瑞利衰落信道下的网格酉空时调制的研究  

Trellis-coded Unitary Space-Time Modulation over Rayleigh Fading Channel

作　　者：金宁[1] 郭丽娜[1] 

机构地区：[1]中国计量学院信息工程学院,浙江杭州310018

出　　处：《通信技术》2009年第7期18-19,30,共3页Communications Technology

基　　金：浙江省自然科学基金资助项目(Y107650);浙江省科技厅基金资助项目(2008C23022)

摘　　要：酉空时是一种多天线系统信号调制方案,可以在不知道信道状态下进行解调。文中将网格编码与酉空时星座结合运用,性能仿真证明了网格酉空时调制系统非常适合无信道状态信息的无线通信系统,网格编码在一定程度上改进了系统的比特误码率性能。将网格编码下的酉空时调制与未编码的酉空时调制进行对比,结果显示在10-4的比特误码率下可以得到10～15dB的编码增益。Unitary space-time modulation is a kind of MIMO signal modulation scheme in which the channel state information is unknown either in transmitter or receiver. In this paper, the unitary space-time constellation is combined with trellis-coded modulation. Simulation of the performance indicates that the trellis-coded unitary space-time modulation system is well tailored to wireless communication system when there is no channel state information, and could improve the BER performance of the system. The experiment results show that the 10-15dB coding gain at BER 10^-4 could be obtained when compared with uncoded unitary space-time modulation over the same channel.

关 键 词：酉星座 网格码 酉空时调制 

分 类 号：TN911.22[电子电信—通信与信息系统]