• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2003 Fiscal Year Final Research Report Summary

Doppler Spreading Compensation Technique for Mobile Communications based on Space-Domain Interpolated Array Antenna

Research Project

Project/Area Number 13450160
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 情報通信工学
Research InstitutionNara Institute of Science and Technology

Principal Investigator

YAMAMOTO Heiichi  Nara Institute of Science and Technology, Graduate School of Information Science, Professor, 情報科学研究科, 教授 (40243357)

Co-Investigator(Kenkyū-buntansha) SAITO Masato  Nara Institute of Science and Technology, Graduate School of Information Science, Assistant, 情報科学研究科, 助手 (30335476)
CHINEN Ken'ichi  Japan Institute of Science and Technology, Graduate School of Information Science, Associate, 情報科学研究科, 助手 (20304157)
OKADA Minoru  Nara Institute of Science and Technology, Graduate School of Information Science, Associate, 情報科学研究科, 助教授 (10252587)
Project Period (FY) 2001 – 2003
KeywordsOFDM / Orthogonal Frequency Division Multiplex / Doppler Spreading / Array Antenna / Space-Domain Interpolation / Digital Terrestrial Television Broadcasting / Fourth-Generation Mobile Communications / Multipath Fading
Research Abstract

Television Broadcasting, Wireless LAN (Local Ares Network) and a candidate for the next generation mobile communication systems. Although OFDM is robust to time-dispersive multipath channel, it has a major drawback in degradation due to Doppler spreading. In order to solve the Doppler spreading problem, this study proposes an array antenna assisted Doppler spread compensator based on space-domain interpolation. Since the proposed compensator estimates the received signal at the stationary point with respect to the ground, it eliminates the Doppler shift phenomenon during the symbol period. Although this compensation method is effective, it has some problems in implementing it onto cars and trains where the size and shape are strictly limitted. In order to solve the implementation issues, this study first proposes the new array antenna structure which can be attached on the side window of the vehicle. Then this research proposes a new algorithm for estimating the vehicle speed accrate enough for compensating for the Doppler spread. It also proposes a mutual coupling canceller for our array antenna. In our array antenna for Doppler spread compensator, the spacing amongst elements is much narrower than the conventional one. In this case, mutual coupling amangst element affects the performance of the compensator. Our mutual coupling canceller automatically measures the mutual impedance amongst elements and cancels it. Finally, this work proposes a joint diversity and Doppler spread compensator by making efficient use of array antenna. The proposed joint diversity and Doppler spread compensator drastically improves the bit error rate performance in high mobility mobile commujncation systems.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] M.Okada, H.Takayanagi, H.Yamamoto: "Array Antenna Assisted Doppler spread Compensator for OFDM"European Transactions on Telecommunications. 13(5). 507-512 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岡田実, 高橋英晃, 山本平一: "アレーアンテナを用いた伝搬路時変動による地上波デジタル放送の高速移動受信特性改善効果"映像情報メディア学会誌. 56(2). 237-244 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Takayanagi, M.Okada, H.Yamamoto: "Novel fast fading compensator for OFDM using space diversity with space-domain interpolation"Proc.IEEE Vehicular Technology Conference(VTC-Fall). 1(M46). 20-24 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Okada, H.Takayanagi, H.Yamamoto: "Array Antenna Assisted Doppler Spread Compensator for OFDM"Multi-Carrier Spread-Spectrum & Related Topics. 1. 337-344 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Okada, T.Wada, H.Yamamoto: "Array Antenna Assisted Adaptive Modulation in a Fast Fading Channel"Proc.IEEE Vehicular Technology Conference(VTC-Spring). 1. 241-246 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Nagai, M.Okada, M.Saito, H.Yamamoto: "Array Antenna Assisted Doppler Spread Compensator with Vehicle Speed Estimator for OFDM"Multi-Carrier Spread-Spectrum & Related Topics. 1. 299-306 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Okada, H.Takayanagi, H.Yamamoto: "Array Antenna Assisted Doppler Spread Compensator for OFDM"European Transactions on Telecommunicaitons. vol.16,no.5. 507-512 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Okada, H.Takayanagi, H.Yamamoto: "Array-Antenna-Assisted Doppler Spread Compensator for Mobile Reception of Terrestrial Television Broadcasting"The Journal of the Institute of Image Information and Television Engineers. vol.56,no.2. 237-244 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Takayanagi, M.Okada, H.Yamamoto: "Novel Fast Fading Compensator for OFDM Using Space Diversity with Space-Domain Interpolation"Proc.IEEE Vehicular Technology Conference(VTC-Fall). vol.1,no.M46. 20-24 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Okada, H.Takayanagi, H.Yamamoto: "Array Antenna Assisted Doppler Spread Compensator for OFDM"Multi-Carrier Spread-Spectrum & Related Topics. vol.1. 337-344 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Okada, T.Wada, H.Yamamoto: "Array Antenna Assisted Adaptive Modulation in a Fast Fading Channel"Proc.IEEE Vehicular Technology Conference(VTC-Spring). vol.1. 241-246 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Nagai, M.Okada, M.Saito, H.Yamamoto: "Array Antenna Assisted Doppler Spread Compensator with Vehicle Speed Estimator for OFDM"Multi-Carrier Spread-Spectrum & Related Topics. vol.1. 299-306 (2004)

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

URL: 

Published: 2005-04-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi