一种基于功率分配和天线选择算法的V-BLAST系统设计

将天线选择算法引入采用功率分配算法的V—BLAST（vertical bell laboratories layered space．time）系统能有效改善BER的性能，从而降低错误传播对系统的影响．在此，以最小化向量错误概率为目标，在一种发射端有2根天线的最优功率分配V—BLAST系统的基础上引入发射天线选择技术（算法），将该系统从发射端有2根天线的V-BLAST系统扩展到通用的V-BLAST系统中．仿真结果表明，此方案无论是在各层BER性能上还是在向量错误概率上都优于原系统的无天线选择方案，并且随着系统向量错误概率的进一步降低，有天线选择的方案相对于无天线选择的方案在性能上会有进一步的提高.

A design of V-BLAST system based on power allocation and antenna selection algorithm

Incorporation of antenna selection algorithm into power allocation algorithm in V-BLAST system can effectively improve the BER performance and reduce the influence of error propagation on the system. In this article, with the minimal probability as a criterion, the antenna selection algorithm is introduced into the V-BLAST system with optimal power allocation and two antennae at emitting end. Then this system is extended into a universal V-BLAST system. Simulation results indicate that this approach has better performance in BER and vector error probability than the oroginal system without antenna selection. Moreover, the performance will tend to be better when the vector error probability further decreases.