摘要
联合SIC和QRD-M树搜索,提出一种低复杂度的VBLAST检测算法:SQRM-SIC算法。该算法基于信道矩阵的排序QR分解(SQRD),首先对搜索树前几层采用QRD-M检测,然后对后续层进行SIC检测,获得了检测信号列表。在所提算法基础上,通过修改SQRD算法中的排序规则,得到MSQRM-SIC算法。复杂度分析和性能仿真表明,通过调整参数,SQRM-SIC算法和MSQRM-SIC算法都可获得较好的复杂度和性能折衷。其中,后者性能明显优于前者;且后者与QRDM算法相比,可以有效降低复杂度,而基本不损失性能。
Joint SIC and QRD-M (SQRM-SIC) algorithm is proposed for VBLAST system as a low complexity detection algo- rithm. The proposed algorithm firstly decomposes channel matrix using sorted QR decomposition ( SQRD), then detects the first several layers by QRD-M and the remainder by SIC ,finally obtains detected signal list. By changing the sorting rule of SQRD ,a modified SQRM- SIC (MSQRD-SIC) algorithm is presented. The analysis of complexity and computer simulation demonstrates that two algorithms achieve good compromise between complexity and detection performance by adjusting some specific parameters. Furthermore ,the MSQRM-SIC al- gorithm significantly improves detection performance compared with the SQRM-SIC algorithm, and efficiently reduces detection complexity without obvious performance loss compared with QRD-M algorithm.
出处
《信号处理》
CSCD
北大核心
2009年第5期746-750,共5页
Journal of Signal Processing
关键词
VBLAST系统
连续干扰抵消(SIC)
QRD-M树搜索
排序QR分解
VBLAST systems
serial interference cancellation (SIC)
tree search based on QR decomposition and M algorithm
sorted QR decomposition