非同步扩频系统中空时分组码的阵列处理  

Array Processing Based on Space - time Block Codes for Interference Cancellation in Asynchronous DS - CDMA Systems

作　　者：单红梅[1] 胡光锐[1] 李正权[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《通信技术》2003年第7期11-13,共3页Communications Technology

基　　金：国家自然科学基金(项目编号60172018)

摘　　要：针对非同步DS-CDMA系统提出了一种基于空时分组码的阵列处理干扰对消的技术。通过对发射信号进行空时分组编码,可以使发射信号在瑞利衰落信道中传输时信息不会畸变,并取得最大分集增益和码增益。利用空时分组码的性质有效抑制干扰的同时,大大简化了空时分组码的解码。仿真结果表明,这里提出的方法与传统的抑制干扰的方法相比具有更低的误比特率,并且有更快的解码速率。In this paper, we present a array processing method based on space time block codes (STBC) for interference cancellation in asynchronous direct - sequence/code - division multiple - access (DS/CDMA) systems. Space - time block coding can combat channel fading effectively during signal propagation. STBC has been proposed as coding technique to improve system performance with maximum diversity gains and code gains. Space - time block decoding can be considerably simply. The simulation shows our proposed method compared with the conventional interference cancellation method have lower bit error rate and rapid decoding rate.

关 键 词：直接序列-码分多址 干扰抑制 空时分组码 阵列处理 

分 类 号：TN91[电子电信—通信与信息系统]