Successive interference cancellation (SIC) in V-BLAST systems with asynchronous transmission mode  

作　　者：LIN HuaJiong TANG YouXi GUAN Lu SHAO ShiHai 

机构地区：[1]National Key Lab of Communications, University of Electronic Science and Technology of China, Chengdu 610054, China

出　　处：《Science in China(Series F)》2009年第12期2317-2323,共7页中国科学（F辑英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 60832007, 60901018, 60902027);the National High-Tech Research & Development Program of China (Grant No. 2009AA01Z236)

摘　　要：The V-BLAST system with asynchronous transmission mode first proposed by Shao can achieve full diversity only by using a simple linear detection scheme under zero forcing （ZF） criterion; therefore it gives a reasonable tradeoff between complexity and performance. In this paper, we propose two types of successive interference cancellation （SIC） detection schemes for the asynchronous V-BLAST system, one is characterized by applying Mr successive interference cancellators before a maximal ratio combiner （where Mr is the number of receive antennas）, and the other has a maximal ratio combiner before a successive interference cancellator. Since Type Ⅰ consumes more energy of the previously detected signals to recover a signal, Type Ⅱ can offer a better performance and simulations demonstrate its validity.The V-BLAST system with asynchronous transmission mode first proposed by Shao can achieve full diversity only by using a simple linear detection scheme under zero forcing （ZF） criterion; therefore it gives a reasonable tradeoff between complexity and performance. In this paper, we propose two types of successive interference cancellation （SIC） detection schemes for the asynchronous V-BLAST system, one is characterized by applying Mr successive interference cancellators before a maximal ratio combiner （where Mr is the number of receive antennas）, and the other has a maximal ratio combiner before a successive interference cancellator. Since Type Ⅰ consumes more energy of the previously detected signals to recover a signal, Type Ⅱ can offer a better performance and simulations demonstrate its validity.

关 键 词：asynchronous transmission successive interference cancellation （SIC） vertical Bell Labs architecture of layered space-time （V-BLAST） 

分 类 号：TN929.533[电子电信—通信与信息系统] TK423.84[电子电信—信息与通信工程]