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异步带限DS-CDMA系统在多径衰落信道下的子空间时延序贯估计算法

程云鹏 蔡跃明

程云鹏, 蔡跃明. 异步带限DS-CDMA系统在多径衰落信道下的子空间时延序贯估计算法[J]. 电子与信息学报, 2001, 23(11): 1195-1203.
引用本文: 程云鹏, 蔡跃明. 异步带限DS-CDMA系统在多径衰落信道下的子空间时延序贯估计算法[J]. 电子与信息学报, 2001, 23(11): 1195-1203.
Cheng Yunpeng, Cai Yueming. SUBSPACE-BASED TIME DELAY SEQUENTIAL ESTIMATION ALGORITHM FOR ASYNCHRONOUS BANDLIMITED DS-CDMA SYSTEMS IN MULTIPATH FADING CHANNELS[J]. Journal of Electronics & Information Technology, 2001, 23(11): 1195-1203.
Citation: Cheng Yunpeng, Cai Yueming. SUBSPACE-BASED TIME DELAY SEQUENTIAL ESTIMATION ALGORITHM FOR ASYNCHRONOUS BANDLIMITED DS-CDMA SYSTEMS IN MULTIPATH FADING CHANNELS[J]. Journal of Electronics & Information Technology, 2001, 23(11): 1195-1203.

异步带限DS-CDMA系统在多径衰落信道下的子空间时延序贯估计算法

SUBSPACE-BASED TIME DELAY SEQUENTIAL ESTIMATION ALGORITHM FOR ASYNCHRONOUS BANDLIMITED DS-CDMA SYSTEMS IN MULTIPATH FADING CHANNELS

  • 摘要: 该文提出了适合于异步DS-CDMA系统在多径衰落信道下的子空间时延序贯估计算法,称为MUSIC-SEA算法。该算法引入了序贯估计思想,将已估时延信息融入后续时延估计过程中,整个时延估计过程为:首先估计噪声子空间,然后依次对每个时延进行粗略估计和精确搜索。给出了MUSIC-SEA算法的迭代执行方法,并进行了性能分析和计算机仿真。结果表明,MUSIC-SEA算法能有效除去多径间的相互影响,提高时延正确估计概率和时延估计精度。
  • E.G. Strom, S. Parkvall, S. L. Miller, et al., Propagation delay estimation in asynchronous DS-CDMA systems, IEEE Trans. on Commun., 1996, COM-44(1), 84-93.[2]T. Ostman, S. Parkvall, B. Ottersten, Analysis of an improved MUSIC algorithm for estimation of time delays in asynchronous DS-CDMA systems, available by URL:http:∥www.kth.se/s3/signal/ INDEX.html.[3]T. Ostman, B. Ottersten, Near far robust time delay estimation in asynchronous bandlimited DS-CDMA systems, available by URL:http:∥ www.kth.se/s3/signal/INDEX.html.[4]Cheng Yunpeng, Cai Yuemin, User recognition and time delay estimation with near far robustfor asynchronous bandlimited DS-CDMA systems, in Fifth Asia-Pacific Conference on Communications and Fourth Optoelectronic and Communications Conference(APCC/OECC99), Bei.jing,1999, 508-512.[5]E.G. Strom, S. Parkvall, S. L. Miller, et al., DS-CDMA synchronization in time varying fadingchannels, IEEE J.on SAC, 1996, SAC-14(10), 1636-1642.[6]S.K. Oh, C. K. Un, A sequential estimation approach for performance improvement ofeigenstructure-based methods in array processing, IEEE Trans. on SP, 1993, SP-41(1), 457-463.[7]M. Bhandary, Detection of the number of signals in the presence of white noise in decentralizedprocessing, IEEE Trans. on SP, 1998, SP-46(3), 800-803.[8]陈宝林,著,最优化理论与算法,北京,北京大学出版社,1989,第五章[9]T. Ostman, On the bounds of performance in communication system, available bvURL:http:∥www.kth.se/s3/signal/INDEX.html.
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出版历程
  • 收稿日期:  1999-11-01
  • 修回日期:  2000-05-30
  • 刊出日期:  2001-11-19

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