用于克服MIMO信道时变性的去相关自举均衡器  

Decorrelating Bootstrap Equalizer for MIMO Channel Time-Variation Suppression

作　　者：刘谦雷[1] 杨绿溪[1] 衡伟[1] 

机构地区：[1]东南大学无线电工程系,江苏南京210096

出　　处：《电子学报》2005年第7期1262-1265,共4页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60496310;No.60272046);国家863高技术研究发展计划(No.2002AA123031);江苏省自然科学基金(No.BK2005061)

摘　　要：本文提出了一种用于克服MIMO信道时变性的自举均衡器.本文首先提出了用于MIMO通信系统的去相关均衡算法,该算法利用通信信源的统计特性实现不同源信号之间的去相关,从而克服了MIMO系统的同信道干扰.接着本文将去相关均衡算法用于时变的MIMO系统,提出了用于克服MIMO信道时变性的自举均衡器.该均衡器仅利用其输入信号来对时变的MIMO系统进行均衡,在仅增加很小的运算量的条件下,大大克服了因信道时变而在常规均衡器输出端产生的同信道干扰,提高了系统的误码性能.仿真实验证实,本文提出的去相关MIMO自举均衡器克服了信道时变的影响,明显改善了接收机的误码性能.This paper proposes a bootstrap equalizer for MIMO charnel time-variation suppression.The decorrelating equalization algorithm for MIMO communication system is proposed firstly, which realizes the decorrelation of the distinct source signals based on the statistics of source signals and therefore suppresses co-channel interference in MIMO system, Then this algorithm is introduced to the time-varying MIMO system and derives the bootstrap equalizer for MIMO channel time-variation suppression,which equalizes the time-varying MIMO channel only by its inputs,and greatly suppresses the time-variation-induced co-channel interferences in ordinary equalizer＇s output and improves the system BER performance at the cost of only a little additional computational complexity. Simulation results demonstrate that the proposed decorrelating MIMO bootstrap equalizer curbs the influence of the channel time-variation and effectively improves the BER performance of the receiver.

关 键 词：自举均衡器 去相关均衡算法 时变MIMO信道 

分 类 号：TN911.5[电子电信—通信与信息系统]