基于差分空时分组码的DS-CDMA系统下行MOE自适应接收机  

Adaptive MOE Receiver for DS-CDMA Downlink with Space-time Block Differential Coding

作　　者：陈建峰[1] 张贤达[2] 黄辉[1] 

机构地区：[1]西安电子科技大学雷达信号处理实验室,西安710071 [2]清华大学自动化系,北京100084

出　　处：《信号处理》2004年第2期157-161,共5页Journal of Signal Processing

基　　金：国家自然科学基金(No.60072043)资助

摘　　要：DS—CDMA下行链路的性能受到信道衰落和多址干扰的影响。本文提出了一种MOE多用户检测技术与差分空时分组码相结合的新方法。该方法不需要信道估计,并可在克服信道衰落的同时达到抑制多址干扰的目的。为适应无线信道的时变特性,基于阵列处理中广泛应用的分支干扰相消器结构,我们给出了该方法的RLS自适应实现形式。计算机仿真结果证实了本文提出方法的优良性能。The performance of downlink CDMA systems is influenced by channel fading and multi-access interference. This paper proposes a novel method for MOE multi-user detection in conjunction with space-time block differential coding. The new method does not require channel estimation, and it can combat channel fading and multi-access interference. In order to track time-varying characteristic of wireless channel, an adaptive RLS implementation of this method is presented by using partioned linear interface canceller. Finally, its performances are confirmed by computer simulations.

关 键 词：差分检测 空时码 多用户检测 发射分集 DS-CDMA 信道估计 无线通信 行MOE自适应接收机 

分 类 号：TN914.53[电子电信—通信与信息系统]