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The analyses on indoor wireless environments and the transmission performance of giga-bit wireless LAN

Research Project

Project/Area Number 15560342
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Communication/Network engineering
Research InstitutionKyoto Sangyo University

Principal Investigator

TAKEUCHI Tsutomu  Kyoto Sangyo University, Faculty of Engineering, Professor, 工学部, 教授 (20154974)

Co-Investigator(Kenkyū-buntansha) ZHOU Hong  Osaka Institute of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80268226)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2004: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2003: ¥2,100,000 (Direct Cost: ¥2,100,000)
Keywordswireless LAN / UWB / channel sounder / multipath propagation / OFDM / mobile communication / giga-bit
Research Abstract

This research work has been done for the realization of Giga-bit/s wireless LAN by both analyses on wireless propagation and communication system. Following results were obtained.
1. Indoor wireless propagation measurements and wireless LAN simulator
Indoor wireless propagation measurements have been done by using the ultra wide-band channel sounder with newly added DOA measuring function. It found many strong specular rays caused by the metallic objects and so many weak scattering rays. By utilizing the measured delay profiles, the indoor propagation channel simulator has been studied and used for the performance investigation of MIMO diversity system. The diversity system showed the performance improvement even in the static environment.
2. Studies on Giga-bit/s communication system for wireless LAN
A simple channel performance estimation method based on the viterbi decoding metrics has been proposed and evaluated by computer simulations with the valuable results. Based on this new chann … More el estimation method, two basic adaptive rate communication systems have been studied. The first one with adaptive modulation schemes has realized a fast average transmission rate with complex hardware architecture, however, the second one with adaptive frequency diversity branch number system has obtained a relatively small scale hardware with small loss of performance.
In the next, a high-precision time-delay difference estimation method based on the in-phase channel distortion detector has been proposed and studied. And its application to the adaptive variable guard-interval (GI) OFDM system has been studied. The simulation result showed that the system has realized the high transmission performance and efficiency compared with conventional fixed GI system.
And furthermore, a MEMO-OFDM system utilizing the sub-carrier channel orthogonal property has been studied to show its system simplicity and the comparable transmission performance compared with conventional space-time coding MIMO system. The proposed system is expected to cut the power consumption in big amount. Less

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (16 results)

All 2005 2004 2003 Other

All Journal Article (11 results) Publications (5 results)

  • [Journal Article] π/4シフトQPSK移動通信システムにおけるSOM型ニューラルネットによる線形ひずみ補償法2005

    • Author(s)
      河村 健
    • Journal Title

      電子情報通信学会技術研究報告

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] デジタル通信におけるニューラルネットによる線形ひずみ補償法2004

    • Author(s)
      周 虹
    • Journal Title

      電子情報通信学会技術研究報告 WBS2003-137

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 適応伝送速度DAPSK-COFDM移動通信システムに関する一検討2004

    • Author(s)
      矢野 雄士
    • Journal Title

      2004年電子情報通信学会総合大会予稿集 B-5-57

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Comparison of Code Combining and MRC Diversity Reception in Mobile Communications2004

    • Author(s)
      Hong ZHOU
    • Journal Title

      Proceedings of IEEE Wireless Communications and Networking Conference 2004

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] An Ultra Wide Band Channel Sounder for Indoor Wireless Propagation Environments2004

    • Author(s)
      Tsutomu Takeuchi
    • Journal Title

      IEICE Transaction on Electronics E87-C・9

      Pages: 1467-1468

    • NAID

      110003215031

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Linear Distortion Compensation Based on SOM for Digital Wireless Communications2004

    • Author(s)
      Hong Zhou
    • Journal Title

      Proceedings of International Symposium on Communications and Information Technologies 2004

      Pages: 1155-1159

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] An Ultra Wide Band Channel Sounder for Indoor Wireless Propagation Environments2004

    • Author(s)
      Tsutomu Takeuchi
    • Journal Title

      IEICE Transaction on Electronics E87-C-9

      Pages: 1467-1468

    • NAID

      110003215031

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Linear Distortion Compensation Based on SOM for Digital Wireless Communications2004

    • Author(s)
      Hong Zhou
    • Journal Title

      Proceedings of International Symposium on Communications and Information Technologies

      Pages: 1155-1159

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Neutral Network for Linear Distortion Compensation in Digital Communications2003

    • Author(s)
      Hong ZHOU
    • Journal Title

      Proceedings of Seventh International Symposium on Signal Processing and Its Applications

      Pages: 297-300

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Ultra Wide Band Channel Sounding for Indoor Wireless Propagation Environments2003

    • Author(s)
      Tsutomu Takeuchi
    • Journal Title

      Proceedings of 2003 IEEE Topical Conference on Wireless communication Technology and NSF Wireless Grantees Workshop

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Neural Network for Linear Distortion Compensation in Digital Communications2003

    • Author(s)
      Hong ZHOU
    • Journal Title

      Proceedings of Seventh International Symposium on Signal Processing and Its Applications

      Pages: 297-300

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Hong ZHOU: "Neural Network for Linear Distortion Compensation in Digital Communications"Proceedings of Seventh International Symposium on Signal Processing and Its Applications. 297-300 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Tsutomu Takeuchi: "Ultra Wide Band Channel Sounding for Indoor Wireless Propagation Environments"Proceedings of 2003 IEEE Topical Conference on Wireless Communication Technology and NSF Wireless Grantees Workshop. (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 周 虹: "デジタル通信におけるニューラルネットによる線形ひずみ補償法"電子情報通信学会技術研究報告. WBS2003-137. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 矢野 雄士: "適応伝送速度DAPSK-COFDM移動通信システムに関する一検討"2004年電子情報通信学会総合大会予稿集. B-5-57. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hong ZHOU: "Comparison of Code Combining and MRC Diversity Reception in Mobile Communications"Proceedings of IEEE Wireless Communications and Networking Conference 2004. (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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