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Development of in-service measurement equipment of multipath delay time for-high rate TDMA mobile communication

Research Project

Project/Area Number 02555066
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 電子通信系統工学
Research InstitutionKyoto University

Principal Investigator

YOSHIDA Susumu  Kyoto University, Faculty of Engineering, Professor, 工学部, 教授 (50026324)

Co-Investigator(Kenkyū-buntansha) TAKEUCHI Tsutomu  Kyoto University, Faculty of Engineering, Instructor, 工学部, 助手 (20154974)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 1991: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1990: ¥3,400,000 (Direct Cost: ¥3,400,000)
KeywordsDigital communication / Mobile communication / Multipath fading / Multipath delay spread / Co-channel interference / 多重波伝搬 / ダイバ-シチ受信
Research Abstract

Multipath propagation with large delay time difference causes severe bit-error-rate degradation of high bit-rate mobile radio communications system. Thus, the measurement of multipath delay time is very important to estimate the transmission quality. However, it has been generally very difficult to measure multipath delay time. Transmission of a broadband pseudo-random noise sequence and reception by sliding correlation technique are generally used to measure multipath delay profile. This makes the measurement of delay time to be costly and timeconsuming.
In this research, we developed a very simple, yet convenient in-service multipath delay spread measurement equipment for high-rate digital mobile communication. The major results are summarized as follows :
1. (1) By simply measuring a quadrature channel detector output of a differential detector for a BPSK signal, delay spread can be estimated.
2. (1) By simply measuring the difference between magnitudes of in-phase channel and quadrature channel detector outputs for a pi/4-shifted QPSK signal, delay spread can be estimated.
3. Both measurement circuits were shown to be implemented very easily.
4. For both cases, measured outputs were shown to well-correspond to the bit-error-rate performance.
5. Co-channel interference or carrier-to- interference ratio (C/I) is also found to be measured by the same circuits. This is especially useful as a criterion of decision making for intrand inter-cell handoff.
6. Even when multipath delay spread and co- channel interference co-exist, still the measured output was confirmed to be a good measure of bit-error-rate performance.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] Hong Zhou: "Selection diversity reception based on cross-channel-interference measurement for digital mobile radio" Transactions of IEICE. E73. 658-664 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Byong Jin Cho: "A simple multipath delay time detection method for π/4 shift QPSK in digital mobile/portable communications" Proc.IEEE Vehicular Technology Conference,St.Louis(VTC'91). 7-12 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Susumu Yoshida: "Simple method of multipath delay difference detection for π/4-shift QPSK" Electronics Letters. 27. 1027-1028 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 平井 淳生: "π/4シフトQPSK用簡易多重波遅延時間検出装置の試作" 電子情報通信学会技術研究報告RCS91ー14. 91. 53-59 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Susumu Yoshida: "In-service monitoring of multipath delay-spread and C/I for QPSK signal" Proc.IEEE Vehicular Technology Conference,Denver(VTC'92). (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Atsuo Hirai: "Convenient co-channel interference detection methods for digital cellular radio" Proc. International Symposium on Antennas and Propagation,Sapporo. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Hong Zhou: "Selection diversity reception based on cross-channel-interference measurement for digital mobile radio" Transaction of Institute of Electronics, Information and Communication Engineers. E73. 658-664 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Tadashi Nakamura: "A detection method of delayed multipath signal for QPSK signal" Proceedings of Spring National Convention of IEICE. 2-405 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Byong Jin Cho: "A simple multipath delay time detection method for pi/4 shift QPSK in digital mobile/portable communications" Proc. IEEE Vehicular Technology Conference (VTC'91). 7-12 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Susumu Yoshida: "Simple method of multipath delay difference detection for pi/4-shift QPSK" Electronics Letters. 27. 1027-1028 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Atsuo Hirai: "A simple multipath delay detector for pi/4-shift QPSK" Papers of Tech. Group on RCS, IEICE, 91. 71-77 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Atsuo Hirai: "In-service detection of co-channel interference for pi/4-shift QPSK" Papers of Tech. Group on RCS, IEICE, 91. 7-12 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Kouji Yoshimoto: "Detection of C/I by measuring quadrature-channel detector output for BPSK" Proceedings of Spring National Convention of IEICE. 2-376 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Susumu Yoshida: "In-service monitoring of multipath delay-spread and C/I for QPSK signal" IEEE Vehicular Technology Conference, Denver. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Atsuo Hirai: "Convenient co-channel interference detection methods for digital cellular radio" International Symposium on Antennas and Propagation, Sapporo. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Byong Jin Cho: "A simple multipath delay time detection method for π/4 shift QPSK in digital mobile/portable communications" Proc.IEEE Vehicular Technology Conference,St.Louis(VTC'91). 7-12 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Susumu Yoshida: "Simple method of multipath delay difference detection for π/4-shift QPSK" Electronics Letters. 27. 1027-1028 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 平井 淳生: "π/4シフトQPSK用簡易多重波遅延時間検出装置の試作" 電子情報通信学会技術研究報告RCS91-14. 91. 53-59 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 平井 淳生: "π/4シフトQPSKにおける同一チャネル干渉のインサ-ビス検出法" 電子情報通信学会技術研究報告RCS91-54. 91. 7-12 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Susumu Yoshida: "In-service monitoring of multipath delay-spread and C/I for QPSK signal" Proc.IEEE Vehicular Technology Conference,Denver(VTC'92). (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Atsuo Hirai: "Convenient co-channel interference detection methods for digital cellular radio" Proc.International Symposium on Antennas and Propagation,Sapporo. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Hong Zhou: "Selection Diversity Reception Based on CrossーChannelーInterference Measurement for Digital Mobile Radio" Transaction of Institute of Electronics,Information and Communication Engineers. E73. 658-664 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Susumu Yoshida: "High BitーRate Field Transmission of An AntiーMultipath Modulation Technique PSKーRZ" Proceedings of 40th Vehicular Technology Conference,Oralnd. 527-532 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Susumu Yoshida: "High BitーRate Wireless Data Transmission Experiment within a Building" Proceedings of International Conference on Communication Systems,Singapore,1990. 2. 839-843 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 吉田 進: "耐多重波変復調方式について" 電子情報通信学会論文誌. J73ーBーII. 668-674 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 趙 平珍: "A Simple Multipath Delay Time Detection Method for π/4 Shift QPSK in Digital Mobile/Portable Communications" 電子情報通信学会技術研究報告. 90. 15-20 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Susumu Yoshida: "On the Performance of Viterbi Equalizer in Multipath Fading Channel" Proceeding of 1990 International Symposium on Information Theory and its Applications,Hawaii. 627-630 (1990)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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