Transmit correlation effect on SIC-ZF receiver for V-BLAST system

作     者：GUO HaiYou ZHOU ZhiGang HU HongLin 

作者机构：Key Laboratory of Wireless Sensor Network & Communication Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China Shanghai Research Center for Wireless Communications Shanghai 200335 China 

出 版 物：《Science in China(Series F)》 (中国科学（F辑英文版）)

年 卷 期：2009年第52卷第12期

页      面：2290-2295页

核心收录：

学科分类：0810[工学-信息与通信工程] 080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 081001[工学-通信与信息系统] 

基　　金：Supported in part by Shanghai Research Center for Wireless Communications (SHRCWC) cooperative project in part by the Ministry of Science and Technology of China (Grant Nos. 2008DFA12190, 2008DFA12090) 

主　　题：error propagation （EP） successive interference cancellation （SIC） transmit correlation V-BLAST zero forcing （ZF） 

摘      要：It has been shown that transmit correlation causes a signal-to-noise ratio （SNR） loss in the zero forcing （ZF） receiver for V-BLAST （Vertical Bell LAbs LAyered Space-Time） system. In this paper, we investigate the transmit correlation effect on the ZF receiver with successive interference cancellation （SIC）. We show that such an unfavorable condition leads to twofold effects on the performance degradation. In addition to the immediate SNR loss, the transmit correlation can increase the propagation factor to spread decision error significantly. These two effects are evaluated analytically. We derive the probability density function （pdf） of the effective SNR at each decoded stream, and hence accurately quantify the SNR loss. We also calculate the decision error propagation factor in terms of its second moment. In particular, we show that transmit correlation can cause a stable component of error propagation which does not decline during the SIC procedure. Finally, we conduct the simulation to verify the analytical results.