北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2000, Vol. 23 ›› Issue (1): 51-55.

• 学术论文 • 上一篇    下一篇

一种用于多径CDMA信道的盲多用户检测器

周健,乐光新   

  1. 北京邮电大学电信工程学院, 北京 100876
  • 收稿日期:1999-09-21 出版日期:2000-01-10
  • 作者简介:周健(1973-), 男, 河南扶沟人, 博士生.
  • 基金资助:
    国家科学自然基金资助项目(69872008)

Blind Adaptive Multiuser Detection in Multipath Code Division Multiple Access Channels

ZHOU Jian, YUE Guang-xin   

  1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:1999-09-21 Online:2000-01-10

摘要: 提出了一种基于受限平均输出能量(CMOE)准则的用于多径CDMA信道的盲多用户检测器.与以前提出的盲多用户检测器相比, 它充分利用了两个子空间的特性和结构: 所需用户的扩频码子空间;由接收数据的协方差矩阵估计的信号子空间.仿真结果表明, 该盲多用户检测器具有很强的抗远近效应的能力, 避免了CMOE检测器存在的由于信号表示波形不匹配造成的性能下降问题, 在较高信噪比条件下, 性能大大优于已提出的其它多用户检测器.

关键词: 码分多址联接, 受限平均输出能量, 盲多用户检测器

Abstract: We propose a blind adaptive multiuser detection in multipath CDMA channels based on CMOE criteria. Compared with other multiuser detection, this one take advantage of the structure and character of two subspace : (1) the subspace structure associated with the code of the desired user; (2)the estimated “signal subspace” of the covariance matrix for the observed signals. Simulations state this detection has strong ability against near-far,avoid significant reduction in performance when signature mismatch exists and good performance in the higher SNR conditions.

Key words: code division multiple access, constraint minimum output energy, blind multiuser detection

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