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1999 Fiscal Year Final Research Report Summary

Development of Sub-nano second Indoor Radio Delay Profile Measurement Technique

Research Project

Project/Area Number 10650384
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 情報通信工学
Research InstitutionKyoto Sangyo University

Principal Investigator

TAKEUCHU Tsutomu  Kyoto Sangyo University, Professor, 工学部, 教授 (20154974)

Project Period (FY) 1998 – 1999
Keywordsmobile communicaitions / multipath propagation / Delay Profile / sub-nanao second / Indoor radio propagation / Digital radio communication / dalays
Research Abstract

This research work has been done for the realization of ultra high resolution delay measurement (sub-nano second) for indoor radio environment which enables the high speed access in wireless LAN. However it could not attain the measuring equipment due to the difficulties in designing the logic circuit for Maximal-length code generator. The researcher will continue the research work until the accomplishment of the measuring equipment and the measurement in indoor radio environment. During the research work, the possibility of the anti-symmetric M-sequence is revealed without the loss of amplitude dynamic range in correlation output.
The digital radio link simulation in indoor radio environment will be one of a target of this research work. A wireless LAN system utilizing the delay robust modulation scheme PSK-RZ and an artificial time-varying fading, Active Fading, has been proposed by the researcher and its performance has been estimated by computer simulation. A newly installed parallel virtual machine, equipped with 32 Pentium II 450MHz CPU, enables the detailed computer simulation in the whole room with the size of 15×10×3m. The results show that the proposed method can attain the bit error rate less than 1×10ィイD1-5ィエD1 in the whole room whereas the conventional method cannot. This result is obtained by the computer simulation calculating the time-varying signals with time dispersion characteristics based on complex delay profiles computed by three dimensional ray-tracing radio propagation. The result of this work, such as fine delay characteristics of indoor radio environment, will be expected to improve the computer simulation by revealing the detailed mechanism of indoor radio propagation characteristics.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] T. Takeuchi and S. Ikeda: "Performance Evaluation of PSK-RZ with Active Fading in an Indoor Radio Wireless LAN Environment"Proceedings of 1999 IEEE 49^<th> Vehicular Technology Conference. 2209-2213 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 池田 智 竹内 勉: "OFDM-RZ方式に関する一検討 ―100Mb/s無線LANの実現をめざして―"電子情報通信学会1999年総合大会講演論文集. 通信1. B-5-24 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 竹内 勉 池田 智: "Ptolemyと仮想並列計算機による屋内ディジタル伝送シミュレーション ―Active Fading と耐多重波変調方式―"2000年電子情報通信学会総合大会講演論文集. 通信1. SB1-3 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Takeuchi and S.Iked: "Performance Evaluation of PSK-RZ with Active Fading in an Indoor Radio Wireless LAN Environment"Proceedings of 1999 IEEE 9th Vehicular Technology Conference. 2209-2213 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Ikeda and T.takeuchi: "A Stud on OFDM-RZ―Towards the Realization of 100Mb/s Wireless LAN―"proceedings of 19999 IEICE Spring Conference, Communication. B-52(in Japanese).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Takeuchi and S/Olleda: "Indoor Digital Radio system Simulation by Ptolemy and a Paralle Virtual Machine―Active Fading and Delay Robust Modulation Scheme―"Proceedings of 2000 IEICE Spring Conference, Communication. SB1-3(in Japanese).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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