一种用于多径CDMA信道的盲多用户检测器

Blind Adaptive Multiuser Detection in Multipath Code Division Multiple Access Channels

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 。

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.