中文摘要：

针对VBLAST系统，基于QRD-M树搜索思想，提出两种新的检测算法：分支裁减QRD-M（PQRD-M）算法和列表SIC（List-SIC）算法．其中，PQRD-M算法利用QRD-M算法完成信号检测，在检测过程中利用SIC检测结果对搜索树的部分分支进行裁减；List-SIC算法对搜索树前几层采用QRD—M检测，而后对后续层进行SIC检测。复杂度分析和仿真结果表明，两种算法均可以较小的性能损失为代价，有效降低VBLAST信号检测复杂度。

英文摘要：

Two new detection algorithms based on QRD-M Tree-Search algorithm were proposed for VBLAST systems, named pruned QRD-M （PQRD-M） algorithm and list SIC （List-SIC） algorithm. The former estimates signals using QRD-M algorithm, then prunes parts of branches according to the results obtained by SIC in tree searching procedure. While The latter detects the first several layers by QRD-M algorithm and detects the remainder by SIC algorithm. The analysis of complexity and computer simulation shows that two algorithms efficiently reduce computation complexity of VBLAST signal detection at the price of small performance loss.