基于QR分解的循环迭代检测算法  

Iterative cycle detection algorithm based on QR decomposition

作　　者：刘海涛[1] 孙宇昊[1] 李冬霞[2] 李道本[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876 [2]中国民用航空学院通信工程系,天津300300

出　　处：《电波科学学报》2005年第5期575-579,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(69931050)

摘　　要：理论和实践研究表明垂直分层空时码可显著提高多天线系统的传输容量。为克服垂直分层空时码QR分解检测算法不能充分利用多天线分集增益信息的缺点,提出循环迭代QR分解检测算法。新算法在QR分解检测算法基础以循环迭代方式利用多天线系统提供分集增益信息,从而改善检测器性能。分析和仿真表明循环迭代QR分解检测算法复杂度是连续干扰消除算法的五分之一;在对称系统中(接收天线和发送天线数相等),新算法性能优于连续干扰消除算法。V-BLAST （Vertically-Layered Bell Laboratories Layered Space-Time） is a mu comp ltiple transmit and receive antenna system that provides very high capacity aring to single antenna systems. Recently, a number of detection schemes have been proposed for V-BLAST. However these schemes did not fully use the diversity provided by multi-antenna system. In this paper, a new algorithm, which can iteratively utilize diversity information of V-BLAST, is presented. Comparisons are done with the V-BLAST Successive Interference Cancellation （OSIC）, the proposed algorithm is five times less complex than OSIC, and significant performance improvement can be obtained for symmetric systems, where there is an equal number of transmit and receive antennas.

关 键 词：垂直分层空时码 MIMO系统 QR分解检测 

分 类 号：TN92[电子电信—通信与信息系统]