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Acquisition of a Spread Spectrum Signal with Frequency Offset

Research Project

Project/Area Number 07805037
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 InstitutionNagoya University

Principal Investigator

KATAYAMA Masaaki  Nagoya University, School of Engineering, Associate Professor., 工学部, 助教授 (60185816)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1995: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsLow Earth-Orbital Satellite System / Spread Spectrum Sommunication / Carrier Frequency Offset / Acquisition of a Spreading Sequence / Estimation of the Carrier Frequency / FFT / Divided Matched Filter / Signal Processing / スペクトル拡散通信システム / 高速同期捕捉 / M値スペクトル拡散通信方式
Research Abstract

In this research, initial acquisition of a Spread Spectrum (SS) signal under large frequency offset is investigated. The following two schemes are proposed and evaluated. The schemes and main results are as follows.
1.Divide Matched Filter Method
In this method, the spreading sequence is divied into a set of sub-sequences and a bank of matched filters, which are corresponding to the sub-sequences, are prepared in the initial acquisition circuit. The circuit then stores the output of the matched filters, and by searching the outputs, it finds the timing, or the phase, of the spreading sequence of the received signal. The results of performance evaluation show that this proposed scheme outperform conventional scheme with a non-divided filter in mean acquisition time under large frequency offset.
2. Frequency-Time Domains Method
When the frequency offset is very large, even the scheme proposed above can not provide quick synchronization. For this condition, the employment of a set of FFT after the bank of spreading codes with different time-offset is proposed. In this method, the frequency and timing of the received SS signal at the same time. As the results, the advantage of this scheme is shown with the selection of some parameters.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 水谷 昌展: "搬送波周波数偏差を伴うスペクトル拡散信号のパラレル同期捕捉" 電子情報通信学会誌(A). J79-A. 98-104 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 奥田 慎治: "搬送波周波数偏差を伴うスペクトル拡散信号の周波数・拡散系列同期捕捉" 電子情報通信学会誌(A). J79-A. 1725-1733 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S. Okuda: "A New Block Demodulator for DS/SS Signal with Carrier Frequency Offset" Proc. of the IEEE Personal Indoor and Mobile Radio Communications Conference. 203-207 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 石津 美帆子: "チップ同期が不完全な場合における分割MFを用いた拡散信号の初期同期捕捉特性" 電気関係学会東海支部連合大会講演論文集. 269- (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Okuda, M.Katayama, T.Yamazato, A.Ogawa: ""New Acquisition Scheme fot the DS/SS Signal with Large Carrier Frequency Offset"" IEICE Transactions. Vol.J79-A,No.10. 1725-1733 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Mizutani, M.Katayama, T.Yamazato, A.Ogawa: ""Parallel Acquisition of a Direct-Sequence Spread-Spectrum Signal with Frequency Offset"" IEICE Transactions. Vol.J79-A,No.1. 98-104 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Okuda, M.Katayama, T.Yamazato and A.Ogawa: ""A New Block Demodulator for DS/SS Signal with Carrier Frequency Offset"" 60th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. 203-207 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Ishizu, S.Okuda, M.Katayama, T.Yamazato and A.Ogawa: ""Performance of Divided Matched Filter Method for the Initial Acquisition of the Spread Spectrum Signal with Frequency Offset Under the Chip Timing Ambiguity"" Record of 1995 Tokai-Section Joint Conference of the Six Institutes of Electrical and Related Engineers. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 水谷 昌展: "搬送波周波数偏差を伴うスペクトル拡散信号のパラレル同期捕捉" 電子情報通信学会誌(A). J79-A. 98-104 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 奥田 慎治: "搬送波周波数偏差を伴うスペクトル拡散信号の周波数・拡散系列同期捕捉" 電子情報通信学会誌(A). J79-A. 1725-1733 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] S.Okuda: "A New Block Demodulator for DS/SS Signal with Carrier Frequency Offset" Proc.of the IEEE Personal Indoor and Mobile Radio Communications Conference. 203-207 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 石津 美帆子: "チップ同期が不完全な場合における分割MFを用いた拡散信号の初期同期捕捉特性" 電気関係学会東海支部連合大会講演論文集. 269- (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 水谷 昌展: "搬送波周波数偏差を伴うスペクトル拡散信号のパラレル同期捕捉(掲載予定)" 電子情報通信学会論文誌(A). J79-A. 98-104 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Wada: "Non-coherent Reception of M-ary Spread-Spectrum Signals in the Presence of Carrier" 電子情報通信学会論文誌(E). J78-A. 1102-1108 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] S.Okuda: "A New Block Demodulator for DS/SS Signal with Carrier Frequency Offset" Proc.of the Proc.of the IEEE Personal Indoor Mobile Radio Communicaiton Conference. 203-207 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 伊勢 誠: "低軌道衛星通信システムにおけるドップラーシフトを考慮した搬送波周波数推定方式" 電子情報通信学会技研報告. SST95-60. 1-6 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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