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Volume 27 Issue 11
Nov.  2005
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Meng De-xiang, Wu Zhan-ji, Liang Hong-yu, Wu Wei-ling. Diversity Receiving Technique for Synchronous Time Spreading Signal in Time-Varying Fading Channels[J]. Journal of Electronics & Information Technology, 2005, 27(11): 1695-1698.
Citation: Meng De-xiang, Wu Zhan-ji, Liang Hong-yu, Wu Wei-ling. Diversity Receiving Technique for Synchronous Time Spreading Signal in Time-Varying Fading Channels[J]. Journal of Electronics & Information Technology, 2005, 27(11): 1695-1698.

Diversity Receiving Technique for Synchronous Time Spreading Signal in Time-Varying Fading Channels

  • Received Date: 2004-04-12
  • Rev Recd Date: 2005-05-11
  • Publish Date: 2005-11-19
  • By Spectrum Spreading, the multi-path signals can be distinguished and received by RAKE receiver, and spectrum spreading is an efficient way to overcome multi-path fading. Time spreading can implement RAKE diversity receiving in frequency domain. But time spreading comes with serious ISI in fading channels. Synchronous time spreading can overcome the ISI. By channel decomposing, the signal can be received by diversity receiver, so good performance can be achieved. To achieve 10-4 BER performance, the SNR required in time-varying fading channels by our algorithm with 1024 bit spreading length is only 1.4dB more than that in AWGN channels without diversity.
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  • Proakis J. Digital Communications, New York, McGraw Hill, 4th ed., 2001: 822 830, 842-851.[2]Wittneben A. An energy- and bandwidth-efficient data[3]transmission system for time-selective fading channels. in Proc.[4]IEEE GLOBECOM, San Diego, CA., Dec. 1990: 1968-1972.[5]Davies E T J, Linde L P. A novel time spread mechanism to combat flat fading. in COMSIG 97 Proc., Grahamstown, South African, Sept. 1997, 59-62.[6]Swanepoel S A, Linde L P. A time spread technique with interference cancellation for fading mobile communication channels. 1999 IEEE AFRICON, Cape Town, South Africa, Sept.1999: 131-134.[7]Meng D, Wu Z, Liang H, Wu W. A novel time spreading technique for fading mobile channels. in FTC 2003 Proc., Beijing, China, Dec. 2003: 301-304.[8]孟德香,梁红玉,吴伟陵. 基于同步时间扩展处理的信道编码,无线电工程,2004, 34(3): 7-9.[9]Sayeed A M.[J].Aazhang B. Exploiting Doppler diversity in mobile wireless communications. in Proc. 1997 Conf. Information Sciences and Systems (CISS97), Baltimore, MD.1997,:-[10]Lee J S, Miller L E等著, 许希斌, 周世东等译. CDMA系统工程手册(CDMA System Engineering Handbook),北京人民邮电出版社,2001.[11]Andoh H.[J].Sawahashi M, Adachi F. Channel estimation using time multiplexed pilot symbols for coherent Rake combining for DS-CDMA mobile radio. in Proc. PIMRC97, Helsinki, FI, Sept.1997,:-
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