空间相关信道下基于线性星座的预编码技术  

Linear Constellation Precoding Over Spatial Correlated Channels

作　　者：李元柳[1] 刘海涛[1] 蒋立辉[1] 

机构地区：[1]中国民航大学,天津300300

出　　处：《通信技术》2008年第7期71-74,共4页Communications Technology

基　　金：中国民航大学科研启动基金资助项目(06QD09X)

摘　　要：文中首先介绍基于MIMO系统的开环预编码技术,重点讨论如何采用线性星座预编码(LCP)方法对多天线系统进行预处理,使多天线系统获得较高的分集增益与编码增益。然后,对LCP预编码系统在空间相关信道下的差错性能作深入分析,分别对弱相关信道与强相关信道两种不同情况下的LCP预编码性能展开详细讨论。最后,用MATLAB软件进行仿真试验,将经过酉星座旋转处理的预编码系统与V-BLAST多天线传输系统作比较,得出不同相关信道下预编码系统的比特差错概率,并验证相应结论。This paper first presents open-loop precoding in MIMO systems, and then focuses on how to construct preprocesses through liner constellationprecoding （LCP） inMIMO systems, thus achieving high diversity gain and coding gain. Then the error performance of LCPprecoding system in spatial correlated channels is analyzed, the theoretic PEP （Pairwise Error Probability） in low and highcorrelated channels are discussed respectively. Finally, computer simulations are carried out with MATLAB, the performance between precoding schemes with unitary constellation rotation and V-BLAST MIMO systems is compared, the bit error probability of precoding systems over different correlated channels is given, and the results has proven the corresponding theoretical findings.

关 键 词：线性星座预编码(LCP) 分集增益 编码增益 空间相关 

分 类 号：TN929.5[电子电信—通信与信息系统]