380

  19. 5 GHz-Band Simplified Beam Forming Wireless IoT Communication using Wi-Fi Backscatter

    古市朋之, 枝松航輝, TEMGA Jean, 本良瑞樹, 亀田卓, 芝隆司, 末松憲治

    電子情報通信学会技術研究報告(Web)　122　(243(SR2022 45-70))　2022

    ISSN： 2432-6380

  20. Formulization for Output Power Spectral Density of 1Bit Direct Digital RF Transmitter Using Different Coding

    ZHANG Junhao, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2021　2021

    ISSN： 1349-144X

  21. Gain Improvement of 130 GHz CMOS Amplifier by Using Radial Stub as AC Ground

    町井大輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2021　2021

    ISSN： 1349-144X

  22. Evolution and Prospect of Digital RF Transceiver Technologies

    末松憲治, 本良瑞樹, 亀田卓

    電子情報通信学会技術研究報告(Web)　120　(404(RCS2020 203-261))　2021

    ISSN： 2432-6380

  23. A Sampling Frequencies Design Algorithm for Frequency Determination in Direct RF Undersampling Multiband Reception

    古市朋之, 本良瑞樹, 亀田卓, 芝隆司, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2021　2021

    ISSN： 1349-144X

  24. Fundamental Investigation of Multiple Access Method for 5-GHz Band Simplified Beam Forming Wireless IoT Communication Using Wi-Fi Backscatter

    亀田卓, 枝松航輝, 本良瑞樹, 芝隆司, 末松憲治

    電子情報通信学会技術研究報告(Web)　120　(405(SR2020 60-90))　2021

    ISSN： 2432-6380

  25. Wireless IoT Real Time Spectrum Monitor Based on Direct RF Undersampling Reception Technique

    末松憲治, 古市朋之, 古市朋之, 本良瑞樹, 亀田卓, 芝隆司

    電子情報通信学会技術研究報告(Web)　121　(30(SR2021 1-19))　2021

    ISSN： 2432-6380

  26. ラジアルスタブを整合回路のACグランドとして用いた130GHz帯CMOS増幅器

    町井大輝, 町井大輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　121　(254(MW2021 66-83))　2021

    ISSN： 2432-6380

  27. Series-Series Feedback D-band CMOS Amplifier using a Radial Stub for Source Grounding

    町井大輝, 町井大輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　121　(303(MW2021 84-103))　2021

    ISSN： 2432-6380

  28. Kinematic Positioning Accuracy using Own Reference Station in Kushiro

    山形文啓, 小熊博, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2021　2021

    ISSN： 1349-144X

  29. Kinematic Positioning Accuracy using Own Reference Station in Kushiro(2)

    山形文啓, 小熊博, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2021　2021

    ISSN： 1349-144X

  30. Evaluation of Satellite Signal Reception Errors on GPS/QZSS/BeiDou in Low SVF Environments

    北寛登, 小熊博, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2021　2021

    ISSN： 1349-144X

  31. A Spectrum Regeneration and Demodulation Method for Multiple Direct Undersampled Real Signals

    SHIBA Takashi, FURUICHI Tomoyuki, MOTOYOSHI Mizuki, KAMEDA Suguru, SUEMATSU Noriharu

    IEICE Transactions on Communications (Web)　E104.B　(10)　2021

    ISSN： 1745-1345

  32. Frequency Spectrum and Node-Position Sending Technologies for Wireless IoT.

    芝隆司, 古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　120　(341(SR2020 47-59))　2021

    ISSN： 2432-6380

  33. Measurement of radio channel impulse response using USRP X300 software defined radio considering non-causal components

    Tomoya Nakahama, Yoji Yamada, Suguru Kameda, Mizuki Motoyoshi, Noriharu Suematsu

    IEICE Technical Report SR2020-1　120　(53)　1-8　2020/06/04

    ISSN： 2432-6380

  34. A Filter Design Method of Direct RF Undersampling On-Board Receiver for Ka-Band HTS

    FURUICHI Tomoyuki, GUI Yang, MOTOYOSHI Mizuki, KAMEDA Suguru, SHIBA Takashi, SUEMATSU Noriharu

    IEICE Transactions on Communications (Web)　E103.B　(10)　2020

    ISSN： 1745-1345

  35. A Proposal of Broad Band Spectrum Estimation Method from Several Clock Undersampling Information by Compressed Sensing Algorithm.

    芝隆司, 古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　119　(376(IT2019 36-89))　2020

    ISSN： 0913-5685

  36. Proposal of 5GHz Simplified Beam Forming Wireless IoT Communication using Wi-Fi Backscatter

    末松憲治, 枝松航輝, 町井大輝, 本良瑞樹, 亀田卓

    電子情報通信学会技術研究報告　119　(459(MW2019 140-161))　2020

    ISSN： 0913-5685

  37. Link Design of Wi-Fi Backscatter Communication in 5-GHz Band

    枝松航輝, 町井大輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  38. Proposal of Beyond-Nyquist-Band of Water Vapor Radiometer using RF Under Sampling

    LYU Xing, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  39. In-body/Out-body Dual-Use 920MHz/5.02GHz Dual-Band RFID System

    DANG Bowen, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  40. Spectrum Estimation Method from Parallely Sampled Several Clock Undersampling Information by Compressed Sensing Algorithm

    芝隆司, 古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  41. 60 GHz 180 μW CMOS ASK Transmitter Using Combined On-Chip Resonator and Antenna

    本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  42. Proposal of 5GHz Simplified Beam Forming Wireless IoT Communication using Wi-Fi Backscatter

    末松憲治, 枝松航輝, 町井大輝, 本良瑞樹, 亀田卓

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  43. Measurement of Received Power of 5-GHz Band Wi-Fi Backscatter Communication Using a Miniaturized Antenna Module

    町井大輝, 枝松航輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  44. Complexity Reduction of Bandpass Delta-Sigma Modulator

    前畠貴, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  45. Image Signal Output Characteristics of Optical Fiber Feed Direct Digital RF Transmitter Using SFP + Optical Module

    田村涼, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  46. Link Design and Received Power Measurement of 5-GHz Band Wi-Fi Backscatter System Using a Miniaturized Antenna Module

    町井大輝, 枝松航輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　120　(90(SR2020 9-21))　2020

    ISSN： 2432-6380

  47. Demodulation of Regenerated Spectrum from Parallely Sampled Several Clock Undersampling Information by Compressed Sensing Algorithm

    芝隆司, 古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  48. Experimental Results of Digital Beamforming by Optical Feed Digital RF Transmitter Using SFP+ Optical Module

    田村涼, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  49. Experiment of 5-GHz Band Wi-Fi Backscatter System for Multiple Sensor Nodes Identification

    枝松航輝, 町井大輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  50. Link Design and Received Power Measurement of 5-GHz Band Wi-Fi Backscatter System Using a Miniaturized Antenna Module

    町井大輝, 枝松航輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2020　2020

    ISSN： 1349-144X

  51. Gain Improvement of a 130 GHz CMOS Amplifier by Using Radial Stub as AC Ground

    町井大輝, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　120　(240(MW2020 65-70))　2020

    ISSN： 2432-6380

  52. 920MHz/5.02GHz Bands Wireless Tag for In-Body/Out-Body Dual-Use RFID System

    DANG Bowen, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　120　(240(MW2020 65-70))　2020

    ISSN： 2432-6380

  53. Massive Connect IoTを志向したミリ波帯WBAN

    亀田卓, 秋元浩平, 横内汰地, 本良瑞樹, 末松憲治

    電子情報通信学会技術研究報告　119　(363(SRW2019 51-57)(Web))　2020

    ISSN： 0913-5685

  54. Throughput Evaluation of Dual-CTS Method for Spatial Reuse in Heterogeneous Wireless IoT Systems

    小野謙人, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告(Web)　120　(10(RCS2020 1-9))　2020

    ISSN： 2432-6380

  55. Millimeter-Wave Wireless Body Area Network Adaptable to Overcrowded Environments

    亀田卓, 秋元浩平, 横内汰地, 本良瑞樹, 末松憲治

    電子情報通信学会技術研究報告(Web)　120　(204(RCS2020 92-109))　2020

    ISSN： 2432-6380

  56. Electromagnetic Shielding of Conductive Polymer Combined Fabrics

    枝松航輝, 本良瑞樹, 末松憲治, 三浦健, 鳥光慶一

    電子情報通信学会技術研究報告　118　(506(MW2018 156-182))　2019

    ISSN： 0913-5685

  57. Analysis and measurement of Metamaterial Reflect Array using Diode for environment improvement of IoT radio wave

    尾関剛成, 山本愛理, 大澤拓門, 丸山珠美, 末松憲治, 佐藤弘康, 本良瑞樹, 大宮学

    電子情報通信学会技術研究報告　118　(484(WPT2018 64-96)(Web))　2019

    ISSN： 0913-5685

  58. Direct RF Undersampling Receiver for Wireless IoT Real-time Spectrum Monitor using High-speed Clock Switching

    古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(475(SR2018 121-140)(Web))　2019

    ISSN： 0913-5685

  59. Design of UHF RFID Tag Antenna for Implanted Denture

    XU Junyi, 佐藤弘康, 本良瑞樹, 末松憲治, 安井一仁, CHEN Qiang

    電子情報通信学会技術研究報告　119　(120(AP2019 21-46)(Web))　2019

    ISSN： 0913-5685

  60. A Study on Self-Interference Suppression in Digital RF Front End

    前畠貴, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　119　(109(SR2019 20-63)(Web))　2019

    ISSN： 0913-5685

  61. Electromagnetic Shielding of Conductive Polymer Combined Fabrics in Microwave Band and Millimeter-wave Band

    枝松航輝, 本良瑞樹, 末松憲治, 三浦健, 鳥光慶一

    電子情報通信学会技術研究報告　119　(346(MW2019 118-126))　2019

    ISSN： 0913-5685

  62. ダイレクトディジタルRF技術

    末松憲治, 本良瑞樹, 亀田卓

    電子情報通信学会論文誌 C(Web)　J102-C　(11)　2019

    ISSN： 1881-0217

  63. 導電性高分子含有布のマイクロ波帯における遮蔽特性

    枝松航輝, 本良瑞樹, 末松憲治, 末松憲治, 三浦健, 鳥光慶一, 鳥光慶一

    電子情報通信学会大会講演論文集(CD-ROM)　2019　2019

    ISSN： 1349-144X

  64. ディジタルRF送信機に向けたIIR Filterの並列化

    前畠貴, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2019　2019

    ISSN： 1349-144X

  65. 26GHz帯ダイレクトディジタルRF変調器用イメージエンハンスメント型1ビットDAC

    ZHANG Junhao, 数野将史, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2019　2019

    ISSN： 1349-144X

  66. 導電性高分子含有布の遮蔽特性の広帯域測定

    枝松航輝, 本良瑞樹, 末松憲治, 末松憲治, 三浦健, 鳥光慶一, 鳥光慶一

    電子情報通信学会大会講演論文集(CD-ROM)　2019　2019

    ISSN： 1349-144X

  67. 市販ADCボードを用いた無線IoTリアルタイムスペクトラムモニタのアンダーサンプリング受信特性

    古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2019　2019

    ISSN： 1349-144X

  68. QZSS Short Message SS-CDMA Communication System-Evaluation of Transmitting Timing Control Error-

    小熊博, 河合怜, 島田拓海, 浅井剛, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　119　(62(SR2019 1-19)(Web))　2019

    ISSN： 0913-5685

  69. 人体の減衰を考慮した複数ユーザ環境における60GHz帯WBAN間干渉環境のシミュレーション評価

    秋元浩平, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会論文誌 B(Web)　J102-B　(2)　2019

    ISSN： 1881-0209

  70. Reliable Millimeter-Wave WBAN

    秋元浩平, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(475(SR2018 121-140)(Web))　2019

    ISSN： 0913-5685

  71. Dual-CTS: Spatial Reuse Method for Heterogeneous Wireless System

    小野謙人, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　119　(183(CQ2019 57-87)(Web))　2019

    ISSN： 0913-5685

  72. Reliable Millimeter-Wave WBAN: Evaluation of Number of Interfering Users in User-Dense Condition

    亀田卓, 秋元浩平, 横内汰地, 本良瑞樹, 末松憲治

    電子情報通信学会技術研究報告　119　(183(CQ2019 57-87)(Web))　2019

    ISSN： 0913-5685

  73. Millimeter-Wave WBAN for Overcrowded Environment: Evaluation of Throughput with Consideration of the Human Body Direction

    横内汰地, 秋元浩平, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　119　(262(SR2019 64-85)(Web))　2019

    ISSN： 0913-5685

  74. Evaluation of Dual-CTS Method for Spartial Reuse in Heterogeneous Wireless IoT System

    小野謙人, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　119　(262(SR2019 64-85)(Web))　2019

    ISSN： 0913-5685

  75. 920MHz帯/2.4GHz帯/5GHz帯マルチバンドリアルタイムスペクトラムモニタの基本特性

    古市朋之, 秋元浩平, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2019　2019

    ISSN： 1349-144X

  76. 鉄道車両内におけるミリ波帯WBANの通信路容量の評価

    横内汰地, 秋元浩平, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2019　2019

    ISSN： 1349-144X

  77. 異種無線システム共存のための空間再利用手法Dual-CTSの提案

    小野謙人, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2019　2019

    ISSN： 1349-144X

  78. Evaluation of Channel Capacity of Millimeter-Wave WBAN in User-Dense Condition

    118　(218)　23-28　2018/09/20

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  79. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Evaluation of Transmission Time Delay Reduction by Multiple-Users Traffic Relay

    117　(456)　235-240　2018/02/28

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  80. Evaluation of Channel Capacity for Downlink Non-Orthogonal Multiple Access (NOMA) with Imperfect SIC

    117　(410)　91-96　2018/01/25

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  81. Measurement Evaluation of Human Body Blocking for Inter-Network Interference of 60-GHz-Band WBAN

    117　(382)　31-36　2018/01/18

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  82. A Study on Low Power Consumption Oscillator

    本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　117　(412(ED2017 93-103))　2018

    ISSN： 0913-5685

  83. 28GHz帯RFアンダーサンプリング受信機におけるクロックジッタの受信特性に与える影響

    吉野長浩, 則島景太, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  84. 無線IoTリアルタイム周波数センサ用ダイレクトRFアンダーサンプリング受信機のクロック周波数の検討

    古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  85. ダイレクトディジタルRF技術-ナイキスト周波数を超える挑戦-

    末松憲治, 本良瑞樹, 亀田卓

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  86. 1ビットバンドパスデルタシグマ変調器の開発

    前畠貴, 前畠貴, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  87. 28 GHz band direct RF undersampling broadband receiver for next generation HTS satellite communication

    GUI Yang, 則島景太, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　117　(462(MW2017 173-196))　2018

    ISSN： 0913-5685

  88. Clock Jitter Dependence on Reception Characteristic of a 28GHz-band Direct RF Undersampling Receiver

    吉野長浩, 則島景太, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(104(MW2018 18-21))　2018

    ISSN： 0913-5685

  89. Feasibility Study of Partial Denture Search System Using Different Carrier Frequency Inside and Outside the Human Body

    本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(57(SR2018 1-20)(Web))　2018

    ISSN： 0913-5685

  90. 60GHz帯ダイレクトRFアンダーサンプリング受信用45nm SOI CMOS S/H IC

    LYU Xing, 吉野長浩, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  91. タイムインターリーブ方式ADCにおけるタイミングスキュースプリアスを考慮したダイレクトRFアンダーサンプリング受信機構成の検討

    古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  92. A Study on In-/Out-body Communication System

    本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(248(MW2018 70-91))　2018

    ISSN： 0913-5685

  93. A Multi-Band Real-Time Spectrum Monitoring Receiver for 900MHz-6GHz Wireless IoT

    末松憲治, 本良瑞樹, 古市朋之, 亀田卓

    電子情報通信学会技術研究報告　118　(282(ASN2018 52-77)(Web))　2018

    ISSN： 0913-5685

  94. Transmitting Timing Calculation Unit with CPU on FPGA for QZSS Short Message SS-CDMA Communication

    小熊博, 河合怜, 浅井剛, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(274(SR2018 58-96)(Web))　2018

    ISSN： 0913-5685

  95. 下り回線非直交多元接続(NOMA)における不完全SIC時の通信路容量:多値変調方式の評価

    真山健大, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  96. 混雑環境における人体ブロッキングを考慮したミリ波帯WBAN間干渉環境の検討

    秋元浩平, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  97. 下り回線非直交多元接続(NOMA)における送信EVMを考慮したビット誤り率特性の評価

    真山健大, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  98. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System: Evaluation of Large-Size Data Transmission Delay Time of Traffic Relay

    小野謙人, 小野貴博, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(126(SR2018 21-57)(Web))　2018

    ISSN： 0913-5685

  99. Evaluation of Reception Performance Considering Error Vector Magnitude for Downlink Non-Orthogonal Multiple Access

    真山健大, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(125(RCS2018 80-130)(Web))　2018

    ISSN： 0913-5685

  100. 位置情報を用いた異種無線融合システムのネットワーク選択手法:大容量データ伝送におけるトラヒックリレーの伝送遅延時間の評価

    小野謙人, 小野貴博, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2018　2018

    ISSN： 1349-144X

  101. Uplink Non-Orthogonal Multiple Access with Single-Carrier Frequency Domain Equalization

    真山健大, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(274(SR2018 58-96)(Web))　2018

    ISSN： 0913-5685

  102. A Study on Single-Carrier Frequency Domain Pre-Equalization for Uplink Non-Orthogonal Multiple Accesss

    真山健大, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　118　(372(RCS2018 216-241)(Web))　2018

    ISSN： 0913-5685

  103. Distortion Compensation Method with Asymmetric Waveform Consideration in Concurrent Dual-band 1-bit Bandpass Delta-Sigma Modulator

    117　(133)　15-21　2017/07/19

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  104. Poster Presentation : Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Generation Method of Map Information Using Spatial Interpolation

    117　(130)　105-112　2017/07/19

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  105. Technology Exhibit : Experimental Evaluation for QZSS Short Message SS-CDMA Communication : Construction of Transmission Timing Control System with FPGA

    117　(56)　89-95　2017/05/25

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  106. Expansion to Wide Area Network of SDN

    117　(11)　71-75　2017/04/24

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  107. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : A Study of QoE for Traffic Navigation

    117　(11)　101-106　2017/04/24

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  108. Invited Lecture : An Adaptive Phased Array Control Method Using Low-Frequency Part of Signal

    116　(487)　79-83　2017/03/02

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  109. Experimental Evaluation of Transmission Timing Control for QZSS Short Message Synchronized SS-CDMA Communication

    116　(480)　89-94　2017/03/01

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  110. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Proposal of Traffic Relay

    116　(480)　15-20　2017/03/01

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  111. A Study on Synchronization of LNA Power with Sampling Clock in Ku-Band Direct RF Undersampling Receiver.

    大和田健夫, 小泉友和, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　116　(487(ICD2016 118-144))　2017

    ISSN： 0913-5685

  112. フルロード状態トランスポンダにおける高C/Nチャネル確保のためのチャネル割り当て手法の一検討

    舟山拓実, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  113. ダイレクトRFアンダーサンプリング受信用CW-CLK変換回路内蔵28GHz S/H CMOS IC

    GUI Yang, 則島景太, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  114. 部分義歯用アンテナの動作周波数に関する検討

    武田尚之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  115. 18.6GHzのロックレンジを持つ60GHz帯バラクタチューン注入同期型CMOS周波数分周器

    数野将史, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  116. In-Body/Out-Body Millimeter-Wave Antenna with Vertical Lecher Line

    武田尚之, 斉藤琢斗, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　117　(104(MW2017 21-30))　2017

    ISSN： 0913-5685

  117. 57GHz130μW低消費電力ミリ波CMOS発振器

    本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  118. ダイレクトRFアンダーサンプリング受信機を用いた広帯域リアルタイム型周波数モニタリングの提案

    末松憲治, 本良瑞樹, 古市朋之, 亀田卓

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  119. 広帯域ダイレクトRFアンダーサンプリング周波数センサにおける受信周波数特定のためのクロック周波数切り替え条件の検討

    古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  120. 28GHz帯ダイレクトRFアンダーサンプリング受信用サンプルホールドCMOS IC

    吉野長浩, 則島景太, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  121. 高次ナイキストゾーンにおける1ビットローパスΔΣ変調RZ-DAC変調出力のSNR

    数野将史, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  122. A Sample and Hold CMOS IC for 28 GHz-Band Direct RF Under Sampling Reception

    吉野長浩, 則島景太, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　117　(216(MW2017 68-81))　2017

    ISSN： 0913-5685

  123. A Study on the SNR in Higher Nyquist Zone of 1-Bit Band-Pass Delta-Sigma Modulator using Manchester Coding

    数野将史, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　117　(216(MW2017 68-81))　2017

    ISSN： 0913-5685

  124. A study on Frequency Identification of Received RF Signal in Wideband Direct RF Undersampling Frequency Sensor

    古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　117　(366(MW2017 142-161))　2017

    ISSN： 0913-5685

  125. ミリ波帯WBANのための簡易伝搬モデルを用いたユーザ間干渉量の評価

    秋元浩平, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  126. Faster-than-Nyquistを適用した多値変調方式の周波数利用効率の一検討

    小野貴博, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  127. 位置情報を用いた異種無線融合システムのスループット改善手法:トラヒックリレーの提案と特性評価

    小野貴博, LIU Q., 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  128. 人体ブロッキングによる減衰量の測定に基づくミリ波帯WBAN間干渉の検討

    秋元浩平, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2017　2017

    ISSN： 1349-144X

  129. Technology Exhibit : Measurement of 3.5GHz Band Small Cell Indoor-Outdoor Propagation : Visual Exploration of Propagation Model in Wooden Residential Area

    116　(276)　17-20　2016/10/27

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  130. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Evaluation of Traffic Navigation

    116　(276)　121-126　2016/10/27

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  131. A 2GHz Band Ultra Small Balun Composed of N Coupled Transmission Lines Using CMOS Process

    116　(254)　63-68　2016/10/20

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  132. A 2GHz Band Ultra Small Balun Composed of N Coupled Transmission Lines Using CMOS Process

    116　(255)　63-68　2016/10/20

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  133. Special Section on Microwave and Millimeter-Wave Technology FOREWORD

    Noriharu Suematsu

    IEICE TRANSACTIONS ON ELECTRONICS　E99C　(10)　1084-1084　2016/10

    ISSN： 1745-1353

  134. Solution of Hidden Terminal Problem in WLAN by Location-Based Virtual Sector Method : Evaluation of Sector Re-division Scheme in Shadowing Environment

    116　(184)　95-100　2016/08/18

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  135. Application Examination of OpenFlow Network for Satellite Communication

    116　(92)　7-10　2016/06/14

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  136. C-2-55 A 2GHz Band Ultra Small Balun With Second Harmonic Branching Filter Using CMOS Process

    Terajima Kazuma, Fujii Kenichi, Takagi Tadashi, Tsubouchi Kazuo, Kameda Suguru, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2016　(1)　84-84　2016/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  137. B-3-15 QZSS SS-CDMA Short Message Communication : Evaluation of Access Control Scheme with Consideration of Fairness

    Ohya K., Takahashi T., Kameda S., Oguma H., Taira A., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2016　(1)　302-302　2016/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  138. B-3-19 Evaluation of OpenWrt Switch for Satellite Communication

    Yoshino Nagahiro, Oguma Hiroshi, Kameda Suguru, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2016　(1)　306-306　2016/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  139. B-17-44 Suppression Technology of Asymmetric Component in 1-bit Band-Pass Delta Sigma Modulator for Concurrent Dual-Band Transmitter

    Maehata Takashi, Kameda Suguru, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2016　(1)　647-647　2016/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  140. B-5-88 Experimental Evaluation of Indoor-Outdoor Propagation Environment in 3.5 GHz-Band Small Cell : Evaluation of Received Signal Power Based on Transmitter Environment

    Fukudome H., Akimoto K., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2016　(1)　481-481　2016/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  141. B-17-33 Location-Based Virtual Sector Method for Hidden Terminal Problem in WLAN

    Akimoto K., Kameda S., Taira A., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2016　(1)　636-636　2016/03/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  142. Ku帯ダイレクトRFイメージ除去アンダーサンプリングCMOS受信RFIC

    則島景太, 小泉友和, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2016　2016

    ISSN： 1349-144X

  143. 60GHz帯3次元ビームフォーミング用単素子パッチアンテナの検討

    YE W., 吉田賢史, 本良瑞樹, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集(CD-ROM)　2016　2016

    ISSN： 1349-144X

  144. Direct RF Undersampling Receiver for High-SHF Band Digital Beam Forming System

    末松憲治, 亀田卓, 本良瑞樹

    電子情報通信学会技術研究報告　115　(476(MW2015 173-214))　2016

    ISSN： 0913-5685

  145. A Study on Frequency Response for In-body Network

    本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　115　(476(MW2015 173-214))　2016

    ISSN： 0913-5685

  146. Research and Development of Digital Radio Frequency Technology

    前畠貴, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　116　(276(SR2016 55-77))　2016

    ISSN： 0913-5685

  147. A Study of Operational Frequencies of the Millimeter-Wave Antenna for In-Body/Out-Body Communication

    斉藤琢斗, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　116　(253(EMCJ2016 60-83))　2016

    ISSN： 0913-5685

  148. ゲートバイアス制御型サブナノ秒電源スイッチングKu帯CMOS LNA

    小泉友和, 大和田健夫, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2016　2016

    ISSN： 1349-144X

  149. Ku帯イメージリジェクション型ダイレクトRFアンダーサンプリングCMOS受信機

    則島景太, 小泉友和, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会技術研究報告　116　(253(EMCJ2016 60-83))　2016

    ISSN： 0913-5685

  150. バラクタダイオードを用いた50GHz帯広帯域注入同期型周波数分周器

    数野将史, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2016　2016

    ISSN： 1349-144X

  151. 20GHz帯ダイレクトRFアンダーサンプリング受信機の復調特性

    則島景太, 小泉友和, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会大会講演論文集(CD-ROM)　2016　2016

    ISSN： 1349-144X

  152. Experimental Evaluation of Coverage in 3.5GHz-Band Small Cell Indoor-Outdoor Propagation Environment

    福留秀基, 秋元浩平, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会技術研究報告　115　(411(SR2015 72-88))　2016

    ISSN： 0913-5685

  153. WLANマルチセル環境における仮想セクタ方式によるさらされ端末問題の低減

    秋元浩平, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集(CD-ROM)　2016　2016

    ISSN： 1349-144X

  154. C-2-7 A 60 GHz-Band CMOS Transistor-Pair Type Even Harmonic Mixer Utilizing Marchand-Balun

    Inagaki Ryuji, Tsuru Masaomi, Taniguchi Eiji, Fukumoto Hiroshi, Kameda Suguru, Suematsu Noriharu, Takagi Tadashi, Tsubouchi Kazuo

    Proceedings of the Society Conference of IEICE　2015　(1)　27-27　2015/08/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

  155. B-3-5 Evaluation of Dependable Network with OpenFlow on the Satellite Channel

    Yoshino Nagahiro, Oguma Hiroshi, Kameda Suguru, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2015　(1)　190-190　2015/08/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

  156. B-17-15 Evaluation of Positioning Accuracy on Various Smartphones with Multi-GNSS Receiver

    Ozeki H., Oguma H., Koizumi A., Kameda S., Suematsu N.

    Proceedings of the Society Conference of IEICE　2015　(1)　407-407　2015/08/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

  157. B-17-17 Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : System Throughput Evaluation of Route Estimation Scheduling Method with Different Number of Users

    Liu Q., Kuboniwa J., Kameda S., Taira A., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2015　(1)　409-409　2015/08/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

  158. B-17-16 Evaluation of Interference Control Scheme Using Location Information in WLAN Multicell Environment

    Akimoto K., Kameda S., Taira A., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2015　(1)　408-408　2015/08/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

  159. Dependable wireless network against big disasters

    Akinori Taira, Noriharu Suematsu, Suguru Kameda, Kazuo Tsubouchi, Tadashi Takagi

    Journal of the Institute of Electronics, Information and Communication Engineers　98　(8)　745-752　2015/08

    ISSN： 0913-5693

  160. 災害に強い「頼りになる」無線通信ネットワーク

    平明徳, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会誌　vol.98　(No.8)　745-752　2015/08/01

  161. Compensation for Nonlinear Intersymbol Interference of 1-bit Bandpass Delta-Sigma Modulation

    115　(161)　7-11　2015/07/29

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  162. ディペンダブルエア − 異種無線融合ネットワークにおける高精度位置情報を用いたネットワーク選択手法とトラヒックナビゲーション−

    坪内 和夫, 亀田 卓, 平 明徳, 末松 憲治, 高木 直

    電子情報通信学会 基礎・境界ソサイエティ Fundamentals Review　Vol. 9(2015)　(No. 1)　37-46　2015/07/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    DOI： 10.1587/essfr.9.37 　

    ISSN： 1882-0875

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    We have proposed the concept of "Dependable Air", which is a heterogeneous and highly reliable wireless network. Dependable Air can function even in the event of a major disaster. To expand the capacity of Dependable Air, small cell networks such as millimeter-wave bands are necessary. However, since small cell networks have a coverage of only several meters, their resources are used by only a small part of the traffic. In this paper, traffic navigation using map information is explained for the efficient use of small cell networks. By using the scheme, each user terminal schedules the timing of data packet transmission on the basis of the expected user's route. System-wide load balancing is realized by using traffic navigation.

  163. C-2-5 A Ka Band Self-Injection Locked VCO-IC with 3bit Phase Shifter

    Kawasaki Kengo, Tsuru Masaomi, Taniguchi Eiji, Fukumoto Hiroshi, Kameda Suguru, Suematsu Noriharu, Taira Akinori, Takagi Tadashi, Tsubouchi Kazuo

    Proceedings of the IEICE General Conference　2015　(1)　25-25　2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  164. C-2-88 A 5-GHz IF Band Receiver Module for Millimeter-Wave 5-bit BB Beam Forming

    Nakamura M., Ta T. T., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2015　(1)　108-108　2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  165. B-17-9 WLAN Control Scheme with RTS/CTS Reservation by Separate Channel in Congested Environment

    Huang M., Miyake Y., Kameda kameda, Taira A., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2015　(1)　556-556　2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  166. B-17-12 Suppression Technology of the Non-linear Component in 1-bit Bandpass ΔΣ Modulation

    Maehata Takashi, Kameda Suguru, SUEMATSU Noriharu

    Proceedings of the IEICE General Conference　2015　(1)　559-559　2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  167. BT-4-3 Field Trial of Satellite Communication Networks Valid for Disaster Recovery

    Kameda S., Oguma H., Sasanuma M., Eguchi S., Kuroda K., Suematsu N.

    Proceedings of the IEICE General Conference　2015　(1)　"SS-59"-"SS-62"　2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  168. BI-5-5 Traffic Navigation Using QZSS/GPS Positioning Information

    Kameda S., Kuboniwa J., Miyake Y., Taira A., Oguma H., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2015　(2)　"SS-88"-"SS-89"　2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  169. B-3-2 Experimental Evaluation of Timing Synchronization Accuracy for QZSS SS-CDMA Short Message Communication

    Miyake Y., Akimoto K., Kameda S., Taira A., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2015　(1)　254-254　2015/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

  170. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Sky View Factor and Mesh Generation Processing

    NORISHIMA Keita, SUEHIRO Konatsu, HOUDO Chisato, OGUMA Hiroshi, KUBONIWA Junpei, KAMEDA Suguru, TAIRA Akinori, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. SR, Smart radio　114　(435)　23-28　2015/01/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Heterogeneous wireless systems such as a combination of mobile broadband wireless access (MBWA) and wireless local area network (WLAN) are candidates to attain the large capacity in the next generation mobile communication systems. For capacity expansion, small cells of multiple wireless networks are deployed densely in these systems. Because many cells overlap, users must discover lots of cells at once for cell selection. As a result, radio resources are much used for cell selection and cell selection errors occur in dense small cell environment. We developed the prototype system channel quality map construction scheme using multi-global navigation satellite system (GNSS) signals for heterogeneous wireless network. Furthermore, we have clarified the dependence of positioning accuracy on the sky view factor.

  171. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Proposal of Traffic Navigation

    KUBONIWA Junpei, MIYAKE Yuji, KAMEDA Suguru, TAIRA Akinori, OGUMA Hiroshi, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. SR, Smart radio　114　(435)　29-34　2015/01/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Heterogeneous wireless systems such as a combination of mobile broadband wireless access (MBWA) and wireless local area network (WLAN) are candidates to attain the large capacity in next generation mobile communication systems. For capacity expansion, small cell networks using millimeter wave is necessary. However, small cell networks have only several meters coverage, thus their resources are used by only a small part of traffic. We have proposed the network selection scheme using the positioning information and a map information. Using the map information, users can get the all networks' expected throughput without cell discovery. In this paper, for efficient use of the small cell networks, traffic navigation with the map information is proposed. In the proposed scheme, each user terminal schedules the timing of the data packet transmission on the basis of the expected user's route. Using the traffic navigation, the system-wide load balancing is realized. The simulation results show that the proposed scheme can improve the total throughput in comparison with the conventional one.

  172. Experimental Evaluation of Synchronization Accuracy for QZSS SS-CDMA Short Message Communication

    AKIMOTO Kohei, MIYAKE Yuji, KAMEDA Suguru, TAIRA Akinori, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. SR, Smart radio　114　(435)　13-18　2015/01/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    For realizing a safety confirmation system for disaster utilizing Quasi-Zenith Satellite (QZS), we have proposed spread spectrum code division multiple access (SS-CDMA) system to achieve a direct communication from ground terminals to a satellite. This method realizes time and frequency synchronization between terminals using a satellite positioning signal to achieve a high density uplink code division multiple access (CDMA). In this paper, by using a commercially available Global Positioning System (GPS) synchronous oscillator, experimental verification of synchronization accuracy is shown. SS-CDMA communication system is necessary to verify the synchronization accuracy at different satellite constellation, since the simultaneous transmission from a terminal located in Japan is performed. In this validation, the number of visible satellites of a plurality of GPS synchronous oscillator is changed, to verify the synchronization error. As a result, it was shown to be a cumulative distribution function (CDF) 99% or more with respect to the relative error ± 20 ns that is the target value of SS-CDMA.

  173. Millimeter-wave Broadband Communication Beam Forming IF Receiver Controlled with Low Frequency Signal Component

    中村美琴, TUAN THANH Ta, 本良瑞樹, 亀田卓, 末松憲治, 平明徳, 高木直, 坪内和夫

    電子情報通信学会技術研究報告　114　(498(MW2014 202-227))　2015

    ISSN： 0913-5685

  174. Ku帯ダイレクトRFアンダーサンプリング受信用サンプル・ホールドCMOS IC

    小泉友和, 本良瑞樹, BANDA Daliso, 和田平, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集(CD-ROM)　2015　2015

    ISSN： 1349-144X

  175. A Ku-Band Series/Shunt Switching Type S/H IC for Direct RF Under Sampling Reception

    小泉友和, 本良瑞樹, BANDA Daliso, 和田平, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会技術研究報告　115　(141(EMT2015 8-48))　2015

    ISSN： 0913-5685

  176. ファイバ型異方性導電接着フィルムを用いたRFICフリップチップ実装の検討

    大和田健夫, 本良瑞樹, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集(CD-ROM)　2015　2015

    ISSN： 1349-144X

  177. Ka帯ダイレクトRFアンダーサンプリング受信用サンプル・ホールドCMOS IC

    則島景太, 小泉友和, 本良瑞樹, BANDA Daliso, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集(CD-ROM)　2015　2015

    ISSN： 1349-144X

  178. ミリ波RFICフリップチップ実装時のアンダーフィルの影響

    斉藤琢斗, 中山英太, 本良瑞樹, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集(CD-ROM)　2015　2015

    ISSN： 1349-144X

  179. A CMOS S/H IC for Ka-Band Direct RF Under Sampling Reception

    則島景太, 小泉友和, 本良瑞樹, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会技術研究報告　115　(314(MW2015 120-132))　2015

    ISSN： 0913-5685

  180. An Interference Control Scheme Using Location Information in WLAN Multicell Environment

    秋元浩平, 亀田卓, 平明徳, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会技術研究報告　115　(2(RCS2015 1-22))　2015

    ISSN： 0913-5685

  181. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Throughput Evaluation Considering the Number of Active Users

    KUBONIWA Junpei, MIYAKE Yuji, KAMEDA Suguru, TAIRA Akinori, OGUMA Hiroshi, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. RCS　114　(372)　55-60　2014/12/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    Heterogeneous wireless systems such as a combination of mobile broadband wireless access (MBWA) and wireless local area network (WLAN) are candidates to attain the large capacity in next generation mobile communication systems. For capacity expansion, small cells of multiple wireless network are deployed densely. Since a number of the cells overlap, users must discover a lot of cells for cell selection. We have proposed the efficient network selection scheme using the positioning information and a channel quality map. Using this map, users can select the suitable cell without cell discovery. In this paper, considering the traffic load, network selection based on the throughput is presented. Users can avoid the congested network and select one which has a low traffic demand. The simulation results show that the proposed scheme can improve the average user throughput in comparison with the conventional one.

  182. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Throughput Evaluation Considering Selection Resource Utilization (Smart Radio)

    KUBONIWA Junpei, MIYAKE Yuji, KAMEDA Suguru, TAIRA Akinori, OGUMA Hiroshi, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. SR, Smart radio　114　(284)　151-156　2014/10/30

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    For the next generation mobile communication, heterogeneous wireless system has been discussed to attain high throughput and wide coverage. Furthermore, small cells are deployed densely for capacity expansion. Because a number of the cells overlap, users must discover a lot of networks at once for network selection. We have proposed the high efficient network selection scheme for data traffic optimization in such an environment. The proposed scheme uses positioning information and the channel quality map for network selection. Using a channel quality map, users can select the network which has a better channel quality without cell discovery. In this paper, we evaluate the system performance enhancement by reduced radio resource utilization for network selection. The simulation results show that the proposed scheme can improve the system throughput in comparison with the conventional scheme which is required to discover cells and measure signal strength by user oneself.

  183. Multi-Mode Portable SDR VSAT for Disaster-Resilient Wireless Networks(Poster session)

    KAMEDA Suguru, OGUMA Hiroshi, SASANUMA Mitsuru, EGUCHI Shigeru, KURODA Komei, SUEMATSU Noriharu

    IEICE technical report. SR, Smart radio　114　(284)　51-52　2014/10/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    More details Close

    As a result of the great east Japan earthquake in March 2011, the importance of secure satellite communication such as very small aperture terminal (VSAT) systems has been recognized. In this work, satellite-terrestrial multi-mode VSAT has been developed by using software defined radio (SDR) technology in order to satisfy the various demands for urgent life line recovery. In the event of disaster, evacuated people can use the developed multi-mode VSAT from their personal terminals, e.g., smart phones, via Wi-Fi for website access and internet protocol (IP) phone.

  184. B-17-18 Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Implementation of Channel Quality Map Construction Scheme

    Oguma H., Norishima K., Koizumi A., Kuboniwa J., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi T.

    Proceedings of the Society Conference of IEICE　2014　(1)　408-408　2014/09/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

  185. B-17-17 Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Throughput Evaluation with Handover Offset

    Kuboniwa J., Miyake Y., Kameda S., Taira A., Oguma H., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2014　(1)　407-407　2014/09/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

  186. BS-2-4 Network Selection Scheme Using QZSS/GPS Positioning Information for Heterogeneous Wireless System

    Kameda S., Kuboniwa J., Miyake Y., Taira A., Oguma H., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2014　(1)　"S-24"-"S-25"　2014/09/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

  187. B-3-2 Evaluation of Evacuee Information Management System on Next Generation VSAT

    Matsuura Souta, Koizumi Atsushi, Oguma Hiroshi, Kameda Suguru, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2014　(1)　206-206　2014/09/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

  188. BT-3-4 Digital RF Technologies for Multi-Band Multi-Mode Transceivers

    Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2014　(1)　"SS-29"-"SS-31"　2014/09/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

  189. B-1-112 Design of a 60GHz Band 3-D Phased Array Antenna Module for Hetero-Plane Beam Synthesis

    Ye W., Suzuki Y., Yoshida S., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2014　(1)　112-112　2014/09/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

  190. C-2-71 Operation Verification of Self-Directed Beam Forming System with Low Loop Controlfor Millimeter-Wave Array Antenna

    Nakamura M., T.T Ta, Kameda S, Suematsu N, Taira A, Takagi T, Tsubouchi K

    Proceedings of the Society Conference of IEICE　2014　(1)　94-94　2014/09/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

  191. B-5-85 A Proposal of Terrestrial Wide Area Information Gathering Network using QZSS Positioning Signals

    Taira Akinori, Miyake Yuji, Kameda Suguru, Suematsu Noriharu, Takagi Tadashi, Tsubouchi Kazuo

    Proceedings of the Society Conference of IEICE　2014　(1)　356-356　2014/09/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

  192. B-5-101 A Evaluation of Transmission Delay in WLAN with Separated Channel in Environment with High User Density

    Huang M., Miyake Y., Kameda S., Taira A., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2014　(1)　372-372　2014/09/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

  193. Invited Talk : Satellite Communication Networks Valid for Disaster Recovery : Development and Field Trial of Multi-Mode SDR VSAT

    KAMEDA Suguru, OGUMA Hiroshi, SASANUMA Mitsuru, EGUCHI Shigeru, KURODA Komei, SUEMATSU Noriharu

    Technical report of IEICE. RCS　114　(180)　43-48　2014/08/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    As a result of the great east Japan earthquake in March 2011, the importance of secure satellite communication such as very small aperture terminal (VSAT) systems has been recognized. In this work, satellite-terrestrial multi-mode VSAT has been developed by using software defined radio (SDR) technology in order to satisfy the various demands for urgent life line recovery. In the event of disaster, evacuated people can use the developed multi-mode VSAT from their personal terminals, e.g., smart phones, via Wi-Fi for website access and internet protocol (IP) phone.

  194. Digitally Enhanced Harmonic Transmitter of 1-bit Bandpass ΔΣ Modulator

    MAEHATA Takashi, KAMEDA Suguru, SUEMATSU Noriharu

    Technical report of IEICE. SAT　114　(179)　11-14　2014/08/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A 1-bit digital radio frequency transmitter (1-bit DRF) using a band-pass delta sigma modulator can directly output a modulated RF signal without a digital to analog converter, a mixer and a local. This signal consists of a 1-bit digital train with a rectangular waveform in time domain and also includes the RF signal in frequency domain. It can be reconstructed as an RF signal by a band-pass filter (BPF), whose carrier frequency is continuously tunable. However, most of all, this frequency is less than a data rate because the signal strength decreases according to an increase in the carrier frequency. We therefore have to use a higher data rate or a frequency converter if we need to transmit a higher frequency over a data rate. In this paper, we propose a digitally enhanced harmonic transmitter of 1-bit DRF. This transmitter emphasizes high order harmonic frequency components in the rectangular waveform by shortening the duration time of each 1 bit. We have shown a block diagram of the transmitter and estimated its performance by simulation.

  195. Invited Talk : Satellite Communication Networks Valid for Disaster Recovery : Development and Field Trial of Multi-Mode SDR VSAT

    KAMEDA Suguru, OGUMA Hiroshi, SASANUMA Mitsuru, EGUCHI Shigeru, KURODA Komei, SUEMATSU Noriharu

    Technical report of IEICE. SAT　114　(179)　51-56　2014/08/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    As a result of the great east Japan earthquake in March 2011, the importance of secure satellite communication such as very small aperture terminal (VSAT) systems has been recognized. In this work, satellite-terrestrial multi-mode VSAT has been developed by using software defined radio (SDR) technology in order to satisfy the various demands for urgent life line recovery. In the event of disaster, evacuated people can use the developed multi-mode VSAT from their personal terminals, e.g., smart phones, via Wi-Fi for website access and internet protocol (IP) phone.

  196. Invited Lecture : SS-CDMA for Location and Short Message Communication using QZSS

    TAIRA Akinori, MIYAKE Yuji, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　114　(163)　131-138　2014/07/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    When the Quasi-Zenith Satellite System positioning service is applied to the synchronization in wireless communication, many terminals located in wide area can be synchronized each other in time and frequency domain. It can provide high efficient wireless communication while maintaining simple control scheme which is one of the advantages of Wireless Distributed Network (WDN). Because the location and short message communication system must accommodate a number of terminals using satellite communication with large round trip time, it is difficult to employ the precise and complex control scheme. Collision capable simple scheme like ALOHA would be suitable. So this system is regarded as one of the application of WDN. SS-CDMA realizes the direct access from terminals to the satellite and many users simultaneous transmission using large spreading factor SS-codes. In this paper, physical layer transmission performance and access control scheme are shown. 1/8 normalized frequency offset in symbol rate and 1/8 chip timing jitter can achieve good performance near the 100% accommodation rate.

  197. Invited Lecture : SS-CDMA for Location and Short Message Communication using QZSS

    TAIRA Akinori, MIYAKE Yuji, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. RCS　114　(164)　185-192　2014/07/30

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    When the Quasi-Zenith Satellite System positioning service is applied to the synchronization in wireless communication, many terminals located in wide area can be synchronized each other in time and frequency domain. It can provide high efficient wireless communication while maintaining simple control scheme which is one of the advantages of Wireless Distributed Network (WDN). Because the location and short message communication system must accommodate a number of terminals using satellite communication with large round trip time, it is difficult to employ the precise and complex control scheme. Collision capable simple scheme like ALOHA would be suitable. So this system is regarded as one of the application of WDN. SS-CDMA realizes the direct access from terminals to the satellite and many users simultaneous transmission using large spreading factor SS-codes. In this paper, physical layer transmission performance and access control scheme are shown. 1/8 normalized frequency offset in symbol rate and 1/8 chip timing jitter can achieve good performance near the 100% accommodation rate.

  198. Self-Directed Beam Forming System with Low Loop Control for Broadband Communication Array Antenna

    NAKAMURA Mikoto, Thanh Ta Tuan, KAMEDA Suguru, SUEMATSU Noriharu, TAIRA Akinori, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. OPE　114　(142)　203-208　2014/07/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Self-directed beam forming system is to calculate phase difference from signals received at each element of the array antennas with digital signal processing and estimate the direction of arrival of the signal, and form a main beam to the direction. If we consider applying this method to broadband communication, the receiver is required to process broadband signals as many as antenna elements, thus, the method is difficult to realize. In this paper, we propose self-directed beam forming system with low loop control. In this method, we calculate phase difference from only low frequency component of the received signal and control beam forming. If we use the proposed method, self-directed beam forming system can be realized with reasonable performance ADCs (Analog-to-Digital Converter) and the DSP (Digital Signal Processor) in broadband communication. When the number of the antenna elements is n and bandwidth of low frequency component is 1/m of the received signal bandwidth, power consumption of the ADCs can be decreased to 1/n and the processing speed of the DSP can be decreased to 1/m. The proposed method is verified that the received signals can be phase shifted and added correctly by simulation.

  199. Capacity Evaluation of Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System

    KUBONIWA Junpei, MIYAKE Yuji, KAMEDA Suguru, TAIRA Akinori, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. RCS　114　(86)　25-30　2014/06/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    For the next generation mobile communication, heterogeneous wireless system has been discussed to attain high throughput and wide coverage. Since multiple network cells overlap in the heterogeneous wireless system, the number of networks which users must discover increases compared to homogeneous wireless system. In the future, a large number of small cells will be deployed for traffic offload. Because users must discover a lot of networks increasingly, radio resources are more used for network discovery and frequent selection error of networks occurs. We have proposed the network selection scheme using high-accuracy positioning information. And it has been shown that the proposed scheme can reduce the network selection error compared with the conventional scheme which use the measured instantaneous value. In this paper, we study the effect of selection error reduction for the user throughput. It is shown that the proposed scheme can improve the user throughput compared with the conventional scheme within the feasible positional accuracy by computer simulation.

  200. Transmission Performance of QZSS Short Message Communication SS-CDMA in Rayleigh Fading Environment

    AKIMOTO Kohei, MIYAKE Yuji, KAMEDA Suguru, TAIRA Akinori, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. RCS　114　(86)　31-36　2014/06/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Quasi-Zenith Satellite System (QZSS) is expected to provide a high accurate positioning service and allows two-way communication which includes the terminal position information and short messages. In this paper, transmission performance of spread spectrum code division multiple access (SS-CDMA) system in fading environment is evaluated. In urban areas, it will be assumed that a transmission channel becomes one-path Rayleigh fading environment because terminals communicate with the geostationary satellite of 45 ascending vertical angles. We examined the fundamental transmission performance of one-path Rayleigh fading environment using computer simulation when the frequency and time synchronization among all terminals, and channel estimation is ideal. It was shown that can respond to movement of the users to around 12 km/h with interleave in state near accommodation rate 100 % of the full load of CDMA. Moreover, when the number of accommodation users was reduced in half from the full load, it was shown that the same performance as the PER characteristics of about 12 km/h can be obtained at the time of the movement speed of about 36 km/h.

  201. Estimation method for an asymmetric waveform in 1-bit digital RF transmitter

    MAEHATA Takashi, KAMEDA Suguru, SUEMATSU Noriharu

    IEICE technical report. SR, Smart radio　114　(44)　103-109　2014/05/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    The output of 1-bit digital radio frequency (1-bit DRF) transmitter, using a bandpass delta sigma modulator, ideally has a rectangular waveform and a realistic waveform having a blunt waveforms due to a slew rate for an analog circuit is not enough. Recent works report that its time waveform which includes asymmetrical component on the time axis generates a distortion on an adjacent channel and that its component can be compensated for by feedforward distortion compensation technology. In order to compensate for it on an eye pattern output by the 1bit DRF transmitter, it should be precisely measured by a high-speed oscilloscope. However, under a broadband measurement condition, a noise makes a line width of the eye pattern wider, which makes it difficult to measure a precise asymmetric component. Therefore, we propose a new estimation method for the whole of the asymmetric component by measuring an asymmetric component included in a bandwidth including double side adjacency channel in the frequency domain.

  202. Technology Exhibit : Satellite Communication Networks Valid for Disaster Recovery : Development of Multi-Mode VSAT Using SDR Technology

    KAMEDA Suguru, OGUMA Hiroshi, SASANUMA Mitsuru, EGUCHI Shigeru, KURODA Komei, SUEMATSU Noriharu

    IEICE technical report. SR, Smart radio　114　(44)　49-56　2014/05/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In situation of large-scale disaster, land communication infrastructure was seriously damaged. The importance of secure satellite communication such as very small aperture terminal (VSAT) systems has been recognized. In order to satisfy the various demands for the urgent life line recovery, we have started an R&D project of "Satellite Communication Networks Valid for Disaster Recovery" as the next generation VSAT system.

  203. QZSS Short Message SS-CDMA Communication : Performance Evaluation of Efficient Random Access Control Scheme with Reservation Channel

    KAMEDA Suguru, TAKAHASHI Tomohide, MIYAKE Yuji, TAIRA Akinori, YAMAGATA Fumihiro, OGUMA Hiroshi, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. SAT　114　(27)　11-16　2014/05/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Quasi-Zenith Satellite System (QZSS) is expected to provide a high accurate positioning service and allows two-way communication which includes terminal location and short messages. For realizing random access control scheme of the QZSS short message communication, we have proposed flag method and reservation channel (R-Ch) scheme. By applying the flag method to frame slotted ALOHA, optimal channel efficiency of random access condition can be achieved constantly. The R-Ch scheme improves an upper limit of channel efficiency. In this paper, necessary time of accommodating 3 million mobile terminals when using the flag method and R-Ch combination are shown.

  204. Channel Quality Map Construction Scheme using Multi-GNSS Signals for Heterogeneous Wireless Network

    OGUMA Hiroshi, Norishima Keita, KOIZUMI Atushi, YAMAGATA Fumihiro, KUBONIWA Junpei, KAMEDA Suguru, SUEMATSU Noriharu, TAIRA Akinori, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. SAT　114　(27)　17-20　2014/05/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    The multiple network cells are overlapped in the heterogeneous wireless system, the number of networks which users must discover increases compared to homogeneous wireless system. The geographically signal quality MAP of every cells is effective for network selection without cell detection operation. In this paper, we propose the channel quality map construction scheme using multi-GNSS signals for heterogeneous wireless network. The positioning accuracy with multi-GNSS signals is a realizable level for the channel quality map construction scheme, and we report the implementation of the channel quality map construction scheme.

  205. Design of Reflectarray with Log-periodic Dipole Array Elements

    YOKOKAWA Kei, KONNO Keisuke, CHEN Qiang, KAMEDA Suguru, SUEMATSU Noriharu

    IEICE technical report. Antennas and propagation　113　(487)　1-5　2014/03/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Log-Periodic Dipole Array(LPDA) elements are well known as one of ultrawideband antennas. In this report, a reflectarray with LPDA elements is designed and the bandwidth of the reflectarray is numerically demonstrated. In addition, it is shown that the bandwidth of the reflectarray is affected by number of dipole elements in the LPDA elements.

  206. B-5-140 Evaluation of WLAN Control Scheme Using Separated Channel with Control Delay

    Huang M., Miyake Y., Kameda S., Taira A., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　535-535　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  207. B-1-145 Wideband Reflectarray Composed of Log-periodic Dipole Array Element

    Yokokawa Kei, Konno Keisuke, Chen Qiang, Kameda Suguru, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2014　(1)　145-145　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  208. B-3-28 Evaluation of Access Control with Reservation Channel for QZSS SS-CDMA Short Message Communication

    Takahashi T., Miyake Y., Kameda S., Taira A., Yamagata F., Oguma H., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　327-327　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  209. B-3-30 Development of Information of Evacuee Management System by Android Tablet on Next Generation VSAT

    Matsuura Sota, Koizumi Atsushi, Oguma Hiroshi, Kameda Suguru, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2014　(1)　329-329　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  210. B-3-29 Effect of Phase Noise in QZSS SS-CDMA Short Message Communication

    Miyake Y., Taira A., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　328-328　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  211. B-3-27 Effect of the L1-SAIF Signal and the Elevation Angle of the Quasi-Zenith Satellite

    Norishima K., Oguma H., Yamagata F., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　326-326　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  212. B-17-42 Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System : Evaluation with ITU-R Propagation Model

    Kuboniwa J., Miyake Y., Kameda S., Taira A., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　621-621　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  213. BI-3-1 SS-CDMA Short Message Communication using QZSS

    Taira Akinori, Miyake Yuji, Kameda Suguru, Suematsu Noriharu, Takagi Tadashi, Tsubouchi Kazuo

    Proceedings of the IEICE General Conference　2014　(1)　"SS-60"-"SS-61"　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  214. C-2-31 0.8-5.7GHz Band Multi-Band Direct Digital RF Quadrature Modulator

    Wada O., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　61-61　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  215. C-2-2 Test Production of a 5GHz/60GHz Receiver Front-End CMOS IC

    Inagaki Ryuji, Tanaka Toshiyuki, Tsuru Masaomi, Taniguchi Eiji, Fukumoto Hiroshi, Kameda Suguru, Suematsu Noriharu, Takagi Tadashi, Tsubouchi Kazuo

    Proceedings of the IEICE General Conference　2014　(1)　32-32　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  216. C-2-30 A Study on Low Power Consumption / Broadband 5-bit Baseband Phase Shifter using Fixed Gain Amplifier Matrix

    Nakamura M., Ta T. T., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　60-60　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  217. C-2-3 A 2GHz Si-CMOS Triple Cascode Push-Pull Power Amplifier

    Fujii K., Terajima K., Sonoda T., Takagi T., Nakayama E., Kameda S., Suematsu N., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　33-33　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  218. C-2-112 3-D CT Scans Evaluation of a 60 GHz Band 2x4-Element PAA Module Using 3-D SiP Structure

    Ye W., Suzuki Y., Yoshida S., Tanifuji S., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　142-142　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  219. C-2-47 A 2GHz Band Balun with branching filter using multi-layered organic substrates

    Terajima K., Fujii K., Sonoda T., Takagi T., Nakayama E., Kameda S., Suematsu N., Tsubouchi K.

    Proceedings of the IEICE General Conference　2014　(1)　77-77　2014/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  220. A Proposal of WLAN Control Scheme Using Separated Channel

    HUANG Minzhi, MIYAKE Yuji, KAMEDA Suguru, TAIRA Akinori, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　113　(457)　83-88　2014/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Recently, the requirement of wireless communication is increasing dramatically. Heterogeneous network which includes cellular networks and wireless local area network (WLAN) is a solution to the problem. In the area of cellular networks with high user density, WLAN system is used to migrate data traffic. Unfortunately, the media access control protocol in WLAN, carrier sense multiple access with collision avoidance (CSMA/CA), would lead to a low throughput for some mobile terminals (MTs) when the MTs are in noisy condition. Because these MTs have larger size of contention window than other MTs. In this paper, an improved control scheme with separated control channel for WLAN is proposed. In this way throughput of MT in noisy condition can be improved.

  221. QZSS Short Message SS-CDMA Communication : Access Control with Reservation Channel

    TAKAHASHI Tomohide, MIYAKE Yuji, KAMEDA Suguru, TAIRA Akinori, YAMAGATA Fumihiro, OGUMA Hiroshi, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. RCS　113　(456)　157-162　2014/03/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Quasi-Zenith Satellite System (QZSS) is expected to provide a high accurate positioning service and allows two-way communication which includes the terminal location and short messages. We have proposed Flag method as an access control scheme designed for QZSS short message SS-CDMA communication. By applying Flag method to Frame Slotted ALOHA, the optimal channel efficiency of random access condition can be achieved constantly. However, it remains low even in optimum condition. In this paper, we propose reservation channel (R-Ch) as an access control scheme which improve an upper limit of channel efficiency. Necessary time of accommodating 3 million mobile terminals when using Flag method only and R-Ch and Flag method are shown. R-Ch and Flag method can reduce the time by half compared with Flag method only.

  222. Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System

    KUBONIWA Junpei, MIYAKE Yuji, KAMEDA Suguru, TAIRA Akinori, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　113　(400)　57-62　2014/01/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    For the next generation mobile communication, heterogeneous wireless system has been discussed to attain high throughput and wide coverage. Since multiple network cells overlap in the heterogeneous wireless system, the number of networks which users must discover increases compared to homogeneous wireless system. In the future, a large number of small cells will be deployed for traffic offload. Because users must discover a lot of networks increasingly, radio resources are more used for network discovery and frequent selection error of networks occurs. In this paper, network selection scheme using signal quality maps is proposed for data traffic optimization. In the proposed scheme, the signal quality maps are made by gathering signal qualities information with position from each terminals in advance. Users can select network which has a better channel quality fast and easily by using signal quality maps. We show that the proposed scheme can reduce the selection error of networks compared with the scheme which uses measured instantaneous values within the feasible positional accuracy by computer simulation.

  223. Channel Estimation Scheme for QZSS Short Message Communication SS-CDMA

    TAIRA Akinori, MIYAKE Yuji, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　113　(360)　107-112　2013/12/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Quasi-Zenith Satellite System (QZSS) is expected to provide a high accurate positioning service and allows two-way communication which includes the terminal location and short messages. In this paper, channel estimation schemes for SS-CDMA system are evaluated. SS-CDMA realizes the direct access from terminals to the satellite and many users simultaneous transmission using large spreading factor SS-codes. So, high accurate and high efficient pilot multiplexing method is desired. The performance of delay detection, time division multiplexing (TDM) pilot and code division multiplexing (CDM) pilot have been evaluated in AWGN channel with computer simulation. We show the trade-off among the number of multiplexing user, SNR and expected maximum frequency offset. Additionally, we reveal that the influence of phase noise is less than 1.0 dB E_b/N_0 degradation.

  224. Satellite Communication Networks Valid for Disaster Recovery : Multi-Mode SDR VSAT

    KAMEDA Suguru, OGUMA Hiroshi, SASANUMA Mitsuru, EGUCHI Shigeru, KURODA Komei, SUEMATSU Noriharu

    IEICE technical report　113　(360)　101-106　2013/12/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In situation of large-scale disaster, land communication infrastructure was seriously damaged. The importance of secure satellite communication such as very small aperture terminal (VSAT) systems has been recognized. In order to satisfy the various demands for the urgent life line recovery, we have started an R&D project of "Satellite Communication Networks Valid for Disaster Recovery" as the next generation VSAT system in which following three research topics are included: (1) multi-mode VSAT based on software defined radio technology, (2) low power consumption portable VSAT, and (3) emergency mode adaptive bandwidth control technique for HUB earth station.

  225. 7.6 Micro-Wave/Millimeter-Wave All Si CMOS Multiband Receiver Front-End IC(7. Responsiveness,<Special Survey>Dependable VLSI System)

    NAKAYAMA Masatoshi, TANAKA Toshiyuki, INAGAKI Ryuji, TSURU Masaomi, TANIGUCHI Eiji, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    The journal of Reliability Engineering Association of Japan　35　(8)　485-485　2013/12/01

    Publisher: Reliability Engineering Association of Japan (REAJ)

    ISSN： 0919-2697

  226. Performance Evaluation of QZSS Short Message Communication SS-CDMA with Frequency Offset

    TAIRA Akinori, MIYAKE Yuji, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. RCS　113　(301)　67-72　2013/11/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Quasi-Zenith Satellite System (QZSS) is expected to provide a high accurate positioning service and allows two-way communication which includes the terminal location and short messages. In this paper, SS-CDMA system performance with frequency offset among terminals and phase noise is evaluated. SS-CDMA realizes the direct access from terminals to the satellite and many users simultaneous transmission using large spreading factor SS-codes. In order to achieve this objective, keeping orthogonality among all terminals is important issue. We propose a novel transmit AFC (Automatic Frequency Control) method in which all terminals are synchronized in time and frequency domains using QZSS. BER performances in 1024 chip SS-code and 1000 user multiplexing condition are shown. Each user is assigned 1 chip rotational shift SS-code based on an orthogonal M-sequence. 1/8 normalized frequency offset in symbol rate can provides the performance with less than 1.0 dB E_b/N_0 degradation.

  227. Technology Exhibit : ASIC Implementation and Evaluation of Frequency Domain Equalizer for Dependable Air

    KUBONIWA Junpei, KOMATSU Kazuhiro, MIYAKE Yuji, KAMEDA Suguru, IWATA Makoto, TAIRA Akinori, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　113　(266)　29-34　2013/10/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In the next generation mobile communication systems, we have proposed the Dependable Air to attain high throughput and wide coverage, which is combination of multiple wireless systems. For the Dependable Air, a multi-mode receiver with multiple air interfaces is required. In this paper, we discuss an application specific integrated circuit (ASIC) implementation of the multi-mode frequency domain equalization (FDE) circuit for such a multi-mode receiver. The implemented multi-mode FDE ASIC could realize equalization of signals in different two wireless systems (single carrier and multi carrier) while selecting a better system depending on propagation environment adaptively. Evaluating bit error rate performances, it is shown that proposed multi-mode FDE is useful to realize multi-mode receiver for the Dependable Air.

  228. Satellite Communication Networks Valid for Disaster Recovery

    Suematsu Noriharu, Kameda Suguru, Oguma Hiroshi, Sasanuma Mitsuru, Eguchi Shigeru, Nakane Hideki

    Technical report of IEICE. SAT　113　(258)　65-70　2013/10/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    As a result of the great east Japan earthquake, terrestrial communication infrastructure was seriously damaged. Thus the importance of secure satellite communication measures based on very small aperture antenna terminal (VSAT) systems has been recognized. In order to satisfy the various demands for urgent life line recovery, we have started an R&D project of "Satellite Communication Networks Valid for Disaster Recovery" as the next generation VSAT system supported by the Ministry of Internal Affairs and Communications of Japan. This project contains following three research topics. (1) multi-mode VSAT's based on software defined radio (SDR) technology, (2) low power consumption VSAT's and (3) emergency mode adaptive bandwidth control technique for HUB earth station.

  229. A 60-GHz Band 3-D Phased Array Antenna Module for Hetero-Plane Beam Synthesis

    SUZUKI Yuya, YOSHIDA Satoshi, KAMEDA Suguru, SUEMATSU Noriharu, TAIRA Akinori, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. Antennas and propagation　113　(203)　1-6　2013/09/12

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We propose a 3-dimensional,(3-D) phased array antenna,(PAA) module having two separated 2×2 end-fire dipole array antenna. By combining the beams emitted from two separated array antennas (hetero-plane beam synthesis), wider coverage area in azimuth direction can be obtained which exceeds twice of each array antenna. By the electromagnetic simulation, 1.0λ_0 is selected as a optimal array spacing between the orthogonal array and the edge of module. This array spacing brings higher gain and wider beam width for beam forming under the assumption of the use of 3-bit phase shifter with easier implementation. Measured radiation patterns are in agreement with simulated radiation patterns and 10,dBi beam coverage area of 150° in azimuth is obtained. The coverage area is wider than twice of the single-plane PAA's area,(60°).The results show the effectiveness of proposed hetero-plane beam synthesis.

  230. Oversampling Performance of 2 GHz-Band Direct Digital RF Modulator Using Current-Mode DAC

    Wada O., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2013　(1)　39-39　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  231. A 2.0GHz Band Si-CMOS Triple Cascode Power Amplifier

    Terajima K., Fujii K., Takagi T., Nakayama E, Kameda S., Suematsu N., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2013　(1)　53-53　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  232. Self-Directed Beam Forming System with Low Loop Control for Millimeter-Wave Array Antenna

    Nakamura M., Ta T.T., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2013　(1)　117-117　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  233. C-2-21 Direct RF Under Sampling Reception with Lower Sampling Frequenc

    Banda D., Wada O., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2013　(1)　46-46　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  234. Design of a 60 GHz Band 3-D Phased Array Antenna Module for Hetero-Plane Beam Synthesis

    Suzuki Y., Yoshida S., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2013　(1)　84-84　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  235. Proposal of the QZSS Short Message Communication Considered the Evacuation Level

    Mukaida S., Koizumi A., Oguma H., Yamagata F., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2013　(1)　283-283　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  236. A Study on Applications of Multimode VSAT System

    Kuroda Komei, Ueno Susumu, Nakane Hideki, Kameda Suguru, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2013　(1)　305-305　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  237. A study on DAMA Bandwidth Assignment for Web-based Network Traffic

    Nakane Hideki, Yoshikawa Noriaki, Aoki Makoto, Kameda Suguru, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2013　(1)　304-304　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  238. Effect of Transmit Timing Error in QZSS SS-CDMA Short Message Communication

    Taira Akinori, Miyake Yuji, Kameda Suguru, Suematsu Noriharu, Takagi Tadashi, Tsubouchi Kazuo

    Proceedings of the Society Conference of IEICE　2013　(1)　279-279　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  239. Effect of Frequency Offset in QZSS SS-CDMA Short Message Communication

    Miyake Y., Taira A., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2013　(1)　280-280　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  240. A Study on Design Method of Multimode VSAT System Based on Link Budget

    Fujiki Takashi, Ueno Susumu, Yoshikawa Noriaki, Kameda Suguru, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2013　(1)　306-306　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  241. Verification of GPS Augmentation by the L1"-"SAIF Signal of QZSS under Low Elevation Angle

    Norishima K., Oguma H., Yamagata F., Kameda S., Suematsu N., Taira A., Takagi T, Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2013　(1)　282-282　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  242. Evaluation of Access Control with Flag Method for QZSS SS-CDMA Short Message Communication

    Takahashi T., Miyake Y., Yamagata F., Oguma H., Kameda S., Suematsu N., Taira A., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2013　(1)　281-281　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  243. A Study on Link Control of Multimode VSAT System

    Sakashita Takabumi, Nakane Hideki, Tsuji Hisao, Kameda Suguru, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2013　(1)　307-307　2013/09/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

  244. Performance Evaluation of QZSS Short Message Communication SS-CDMA with Transmit Timing Error

    TAIRA Akinori, MIYAKE Yuji, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. RCS　113　(194)　51-56　2013/08/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Quasi-Zenith Satellite System (QZSS) is expected to provide a high accurate positioning service and allows two-way communication which includes the terminal position information and short messages. In this paper, SS-CDMA system performance with timing jitter among terminals is evaluated. SS-CDMA realizes the direct access from terminals to the satellite and many users simultaneous transmission using large spreading factor SS-codes. In order to achieve this objective, keeping orthogonality among all terminals is important condition. We propose a novel transmit timing control method in which all terminals are synchronized in time and frequency domains using QZSS. BER performances in 1024 chip SS-code and 1000 user multiplexing condition are shown. Each user is assigned 1 chip rotational shift SS-code based on an orthogonal M-sequence. 1/8 chip timing jitter can provides the performance with less than 0.5 dB E_b/N_0 degradation.

  245. 2GHz-Band CMOS Direct Digital RF Modulator Using Oversampling Current-Mode DAC

    WADA Osamu, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. OPE　113　(142)　97-102　2013/07/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We have proposed a direct digital RF modulator which consists of a higher order oversampling current-mode differential DAC and LO switches attached to the output of the current-mode DAC. To reduce the spurious emission and to satisfy the spectrum mask of W-CDMA, the bit number and sampling frequency (number of oversampling orders) were designed. The modulator IC (8 bit, 100 MSample/s (25 times oversampling)) has been fabricated in 90-nm CMOS process and it achieves SNR of 57.3 dB, IM_3 of -39.6 dBc and IM_5 of -52.5 dBc. The spurious free (<-50 dBc/100 kHz) frequency range of 197 MHz is also obtained.

  246. High Power Handling 60GHz Transmit/Receive Switch Using Series/Shunt FETs in 90nm Si-CMOS Process

    TANIFUJI Shoichi, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. Microwaves　113　(110)　59-64　2013/06/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    90 nm Si-CMOS high power handling Transmit/Receive (T/R) Switch is proposed for 60 GHz wireless applications. By adopting series and shunt FETs circuit configuration and by employing large FET gate width of 320 μm, high transmit power handling capability is achieved. Since the use of large FET gate width degrades the insertion loss and isolation in the receive mode, a microstrip line is connected between the source and drain to make resonance with C_<off> of the FET at 60 GHz in off-state. Simulated result shows that the designed T/R switch has over 1 W transmit power handling capability at 60 GHz. Fabricated results show the linear transfer characteristics up to 24.8 dBm at 60 GHz and 36.5 dBm at 36 GHz in transmit mode. Both upper limits comes from the limitation of measurement setup and we expect that this T/R switch has over 1 W power handling at 60 GHz.

  247. Principal Technology Development for 1-bit Digital RF Transmitter

    MAEHATA Takashi, TOTANI Kazuyuki, KAMEDA Suguru, SUEMATSU Noriharu

    IEICE technical report　113　(57)　9-15　2013/05/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We describe principal technology development for 1-bit digital radio frequency (DRF) transmitter comprising a band-pass delta-sigma modulator (BP-DSM). This 1-bit DRF transmitter outputs radio signals generated only by a digital circuit instead of an analog circuit. In addition, the DRF transmitter can handle arbitrary modulated waveform as the 1-bit digital pulse train and regenerate the radio signal through a band pass filter. Therefore, this digital RF system is a kind of a bandpass transmission system and also a baseband transmission system to handle shape of the square wave. This technology has possibility to realize a high flexibility that the optical communication fuses with the wireless communication and shows us one directionality of the future communication systems. As for the thing of the above-mentioned recognition, we report various principal technologies which are a concurrent dual-band transmitter, a new channel coding and so on.

  248. Direct RF Under Sampling Reception Method with Lower Sampling Frequency

    BANDA Daliso, WADA Osamu, TA Tuan Thanh, TANIFUJI Shoichi, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　113　(57)　57-62　2013/05/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    RF undersampling receiver topology offers many advantages; these include software re-configurability, low power consumption and compact circuits. The main advantage comes from the fact that a sampling frequency lower than the RF carrier is utilized. But when applied to a Ku-band VSAT system with 500MHz bandwidth, a minimum sampling frequency of 1GHz is required. Based on technology currently commercially available this makes it difficult to implement a low power portable device for such a system using this conventional RF under sampling technique. In this paper we propose a direct RF under sampling reception method that halves the sampling frequency required. By using SNR and EVM as performance indexes, the proposed technique has been evaluated by simulation and experimentation. The evaluation results are also presented and show that the proposed technique can achieve the same performance as conventional RF under sampling but at half the sampling frequency.

  249. A Novel Channel Coding Scheme for 1-bit Digital RF Transmitter Using Band-Pass Delta-Sigma Modulator

    MAEHATA Takashi, TOTANI Kazuyuki, KAMEDA Suguru, SUEMATSU Noriharu

    Technical report of IEICE. SAT　113　(32)　51-56　2013/05/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We propose a novel channel coding scheme for 1-bit digital radio frequency (DRF) transmitter comprising a band-pass delta-sigma modulator (BP-DSM). This 1-bit DRF transmitter outputs radio signals generated only by a digital circuit instead of an analog circuit. In addition, the DRF transmitter can handle arbitrary modulated waveform as the 1-bit digital pulse train and regenerate the radio signal through a band pass filter, thereby making it easy to transmit RF signal on a digital optical link whenever using DRF signal as the digital data. However, the optical link usually does not send data having long run length and has to use a channel coding such as 8B10B, 64B66B and manchester coding, which needs additional data and causes DRF power spectrum change. To this end, we propose a novel channel coding scheme able to control the run length without any additional data while converting the RF signal to a 1 bit digital train.

  250. System Handover for Heterogeneous Wireless Network Considering Number of Mobile Terminal

    KOBAYASHI KAZUMASA, HUANG MINZHI, MIYAKE YUJI, YAMAGATA FUMIHIRO, OGUMA HIROSHI, IIZUKA NOBORU, KAMEDA SUGURU, SUEMATSU NORIHARU, TAKAGI TADASHI, TSUBOUCHI KAZUO

    電子情報通信学会技術研究報告　113　(57(SR2013 1-20))　65-70　2013/05/16

    ISSN： 0913-5685

  251. A Study of Design Method for Reflectarray by Induced Electromotive Force Method

    KONNO Keisuke, CHEN Qiang, SAWAYA Kunio, KAMEDA Suguru, SUEMATSU Noriharu

    IEICE technical report. Antennas and propagation　112　(491)　1-5　2013/03/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A design method of reflectarray by the induced electromotive force method is proposed. The effect of the angle of incidence from a primary source to a reflect array element is included in the design process of the reflectarray by the proposed method. The CPU time for design of the reflectarray by the proposed method is short because mutual coupling between reflectarray elements is ignored. The reflectarray which consists of a dipole and parasitic dipole element is designed by the proposed method and the performance of the proposed method is shown. In addition, improvement of the gain of the designed reflectarray is carried out.

  252. 準天頂衛星による位置捕捉精度の検討

    則島景太, 小熊博, 山形文啓, 亀田卓, 末松憲治, 高木直, 坪内和夫

    全国大会講演論文集　2013　(1)　203-205　2013/03/06

    Publisher: 一般社団法人情報処理学会

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    準天頂衛星は従来,高精度な測位を実現するミッションを想定してきたが,東日本大震災を契機に災害時にも対応できるロケーション・ショートメッセージ通信機能が求められている.カーナビ,携帯電話などのGPS(Global Positioning System)受信機を内蔵する通信端末に本機能を加え,災害時には端末の位置情報とともに安否情報などの極めて短いメッセージを衛星経由で送信することを想定している.本報告では,準天頂衛星の位置捕捉精度についての実測を実施しGPSと比較して解析した結果について報告する.

  253. B-17-30 Zero IF Direct RF Under Sampling Reception with Lower Sampling Frequency

    Banda D., Wada O., Ta T.T., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2013　(1)　674-674　2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  254. C-2-22 A60-GHz Band Si-CMOS Receiver RFIC for 5-bit BB Beam Forming

    Ta T.T., Nakayama E., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2013　(1)　53-53　2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  255. C-2-21 5GHz-Band CMOS Direct Digital RF Modulator Built-in Load Resistance Using Current-Mode DAC

    Wada O., Ta T. T., TanifUji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2013　(1)　52-52　2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  256. B-3-9 Capacity of SS-CDMA on Wireless Access for Location and Short Message Communication System Using QZSS

    Miyake Y., Takahashi T., Yamagata F., Oguma H., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2013　(1)　318-318　2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  257. B-3-10 Access Control with Flag Method for Location and Short Message Communication System Using QZSS

    Takahashi T., Miyake Y., Yamagata, Oguma H., Kameda S., Suematsu N., Takagi T., Tsubouchi K

    Proceedings of the IEICE General Conference　2013　(1)　319-319　2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  258. B-3-6 Feasibility Study on the Information of Evacuee Management System With VSAT

    Oguma H., Ohba Y., Koizumi A., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2013　(1)　315-315　2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  259. C-2-55 A Planar Type Miniaturized Balun Using a X/4 Coupled Line and a Parallel Resistor

    Takagi T, Nakayama E, SuzUki Y, Kameda S, Suematsu N, Tsubouchi K

    Proceedings of the IEICE General Conference　2013　(1)　86-86　2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  260. B-1-138 Design of Linear Element Reflectarray by Using Induced Electromotive Force Method

    Konno Keisuke, Chen Qiang, Sawaya Kunio, Kameda Suguru, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2013　(1)　138-138　2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  261. B-8-12 Concurrent Multi-Carrier Transmitter using 1 -bit Band-Pass Delta Sigma Modulator

    Maehata Takashi, Totani Kazuyuki, Kameda Suguru, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2013　(2)　247-247　2013/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  262. Research and Development of Satellite Communication Networks Valid for Disaster Recovery (1) Targets of R&D Project

    MINEMATSU N., NAKAMURA I., SUZUKI M., HIRANO H., NAKAGAWA C., NAKAMURA N., TAGAWA Y., HIROSE K., HASHIMOTC H.

    IEICE technical report. Speech　112　(439)　1-6　2013/02/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Through tight collaboration with teachers of Japanese, an online accent dictionary and a reading tutor are developed to support teaching and learning of Japanese prosody. In this development, techniques of natural language processing and spoken language processing are effectively applied. What makes teaching and learning of Japanese accent difficult is the fact that word accent of Japanese often changes due to its context. In this paper, firstly, we focus on verbs and adjectives because their accent changes are relatively systematic. A web-based dictionary system of presenting their accent changes visually, auditorily, and comprehensively is developed. Then, another tutoring system of displaying the pitch pattern and the accent nucleus locations of an any given sentence is developed for teaching and learning of Japanese intonation. Objective and/or subjective evaluation experiments are done for these systems by using teachers and students of Japanese as subjects. The results show very high educational effectiveness of the systems. Currently, the systems are freely available in public under the name of OJAD (Online Japanese Accent Dictionary) and they are effectively used in Japanese classes all over the world.

  263. Research and Development of Satellite Communication Networks Valid for Disaster Recovery (2) A Study on Applications of Multimode VSAT System

    SUEMATSU Northam, KAMEDA Suguru, TAKAGI Tadashi, TSUBOUCHI Kazuo, UENO Susumu, NAKANE Hideki, YOSHIKAWA Noriaki, OGUMA Hiroshi, UCHIYAMA Hiroshi

    Technical report of IEICE. SAT　112　(440)　11-16　2013/02/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    There are strong desires for urgent satellite link establishment in order to recover communication lines in large-scale disaster like the Great East Japan Earthquake Based on the VSATs usage data in this massive disaster, this paper tries to extract potential uses of a small portable VSAT This paper shows that multi-mode VSAT enables effective usage of recovermg method for disaster area communication systems

  264. Research and Development of Satellite Communication Networks Valid for Disaster Recovery (3) A Study on Control Method for Multimode VSAT System

    SUEMATSU Noriharu, KAMEDA Suguru, TAKAGI Tadashi, TSUBOUCHI Kazuo, UENO Susumu, NAKANE Hideki, KIDO Mitsuji, AOKI Makoto, UCHIYAMA Hiroshi

    Technical report of IEICE. SAT　112　(440)　17-22　2013/02/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Conventional VSAT's have been developed as dedicated equipment for specified satellite communication system However, the Great East Japan Earthquake made us be aware of not only demand for a large number of VSAT's but also needs for multi-mode VSAT which has versatile applicability for multiple satellite communication system according to the communication requirement alter with time This paper have analyzed about the issues to make multi-mode VSAT put into practice, studied about control method to sight on plural satellite communication system and simulated the antenna driving process to train on the targeted satellites and the way to cope with bursty IP traffic after disaster occurrence

  265. Research and Development of Satellite Communication Networks Valid for Disaster Recovery (4) A Study of Satellite Links Design Criteria for Multimode VSAT Systems

    SUEMATSU Nonharu, KAMEDA Suguru, TAKAGI Tadashi, TSUBOUCHI Kazuo, FUJIKI Takashi, AOKI Makoto, YOSHIKAWA Noriaki, UCHIYAMA Hiroshi

    Technical report of IEICE. SAT　112　(440)　23-28　2013/02/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    There are strong desires for urgent satellite link establishment in order to recover communication lines inlarge-scale disaster like the Great East Japan Earthquake Based on the VSATs usage data in this massive disaster, this paper tries to extract potential uses of a small portable VSAT This paper shows that a study of satellite links design cntena ofvarious antenna size and BER in the Ku band

  266. Research and Development of Satellite Communication Networks Valid for Disaster Recovery (1) Targets of R&D Project

    SUEMATSU Nonharu, KAMEDA Suguru, OGUMA Hiroshi, SASANUMA Mitsuru, EGUCHI Shigeru, KURODA Komei

    Technical report of IEICE. SAT　112　(440)　5-10　2013/02/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In the event of large-scale disaster, land communication infrastructure was senously damaged and the importance of secure satellite communication measures based on very small aperture antenna terminal (VSAT) systems has been recognized In order to satisfy the various demands for the urgent life line recovery, we have started an R&D project of "Satellite Communication Networks Valid for Disaster Recovery" as the next generation VSAT system in which following three research topics are included (1) multi-mode VSAT's based on software defined radio technology, (2) low power consumption portable VSAT's and (3) emergency mode adaptive bandwidth control technique for HUB earth station

  267. Test Production of a Flip-Chip Assembled 60GHz Receiver Front-End CMOS IC

    TSURU Masaomi, TAKANA Toshiyuki, INAGAKI Ryuji, TANIGUCHI Eiji, NAKAYAMA Masatoshi, KAMEDA Suguru, RUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. Microwaves　112　(312)　63-67　2012/11/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In order to realize high data rate communication, equipment for millimeter-wave communication is developed. For example, as one of the WPAN (Wireless Personal Area Network), IEEE standard of 802.15.3c was standardized on September 2009. It serves four channels between 57GHz to 66GHz. As important issues, there are noise characteristics and assembly. In order to achieve the low noise characteristics, it is useful to increase gain of a LNA. As assembly method in millimeter wave band, flip-chip technology is useful. This paper presents a flip-chip assembled 60GHz receiver front-end CMOS IC. The receiver front-end consists of a 60GHz cascode LNA, a balun, a harmonic mixer, and an IF amplifier fabricated by 90nm CMOS. The fabricated flip-chip assembled cascode LNA performs 31.1dB gain as well as on-wafer probing with NF of 5.8dB and output P1dB of -3.9dBm at 60GHz while consuming 26.9mW. The flip-chip assembled receiver front-end performs 21.3dB of conversion gain and 7.2dB of NF while consuming 50.9mW.

  268. 60-GHz Band 2×4-Element Array Antenna Module Using 3-D SiP Structure

    SUZUKI Yuya, YOSHIDA Satoshi, TANIFUJI Shochi, KAMEDA Suguru, RUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. Microwaves　112　(251)　129-134　2012/10/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In this paper, an antenna module for 60-GHz band beamforming which can form two dimensional beam in the endfire direction of a module substrate is proposed. In order to realize a high antenna gain, five dielectric substrates are stacked using 3-D (Dimensional) SiP (System-in-Package) structure. In addition, the 2×4-element dipole array antenna which has an element spacing of half-wave length in not only the horizontal but also the vertical directions to the substrate is developed. Furthermore, power dividers and delay lines are built to each substrate. BFN (Beam Forming Network) which feeds to the 2×4-element is realized by 60-GHz band signal feed between stacked substrates using Copper ball currently used for the BGA (Ball Grid Array) package.

  269. A Novel 1-bit Feedforward Distorted Compensation for Bandpass ΔΣ Modulation

    MAEHATA Takashi, TOTANI Kazuyuki, KAMEDA Suguru, SUEMATSU Noriharu

    IEICE technical report　112　(242)　71-78　2012/10/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We propose a novel 1-bit feedforward distorted compensation technology in a direct radio frequency converter (DRFC) which is a kind of RF transmitter using bandpass delta-sigma modulation (BP-DSM). BP-DSM efficiently performs high resolution data conversion using oversampling. It can directly output a RF signal from baseband using 1-bit digital pulse train with a rectangular waveform and but, recently related works reported that an adjacent channel leakage ratio (ACLR) deteriorates when this waveform is off an ideal waveform. Proposal method in this paper can compensate this ACLR and be performed by using a distorted compensation signal with a 1-bit digital pulse train. Therefore this novel method does not need an analog RF circuit for compensation. In simulation, a theoretical approach of proposal method leads to high ACLR 60dB to compensate this distortion even if two kinds of signals are distorted independently. We measured that the proposed method compensates ACLR from 46dB to 50dB in a developed prototype.

  270. A Novel 1-bit Feedforward Distorted Compensation for Bandpass ΔΣ Modulation

    MAEHATA Takashi, TOTANI Kazuyuki, KAMEDA Suguru, SUEMATSU Noriharu

    IEICE technical report　112　(240)　165-172　2012/10/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We propose a novel 1-bit feedforward distorted compensation technology in a direct radio frequency converter (DRFC) which is a kind of RF transmitter using bandpass delta-sigma modulation (BP-DSM). BP-DSM efficiently performs high resolution data conversion using oversampling. It can directly output a RF signal from baseband using 1-bit digital pulse train with a rectangular waveform and but, recently related works reported that an adjacent channel leakage ratio (ACLR) deteriorates when this waveform is off an ideal waveform. Proposal method in this paper can compensate this ACLR and be performed by using a distorted compensation signal with a 1-bit digital pulse train. Therefore this novel method does not need an analog RF circuit for compensation. In simulation, a theoretical approach of proposal method leads to high ACLR 60dB to compensate this distortion even if two kinds of signals are distorted independently. We measured that the proposed method compensates ACLR from 46dB to 50dB in a developed prototype.

  271. A Novel 1-bit Feedforward Distorted Compensation for Bandpass Σ Modulation

    MAEHATA Takashi, TOTANI Kazuyuki, KAMEDA Suguru, SUEMATSU Noriharu

    Technical report of IEICE. RCS　112　(239)　107-114　2012/10/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We propose a novel 1-bit feedforward distorted compensation technology in a direct radio frequency converter (DRFC) which is a kind of RF transmitter using bandpass delta-sigma modulation (BP-DSM). BP-DSM efficiently performs high resolution data conversion using oversampling. It can directly output a RF signal from baseband using 1-bit digital pulse train with a rectangular waveform and but, recently related works reported that an adjacent channel leakage ratio (ACLR) deteriorates when this waveform is off an ideal waveform. Proposal method in this paper can compensate this ACLR and be performed by using a distorted compensation signal with a 1-bit digital pulse train. Therefore this novel method does not need an analog RF circuit for compensation. In simulation, a theoretical approach of proposal method leads to high ACLR 60dB to compensate this distortion even if two kinds of signals are distorted independently. We measured that the proposed method compensates ACLR from 46dB to 50dB in a developed prototype.

  272. C-2-7 5 GHz-Band CMOS Direct Digital RF Modulator Using Current-Mode DAC

    Wada O., Ta T. T., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2012　(1)　33-33　2012/08/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  273. C-2-8 Test Production of a Flip-Chip Assembled 600Hz Receiver Front-End CMOS IC

    Tsuru Masaomi, Tanaka Toshiyuki, Inagaki Ryuji, Taniguchi Eiji, Nakayama Masatoshi, Kameda Suguru, Suematsu Noriharu, Takagi Tadashi, Tsubouchi Kazuo

    Proceedings of the Society Conference of IEICE　2012　(1)　34-34　2012/08/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  274. B-3-11 The Clock Acculacy Evaluation of GPS Clock

    Yamagata F., Oguma H., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2012　(1)　278-278　2012/08/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  275. B-3-12 Feasibility Study on GUI System for Location and Short Message Communication System Using QZSS

    Oguma H., Mukaida S., Koizumi A., Yamagata F., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2012　(1)　279-279　2012/08/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  276. B-1-195 A 3D Radiation Pattern Measurement System for a Miniature Millimeter Wave Antenna

    Ta T. T., Yoshida S., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2012　(1)　195-195　2012/08/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  277. B-1-107 60 GHz Band 3-D SIP Structure 2×4 Dipole Array Antenna with Reduced Mutual Coupling in Vertical Direction

    Suzuki Y., Yoshida S., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2012　(1)　107-107　2012/08/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  278. 伝達関数の落ち込みを考慮したチャネル選択:誤り訂正の効果

    小林和正, 三宅裕士, 小熊博, 飯塚昇, 飯塚昇, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集　2012　518　2012/08/28

    ISSN： 1349-1369

  279. シングルキャリア/マルチキャリアハイブリッド通信方式の検討:マルチセル環境下におけるアップリンクのスループット特性評価

    三宅裕士, 小熊博, 飯塚昇, 飯塚昇, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集　2012　457　2012/08/28

    ISSN： 1349-1369

  280. Distortion Compensation Circuit Techniques for Radio Frequency Transmitters

    SUEMATSU Noriharu

    IEICE technical report. WBS, Wideband System　112　(50)　47-54　2012/05/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Distortion components in transmitted signals are mainly generated due to the nonlinearities of high power amplifier of radio frequency transmitters. Since the distortion degrades the modulation characteristics (such as Error Vector Magnitude, EVM) and interferes neighborhood users in the next channels, the distortion compensation techniques are important. In this paper, the basis of various types of distortion compensation techniques is described and some of the examples are introduced with actual applications.

  281. Feasibility Study on Wireless Access for Location and Short Message Communication System Using QZSS

    KAMEDA Suguru, SUEMATSU Noriharu, YAMAGATA Fumihiro, OGUMA Hiroshi, TAKAGI Tadashi, TSUBOUCHI Kazuo

    Technical report of IEICE. SAT　112　(51)　35-40　2012/05/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    The main mission of Quasi-Zenith Satellite System (QZSS) is high accurate positioning system. After the great East-Japan earthquake on March 11th, 2011, an additional mission of QZSS has been discussed and a location and short message satellite communication system is proposed which is effective for the large scale disaster relief. In this report, the outline of proposed location and short message QZSS communication system using spread spectrum code division multiple access (SS-CDMA) technology is described. For realizing large capacity return link (from mobile terminals to Quasi-Zenith Satellite (QZS)), we discuss wireless access method for QZSS using approximately synchronized (AS) CDMA and 1-bit flag radio frequency identification (RFID) inventory method.

  282. Distortion Compensation Circuit Techniques for Radio Frequency Transmitters

    SUEMATSU Noriharu

    Technical report of IEICE. SAT　112　(51)　41-48　2012/05/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Distortion components in transmitted signals are mainly generated due to the nonlinearities of high power amplifier of radio frequency transmitters. Since the distortion degrades the modulation characteristics (such as Error Vector Magnitude, EVM) and interferes neighborhood users in the next channels, the distortion compensation techniques are important. In this paper, the basis of various types of distortion compensation techniques is described and some of the examples are introduced with actual applications.

  283. 1-Bit RF Digital Transmitter Using a Bandpass ΔΣ Modulator

    MAEHATA Takashi, KAMEDA Suguru, SUEMATSU Noriharu

    IEICE technical report　112　(55)　49-52　2012/05/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We have developed a prototype of 1-bit direct radio frequency converter which is a kind of RF transmitter using bandpass delta-sigma modulator (BP-DSM). This prototype generates a radio signal from a digital circuit without the digital analog converter (DAC). We transmitted a pair of 1 carrier with 5 MHz bandwidth of LTE at 300 MHz using BP-DSM to aim the MIMO, with an ACLR of 47 dB.

  284. 60-GHz Band Beamforming Array Antenna Using 3-D SiP Structure

    YOSHIDA Satoshi, SUZUKI Yuya, TA Tuan Thanh, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　112　(55)　1-8　2012/05/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In this paper, a 60-GHz band planar dipole array antenna structure in a small wireless terminal is proposed for wide coverage area beamforming application. Five substrates are stacked vertically using the 3-dimensional (3-D) system-in-package (SiP) technology, and the element antenna is arranged in the top and bottom substrates. A planar dipole antenna is used as an element antenna. As a result of the design using the numerical simulation and 3-D electromagnetic field simulation, 4×2 arrangement is feasible structure for a small wireless terminal with wide coverage area. Measured results show the designed array antenna has wide coverage area, which covers 70 degree and 90 degree for theta and phi direction with the gain exceeds 10 dBi, respectively.

  285. C-2-67 Relative bandwidth 158%, Ultra Broadband CMOS On-Chip Suspended Coupled Balun

    Takagi T., Nakayama E., Ta T. T., Kameda S., Suematsu N., Tsubouchi K.

    Proceedings of the IEICE General Conference　2012　(1)　108-108　2012/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

  286. C-2-15 Analysis on Base Band Waveform and ACLR in BP-DSM

    Maehata Takashi, Kameda Suguru, SUEMATSU Noriharu

    Proceedings of the IEICE General Conference　2012　(1)　56-56　2012/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

  287. C-12-72 A Si-CMOS Wideband 5-bit Baseband Phase Shifter using Fixed Gain Amplifier

    Ta T.T., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2012　(2)　144-144　2012/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

  288. 伝達関数の落ち込みを考慮した低BERチャネル選択手法

    小林和正, 富田俊輔, 三宅裕士, 小松和寛, 小熊博, 飯塚昇, 飯塚昇, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集　2012　411　2012/03/06

    ISSN： 1349-1369

  289. OFDMAシステムにおけるセル間及びセクタ間干渉

    小熊博, 亀田卓, 飯塚昇, 浅野安良, 山崎吉晴, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集　2012　134　2012/03/06

    ISSN： 1349-1369

  290. Beam Steering Experiments on a 60-GHz Band Dipole Array Antenna

    YOSHIDA Satoshi, SUZUKI Yuya, TANIFUJI Shoichi, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. Antennas and propagation　111　(429)　117-122　2012/02/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In this paper, we design and implement a 60-GHz band dipole array antenna with a beam for horizontal direction for a substrate. Several substrates are used to configure the array. The substrates are vertically stacked using 3-D SiP technology to form the beam. The proposed antenna structure is designed by numerical analysis and electromagnetic field analysis. Then the validity of the antenna structure is confirmed by beam steering experiments. As a result, 4x4 antenna configuration can realize the beamforming with 10 dBi gain and scan angle of 90° for both θ and φ direction.

  291. Hybrid Single-Carrier and Multi-Carrier System : Evaluation of Throughput with Inter-Cell Interference

    MIYAKE Yuji, KOBAYASHI Kazumasa, KOMATSU Kazuhiro, OGUMA Hiroshi, IZUKA Noboru, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    111　(417)　23-28　2012/01/19

    ISSN： 0913-5685

  292. Channel Selection for SC Transmission Considering Sinking Point of Channel Function

    KOBAYASHI Kazumasa, TOMITA Shunsuke, MIYAKE Yuji, KOMATSU Kazuhiro, OGUMA Hiroshi, IZUKA Noboru, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　111　(417)　17-22　2012/01/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In next generation mobile communication systems, single carrier (SC) system with low peak to average power ratio (PAPR) is adapted for uplink communications which need high power output for wide coverage. SC modulation with frequency domain equalization (FDE) make compensation for propagation path distortion. In SC-FDE system, channel function is estimated to compute equalization weight. We consider to use channel function for channel selection. The sinking point of channel function is useful to find low bit error ratio (BER) channel. In this paper, we evaluated BER performance with considering channel function with deep depression below the noise power. Since a depth of sinking point of channel function relates noise increment by Minimum Mean Square Error (MMSE) equalization, deep depression of channel function causes degradation on BER performance. By considering both average power and the sinking point of channel function, we can select a lower BER channel than considering only average power.

  293. ディペンダブルエア

    坪内 和夫, 亀田 卓, 末松 憲治

    信学論　J95-C　(12)　460-469　2012

  294. A study on system and link budget of location and short message communication using QZSS

    SUEMATSU Noriharu, KAMEDA Suguru, YAMAGATA Fumihiro, OGUMA Hiroshi, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. Microwaves　111　(351)　33-36　2011/12/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    The main mission of Quasi-Zenith Satellite System (QZSS) is high accurate positioning system. After the great east Japan earthquake on March 11, 2011, an additional mission of QZSS has been discussed and a location / short message satellite communication system is proposed which is effective for the large scale disaster relief. In this report, the outline of proposed location / short message communication system via QZSS is described and link budget of return link (from terminals on the earth to the QZSS) is discussed.

  295. A Study on Packet Structure and Maximum Capacity for Location and Short Message Communication System Using QZSS

    YAMAGATA Fumihiro, SUEMATSU Noriharu, KAMEDA Suguru, OGUMA Hiroshi, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. Microwaves　111　(351)　37-40　2011/12/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We proposed location and short message communication system for the people's safety in a disaster using Quasi-Zenith Satellite System (QZSS). We have evaluated positioning accuracy of the QZSS on a Global Positioning System (GPS) station. The measurement was proved that its accuracy was less than 5 meters and its standard deviation was less than 0.5 meter. We also proposed a packet structure of the location and short message communication system. The packet size was SOObits. The maximum user capacity per 1 hour was 1.2×10^7 users using the proposed packet structure.

  296. B-1-143 60-GHz Band Planar Dipole Array Antenna using 3-D SiP technology

    Yoshida S., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2011　(1)　143-143　2011/08/30

    Publisher: The Institute of Electronics, Information and Communication Engineers

  297. B-17-6 Quantization Error Influence of MMSE Based SC-FDE

    Kobayashi K., Miyake Y., Komatsu K., Tomita S., Tanifuji S., Kameda S., Suematsu N., Takagi N., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2011　(1)　538-538　2011/08/30

    Publisher: The Institute of Electronics, Information and Communication Engineers

  298. Investigation of Hybrid Single-Carrier and Multi-Carrier System: Evaluation of Throughput with Interference of Frequency Offset

    MIYAKE YUJI, KASHIWAMURA IKURO, KOBAYASHI KAZUMASA, TOMITA SHUNSUKE, KOMATSU KAZUHIRO, TANIFUJI SHOICHI, OGUMA HIROSHI, IIZUKA NOBORU, KAMEDA SUGURU, SUEMATSU NORIHARU, TAKAGI TADASHI, TSUBOUCHI KAZUO

    電子情報通信学会技術研究報告　111　(13(SR2011 1-17))　13-18　2011/04/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We have investigated hybrid single-carrier (SC) and multi-carrier (MC) system. MC transmission is effective for high data rate communication. SC transmission is effective for keeping a wide cover area. In this paper, uplink throughput of the proposed hybrid system was calculated using a computer simulation. An effective area of SC and MC is derived based on the evaluation of the throughput of SC and MC. Then optimum switching threshold between SC and MC is discussed. Hybrid SC/MC system achieved high throughput and wide coverage compared to SC-FDMA and OFDMA. We show that the throughput deterioration can be decreased by removing the first symbol of the block when there is an interference station has carrier frequency offset.

  299. A 60GHz High Gain LNA in 90nm CMOS

    GOMYO Katsunori, TA Tuan Thanh, TANIFUJI Shoichi, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　111　(3)　7-10　2011/04/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    This paper reported an integrated 60GHz band low-noise amplifier (LNA) implemented in a 90nm Si-CMOS process. To achieve higher and flat gain property, the designed LNA is constructed from 7 stages. At the first stage, the source inductor was optimized for the 50Ω matching and the optimization of NF. At the 2 to 6 stages, the source inductor was cut for the gain improvement. At the last stage, a little long source inductor was added for the stabilization. We fabricated and measured the proposed LNA chip. The total LNA die area with pads is 0.5mm×0.7mm. It has a peak gain of 23.5dB at 64GHz and minimum NF of 5.2dB at 57GHz. Power consumption is 21.2mW with 1.2V supply.

  300. Fabrication of 1GS/s Current Mode Pipeline ADC in 90nm CMOS

    ANDO Kei, NOZAWA Takashi, TA Tuan Thanh, TANIFUJI Shoichi, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　111　(3)　1-6　2011/04/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In heterogeneous wireless network, multimode tranceiver for various wireless system is needed. Analog-to-digital converter (ADC) in a receiver is one of the most important components. We fabricated 5bit 1GS/s current mode pipeline ADC with a power consumption of 45mW for WPAN (wireless personal area network). By DC measurement, the 5bit 1GS/s ADC has no miscode and increases monotonically without frequency characteristic. Differential non linearity (DNL) is less than 1, and integral non linearity (INL) is less than 1.25. By AC simulation with 11.17MHz input, the ADC achieved spurious free dynamic range (SFDR) of 44.6dB, signal to noise and distortion ratio (SNDR) of 27.2dB, and effective number of bits (ENOB) of 4.22bit. By AC measurement, the ADC achieved SFDR of 18.3dB, SNDR of 19.1dB, and ENOB of 2.88bit in 200MS/s.

  301. C-2-39 60GHz Band Series/Shunt Type High Power T/R Switch in 90nm Si-CMOS Process

    Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2011　(1)　77-77　2011/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  302. C-2-8 A 60GHz-Band High Efficiency Si-CMOS Push-Pull PA Using Optimized Transistor Size Method

    Gomyo K., Ando K., Ta T.T., Nakayama E., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2011　(1)　46-46　2011/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  303. C-2-30 A 60 GHz-band High Gain Low Noise Amplifier in 90nm CMOS

    Mizutani H., Taniguchi E., Shimozawa M., Hirano Y., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2011　(1)　68-68　2011/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  304. C-2-70 RF Characteristics Comparison of Side-Fill with Under-Fill for 60-GHz Band Flip-Chip IC Packaging

    Yoshida S., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2011　(1)　108-108　2011/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  305. C-12-46 1GS/s Current Mode Pipeline ADC in 90nm CMOS

    Ando K., Nozawa T., Ta T.T., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2011　(2)　118-118　2011/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  306. B-5-44 Hybrid Single-Carrier and Multi-Carrier System : Evaluation of Throughput with Interference

    Kobayashi K., Miyake Y., Kashiwamura I., Tomita S., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2011　(1)　430-430　2011/02/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

  307. Fabrication of a Millimeter-wave CMOS Cascode LNA with an Interstage Matching Inductor

    MIZUTANI Hiroyuki, TSURU Masaomi, TANIGUCHI Eiji, SHIMOZAWA Mitsuhiro, HIRANO Yoshihito, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　110　(447)　73-78　2011/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    This paper presents fabrication results of a 60 GHz-band low noise amplifier in 90mm CMOS. A cascode FET with an inductor connected in parallel to the connection node of cascoded FET was applied to the LNA in order for interstage matching of the cascoded FET and improving the gain of the LNA. The optimum inductance of the inductor was introduced analytically. The fabricated four stages cascoded low noise amplifier with inductor exhibits excellent results at 60 GHz that small signal gain of 25.6 dB, noise figure of 6.0 dB, OP1dB of -2.3 dBm, and power consumption of 26.9 mW.

  308. 1GS/s Current Mode Pipeline ADC in 90nm CMOS

    ANDO Kei, NOZAWA Takashi, TA Tuan Thanh, TANIFUJI Shoichi, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　110　(398)　89-94　2011/01/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In heterogeneous wireless network, multimode tranceiver for various wireless system is needed. We have already proposed a scalable analog-to-disital converter (ADC) which can change sampling frequency and resolution for wireless specification. For the proposed scalable ADC, time-interleaving technique and pipeline archtecture are adopted. To change sampling frequency, the proposed ADC switches a number of parallel. ADCs. To change resolution, the ADC switches a number of pipeline stages. The proposed ADC is designed in 90nm Si complementary metal oxide semiconductor (CMOS) with current mode constitution to reduce deterioration of conversion accuracy by microfabrication and to improve sampling speed. We fabricated 5bit 1GS/s current mode pipeline ADC for WPAN (wireless personal area network). By DC measurent, the 5bit 1GS/s ADC has no miscode and increases monotonically. By AC simulation with 11.17MHz input, the ADC achieved signal to noise ratio (SNR) of 27.3dB, spurious free dynamic range (SFDR) of 44.6dB, signal to noise and distortion ratio (SNDR) of 27.2dB, effective number of bits (ENOB) of 4.22bit, and power consumption of 45mW.

  309. Gain Enhancement of a Planar Dipole Antenna Integrated with a 60-GHz Band Small Module Using 3-Dimensional System-in-Package Technology

    YOSHIDA Satoshi, TANIFUJI Shoichi, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　110　(371)　141-146　2011/01/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We analyzed and implemented a 60-GHz band planar dipole antenna with extended dielectric substrate. As a result of parametric study of dielectric substrate length l, antenna gain increased with increment of l. Relative bandwidth of 12.9% and gain of 14.5 dBi at 58.3 GHz was measured for l=29.2[mm](5.84λ_0). Compared with l=1.2[mm](1.24λ_0), gain of 10dB was increased. We obtained fundamental data for design of a gain-controlled antenna for 60-GHz band 3-D system-in-package (SiP) modules.

  310. A High Efficiency Si-CMOS PA for 60GHz Broadband Communication Employing Optimized Transistor Size

    ANDO Kei, MATSUZAKI Keisuke, GOMYO Katsunori, TA Tuan Thanh, NAKAYAMA Eita, TANIFUJI Shoichi, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　110　(307)　81-86　2010/11/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    For small size and low cost mobile terminals on millimeter wave radio communication, we design and fabricate 60GHz-band broadband power amplifier (PA) using a 90nm Si-Complementary Metal Oxide Semiconductor (CMOS) process. To design high gain PA, transistor size optimization method of PA is used. Target output power is 7dBm in single-end and lOdBm in push-pull structure. With the method, unit gate width is 2μm and a number of gate fingers is 32, so total optimum gate width is 64μm. We fabricate the single-end PA and push-pull PA designed with the above size transistor. The single-end PA achieved P_<sat> of 10.2dBm, P_<1dB> of 7.3dBm, Gain of 10.9dB at 63GHz, peak PAE of 23.9% and a bandwidth over 7dBm of 8GHz. The push-pull PA achieved P_<sat> of 12.9dBm, P_<1dB> of 10.2dBm, Gain of 13.1dB at 63GHz, peak PAE of 25.4% and a bandwidth over 10dBm of 10GHz. These measured results shows the potentiality of high efficiency Si-CMOS PA for 60GHz-band broadband wireless communication applications.

  311. Quantization Error Influence of Frequency Domain Equalizer Based on MMSE

    TOMITA Shunsuke, MIYAKE Yuji, KOMATSU Kazuhiro, OGUMA Hiroshi, IZUKA Noboru, TANIFUJI Shouichi, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　110　(252)　7-12　2010/10/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In next generation mobile communication systems, Single-Carrier (SC) transmission using frequency domain equalizer (FDE) is an important technique. Since FDE needs fast Fourier transmissions (FFT) and divisions circuits, circuit size of FDE becomes large. For reducing size of FDE circuit, cutting quantization bits is necessary. But, shortage of quantization bits makes degradation of bit error rate (BER) performance because of quantization error. In this paper, FDE circuit is designed with considering trade off between size reduction effect of quantization bits and degradation of BER perform...

  312. C-2-10 Small Size 30 GHz Band VCO Using CCPW Line

    Ta T.T., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2010　(1)　46-46　2010/08/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

  313. C-2-2 Broadband CMOS On-Chip Suspended-Coupled Balun for 20-60GHz

    Gomyo K., Matsuzaki K., Yoshida S., Tanifuji S., Kameda S., Suematsu N., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　2010　(1)　38-38　2010/08/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

  314. 仙台地域におけるモバイルブロードバンド実証実験(17)―帯域20MHz条件下のDownlinkにおける64QAMのカバレッジ推定―

    小熊博, 亀田卓, 飯塚昇, 浅野安良, 山崎吉晴, 谷藤正一, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集　2010　404　2010/08/31

    ISSN： 1349-1369

  315. 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)　439-439　2010/08/31

    Publisher: The Institute of Electronics, Information and Communication Engineers

  316. Si CMOS RF Frontend for Dependable Wireless System

    KAMEDA Suguru, THANH TA Tuan, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　110　(153)　125-132　2010/07/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We are developing Dependable Wireless System(DWS)for realizing high-mobility and ultra high-data-rate mobile terminal using heterogeneous wireless systems. The DWS has optimum control functions of communication area, data rate, power consumption and quality of service(QoS). As one of the elemental technology to realize the DWS, implementation of radio frequency(RF)frontend using silicon complementary metal oxide semiconductor(Si CMOS)is necessary. In this paper, we developed and evaluated a low phase noise 5 GHz-band Si CMOS voltage controlled oscillator(VCO). To achieve low phase noise, a novel varactors pair circuit is proposed to cancel effects of capacitance fluctuation that makes harmonic currents which increase phase noise of VCO. The proposed VCO is designed with 0.18μm Si CMOS process. The fabricated VCO with the proposed varactor circuit has tuning range from 5.1 GHz to 6.1 GHz(relative value of 17.9%)and phase noise of lower than -110.8 dBc/Hz at 1 MHz offset over the full tuning range. Figure of merit with tuning range(FOMT)of the proposed VCO is -182 dBc/Hz.

  317. Influence of Hand Tremor for 60GHz-Band Broadband Wireless Communication Terminal

    TOMITA Shunsuke, TRAN Ngoc Hao, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　110　(153)　75-80　2010/07/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We are aiming to realize 60GHz-band wireless communication terminals with transmission rate 2 Gbit/s. In this paper, we evaluated influence of hand tremor at 60GHz-band communication systems using measurement and computer simulation. Terminals were assumed to receive direct wave and delay waves which reflected by wall and furniture. Measurements of relative amplitude with 2 path environment were well matched to simulation results. We also evaluated bit error rate(BER)in the case of hand tremor condition. From these results, in multipath environment, hand tremor caused serious fading at intervals of a few milliseconds.

  318. Measurement and Evaluation of Indoor Propagation Environment for 60GHz-Band Broadband Wireless Communication

    MIYAKE Yuji, TRAN HAO NGOC, KAMEDA Suguru, SUEMATSU Noriharu, TAKAGI Tadashi, TSUBOUCHI Kazuo, ADACHI Fumiyuki

    IEICE technical report　110　(153)　69-74　2010/07/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    One method to enable over 2Gbit/s data transmission rate is a broadband wireless system using 60GHz band. For realizing broadband wireless system over 2Gbit/s, we evaluated high-accuracy 60GHz-band indoor multipath characteristic using broadband signal with bandwidth of 2GHz. To equalize the frequency characteristics of measurement system, frequency domain equalization(FDE)was used. Using FDE, 3dB bandwidth of measurement system was expanded from 500MHz to 2GHz. As a result of evaluating the indoor propagation characteristic, the delay paths of the relative magnitude of -10dB to the direct path were observed. In addition, the measurement result was corresponding with the result of the multipath estimation by using the ray tracing method.

  319. C-2-7 A Low Noise Ku-band PLL-IC using Parallel PFD with Multiple Timing Operation

    Tsutsumi Koji, Takahashi Yoshinori, Shimozawa Mitsuhiro, Komaki Masahiko, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2010　(1)　50-50　2010/03/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

  320. CS-2-4 A Si RF Front-End Circuits and An Architecture of Receiver

    Taniguchi E., Shimozawa M., Suematsu N., Hirano Y., Kameda S., Takagi T., Tsubouchi K.

    Proceedings of the IEICE General Conference　2010　(1)　"S-52"-"S-53"　2010/03/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

  321. A Low Noise Ku-band PLL-IC using Parallel PFD with Multiple Timing Operation

    TSUTSUMI Koji, TAKAHASHI Yoshinori, SHIMOZAWA Mitsuhiro, KOMAKI Masahiko, SUEMATSU Noriharu

    IEICE technical report　109　(431)　179-182　2010/02/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A Parallel PFD configuration is effective for reducing the PLL phase noise. However, the phase noise reduction will degrade if the output noise of each PFD has some correlation. This paper proposes novel parallel PFD configuration with multiple timing operation. The proposed parallel PFD PLL-IC is fabricated in 0.18um SiGe BiCMOS process, and demonstrated in Ku-band, realizing higher effect of phase noise reduction compared to the conventional parallel PFD configuration.

  322. A 60GHz-Band CMOS Transistor-Pair Type Even-Harmonic Mixer Utilizing λ/4 Transmission Line

    TANIGUCHI Eiji, SHIMOZAWA Mitsuhiro, SUEMATSU Noriharu, HIRANO Yoshihito, KAMEDA Suguru, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report　109　(342)　53-57　2009/12/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Recently, a RF front-end IC utilizing Si technology is focused for millimeter-wave applications such as a 60GHz-band wireless PAN and a 77GHz-band radar system. An even-harmonic mixer which operates at 1/2 LO frequency is an effective configuration for a receiver in millimeter-wave applications. The even-harmonic passive mixer using an anti-parallel diode pair or active mixer using transistors have been developed. In this paper, a high linearity CMOS transistor-pair type even harmonic mixer utilizing λ/4 transmission line is described. The mixer was evaluated by using 90nm CMOS technology and performed good performances at 60GHz-band.

  323. C-12-23 High Speed, High Dynamic Range, Pulse Peak Detector IC for 3D Imaging LADAR

    Hirai A., Onoma F., Tsutsumi K., Suematsu N., Shimozawa M.

    Proceedings of the Society Conference of IEICE　2009　(2)　98-98　2009/09/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  324. C-2-36 5GHz CMOS Linear Driver Amplifier Using Base Current Control Circuit with Input Power Detection

    Shinjo Shintaro, Ueda Hiroomi, Suematsu Noriharu, Shimozawa Mitsuhiro

    Proceedings of the Society Conference of IEICE　2009　(1)　64-64　2009/09/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

  325. A-5-23 A Low Noise Analog LSI for Power Line Communication

    Tsutsumi Koji, Shimozawa Mitsuhiro, Suematsu Noriharu, Nakano Shinichi, Saitoh Seiichi

    Proceedings of the IEICE General Conference　2009　162-162　2009/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  326. C-2-26 5GHz-Band CMOS Power Amplifier Using Current Feedback Circuit with Output Power Detection

    Ueda Hiro-omi, Shinjo Shintaro, Mori Kazutomi, Shimozawa Mitsuhiro, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2009　(1)　65-65　2009/03/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

  327. 5GHz-Band CMOS Power Amplifier Using Current Feedback Circuit with Output Power Detection

    UEDA Hiro-omi, SHINJO Shintaro, MORI Kazutomi, SHIMOZAWA Mitsuhiro, SUEMATSU Noriharu

    IEICE technical report　108　(452)　91-95　2009/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We propose the power amplifier using current feedback circuit with output power detection. This amplifier has the current feedback circuit for output power detection in the cascade FET. In this configuration, the gain becomes higher by the increase of the drain-source voltage in the common-source FET with the currents, therefore higher P1dB can be obtained. The fabricated amplifier using 0.13μm CMOS shows the 3dB higher P1dB of 15.5dBm than the conventional one at 5GHz-band.

  328. A 2GHz-Band Self Frequency Dividing Quadrature Mixer Using Current Re-use Configuration

    TANIGUCHI Eiji, SHIMOZAWA Mitsuhiro, SUEMATSU Noriharu

    IEICE technical report　108　(452)　85-89　2009/02/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    For recent wireless and mobile applications, a direct conversion and a low IF architectures are widely used in a RF-IC receiver utilizing SiGe-BiCMOS and CMOS process technology since the characteristics of miniaturization and low power consumption can be obtained. In those architectures, a quadrature mixer is one of the key devices because of its performances, such as amplitude and phase balances, are concerned with demodulation characteristic directly. In this paper, a self frequency dividing quadrature mixer using current re-use is proposed. It employs a static-type flip-flop frequency divider as LO switching circuit and can achieve miniaturization and low power consumption of RF-IC.

  329. C-2-18 A 60 GHz-Band CMOS Transistor-Pair Type Even Harmonic Mixer Utilizing λ/4 Transmission Line

    Taniguchi E., Shimozawa M., Suematsu N., Hirano Y., Kameda S., Takagi T., Tsubouchi K.

    Proceedings of the Society Conference of IEICE　46-46　2009

    Publisher: The Institute of Electronics, Information and Communication Engineers

  330. C-2-1 A wideband Frequency Hopping (FH)-FM modulator using DDS and IRM

    Shimozawa Mitsuhiro, Tsutsumi Koji, Tadokoro Tomohiro, Ueda Hiroomi, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2008　(1)　26-26　2008/09/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

  331. CS-2-7 ASK and Pi/4-QPSK Dual Mode SiGe-MMIC Transceiver for 5.8GHz DSRC Terminals having Stabilized Amplifier Chain

    Shinjo S., Tsutsumi K., Mori K., Okada H., Inoue M., Suematsu N.

    Proceedings of the Society Conference of IEICE　2008　(1)　"S-69"　2008/09/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

  332. CS-2-9 A Low noise Ku-band PLL using SiGe HBT ECL Phase Frequency Detector

    Tsutsumi Koji, Komaki Masahiko, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2008　(1)　"S-71"　2008/09/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

  333. ASK and Pi/4-QPSK Dual Mode SiGe-MMIC Transceiver for 5.8GHz DSRC Terminals having Stabilized Amplifier Chain

    SHINJO SHINTARO, TSUTSUMI Koji, MORI Kazutomi, OKADA Hiroshi, INOUE Masahiro, SUEMATSU Noriharu

    IEICE technical report　108　(154)　157-162　2008/07/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A high integrated SiGe-MMIC transceiver having voltage controlled oscillator (VCO), phase locked loop (PLL), dual-transmit block for amplitude shift keying (ASK) mode and pi/4-quadrature phase shift keying (QPSK) mode, and common receiver block for the dual modes is developed for 5.8GHz dedicated short range communications (DSRC) terminals. To obtain stability of transceiver using differential configuration, which has on-chip closed loops generated by common ground/Vcc pad arrangement and differential pairs, the stabilized MMIC design method based on the loop analysis is introduced to it. In the loop analysis, the both on-chip loops of differential mode and common modes are considered, maximum loop gain of less than -3dB all over the frequency range is defined as the absolute stabilized condition. The simulated results for each loops show that isolation resistors inserted in bias feed line are effective for improving the stability. The effectiveness of the design method is evaluated by the measured results.

  334. 0.4GHz-5.8GHz Multi-band Multi-Mode SiGe-MMIC Transceiver for Cognitive Radio

    SUEMATSU Noriharu, TSUTSUMI Koji, HARADA Hiroshi

    IEICE technical report　107　(519)　1-5　2008/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A SiGe-MMIC transceiver has been developed for cognitive radio. This MMIC transceiver has multi-band characterictic which covers the whole band of 0.4-5.8GHz band and it also has multi-mode characterictic which handles various modulation schemes with different base-base frequency ranges. This MMIC includes a transmitter, a receiver and an LO switch blocks and it needs external RF oscilators as LO. The transmitter block consists of a direct conversion Q-MOD, VGAs and driver amplifiers having broad-bandcharacterictics and it provides a constant output power of transmit signal over 0.4-5.8GHz. The receiver block consists of a VGA, a direct conversion Q-MIX, base-band VGAs and a tunable active filter. The LO switch block consists of a switch matrix and frequency dividers, one each for transmitter and receiver to elminates the spurious emission from transmitter's output having receiving signal's frequency component. This MMIC can handle the modulated signal's band width of more than 50MHz and is applicable not only existing wireless systems but future broad-band systems including 4G.

  335. High Linearity SiGe-MMIC Quadrature Modulator Having Self Current Control Circuit with Output Power Detector for 0.4-5.8GHz Cognitive Radio Transceiver

    SHINJO Shintaro, TSUTSUMI Koji, ONOMA Fumiki, SUEMATSU Noriharu, HARADA Hiroshi

    IEICE technical report　107　(519)　7-13　2008/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A 0.4-5.8GHz high linearity SiGe-MMIC quadrature modulator (Q-MOD) having a novel self mixer current control circuit is described. This control circuit, which consists of an output power detector and an envelope current feedback circuit, is applied to unit mixers, and it automatically controls the mixer current according to the output power level. As a result, high linearity can be obtained. In simulation, the proposed Q-MOD shows the P_<1dB> improvement of more than 2.6dB under the CW condition of the 0.4-5.8GHz frequency range compared with the conventional Q-MOD. In measurement, the Q-MOD achieves P_<1dB> improvement of more than 3.0dB under the same condition. It also improves the output power with EVM of 3.0% for both modulation conditions of UHF wireless systems (16QAM/OFDM, 0.4GHz) and IEEE802.11a W-LAN (64QAM-OFDM, 5.2GHz).

  336. C-2-8 A 3-4GHz-band SiGe-MMIC Transceiver for wide-band signal

    Ueda H., Shimozawa M., Suematsu N.

    Proceedings of the IEICE General Conference　2008　(1)　41-41　2008/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  337. C-2-7 A Low Spurious SiGe-MMIC Direct Conversion Transceiver Using 2f_<LO> LO Switching Configuration for Cognitive Radio

    Tsutsumi Koji, Onoma Fumiki, Koide Jun, Uesugi Mikio, Suematsu Noriharu, Harada Hiroshi

    Proceedings of the IEICE General Conference　2008　(1)　40-40　2008/03/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  338. 出力バッファ電流帰還形0.4-5.8GHz帯低ひずみSiGe-MMIC直交変調器

    新庄真太郎, 堤 恒次, 小野間史樹, 末松憲治, 原田博司

    電子情報通信学会 総合大会　C-2-6　2008/03

  339. コグニティブ無線用電流補償形低ひずみSiGe-MMIC直交ミクサ

    末松憲治, 小野間史樹, 堤 恒次, 小出 純, 上杉美喜夫, 原田博司

    電子情報通信学会 総合大会　C-2-5　2008/03

  340. An Even Harmonic Image Rejection Mixer using an Eight-Phase Polyphase Filter

    SHIMOZAWA Mitsuhiro, NAKAJIMA Kensuke, TADOKORO Tomohiro, UEDA Hiroomi, SUEMATSU Noriharu

    IEICE technical report　107　(504)　79-83　2008/02/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    An even harmonic mixer is pumped by LO with half the frequency compared with the fundamental mixer, LO can be generated and amplified easily with less current consumption. However, it requires a 90 degree phase shifter in the RF signal path or a 45 degree phase shifter in the LO path when it is applied to the quadrature mixer (QMIX) or the image rejection mixer (IRM). As a 90 degree phase shifter for RF path increases loss of the RF signal and degrades noise figure of the receiver, a configuration with a 45 degree phase shifter is better for QMIX or IRM. In this paper, we present an even harmonic IRM with an eight-phase polyphase filter. An eight-phase polyphas filter is an expansion of the conventional polyphase filter for 90 degree phase shifter, and it can divide the input differential LO wave into the four differential LO wave with 45 degree phase difference. A developed even harmonic IRM with an eight-phase polyphase filter fabricated by SiGe BiCMOS process achieved more than 20dB of the image rejection ratio in 5.8GHz-band.

  341. 0.4-5.2 GHz SiGe-MMIC direct conversion mixer for cognitive radio receiver

    SUEMATSU N.

    2007 IEEE Radio and Wireless Symposium, Digest, Jan.　435-438　2008

  342. 5GHz SiGe HBT Linear Driver Amplifier using Base Current Control Circuit with Input Power Detection

    SHINJO Shintaro, ONOMA Fumiki, MORI Kazutomi, SUEMATSU Noriharu

    IEICE technical report　107　(394)　35-40　2007/12/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A 5GHz SiGe HBT linear driver amplifier using a base current control circuit with input power detection is described. The control circuit consists of a power detection block and a bias control block. The detected current is increased according to the input power level in the power detection block, and the added detected current is provided to the bias circuit in the bias control block. As a result, the base voltage is also increased, and high linearity can be realized. The fabricated proposed driver amplifier achieved the P_<1dB> improvement of 2.6dB compared to the conventional driver amplifier.

  343. SiGe-MMIC transceiver for ETC terminals

    81　(9)　621-624　2007/09

    Publisher: 三菱電機エンジニアリング

    ISSN： 0369-2302

  344. 出力検波電流帰還形0.4GHz-5.8GHz帯SiGe-MMIC線形直交変調器

    小野間史樹, 堤 恒次, 新庄真太郎, 小出 純, 上杉美喜夫, 末松憲治, 原田博司

    電子情報通信学会 ソサエティ大会　C-2-25　2007/09

  345. コグニティブ無線用0.4GHz-5.8GHz帯マルチバンド SiGe-MMIC送受信ダイレクトコンバータ

    堤 恒次, 小野間史樹, 小出 純, 上杉美喜夫, 末松憲治, 原田博司

    電子情報通信学会 ソサエティ大会　C-2-24　2007/09

  346. C-2-16 5GHz SiGe HBT Linear Driver Amplifier Using Base Current Control Circuit with Input Power Detection

    Shinjo Shintaro, Onoma Fumiki, Mori Kazutomi, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2007　(1)　38-38　2007/08/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

  347. 324Mbps伝送用5GHz帯送受信SiGe-MMIC

    上田博民, 中島健介, 金沢学志, 下沢充弘, 小出純, 上杉美喜夫, 武内良祐, 末松憲治, 礒田陽次, 亀田卓, 中瀬博之, 高木直, 坪内和夫

    電子情報通信学会大会講演論文集　2007　2007

    ISSN： 1349-1369

  348. 0.4-5.2 GHz SiGe-MMIC direct conversion mixer for cognitive radio receiver

    SUEMATSU N.

    2007 IEEE Radio and Wireless Symp., Jan.　435-438　2007

  349. 5GHz-Band CMOS double stacked cascode variable gain driver amplifier by switching common-source FET

    UEDA Hiro-omi, MORI Kazutomi, SHIMOZAWA Mitsuhiro, YAGASAKI Tomoumi, YAHAGI Koichi, SUEMATSU Noriharu

    2006　(95)　13-16　2006/11/22

  350. 5.8GHz ETC SiGe-MMIC Transceiver having Improved PA-VCO Isolation

    SHINJO Shintaro, TSUTSUMI Koji, NAKAJIMA Kensuke, UEDA Hiroomi, MORI Kazutomi, HIEDA Morishige, INOUE Masahiro, SUEMATSU Noriharu

    IEICE technical report　106　(369)　5-10　2006/11/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A fully integrated SiGe-MMIC transceiver having a power amplifier (PA), a transmit/receive switch, and a voltage controlled oscillator (VCO) is developed for electric toll collection (ETC) system terminals. To improve the isolation between the PA and the VCO, the back-polish technique of the silicon substrate (127μm thickness) is employed. Electro-magnetic simulation shows that a MMIC of 127μm thickness achieves the isolation improvement of 12.3dB compared with that of conventional 300μm thickness. As a result, the USB/LSB unbalance of the transmitted amplitude shift keying signal can be reduced from 4.2dB to 1.2dB at 13dBm output power. The MMIC transceiver fabricated in 0.35mm SiGe BiCMOS process achieves the maximum output power of 15.5dBm with the adjacent channel power ratio of -33.5dBc.

  351. A Double Tuned Ku-Band SiGe-MMIC VCO with Variable Feed-Back Capacitor

    TSUTSUMI Koji, KAGANO Miki, SUEMATSU Noriharu

    IEICE technical report　106　(369)　11-15　2006/11/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A double tuned Ku-Band SiGe-MMIC voltage-controlled oscillator (VCO) with variable feed-back capacitor is presented. The proposed VCO employs series varactors in feed-back paths in addition to varactors in tank circuit. By controlling both varactors, this VCO achieves wide tuning range compared to the conventional LC cross-coupled VCO. Furthermore, appropriately biased MOS varactors for feed-back paths realize linear tuning performance. The proposed configuration is experimentally validated with a 0.35μm SiGe-BiCMOS fully integrated VCO. The oscillation frequency of the fabricated VCO varies 14.3GHz to 16.2GHz with 12.5% tuning range, which is increased by 120% from that of the conventional LC cross-coupled VCO.

  352. 5GHz-Band CMOS double stacked cascode variable gain driver amplifier by switching common-source FET

    UEDA Hiro-omi, MORI Kazutomi, SHIMOZAWA Mitsuhiro, YAGASAKI Tomoumi, YAHAGI Koichi, SUEMATSU Noriharu

    IEICE technical report　106　(369)　63-66　2006/11/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We propose the CMOS double stacked cascode variable gain driver amplifier by switching common-source FET. This amplifier has the variable gate-width common-source FET that is cascaded by the common-gate FET. In this configuration, the constant input and output impedance characteristics are available, and the input distortion characteristic is also constant in any gain mode. Additionally, the low power consumption is obtained in the low gain mode. The fabricated variable gain amplifier using 0.13μm CMOS obtains such characteristics as shown in above at 5GHz-band.

  353. C-2-3 5GHz-Band CMOS double stacked cascode variable gam driver amplifier by switching common-source FET

    Ueda Hiro-omi, Mori Kazutomi, Yagasaki Tomoumi, Yahagi Koichi, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2006　(1)　22-22　2006/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  354. C-2-18 Temperature Characteristics of SiGe HBT Transmitter Amplifier with Divided Resistor Type Current Mirror Bias Circuit

    Onoma F., Shinjo S., Mori K., Inoue M., Suematsu N.

    Proceedings of the Society Conference of IEICE　2006　(1)　37-37　2006/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  355. C-12-13 A Gate Feedback type Low Distortion CMOS FET SP3T Switch

    Tsutsumi Koji, Shimozawa Mitsuhiro, Suematsu Noriharu

    Proceedings of the Society Conference of IEICE　2006　(2)　74-74　2006/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  356. Broad-Band RF Devices and Their Application to SDR Terminals

    SUEMATSU Noriharu, TSUTSUMI Koji, SHINJO Shintaro

    IEICE technical report　106　(188)　3-6　2006/07/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Multi-band/multi-mode transceivers based on software defined radio (SDR) technology need combined configuration of broad-band and tunable RF devices. RF blocks which should be made by broad-band RF devices are up/down converters (including analog MOD/DEMOD.) In this report, these examples are introduced with actual RF block diagram and circuitry.

  357. Suppression of Unbalanced performances in Multi-Stage Grounded C-E Differential Amplifier

    SHINJO Shintaro, UEDA Hiroomi, MORI Kazutomi, HIEDA Morishige, INOUE Masahiro, SUEMATSU Noriharu

    IEICE technical report　106　(129)　17-22　2006/06/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Gain and saturation characteristics under the differential input signal unbalance are investigated for multi-stage grounded common-emitter (C-E) differential amplifier. The simulated results show that these characteristics are more degraded when the unbalance of input signal is large, and the degradations of the inductor feed PA are increased more than that of the resistor feed PA. The fabricated five-stage grounded C-E differential PA with the resistor feed achieves the gain of 29.8dBand OP_<1dB> of 14.8dBm at 5.8GHz.

  358. C-2-22 Direct Conversion Receiver Characteristics of 0.8-5.2GHz Multi-Band/Muti-Mode SiGe-MMIC Q-Mixer

    Kanazawa Gakushi, Murakami Keishi, Kageyama Chiemi, Nakajima Kensuke, Tsutsumi Kouji, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2006　(1)　53-53　2006/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  359. C-2-2 A Double Tuned Ku-Band SiGe-MMIC VCO with Variable Feed-Back Capacitor

    Tsutsumi Koji, Kagano Miki, Suematsu Noriharu

    Proceedings of the IEICE General Conference　2006　(1)　33-33　2006/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  360. CBS-1-6 UHF Band RF Circuits for RFID Tag with Battery Supply

    MORI Kazutomi, KATAYAMA Akiko, TSUTSUMI Koji, NISHIKAWA Koji, KURITA Akira, KAMEMARU Toshihisa, SUEMATSU Noriharu

    Proceedings of the IEICE General Conference　2006　(1)　"S-11"　2006/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  361. 2-46GHz Band m-HEMT MMIC Traveling Wave Amplifier

    UEDA Hiro-omi, MORI Kazutomi, SUEMATSU Noriharu

    IEICE technical report　105　(626)　19-22　2006/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We developed traveling wave amplifiers using metamorphic High Electron Mobility Transistor (m-HEMT). The fabricated amplifiers with cascode configured-nine unit cells show that the stability and the bandwidth enhancement of amplifiers are obtained by setting the capacitance in several hundred of farads and the resistance in several tens of ohms. The amplifier achieves a gain of 11dB, a bandwidth of 46GHz, a group delay of 90s, and P1dB of 17.5dBm.

  362. Interference between PA and VCO in Si System Chip

    TSUTSUMI Koji, SHINJO Shintaro, MORI Kazutomi, SUEMATSU Noriharu

    IEICE technical report　105　(626)　23-27　2006/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    This paper presents analysis of amplitude modulation interference between PA and VCO in Si System Chip. Modeling of the interference path between PA and VCO is performed using the measured result of Si Chip including PA and VCO. Relation of output spectrum degradation to output power is derived from this model, and compared with measured results. Furthermore, to improve the isolation between the PA and the VCO, the back-polish technique of the silicon substrate is proposed. Electro-magnetic simulation and measurement show that this technique is effective to improve the isolation.

  363. Recent Technical Trend of Microwave Circuits for SDR Terminals

    SUEMATSU Noriharu

    IEICE technical report　105　(430)　31-33　2005/11/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In order to realize multi-band / multi-mode transmitters based on software defined radio (SDR) technology, a combined configuration of broad-band and tunable microwave devices should be employed. In this paper, this combined configuration and the technical problems of each circuit blocks are discussed by referring with recent developments. The broad-band microwave devices have been developed for the Tx/Rx direct converters. The tunable devices based on MEMS technology have been focused for filters and power amplifiers and some attempts began to be reported.

  364. Gain Characteristic Variation by Input Power Unbalance for Multi-Stage Differential Amplifiers

    SHINJO Shintaro, UEDA Hiroomi, MORI Kazutomi, HIEDA Morishige, INOUE Masahiro, SUEMATSU Noriharu

    IEICE technical report　105　(368)　59-63　2005/10/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Gain characteristic variation by input power unbalance is investigated for emitter grounded type differential amplifier. It is shown by simulated and measured results that a differential amplifier having a resistor feed is superior to that having an inductor feed in terms of gain characteristic. The fabricated five-stage differential amplifier having resistor feed achieves the linear gain of 29.8dB and the P_<1dB> of 14.8dBm.

  365. 5GHz-Band SiGe-MMIC Direct Quadrature Modulator using a Circular Polyphase Filter for 1Gbps Transmission

    NAKAJIMA Kensuke, SUEMATSU Noriharu, MURAKAMI Keishi, ISOTA Yoji, NAKASE Hiroyuki, TAKAGI Tadashi, TSUBOUCHI Kazuo

    IEICE technical report. Microwaves　105　(272)　25-29　2005/09/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A 5GHz-band SiGe-MMIC direct conversion quadrature modulator using a circular polyphase filter for high data rate is described. High I/Q vector accuracy is achieved by using a circular polyphase filter with a completely symmetric layout as a 90 degrees LO power divider. By combining high cut-off frequency baseband amplifiers and broad-band unit mixers, a fabricated quadrature modulator shows the EVM of 3.3%rms at 5.5GHz using 64-QAM OFDM signals with the channel bandwidth of 204MHz, which correspondes to the data rate of 1.161Gbps.

  366. C-2-30 0.8-5.2GHz SiGe-MMIC Q-MOD for wide-band direct conversion transmitters

    Suematsu Noriharu, Kageyama Chiemi, Nakajima Kensuke, Tsutsumi Kouji, Taniguchi Eiji, Murakami Keishi

    Proceedings of the Society Conference of IEICE　2005　(1)　51-51　2005/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  367. 0.8-5.2GHz Multi-Band Multi-Mode Direct Conversion SiGe-MMIC Q-MOD

    KAGEYAMA Chiemi, NAKAJIMA Kensuke, TSUTSUMI Kouji, TANIGUCHI Eiji, SUEMATSU Noriharu, MURAKAMI Keishi

    SR　105　(217)　105-108　2005/07/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In order to realize multi-band multi-mode transmitters for the 4^<th> generation mobile communication systems based on SDR technology, 0.8-5.2GHz broad-band direct conversion Q-MOD has been fabricated in 0.35um SiGeBiCMOS process. Combination of a static frequency divider and a PPF enable higher 90degree phase acuracy than that of the static frequency divider alone. By employing this 90 degree power divider, the Q-MOD achieves appricable modulation performances for both W-CDMA(0.8/2.1GHz) and Wireless-LAN(2.45/5.2GHz) systems.

  368. Direct Conversion Receiver Characteristics of 0.8-5.2GHz Multi-Band Multi-Mode SiGe-MMIC Q-Mixer

    KAGEYAMA Chiemi, NAKAJIMA Kensuke, TSUTSUMI Kouji, TANIGUCHI Eiji, SEKINE Tomotsugu, SUEMATSU Noriharu

    IEICE technical report. Microwaves　105　(151)　5-8　2005/06/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    To realize the 4^<th> generation mobile communication systems with SDR technology, multi-band multi-mode transceivers are required. For these transceivers, 0.8-5.2GHz broad-band Q-MIX for direct conversion receiver has been fabricated by using 0.35um SiGe BiCMOS process. By adopting a high speed frequency divider as 90 degrees power divider, multi-band (0.8-5.2G) multi-mode (W-CDMA/W-LAN(IEEE802.11a)) direct conversion reception characteristics can be obtained.

  369. Broad-Band SiGe-BiCMOS MMIC for Multi-Band/Multi-Mode Wireless Communication Terminals

    SUEMATSU Noriharu, KAGEYAMA Chiemi, NAKAJIMA Kensuke

    IEICE technical report　105　(36)　67-71　2005/05/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    For several hundreds MHz-6 GHz-band multi-band/multi-mode wireless terminals, broad-band and/or tunable RF transceiver section should be developed. In this report, direct conversion type Q-MOD and Q-MIX, suitable for multi-mode/multi-band applications, are introduced. A boroad-band variable pahse shifter and a variable degital attenuator are also introduced.

  370. C-2-46 A 5GHz-Band SiGe-MMIC Direct Quadrature Modulator Using Circular Polyphase Filter

    Nakajima K., Suematsu N., Nakase H., Isota Y., Tsubouchi K.

    Proceedings of the IEICE General Conference　2005　(1)　79-79　2005/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  371. C-2-50 A2 GHz-Band Self Frequency Dividing Quadrature Mixer

    Taniguchi E., Kageyama C., Suematsu N.

    Proceedings of the IEICE General Conference　2005　(1)　83-83　2005/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  372. A 5GHz-Band SiGe-MMIC Quadrature Modulator Using a Circular Polyphase Filter for 1Gbps Transmission

    K. Nakajima, N. Suematsu, K. Murakami, T. Takagi, H. Nakase, Y. Isota, K. Tsubouchi

    35th European Microwave Conference (EuMW2005)　979-982　2005

    DOI： 10.1109/EUMC.2005.1610092 　

  373. Variable Feed-Back Capacitor Type 2.9GHz-Band SiGe-MMIC VCO

    TSUTSUMI Koji, NAKAJIMA Kensuke, SUEMATSU Noriharu

    IEICE technical report. Microwaves　104　(536)　45-49　2004/12/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Variable Feed-Back Capacitor Type 2.9GHz-Band SiGe-MMIC voltage controlled oscillator (VCO) is presented. The proposed VCO employs series MOS varactors in feedback paths, in order to achieve wide tuning range and linear tuning performance compared to the conventional VCO. The circuit has been fabricated using a 0.35[im SiGe-BiCMOS process. The oscillation frequency of the VCO varies with 21% tuning range, which is increased by 30% from that of the conventional VCO.

  374. A 5GHz-Band SiGe-MMIC Direct Quadrature Modulator Using a Doubly Stacked Polyphase Filter

    NAKAJIMA Kensuke, SUGANO Takayuki, SUEMATSU Noriharu

    IEICE technical report. Microwaves　104　(463)　13-17　2004/11/26

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A 5 GHz-band SiGe-MMIC direct quadrature modulator using a doubly stacked polyphase filter (PPF) is described. The doubly stacked PPF can dramatically reduce the output phase and magnitude error corresponding to the imbalanced transmission line length inside of the RC PPF networks. The quadrature modulator using two-stage doubly stacked PPF performs the phase error of less than 1.0 deg, magnitude error of less than 1.6 %rms, and error vector magnitude of less than 2.3 %rms over the wide frequency range of 4.1-6.0 GHz using π/4-shifted QPSK (192ksps) modulated signals. This modulator dissipates 13.9 mA at 3.3 V supply voltage.

  375. SiGe System IC's for Microwave Frequency Range Applications

    SUEMATSU Noriharu

    The Journal of the Institute of Electronics, Information and Communication Engineers　87　(11)　970-973　2004/11/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5693

  376. 0.8-5.2GHz Band SiGe-MMIC Q-Mixer for Multi-Band Multi-Mode Direct Converstion Receiver

    KAGEYAMA Chiemi, NAKAJIMA Kensuke, TSUTSUMI Koji, TANIGUCHI Eiji, SHIMOZAWA Mitsuhiro, SUEMATSU Noriharu

    IEICE technical report. Microwaves　104　(46)　91-95　2004/05/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    By employing a 14GHz static frequency divider and broad-band SiGe-HBT unit mixers, a 0.8-5.2GHz band Q-MIX is developed using 0.35 μm SiGeBiCMOS process. The fabricated Q-MIX has constant conversion gain (Gc) over the wide baseband (BB) frequency range upto 100MHz and performs good I/Q balanace (<0.17dB, <3.6 degrees) over the wide RF frequency range of 0.8-5.2GHz. EVM of 2.1%rms, magnitude error of 1.5%rms and phase error of 0.9 degrees rms are achieved for W-CDMA condition at O.8GHz.

  377. TBC-1-3 CONTROLLABLE RF CIRCUITS USING SEMICONDUCTOR DEVICES

    Suematsu Noriharu, Hieda Morishige

    Proceedings of the IEICE General Conference　2004　(1)　"SS-37"-"SS-38"　2004/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  378. A Low Loss/Phase Invariant Ku-Band 6-Bit MMIC Attenuator

    HIEDA Morishige, TANIGUCHI Eiji, NAKAJIMA Kensuke, KURUSU Hitoshi, SUEMATSU Noriharu, IYAMA Yoshitada, TAKAGI Tadashi

    The Transactions of the Institute of Electronics, Information and Communication Engineers C　87　(1)　61-70　2004/01/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 1345-2827

  379. L-Band 5-Bit Phase Shifter Multi-Chip Module

    NAKAJIMA Kensuke, SUEMATSU Noriharu, TAKEDA Hideji, SHINBO Toshiyuki, SASAKI Yoshinobu, TAKAGI Tadashi

    The Transactions of the Institute of Electronics, Information and Communication Engineers C　87　(1)　81-90　2004/01/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 1345-2827

  380. A 5GHz-Band On-Chip Matching CMOS MMIC Front-End

    UEDA Hiro-omi, SHINJO Shintaro, NABENO Yasuhiro, ONO Masayoshi, OHNAKADO Takahiro, MURAKAMI Takaaki, FURUKAWA Akihiko, HASHIZUME Yasushi, NISHIKAWA Kazuyasu, MORI Takeshi, YAMAKAWA Satoshi, OOMORI Tatsuo, SUEMATSU Noriharu

    IEICE technical report. Microwaves　103　(534)　59-62　2003/12/12

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A 5GHz-band CMOS MMIC front-end is developed, which includes a two-stage power amplifier (PA) with a single-stage push-pull driver (DRY), a three-stage low noise amplifier (LNA), and a transmit/receive (T/R) switch. The high current on-chip matching spiral inductor is used for the on-chip matching PA. On-chip matching configuration enables these circuits to connect internally. The 1C performs 14.8dBm transmit power, and 4.1dB receiver noise figure at 5.2GHz.

  381. A Ku-Band High Efficiency High Power Internal-Matched GaAs FET

    MORI K., OHTSUKA H., TSUJI S., KOASHI Y., SAKAI Y., SEINO K., SUEMATSU N., YAKAGI T.

    IEICE technical report. Microwaves　103　(534)　53-57　2003/12/12

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Ku-band high efficiency high power internal-matched FET has been developed by using the large signal FET model including the thermal model. In order to achieve high efficiency and high gain in addition to high power the optimum impedances at each temperature are obtained by using the extracted large signal FET model. In order to achieve high gain, 12 FET cells on a single chip are divided four parts of three FET cells and are matched respectively. The characteristic impedances of the input impedance transformer are optimized to achieve high gain in broadband. The developed Ku-band internal-matched FET achieves PldB of 41.8dBm(15W) and PAE of 37.5% at 14.2GHz and base temperture Tb of 40degC and also achieves PldB over 41.4dBm and PAE over 33.8% at Tb from -15 to lOOdegC.

  382. High P_<1dB> and Low Quiescent Current SiGe HBT Power Amplifier MMIC Using Self BaSe Bias Control Circuit for 5.8GHz ETC Terminals

    Shinjo Shintaro, Sugano Takayuki, Ueda Hiroomi, Mori Kazutomi, Nakanishi Masahiko, Inoue Masahiro, Suematsu Noriharu

    IEICE technical report. Electromagnetic compatibility　103　(369)　37-42　2003/10/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A 5.8GHz high P1dB and low quiescent SiGe HBT three-stage power amplifier (PA) MMIC using a self base bias control circuit is described. The self base bias control circuits are applied to the second and the final stage PA's, and automatically control the base current/voltage according to the output power level. As a result, high P1dB is obtained at a low quiescent current condition. The simulated results show that the proposed threestage PA MMIC achieves P1dB improvement of 1.7dB compared with a conventional PA using a constant base voltage bias circuit at the same quiescent current condition. The fabricated PA MMIC achieves P1dB of 15.3dBm, gain of 19.6dB with the quiescent current of 22.2mA at 5.8GHz.

  383. A 0.8dB insertion-loss, 17.4dBm power-handling, 5GHz transmit/receive CMOS switch

    Ohnakado T., Yamakawa S., Murakami T., Furukawa A., Taniguchi E., Ueda H., Suematsu N., Oomori T.

    Proceedings of the Society Conference of IEICE　2003　(1)　30-30　2003/09/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

  384. Ku-Band High Efficiency High Power Internal-Matched GaAs FET

    Mori K., Ohtsuka H., Tsuji S., Koashi Y., Sakai Y., Suematsu N., Yakagi T.

    Proceedings of the Society Conference of IEICE　2003　(1)　64-64　2003/09/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

  385. Down-Conversion Characteristics of 2.5GHz-Band SiGe HBT and CMOSFET Mixers in Low IF Frequency Region.

    KAGEYAMA Chiemi, TANIGUCHI Eiji, SUEMATSU Noriharu

    IEICE technical report. Microwaves　103　(288)　5-8　2003/09/04

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    For mobile terminals of the next generation wireless communication systems, multi-mode / multi-band RF devices are required to be applied to several wireless acess systems. A direct conversion or a low IF configuration has been focused as multi-mode / multi-band receiver, and studies of transceiver system 1C solution have been carried out using SiGe HBT and/or CMOS. In this paper, SiGe HBT and CMOS Rx unit Mixer are fabricated for these system IC solution. The measured results of down-conversion characteristics in low IF frequency region are described.

  386. An Even Harmonic Mixer Using Self-Biased Anti-Parallel Diode Pair

    SHIMOZAWA Mitsuhiro, KATSURA Takatoshi, MAEDA Kenichi, TANIGUCHI Eiji, IKUSHIMA Takayuki, SUEMATSU Noriharu, ITOH Kenji, ISOTA Yoji, TAKAGI Tadashi

    IEICE Trans. Electron., C　86　(8)　1464-1471　2003/08/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0916-8524

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    This paper presents an even harmonic mixer using self-biased anti-parallel diode pair (APDP). A proposed self-biased APDP is composed of a pair of diodes and self-bias series resistors. At high LO injection level, rectified current is generated by the diodes and reverse voltage is applied to the diodes by the self-bias resistor. Therefore, rapid degradation of conversion loss at high LO input level can be avoided. The effect of self-bias resistor is explained by using simplified behavior model and harmonic balance method, and is evaluated by the measurements of an L-band even harmonic type direct conversion mixer.

  387. A 2GHz-Band Even Harmonic Type Direct Conversion CECCTP Mixer having 2LO Canceller circuit

    TANIGUCHI Eiji, KAGEYAMA Chiemi, MAEDA Kenichi, TAKAHASHI Yoshinori, IKUSHIMA Takayuki, SUEMATSU Noriharu

    IEICE technical report. Microwaves　102　(524)　1-5　2002/12/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A direct conversion receiver is one of the effective down converter architectures for miniaturization of mobile terminals. High performances of mixer are required to realize a direct conversion receiver. In this paper, an active even harmonic type CECCTP(Common Emitter Common Collector Transistor Pair) mixer having 2LO canceller is discussed. The proposed CECCTP mixer fabricated in SiGe process have performed higher direct conversion characteristics compared with conventional CECCTP mixer.

  388. An L-band CV/CC Parallel Operation HBT Power Amplifier

    SHINJO Shintaro, MORI Kazutomi, UEDA Hiroomi, OHTA Akira, SEKI Hiroaki, SUEMATSU Noriharu

    IEICE technical report. Microwaves　102　(457)　25-30　2002/11/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A constant voltage / constant current (CV/CC) parallel operation HBT power amplifier configuration is presented. By combining inductor-base-feed (CV mode) HBT and resistor-base-feed (quasi CC mode) HBT, non-linearity at large back-off region can be cancelled out. Therefore both low quiescent current and enough adjacent channel leakage power ratio (ACPR) performance can be achieved. Moreover by tuning the size of each transistor size and the value of feed resistor, the efficiency at the high output power level is kept. The fabricated CV/CC parallel operation HBT power amplifier demonstrates extremely low quiescent current of 17mA, ACPR of less than -40dBc at the output power range up to 26.8dBm, and power-added efficiency of 42.2% with output power of 26.8dBm.

  389. An Even Harmonic Type Direct Conversion SiGe Front-End Module for W-CDMA Terminals

    Suematsu N., Itoh K., Shimozawa M., Taniguchi E., Nishino T., Ikushima T., Maeda K., Takagi T., Ishida O.

    Proceedings of the Society Conference of IEICE　2002　(1)　32-32　2002/08/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

  390. L-band SiGe-MMIC Vector Synthesis Type Analog Phase Shifter using Polyphase Filter

    NAKAJIMA Kensuke, FUNAKOSHI Akira, ITO Daisuke, KAGANO Miki, NAKANE Masafumi, SUEMATSU Noriharu

    IEICE technical report. Microwaves　102　(243)　23-26　2002/07/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    An L-band SiGe-MMIC vector synthesis type analog phase shifter using a polyphase filter is described. A polyphase filter can divide a differential signal into two differential equi-amplitude quadrature signals over the wideband. However, the insertion loss characteristics are varied depending on the load impedance. In this paper, to obtain wideband four equi-amplitude quadrature vectors through a polyphase filter, the interstage impedance between a polyphase filter and a variable gain amplifier are discussed. The fabricated analog phase shifter has achieved a phase shift r.m.s. error of 2.Odeg. r.m.s. and an amplitude r.m.s. error of 0.41dB r.m.s. for 32 phase states over 1.2-2.2GHz.

  391. Temperature Dependence Characteristic of the Self Base Bias Controlled SiGe HBT Driver Amplifier

    SHINJO Shintaro, MORI Kazutomi, JOBA Hiroyuki, SUEMATSU Noriharu

    IEICE technical report. Microwaves　102　(243)　1-6　2002/07/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    The temperature dependence characteristic of the self base bias controlled 5iGe HBT driver amplifier is described. The base voltage of the SiGe HBT driver amplifier is automatically controlled by the self base bias control circuit according to the output power level, and the SiGe HBT driver amplifier is allowed to be low distortion at high output power level. And the self base bias control circuit can compensate for temperature dependence as similarly as a constant base voltage circuit can. The simulated results show that the self base bias controlled 5iGe HBT driver amplifier achieves 1dB power compression point (P1dB) improvement of more than 2.3dB compared with the driver amplifier having the constant base voltage circuit over the temperature range of -20 to 85 Celsius. The measured results agree with the simulated results, and show high P1dB with low quiescent current.

  392. A 2GHz-Band Even Harmonic Type SiGe-MMIC Direct Conversion Mixer using CECCTP

    SAWAUMI Chiemi, MAEDA Kenichi, TANIGUCHI Eiji, SUEMATSU Noriharu

    IEICE technical report. Microwaves　101　(532)　37-42　2001/12/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    SiGe-MMIC and direct conversion receiver are key technologies to realize receiver system on chip for mobile communication terminals. In this paper, even harmonic type direct conversion mixer using CECCTP (common emitter common collector transistor pair) is fabricated in SiGe-HBT technology. The fabricated mixer demonstrates conversion gain of 8.8dB and NF of 14.9dB at LO power of-6dBm when supplied voltage is 3V and current consumption is 5mA.

  393. Silicon Resistivity Design for Low-Loss On-Chip Matching Circuit Using Electro-magnetic Simulation

    ONO M., SUEMATSU N., KUBO S., NAKAJIMA K., IYAMA Y., TAKAGI T., ISHIDA O.

    IEICE technical report. Microwaves　101　(532)　29-36　2001/12/14

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In this paper, the relationship between Si substrate resistivity and the characteristics of the coplanar waveguide (CPW) type transmission line is discussed on the basis of simulated results of electro-magnetic analysis. From the simulated results, the resistivity of Si substrate should be more than about 1 kΩcm in order to realize low loss on-chip matching circuit. For the evaluation, the performance of the fabricated on-chip inductors on both high and low resistivity Si substrates are compared by using the extracted equivalent circuit parameters and the mesured insertion loss.

  394. An Even Harmonic Mixer using Self Biased Anti Parallel Diode Pair

    SHIMOZAWA Mitsuhiro, KATSURA Takatoshi, MAEDA Kenichi, TANIGUCHI Eiji, IKUSHIMA Takayuki, SUEMATSU Noriharu, ITOH Kenji, ISOTA Yoji, TAKAGI Tadashi

    IEICE technical report. Microwaves　101　(393)　93-98　2001/10/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    As increasing LO power, conversion gain of an even harmonic mixer(EH-MIX) using anti parallel diodepair(APDP) is reducing. In this report, we propose an EH-MIX using self biased APDP. This APDP has resistances for selfbiasing connected with diode in series. When LO power is added to this diode, voltage dropping in D.C. occur in the resistances, and D.C. voltage for biasing arises in LO wave. Increasing LO power, large voltage for self-bias arise, so maximum LO wave voltage adding to diodes is almost constant, and conversion gain of EH-MIX using this APDP is kept in practically. We show the mechanism in analytically. Fluctuation of a developed EH-MIX using proposed APDP in L-band is less than 1dB from 0dBm to 14dBm of LO power.

  395. Silicon Resistivity Design for Low-Loss On-Chip Matching Circuit Using Electro-magnetic Simulation

    ONO Masayoshi, SUEMATSU Noriharu, KUBO Shunji, NAKAJIMA Kensuke, IYAMA Yoshitada, TAKAGI Tadashi, ISHIDA Osami

    Proceedings of the Society Conference of IEICE　2001　(1)　287-287　2001/08/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

  396. A 2GHz Band Even Harmonic Type Si-MMIC Balanced Down Mixer Using CECCTP

    MAEDA Kenichi, TANIGUCHI Eiji, ONO Masayoshi, SUEMATSU Noriharu, TAKAGI Tadashi

    IEICE technical report. Microwaves　100　(528)　21-26　2000/12/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Even harmonic type Si-MMIC direct conversion receivers have been focused. A novel even harmonic type mixer using Common Emitter Common Collector Transistor Pair (CECCTP) is proposed. The harmonic mixing operation principle is described and verified by measurement. The measurement results of the fabricated Si-MMIC mixer including direct conversion characteristics are also described.

  397. RF Characteristics Dispersion of the L-Band Glass-Epoxy 5-bit Phase Shifter Module using SW-BANK Chips and Low Cost L, C Chips

    NAKAJIMA Kensuke, SUEMATSU Noriharu, TANIGUCHI Eiji, TAKEDA Hideji, SHINBO Toshiyuki, SASAKI Yoshinobu, TAKAGI Tadashi

    IEICE technical report. Electromagnetic compatibility　100　(364)　53-57　2000/10/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    RF characteristics dispersion and reliability of the low cost L-band 5-bit phase shifter module is described. This phase shifter module consists of GaAs SW-BANK chips and chip. inductors/capacitors mounted on glass-epoxy substrate. The calculated and fabricated RF characteristics dispersion of the phase shifter module show that the tolerance of chip inductors/capacitors is enough small for phase shifter use. The results of two reliability tests are indicated that this module configuration is feasible for a phase shifter.

  398. A 2GHz Band On-Chip matching Si-MMIC Low Noise Amplifier Fabricated in 0.35μm BiCMOS Process

    Taniguchi E., Ono M., Suematsu N., Igarashi T., Sasaki N., Takagi T.

    Proceedings of the Society Conference of IEICE　2000　(1)　54-54　2000/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  399. Characteristics of Direct Converter of 2GHz-Band Even Harmonic Tlype Si-MMIC Doubly-Balanced Down Mixer Using CECCTP

    MAEDA K., SUEMATSU N., TAKAGI T.

    Proceedings of the Society Conference of IEICE　2000　(1)　117-117　2000/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  400. A Study on Transmission Line Configuration for On-Chip Matching Si-MMIC

    Suematsu Noriharu, Ono Masayoshi, Nakajima Kensuke, Takagi Tadashi

    Proceedings of the IEICE General Conference　2000　(1)　63-63　2000/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  401. A 2GHz Band GaAs-MMIC Balanced Up Mixer using FET balan compensated parasitic capacitance

    Taniguchi E., Ono M., Sugiyama S., Kitabayashi F., Maemura K., Suematsu N., Iyama Y., Takagi T.

    Proceedings of the IEICE General Conference　2000　(1)　71-71　2000/03/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  402. L-Band Glass-Epoxy 5-bit Phase Shifter Module using SW-BANK Chips and Low Cost L, C Chips

    NAKAJIMA Kensuke, SUEMATSU Noriharu, TANIGUCHI Eiji, TAKEDA Hideji, SHINBO Toshiyuki, SASAKI Yoshinobu, TAKAGI Tadashi

    Technical report of IEICE. ICD　99　(560)　1-5　2000/01/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    A low cost L-band 5-bit phase shifter module is described. This module is fabricated on a low cost glass-epoxy substrate, and consists of GaAs SW-BANK chips and high / low pass filters for phase shift circuits made up of chip inductors / capacitors. The fabricated module shows comparable features in size and RF performance to those of MMIC in a ceramic package.

  403. A 2 GHz Band Even Harmonic Type Si-MMIC Doubly-Balanced Down Mixer Using CECCTP

    MAEDA K., SUEMATSU N., TAKAGI T.

    Proceedings of the IEICE General Conference　73-73　2000

    Publisher: The Institute of Electronics, Information and Communication Engineers

  404. A Study on Transmission Line Configuration for On-Chip Matching Si-MMIC

    SUEMATSU N., ONO M., NAKAJIMA K., TAKAGI T.

    IEICE technical report. Microwaves　99　(522)　51-56　1999/12/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

  405. High-Frequency Modeling of BJT Fabricated on High Resistive Si Substrate

    ONO M., SUEMATSU N., KUBO S., IYAMA Y., TAKAGI T., ISHIDA O.

    IEICE technical report. Microwaves　99　(370)　31-38　1999/10/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    The high resistive substrate enhances the RF performance of BJT and enables to reduce the dielectric loss of spiral inductor. In this paper, to evaluate the effect of high resistive substrate on RF performance of BJT, and the same dimension BJT's have been fabricated on both high resistive substrate and conventional low resistive substrate. The equivalent circuit parameters have been extracted by using the equivalent circuit model in consideration of dielectric loss of these substrates. The improvement effect of RF performance of BJT can be explained only with the dielectric loss of the substrate by referring the extracted equivalent circuit parameter.

  406. A Ku-Band MMIC 6-bit Variable Attenuator

    Nakajima K., Taniguchi E., Hieda M., Kurusu H., Matsuo K., Funada M., Suematsu N., Takagi T.

    Proceedings of the Society Conference of IEICE　1999　(1)　53-53　1999/08/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

  407. 800MHz-Band Si-MMIC Front-End Having Low Disotrtion Dual-Gate MOSFET Mixer

    Suematsu N., Taniguchi E., Nakajima K., Maeda K., Murakami S., Noda T., Takagi T.

    Proceedings of the Society Conference of IEICE　1999　(1)　65-65　1999/08/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

  408. High-Fequency Modeling of BJT Fabricated on High Resistive Si Substrate and the application for 5.8GHz-Band IC

    ONO Masayoshi, SUEMATSU Noriharu, KUBO Shunji, IYAMA Yoshitada, TAKAGI Tadashi, ISHIDA Osami

    Proceedings of the Society Conference of IEICE　1999　(1)　271-272　1999/08/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

  409. A 1.9 GHz Single-Chip RF Front-End GaAs MMIC with Low-Distortion Cascode FET Mixer

    NAKAYAMA Masatoshi, HORIGUCHI Kenichi, YAMAMOTO Kazuya, YOSHII Yutaka, SUGIYAMA Shigeru, SUEMATSU Noriharu, TAKAGI Tadashi

    IEICE Trans. Electron　82　(5)　717-724　1999/05/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0916-8524

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    We have demonstrated the single-chip RF front-end GaAs MMIC for the Japanese Personal Handy-phone System. It has a high efficiency HPA, a T/R switch, a LNA and a low-distortion down converter mixer. The IC employs a negative voltage generator for use of single voltage DC power supply, The HPA provides an output power of 21.5 dBm, with an ACPR of -55 dBc and an efficiency of 35%. The LNA has a noise figure of 1.6 dB and a gain of 14 dB with current of 2.3 mA. The newly developed active cascode FET mixer has a high IIP3 of -1 dBm with a high conversion gain of 10 dB and low consumption current of 2.3 mA. The IC is characterized by high performance for RF front-end of PHS handheld terminals. The IC is available in a 7.0 mm×6.4 min× 1.1 mm plastic package.

  410. Broadband Hybrid Coupled Type GaAs-MMIC 4-bit Phase Shifter with Low Insertion Loss Variation

    Taniguchi E., Iyama Y., Miyatake T., Tsukahara Y., Suematsu N., Hieda M., Takagi T.

    Proceedings of the IEICE General Conference　1999　(1)　76-76　1999/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  411. A Low Loss L-Band Si-MMIC 5-bit Attenuator using 0.35μmBiCMOS Process

    Nakajima K., Suematsu N., Ono M., Igarashi T., Sasaki N., Iyama Y., Takagi T.

    Proceedings of the IEICE General Conference　1999　(1)　74-74　1999/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  412. A 5.8GHz-Band Si-MMIC Doubly-balanced Mixer Fabricated on High Resistive Si Substrate

    ONO Masayoshi, SUEMATSU Noriharu, KUBO Shunji, IYAMA Yoshitada, TAKAGI Tadashi, ISHIDA Osami

    Proceedings of the IEICE General Conference　1999　(1)　47-47　1999/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  413. A 2.1GHz Band GaAs-MMIC Variable Gain Receiver Front-end for Wireless Communication Systems

    MAEDA K., KITABAYASHI F., NAKAJIMA K., SUGIYAMA S., ONO M., SUEMATSU N., IYAMA Y., TAKAGI T.

    Proceedings of the IEICE General Conference　1999　(1)　41-41　1999/03/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

  414. A 6GHz Band Single-Chip Transceiver Front-end GaAs MMIC for ETC

    HIEDA M., NAKAJIMA K., SUEMATSU N., TANIGUCHI E., TSUKAHARA Y., SAKAMOTO S., MIYAWAKI K., HISADA M., IYAMA Y., TAKAGI T.

    IEICE technical report. Electron devices　98　(518)　47-50　1999/01/21

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    A single-chip GaAs-MMIC transceiver front-end is developed for 6 GHz band Japanese ETC terminals. This front-end consists of a direct modulator, a variable gain amplifier, a power amplifier, a low noise amplifier and a down mixer. Since RF frequency is higher than the self-resonance frequency of chip inductors, all RF matching circuits are integrated on chip by adapting low cost SAGFET process for PHS MMIC use. The MMIC transmitter has archived output power of 14.8 dBm, modulation ratio of 0.94 and transmitter gain of 22.3 dB. The receiver has archived noise figure of 5.6 dB and receiver gain of 13.5dB. The MMIC can be used for a transceiver front-end of ETC terminals.

  415. A 5.8GHz-Band Si-MMIC Front-End Fabricated on High Resistiviy Si Substrate

    ONO M., SUEMATSU N., KUBO S., IYAMA Y., TAKAGI T., ISHIDA O.

    IEICE technical report. Microwaves　98　(420)　77-82　1998/11/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    A 5.8GHz-band on-chip matching Si-MMIC front-end was fabricated by using high resistivity Si substrate. The high resistivity substrate enables to reduce the dielectric loss of spiral inductor for on-chip matching circuit to 21% and enhances the RF performance of BJT. The Si-MMIC front-end consists of on-chip matching low noise amplifier (LNA) and doubly-balanced down mixer on high resistivity Si substrate. The total performence of front-end is 19.1dB gain, 5.0dB NF with 3V, 7.3mA d.c. power.

  416. 800MHz-Band Low Noise Low Distortion Si-MMIC Front-End Using BJT/MOSFET LNA and MOSFET Mixer

    SUEMATSU N., ONO M., KUBO S., UESUGI M., HASEGAWA K., HIROSHIGE K., IYAMA Y., ISHIDA O.

    IEICE technical report. Microwaves　98　(420)　65-70　1998/11/20

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    Both low noise and low distortion characteristics are strongly desired for cellular terminal receiver application. In the case of Si-MMIC for receiver application, BJT has low noise performance and MOSFET has low distortion performance. By using BJT amplifier as the lst. stage of LNA and MOSFET as the 2nd. stage of LNA and a down mixer, both low noise and low distortion performance is achieved as a receiver. The fabricated Si-MMIC front-end, which contains a two-stage LNA and a down mixer and a LO amplifier, performs NF of 3.7 dB, conversion gain of 16.7 dB and IIP_3 of-15.5 dBm with 3V/13.7 mA d.c. power and-10 dBm LO power.

  417. 800MHz-Band Low Noise Low Distortion Si-MMIC Front-End Using BJT/MOSFET LNA and MOSFET Mixer

    Suematsu N., Ono M., Kubo S., Uesugi M., Hasegawa K., Hiroshige K., Iyama Y., Ishida O.

    Proceedings of the Society Conference of IEICE　1998　(1)　347-348　1998/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  418. A 2-18.5GHz Band SPDT PIN Diode Switch with Low Insertion Loss and High Isolation

    Taniguchi E., Shigematsu T., Hieda M., Suematsu N., Miyatake T., Iyama Y.

    Proceedings of the Society Conference of IEICE　1998　(1)　46-46　1998/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  419. A 6 GHz Band Transceiver Front-end MMIC for ETC

    Hieda M., Nakajima K., Suematsu N., Taniguchi E., Tsukahara Y., Sakamoto S., Miyawaki K., Hisada M., Iyama Y., Takagi T.

    Proceedings of the Society Conference of IEICE　1998　(1)　69-69　1998/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  420. A Low-distortion Active Cascode FET Mixer for Personal Communication Terminals

    Nakayama M., Sugiyama S., Suematsu N., Takagi T., Ikeda Y.

    Proceedings of the Society Conference of IEICE　1998　(1)　59-59　1998/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  421. 1.9GHz-Band Si-MMIC Direct Conversion Mixer Using Anti Parallel Diode Pair

    SUGIYAMA S., SUEMATSU N., ONO M., SHIMOZAWA M., KUBO S., IYAMA Y., ISHIDA O.

    Proceedings of the Society Conference of IEICE　1998　(1)　54-54　1998/09/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

  422. A Cartesian Feedback Type Low Distortion Transmitter Having Narrow Bandwidth Loop Filter

    SUEMATSU N., IYAMA Y., ISHIDA O.

    Technical report of IEICE. OPE　98　(125)　17-24　1998/06/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    More details Close

    A 900MHz-band cartesian feedback type low distortion transmitter was developed. By using a very narrow bandwidth low pass filter as the loop filter, high open loop gain of 18.2 dB and high loop stability can be obtained. The authors obtained analytical results based on feedback amplifier theory : (1) Open loop gain of the feedback should be equal to the improvement of distortion generated at the transmitter in the case of high open loop gain. (2) In spite of delay of base band signal caused by the narrow band width loop filter, the modulation characteristic of transmitted signal is normal. These result are confirmed by the measurements.

  423. L-Band On-chip Matching Si-MMIC Low Noise Amplifier Fabricated in SOI CMOS Process

    ONO M., SUEMATSU N., YAMGUCHI Y., UEDA K., KOMURASAKI H., KUBO S., IYAMA Y., ISHIDA O.

    IEICE technical report. Microwaves　98　(74)　39-46　1998/05/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    More details Close

    Silicon On Insulator (SOI) CMOS IC have relatively high gain FET comparing with conventional BiCMOS IC, because of the reduction in lossy parasitic capacitance of FET due to the substrate structure. And also, it seems that on-chip matching SOI CMOC Si-MMIC with low loss reactive matching circuit can be realized, if the lossy parasitic capacitance of on-chip spiral inductor is reduced by changing the substrate. In this paper, spiral inductors were fabricated in both 0.35μm SOI CMOS process and standard BiCMOS process. In the case of SOI CMOS, the extracted parasitic capacitance of the spiral inductor can be reduced to a half of that in the case of conventional BiCMOS. By using this spiral inductor for the reactive matching circuit, on-chip matching SOI CMOS Si-MMIC LNA was developed. This LNA performs 8.7dB gain, 4.2dB NF, -2dBm IIP_3 at 2.1GHz with 3V, 3mA d.c.power.

  424. Modulation Characteristics of Cartesian Feedback type Low Distortion Transmitter with Very Narrow Base Band Loop Filter

    SUEMATSU N., SUGIYAMA S., ADACHI H., IYAMA Y.

    Proceedings of the IEICE General Conference　1998　(1)　452-452　1998/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

  425. A 5.8GHz-Band On-Chip Matching Si-MMIC Low Noise Amplifier Fabricated on High Resistive Si Substrate

    ONO M., SUEMATSU N., KUBO S., IYAMA Y., TAKAGI T., ISHIDA O.

    Proceedings of the Society Conference of IEICE　33-33　1998

    Publisher: The Institute of Electronics, Information and Communication Engineers

  426. On-chip Matching Si-MMIC Receiver Front-End for Mobile Communication Terminal Applications

    SUEMATSU Noriharu

    Proceedings of the Society Conference of IEICE　1997　(1)　351-352　1997/08/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

  427. L-Band Si-MMIC Schottky-Barrier mode Mixer Using BiCMOS Process

    ONO M., SUEMATSU N., KUBO S., IYAMA Y., ISHIDA O.

    Proceedings of the IEICE General Conference　1997　(1)　109-109　1997/03/06

    Publisher: The Institute of Electronics, Information and Communication Engineers

  428. A 1.9Ghz Band On-chip Matching Si-MMiC Reciever Front-end

    SUEMATSU N., ONO M., KUBO S., SATO H., IYAMA Y., ISHIDA O.

    Proceedings of the Society Conference of IEICE　1996　(1)　55-55　1996/09/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

  429. A 1.9GHz Band On-chip Matching Si-MMIC Reciever Front-end

    SUEMATSU N., ONO M., KUBO S., SATO H., IYAMA Y., ISHIDA O.

    Technical report of IEICE. SAT　96　(169)　27-33　1996/07/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    More details Close

    A 1.9GHz-band Si-MMIC front-end was developed, which includes MOSFET T/R switch, two-stage BJT low noise amplifier (LNA), and down converter BJT mixer. This IC front-end is monolithically integrated on a low resistive Si substrate with coplanar waveguide (CPW) type matching circuits in standard 0.8μm Bi-CMOS process. The T/R switch of the front-end has the measured insertion loss of 2.5dB and isolation of 25.5dB at 0/3V control voltage. The LNA has gain of 17.1dB and noise figure (NF) of 2.9dB at 2V, 4mA d.c. supply. The mixer has conversion gain of 5.9dB and NF of 15dB at 2V, 1.7mA d.c. supply. The measured performance of this IC front-end indicates the possibility of application for mobile communication handset terminals.

  430. Cartesian Feedback type 900MHz-Band Low distortion Transmitter

    Suematsu N., Shimozawa M., Shigematsu T., Iida A., Iyama Y.

    Proceedings of the IEICE General Conference　1996　(1)　93-93　1996/03/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

  431. A 6-18GHz Band SPDT PIN Diode Switch with Impedance Transformer

    Shigematsu T., Suematsu N., Takeuchi N., Iyama Y.

    Proceedings of the IEICE General Conference　1996　(1)　61-61　1996/03/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

  432. L-Band Internally Matched Si-MMIC Low Noise Amplifier

    Ono M., Suematsu N., Shigematsu T., Sato J., Kubo S., Iyama Y.

    Proceedings of the IEICE General Conference　1996　(1)　88-88　1996/03/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

  433. Attenuation Constant of Microstrip Line for Si-MMIC versus Silicon Substrate Resistivity

    ONO M., SUEMATSU N., SHIGEMATSU T., KUBO S., IYAMA Y., ISHIDA O.

    Proceedings of the Society Conference of IEICE　51-51　1996

    Publisher: The Institute of Electronics, Information and Communication Engineers

  434. An 800MHz-Band Down Converter Module for Antenna Diversity Type Mobile Communication Handset Terminals

    Suematsu N., Ono M., Nagatsuka T., Hiroshige K., Sugiyama S., Takamoto A., Sakai A., Maemura K., Kasai N., Iyama Y., Iida A.

    Technical report of IEICE. SST　95　(248)　37-43　1995/09/22

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    A 800MHz-band internal matched down converter module was developed for antenna diversity type mobile communication handset terminals. This module includes dual input one stage GaAs FET low noise amplifier(LNA) with switching function, SAW filter, and GaAs dual-gate FET mixer. Since the dual input LNA works as two independent LNAs and SPDT switch, very small size and low cost downconverter mudule for antenna diversity type handset terminals can be realized. At -10dBm local input power and 4.0mA supplied d. c. current/3V d. c. voltage, noise figure of 3.5dB and conversion gain of 20dB were obtained.

  435. An 8OOMHz Bamd Antenna Diversity Type Down Converter Module for Mobile Communication Handset Terminals

    SUEMATSU N, ONO M, NAGATSUKA T, SUGIYAMA S, TAKAMOTO A, HIROSHIGE K, SAKAI A, MAEMURA K, KASAI N, IYAMA Y, IIDA A

    Proceedings of the Society Conference of IEICE　1995　(2)　95-95　1995/09/05

    Publisher: The Institute of Electronics, Information and Communication Engineers

  436. A C-Band High Isolation Switch Matrix using Dual Gate FETs

    SHIGEMATSU Tomonori, ITOH Kenji, SUEMATSU Noriharu, NAKANE Masafumi, CHAKI Shin, IYAMA Yoshitada, IIDA Akio

    IEICE technical report. Microwaves　95　(178)　59-63　1995/07/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    More details Close

    A C-band high isolation switch matrix using dual gate FETs was developed. Since dual gate FETs were used as switching elements, high isolation characteristics could be obtained as a switch matrix. Since gain of ON state unit switch could be controled by voltage of second gate bias, a gain deviation of switch matrix could be compensated. An isolation of 65dB, a gain deviation of 3dB were obtained.

  437. Simple Calculation Method of the Intermodulation Distortion of Multiple-Carrier Amplifiers Operating in Weakly Non-linear Region

    SUEMATSU Noriharu, IIDA Akio, TAKAGI Tadashi, URASAKI Shuji

    The Transactions of the Institute of Electronics,Information and Communication Engineers. C-(0xF9C1)　78　(3)　187-193　1995/03/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0915-1893

  438. 900MHz-Band Low-Current Down Converter Module for Mobile Communication

    Shimozawa Mitsuhiro, Iyama Yoshitada, Itou Kenji, Suematsu Noriharu, Nagatsuka Tsutomu, Sugiyama Shigeru

    IEICE technical report. Microwaves　MW94-21　1994

    Publisher: The Institute of Electronics, Information and Communication Engineers

    More details Close

    A 900MHz-band internal matched down converter module,including one stage low noise GaAs FET amplifier,SAW filter,and GaAs dual- gate FET mixer,was developed.The bias condition of GaAsMESFETs was adjusted to achieve both low DC current and low noise characteristics.At-10dBm local input power and 2.5mA supplied DC current,noise figure of 3.5dB and conversion gain of 20dB were obtained.

Show all ︎Show first 5

Books and Other Publications 2

  1. ソフトウェアで作る無線機の設計法

    太郎丸 眞, 阪口 啓, 高田 潤一, 荒木 純道, 眞田 幸俊, 横野 聡, 末松 憲治, 上原 一浩, 藤井 威生, 原田 博司, 宮本 健宏, 小島 浩

    科学情報出版(株)　2016/09/28

    ISBN: 9784904774472

  2. マイクロ波技術講座第6巻 集積回路と応用

    田中 愼一, 中井 信也, 岩田 直高, 板倉 眞, 末松 憲治, 伊藤 康之

    日刊工業新聞社　2002/06/25

    ISBN: 4526049719

Presentations 91

  1. 広帯域ダイレクトRFアンダーサンプリング周波数センサにおける受信RF周波数特定法の検討

    古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会マイクロ波研究会（MW)　2017/12/19

  2. 位置情報を用いた異種無線システムのネットワーク選択手法 International-presentation

    亀田卓, 福留秀基, 末松憲治

    電子情報通信学会ソフトウェア無線研究会（SR)　2017/10/23

  3. QZSS/GPS高精度時刻・位置情報を活用したMassive Connect IoT

    亀田卓, 小熊博, 末松憲治

    電子情報通信学会無線通信システム研究会（RCS)　2017/10/19

  4. Direct Digital RF technologies for Beyond Nyquist Frequency Range International-presentation

    末松憲治, 本良瑞樹, 亀田卓

    RIEC Russia-Japan Joint International Microwave Workshop 2017　2017/10/18

  5. Ultra Low Power Oscillator for Millimeter-wave IoT for Beyond Nyquist Frequency Range International-presentation

    本良瑞樹, 亀田卓, 末松憲治

    RIEC Russia-Japan Joint International Microwave Workshop 2017　2017/10/18

  6. 高次ナイキストゾーンにおけるマンチェスタ符号を用いた1ビットバンドパスΔΣ変調器のSNR

    数野将史, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会マイクロ波研究会　2017/09/21

  7. 28GHz帯ダイレクトRFアンダーサンプリング受信用サンプルホールドCMOS IC

    吉野長浩, 則島景太, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会マイクロ波研究会（MW)　2017/09/21

  8. 高次ナイキストゾーンにおける1ビットローパスΔΣ変調RZ-DAC変調出力のSNR

    数野将史, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会 2017年ソサイエティ大会　2017/09/12

  9. ダイレクトRFアンダーサンプリング受信機を用いた広帯域リアルタイム型周波数モニタリングの提案

    末松憲治, 本良瑞樹, 古市朋之, 亀田卓

    電子情報通信学会 2017年ソサイエティ大会　2017/09/12

  10. 人体ブロッキングによる減衰量の測定に基づくミリ波帯WBAN間干渉の検討

    秋元浩平, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会 2017年ソサイエティ大会　2017/09/12

  11. 広帯域ダイレクトRFアンダーサンプリング周波数センサにおける受信周波数特定のためのクロック周波数切り替え条件の検討

    古市朋之, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会 2017年ソサイエティ大会　2017/09/12

  12. 位置情報を用いた異種無線融合システムのスループット改善手法:トラヒックリレーの提案と特性評価

    小野貴博, 劉沁寒, 秋元浩平, 亀田卓, 末松憲治

    電子情報通信学会 2017年ソサイエティ大会　2017/09/12

  13. QZSSショートメッセージSS-CDMA通信の実験的評価 －送信タイミング制御システムのSOC化検討－

    小熊博, 富山工業高等専門学校, 浅井剛(ネクスト・ディメンション, 河合怜, 富, 亀田卓, 末松憲治

    電子情報通信学会 2017年ソサイエティ大会　2017/09/12

  14. 釧路地域におけるBeidouシステムによる標高測定精度

    山形文啓, 小熊博, 富, 亀田卓, 末松憲治

    電子情報通信学会 2017年ソサイエティ大会　2017/09/12

  15. 57GHz 130uW低消費電力ミリ波CMOS発振器

    本良瑞樹, 末松憲治, 亀田卓

    電子情報通信学会 2017年ソサイエティ大会　2017/09/12

  16. 28GHz帯ダイレクトRFアンダーサンプリング受信用サンプルホールドCMOS IC

    吉野長浩, 則島景太, 本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会 2017年ソサイエティ大会　2017/09/12

  17. 縦積みレッヘル給電線路を用いたミリ波体内外通信アンテナ

    武田尚之, 斉藤琢斗, 本良瑞樹, 亀田 卓, 末松憲治

    マイクロ波研究会(MW)　2017/06/22

  18. QZSSショートメッセージSS-CDMA通信の実験的評価

    河合怜, 小熊博, 大屋慶, 亀田卓, 末松憲治

    スマート無線研究会 (SR)　2017/05/25

  19. マルチキャリアダイレクトRFアンダーサンプリング受信機用高SNR CMOSサンプルホールドIC

    本良瑞樹, 亀田卓, 末松憲治

    スマート無線研究会 (SR)　2017/05/25

  20. 位置情報を用いた異種無線融合システムのネットワーク選択手法: トラヒックナビゲーションにおけるユーザ満足度の評価

    劉沁寒, 秋元浩平, 亀田卓, 末松憲治

    無線通信システム研究会 (RCS)　2017/04/24

  21. SDNの広域無線通信網への展開の検討

    吉野長浩, 小熊博, 亀田卓, 末松憲治

    無線通信システム研究会 (RCS)　2017/04/24

  22. 低周波数成分のみを用いるアダブティプフェーズドアレイ制御方式

    TA TUANTHANH, 亀田卓, 末松憲治, 高木直, 坪内和夫

    マイクロ波研究会(MW)　2017/03/02

  23. 位置情報を用いた仮想セクタ方式によるWLAN隠れ端末問題の解消：シャドウイング環境におけるセクタ再分割手法の評価

    秋元浩平, 亀田 卓, 末松憲治, 高木 直, 坪内和夫

    無線通信システム研究会 (RCS)　2016/08/18

  24. OpenFlowの衛星通信ネットワークへの適用検討

    吉野長浩, 小熊 博, 亀田 卓, 末松憲治

    安全・安心な生活とICT研究会（ICTSSL）　2016/06/14

  25. Direct RF Undersampling Receiver for High-SHF Applications International-presentation

    Noriharu Suematsu, K. Norishima・T. Koizumi, T. Owada, Mizuki Motoyoshi, Suguru Kameda

    マイクロ波研究会(MW)　2016/06/09

  26. A 50 GHz-Band Varactor-Tuned Injection Locked Dynamic Frequency Divider in 65 nm CMOS International-presentation

    Masafumi Kazuno, Mizuki Motoyoshi, Suguru Kameda, Noriharu Suematsu

    マイクロ波研究会(MW)　2016/06/09

  27. Evaluation of Location-Based Virtual Sector Method for Hidden Terminal Problem in WLAN International-presentation

    Kohei Akimoto, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    スマート無線研究会 (SR)　2016/05/16

  28. Measurement of 3.5 GHz Band Small Cell Indoor-Outdoor Propagation: Visualization Method of RSSI in 3-dimensional Geospace International-presentation

    Hideki Fukudome, Kohei Akimoto, Suguru Kameda, Noriharu Suematsu, Tadashi Takagi, Kazuo Tsubouchi

    スマート無線研究会 (SR)　2016/05/16

  29. 人体内外通信システム

    本良瑞樹, 亀田卓, 末松憲治

    電子情報通信学会 中国支部講演会　2016/03/03

  30. 人体内通信システム構築用電波伝搬周波数特性に関する検討

    本良瑞樹, 亀田 卓, 末松憲治

    マイクロ波研究会(MW)　2016/03/02

  31. 高SHF帯ビームフォーミングシステム用ダイレクトRFアンダーサンプリング受信機

    末松憲治, 亀田 卓, 本良瑞樹

    マイクロ波研究会(MW)　2016/03/02

  32. 3.5GHz帯スモールセル屋内→屋外伝搬環境における通信距離の実測評価

    福留秀基, 秋元浩平, 亀田 卓, 末松憲治, 高木 直, 坪内和夫

    スマート無線研究会 (SR)　2016/01/21

  33. QZSSショートメッセージSS-CDMA通信：予告チャネルを用いたランダムアクセス制御手法における公平性の検討

    大屋 慶, 高橋智英, 亀田 卓, 小熊 博, 平 明徳, 末松憲治, 高木 直, 坪内和夫

    スマート無線研究会 (SR)　2016/01/21

  34. 災害時に有効な可搬型マルチモードVSAT

    末松憲治

    マイクロウェーブ展2015(MWE 2015)　2015/11/25

  35. Ka帯ダイレクトRFアンダーサンプリング受信用CMOS S/H IC○則島景太・小泉友和・本良瑞樹・亀田 卓・末松憲治・高木 直・坪内和夫（東北大）

    則島景太, 小泉友和, 本良瑞樹, 亀田 卓, 末松憲治, 高木 直, 坪内和夫

    マイクロ波研究会(MW)　2015/11/19

  36. ミリ波RFICフリップチップ実装時のアンダーフィルの影響

    斉藤琢斗, 中山英太, 本良瑞樹, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2015/09/08

  37. ファイバ型異方性導電接着フィルムを用いたRFICフリップチップ実装の検討

    大和田健夫, 本良瑞樹, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2015/09/08

  38. Ka帯ダイレクトRFアンダーサンプリング受信用サンプル・ホールドCMOS IC

    則島景太, 小泉友和, 本良瑞樹, バンダダリソー, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2015/09/08

  39. マーチャントバランを用いた60GHz帯CMOSトランジスタペア形偶高調波ミクサ

    稲垣隆二, 津留正臣, 谷口英司, 福本宏, 亀田卓, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2015/09/08

  40. 位置情報を用いた異種無線融合システムのネットワーク選択手法：ユーザ数差異を考慮した経路予測スケジューリングの評価

    劉沁寒, 窪庭純平, 亀田卓, 平明徳, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2015/09/08

  41. WLANマルチセル環境における位置情報を活用した干渉制御手法の評価

    秋元浩平, 亀田卓, 平明徳, 末松憲治, 高木直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2015/09/08

  42. マルチGNSS対応スマートフォンの位置捕捉精度の実測評価

    小関紘明, 小熊博, 富, 小泉敦, 富, 亀田卓, 末松憲治

    電子情報通信学会 ソサイエティ大会　2015/09/08

  43. 衛星回線を想定したOpenFlowによるネットワーク評価

    吉野長浩, 小熊博, 富, 亀田卓, 末松憲治

    電子情報通信学会 ソサイエティ大会　2015/09/08

  44. QZSS SS-CDMA Location and Short Message Communication System International-presentation

    Noriharu Suematsu, Suguru Kameda, Yuji Miyake, Tpmohide Takahashi, Akinori Taira, Tadashi Takagi, Kazuo Tsubouchi

    マイクロ波研究会(MW)　2015/08/10

  45. A 60GHz Band 3-D Phased Array Antenna Module for Beam Forming W-PAN receivers International-presentation

    Noriharu Suematsu, Mizuki Motoyoshi, Satoshi Yoshida, Yuya Suzuki, Wenying Ye, Surugu Kameda, Tadashi Takagi, Kazuo Tsubouchi

    マイクロ波研究会(MW)　2015/08/06

  46. 1-bit BP-DSM方式における非線形符号間干渉の補償

    前畠 貴, 亀田 卓, 末松憲治

    スマート無線研究会 (SR)　2015/07/29

  47. ダイレクトRFアンダーサンプリング受信用Ku帯直並列スイッチ形S/H IC

    小泉友和, 本良瑞樹, バンダ ダリソー, 和田 平, 亀田 卓, 末松憲治, 高木 直, 坪内和夫

    マイクロ波研究会(MW)　2015/07/16

  48. ファイバ型異方性導電接着フィルムを用いたRFICフリップチップ実装の検討

    大和田健夫, 本良瑞樹, 亀田 卓, 末松憲治, 高木 直, 坪内和夫

    マイクロ波研究会(MW)　2015/07/16

  49. 位置情報を用いた異種無線融合システムのネットワーク選択手法: 経路予測スケジューリングの評価

    劉 沁寒, 窪庭純平, 亀田 卓, 平 明徳, 末松憲治, 高木 直, 坪内和夫

    無線通信システム研究会 (RCS)　2015/06/24

  50. QZSS端末のGPS補完とGPS補強の実測評価

    小熊 博, 則島景太, 末広小夏, 三宅裕士, 亀田 卓, 平 明徳, 末松憲治, 高木 直, 坪内和夫

    無線通信システム研究会 (RCS)　2015/04/16

  51. QZSSショートメッセージSS-CDMA通信における仰角マスクを考慮した時間同期精度の実験的検証

    三宅裕士, 亀田 卓, 平 明徳, 則島景太, 小熊 博, 末松憲治, 高木 直, 坪内和夫

    無線通信システム研究会 (RCS)　2015/04/16

  52. WLANマルチセル環境における位置情報を活用した干渉制御手法

    秋元浩平, 亀田 卓, 平 明徳, 末松憲治, 高木 直, 坪内和夫

    無線通信システム研究会 (RCS)　2015/04/16

  53. QZSSショートメッセージSS-CDMA通信における時刻同期精度の実験的検証

    三宅裕士, 秋元浩平, 亀田 卓, 平 明徳, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 総合大会　2015/03/10

  54. 高密度端末環境下に有効な独立チャネルでRTS/CTS予約を行う無線LAN制御方式

    黄 敏之, 三宅裕士, 亀田 卓, 平 明徳, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 総合大会　2015/03/10

  55. バンドパスデルタシグマ変調における非線形成分の抑圧技術

    前畠 貴, 末松憲治, 亀田 卓

    電子情報通信学会 総合大会　2015/03/10

  56. QZSS/GPS高精度位置情報を用いたトラヒックナビゲーション

    亀田 卓, 窪庭純平, 三宅裕士, 平 明徳, 小熊 博, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 総合大会　2015/03/10

  57. 災害時に有効な衛星通信ネットワークの実証実験

    亀田 卓, 小熊 博, 笹沼 満(スカパーJSAT, 江口 茂(アイ, エス, ビ, 黒田幸明(サイ, 末松憲治

    電子情報通信学会 総合大会　2015/03/10

  58. 3bit移相器を内蔵したKa帯自己注入同期VCO-ICの試作

    川崎健吾, 津留正臣, 谷口英司, 福本 宏, 亀田 卓, 末松憲治, 平 明徳, 高木 直, 坪内和夫

    電子情報通信学会 総合大会　2015/03/10

  59. Ku帯ダイレクトRFアンダーサンプリング受信用サンプル・ホールドCMOSIC

    小泉友和, 本良瑞樹, バンダ ダリソー, 和田 平, 亀田 卓, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 総合大会　2015/03/10

  60. ミリ波5bit BBビームフォーミング用5GHz IF帯受信モジュール

    中村美琴, タ トァン タン, 亀田 卓, 末松憲治, 平 明徳, 高木 直, 坪内和夫

    電子情報通信学会 総合大会　2015/03/10

  61. ミリ波広帯域通信用低域ループ制御自律ビームフォーミングIF受信器

    中村 美琴, タ トァン タン, 本良 瑞樹, 亀田 卓, 末松 憲治, 平 明徳, 高木 直, 坪内 和夫

    マイクロ波研究会(MW)　2015/03/05

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    信学技報 MW2014-227

  62. QZSSショートメッセージSS-CDMA通信における同期精度の実験的検証

    秋元 浩平, 三宅 裕士, 亀田 卓, 平 明徳, 末松 憲治, 高木 直, 坪内 和夫

    スマート無線研究会 (SR)　2015/01/29

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    信学技報 SR2014-96

  63. 位置情報を用いた異種無線融合システムのネットワーク選択手法:天空率とメッシュ化処理

    則島 景太, 末広 小夏, 法土 千里, 小熊 博, 窪庭 純平, 亀田 卓, 平 明徳, 末松 憲治, 高木 直, 坪内 和夫

    スマート無線研究会 (SR)　2015/01/29

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    信学技報 SR2014-98

  64. 位置情報を用いた異種無線システムのネットワーク選択手法:トラヒックナビゲーションの提案

    窪庭 純平, 三宅 裕士, 亀田 卓, 平 明徳, 小熊 博, 末松 憲治, 高木 直, 坪内 和夫

    スマート無線研究会 (SR)　2015/01/29

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    信学技報 SR2014-99

  65. 災害時に有効なマルチモード可搬型VSAT

    末松 憲治, 亀田 卓, 小熊 博, 笹沼 満, 江口 茂, 黒田 幸明

    マイクロ波研究会(MW)　2015/01/15

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    信学技報 MW2014-184

  66. 異種無線融合システムにおける位置情報を用いたネットワーク選択手法:接続ユーザ数を考慮したスループット評価

    窪庭 純平, 三宅 裕士, 亀田 卓, 平 明徳, 小熊 博, 末松 憲治, 高木 直, 坪内 和夫

    無線通信システム研究会 (RCS)　2014/12/18

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    信学技報 RCS2014-229

  67. [Technology Exhibit] Multi-Mode Portable SDR VSAT for Disaster-Resilient Wireless Networks International-presentation

    亀田 卓, 小熊 博, 笹沼 満, 江口 茂, 黒田 幸明, 末松 憲治

    スマート無線研究会 (SR)　2014/10/30

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    信学技報 SR2014-69

  68. [Poster Presentation] Network Selection Scheme Using Positioning Information for Heterogeneous Wireless System: Throughput Evaluation Considering Selection Resource Utilization International-presentation

    窪庭 純平, 三宅 裕士, 亀田 卓, 平 明徳, 小熊 博, 末松 憲治, 高木 直, 坪内 和夫

    スマート無線研究会 (SR)　2014/10/30

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    信学技報 SR2014-84

  69. 60GHz帯異平面ビーム合成3-D PAAモジュールの検討

    葉 文穎, 鈴木祐也, 吉田賢史, 谷藤正一, 亀田 卓, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2014/09/23

  70. 次世代VSAT経由の避難者情報管理システムの評価

    松浦草太, 小泉 敦, 小熊 博, 亀田 卓, 末松憲治

    電子情報通信学会 ソサイエティ大会　2014/09/23

  71. 衛星測位情報を活用する地上系広域情報収集ネットワークの提案

    平 明徳, 三宅裕士, 亀田 卓, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2014/09/23

  72. 高負荷な環境における,独立な制御チャネルを用いた無線LANシステムの遅延時間の評価

    黄 敏之, 三宅裕士, 亀田 卓, 平 明徳, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2014/09/23

  73. 位置情報を用いた異種無線融合システムのネットワーク選択手法:ハンドオーバオフセットを考慮したスループット評価

    窪庭純平, 三宅裕士, 亀田 卓, 平 明徳, 小熊 博, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2014/09/23

  74. 位置情報を用いた異種無線融合システムのネットワーク選択手法:信号品質MAPの実装

    小熊 博, 則島景太, 小泉 敦, 窪庭純平, 亀田 卓, 平 明徳, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2014/09/23

  75. （依頼講演）QZSS/GPS高精度位置情報を用いた異種無線融合システムのネットワーク選択手法

    亀田 卓, 窪庭純平, 三宅裕士, 平 明徳, 小熊 博, 末松憲治, 高木 直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2014/09/23

  76. ディジタルRFのマルチバンド・マルチモード化技術

    末松憲治

    電子情報通信学会 ソサイエティ大会　2014/09/23

  77. ミリ波通信アレーアンテナ用 低域ループ制御自律 BF 方式の動作検証実験

    中村美琴, タ トァン タン, 亀田 卓, 末松憲治, 平 明徳, 高木 直, 坪内和夫

    電子情報通信学会 ソサイエティ大会　2014/09/23

  78. 1ビットバンドパスΔΣ変調による高調波成分を用いた送信器

    前畠 貴, 亀田 卓, 末松 憲治

    衛星通信研究会 (SAT)　2014/08/19

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    信学技報 SAT2014-27

  79. ［招待講演］災害時に有効な衛星通信ネットワーク:マルチモードSDR VSATの開発と実証実験

    亀田 卓, 小熊 博, 笹沼 満, 江口 茂, 黒田 幸明, 末松 憲治

    無線通信システム研究会 (RCS)　2014/08/19

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    信学技報 RCS2014-146

  80. ［招待講演］準天頂衛星システムを活用するSS-CDMAショートメッセージ通信

    平 明徳, 三宅 裕士, 亀田 卓, 末松 憲治, 高木 直, 坪内 和夫

    無線通信システム研究会（RCS）　2014/07/30

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    信学技報 RCS2014-124

  81. 1 GHz帯ダイレクトアンダーサンプリング受信用シリーズ/シャント型サンプル・ホールドCMOSIC

    小泉 友和, 本良 瑞樹, バンダ ダリソー, 和田 平, 亀田 卓, 末松 憲治, 高木 直, 坪内 和夫

    マイクロ波研究会(MW)　2014/07/17

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    信学技報 MW2014-81

  82. ブロードバンド通信アレーアンテナ用低域ループ制御自律ビームフォーミング方式の検討

    中村 美琴, タ トァンタン, 亀田 卓, 末松 憲治, 平 明徳, 高木 直, 坪内 和夫

    マイクロ波研究会(MW)　2014/07/17

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    信学技報 MW2014-82

  83. 異種無線融合システムにおける位置情報を用いたネットワーク選択手法の通信容量評価

    窪庭 純平, 三宅 裕士, 亀田 卓, 平 明徳, 末松 憲治, 高木 直, 坪内 和夫

    無線通信システム研究会 (RCS)　2014/06/17

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    信学技報 RCS2014-36

  84. QZSSショートメッセージSS-CDMA通信のレイリーフェージング環境における基本特性

    秋元 浩平, 三宅 裕士, 亀田 卓, 平 明徳, 末松 憲治, 高木 直, 坪内 和夫

    無線通信システム研究会 (RCS)　2014/06/17

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    信学技報 RCS2014-37

  85. ［技術展示］災害時に有効な衛星通信ネットワーク: ソフトウェア無線技術を用いたマルチモードVSATの開発

    亀田 卓, 小熊 博, 笹沼 満, 江口 茂, 黒田 幸明, 末松 憲治

    スマート無線研究会 (SR)　2014/05/22

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    信学技報 SR2014-8

  86. ［技術展示］１ビットバンドパスΔΣ変調方式によるマルチキャリア送信

    前畠 貴, 亀田 卓, 末松 憲治

    スマート無線研究会 (SR)　2014/05/22

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    信学技報 SR2014-XXX

  87. 1ビットデジタルRFにおける非対称成分推定法の提案

    前畠 貴, 亀田 卓, 末松 憲治

    スマート無線研究会 (SR)　2014/05/22

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    信学技報 SR2014-16

  88. QZSSショートメッセージSS-CDMA通信:予告チャネルを用いたランダムアクセス制御の効率改善に関する評価

    亀田 卓, 高橋 智英, 三宅 裕士, 平 明徳, 山形 文啓, 小熊 博, 末松 憲治, 高木 直, 坪内 和夫

    衛星通信研究会 (SAT)　2014/05/15

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    信学技報 SAT2014-3

  89. 異種無線統合ネットワークにおけるマルチGNSSを用いたシステム選択用MAP情報構築法の検討

    小熊 博, 則島 景太, 小泉 敦, 山形 文啓, 窪庭 純平, 亀田 卓, 末松 憲治, 平 明徳, 高木 直, 坪内 和夫

    衛星通信研究会 (SAT)　2014/05/15

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    信学技報 SAT2014-4

  90. A 60 GHz-band 2x4 Dipole Array Antenna Module Using 3-D SiP Technology International-presentation

    S. Kameda, Y. Suzuki, S. Yoshida, N. Suematsu, T. Takagi, K. Tsubouchi

    Technical University of Dresden and Tohoku University Symposium 2012　2012/11/02

  91. ３次元システム・イン・パッケージ実装技術を用いた６０ＧＨｚ帯超小型ＲＦモジュール

    亀田 卓, 高木 直, 坪内 和夫

    エレクトロニクス実装学会超高速高周波エレクトロニクス実装研究会　2010/07/30

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Research Projects 4

  1. Zero-Overhead Synchronized Wireless Full-Duplex Communication for Massive Connect IoT

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Hiroshima University

    2021/04/01 - 2024/03/31

  2. mm-Wave/Sub-THz on-chip antenna array beamforming for high speed wireless communication

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows

    Category: Grant-in-Aid for JSPS Fellows

    Institution: Tohoku University

    2020/11/13 - 2023/03/31

  3. Experimental Evaluation and Demonstration of Massive Connect IoT with High-Efficiency Synchronous Wireless Network

    Kameda Suguru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2016/04/01 - 2019/03/31

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    To realize Massive Connect IoT, we have proposed uplink synchronous spread spectrum code division multiple access (SS-CDMA) communication by using high-accurate transmission timing control method. The proposed transmission timing control method can be achieved by getting time and position information from the Quasi-Zenith Satellite System (QZSS) and the Global Positioning System (GPS). Based on the positioning signals obtained from QZSS and GPS, we experimentally verified to what degree of accuracy each terminal can control transmission timing.

  4. Development of Current-Mode Direct Digital Conversion RF-IC

    SUEMATSU Noriharu, KAMEDA Suguru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

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    We have developed RF circuit technologies for multi-band / multi-mode direct digital RF transceiver. For transmitter, we proposed direct digital RF modulator which consists of current mode DAC and broad-band (multi-band) LO circuits (90degree divider and LO switches). By selecting number of active bit and clock frequency (over sampling number) of the DAC, multi-mode characteristic can be achieved. For receiver, we proposed direct RF undersampling receiver which consists of high speed ON/OFF LNA and high frequency BPF type S/H IC’s. By using these circuits, both high dynamic range and low power consumption can be obtained.

Other 3

  1. 高SHF帯ビームフォーミングアンテナ用超小型ダイレクトRFサンプリング受信機の研究開発

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    従来のRFアナログ回路を多用するヘテロダイン方式やダイレクトコンバージョン方式とは異なるダイレクトRFサンプリング方式を用いる受信機を提案し，世界最高速となる28GHz帯でアンダーサンプリング受信用RF-ICを試作し，複数の異なる信号を所定の位相でビーム合成可能な，ビームフォーミング受信機を開発する。

  2. Ka/KuデュアルバンドPAA用ビームフォーミング回路の研究開発

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    Ku 帯の現行システムと，将来のKa 帯の両方システムに対応可能なKa/Ku デュアルバンドVSAT を実現するための，PAA用ビームフォーミング回路を開発する。

  3. 災害時に有効な衛星通信ネットワークの研究開発

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    被災地においてニーズに応じた衛星回線の円滑な確保を図るため，複数の衛星システムに対応可能とするためのマルチモード地球局技術，地球局の消費電力を低減させるための省電力可搬地球局技術及び衛星回線の収容効率を向上させるための通信帯域最適化制御技術の研究開発を行う。