DS/CDMA通信系统盲差分自适应接收器  

A Blind Differential Adaptive Receiver for DS/CDMA Communication Systems

作　　者：陈致樑[1] 尹俊勋[1] 吴冬生[2] 

机构地区：[1]华南理工大学电子与通信工程系,广东广州510640 [2]香港大学电机电子工程系

出　　处：《华南理工大学学报（自然科学版）》2002年第8期40-43,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省重点科技攻关项目 (992 2 0 0 3)

摘　　要：针对标准MMSE自适应接收器在频率非选择性衰落信道中的相位滑动和失锁问题 ,提出了一种无需进行训练和信道参数估计的盲差分自适应接收器 ,为自适应地实现该接收器 ,同时提出了一种基于正交分解的盲平均随机梯度 (OrthogonalDecomposi tion_basedBlindAveragedstochasticGradient,ODBAG)算法 .仿真结果表明 ,这种以ODBAG算法实现的盲差分自适应接收器在瑞利 (Rayleigh)衰落信道中 ,误码率性能比传统匹配滤波器 (MatchedFilter ,MF)接收器有显著的提高 。It is known that the standard MMSE receiver will often lose phase lock on the desired signal when the desired signal dips into a deep fade in frequency-nonselective-fading channels. To overcome the above problem, a differential blind adaptive receiver is proposed. In addition,an Orthogonal Decomposition-based Blind Averaged stochastic Gradient (ODBAG) algorithm is presented to implement the blind differential adaptive receiver adaptively. Through computer simulation, it is shown that the proposed receiver provides better bit error rate performance than the match filter receiver and is comparable to the modified MMSE receiver with perfect phase recovery.

关 键 词：DS/CDMA 衰落信道 MMSE接收器 盲检测 

分 类 号：TN91[电子电信—通信与信息系统] TN92[电子电信—信息与通信工程]