一种基于LTE的改进型V-BLAST算法研究

An Improved V-BLAST Algorithm Based on LTE

信号检测在LTE系统的接收端至关重要,常规V-BLAST算法在进行信号检测时,存在误码传播的情况,造成了性能的下降。本文提出了一种改进型V-BLAST算法,在两方面改善了该算法的性能。首先在最先检测层对要检测的符号进行排序时,采用了一种新的计算概率值的方法,然后根据调制方式保留了K个与判决统计量欧氏距离最近的星座点,其他各层依旧采用常规的V-BLAST算法。仿真结果表明,该算法的性能较常规的V-BLAST算法有了明显改善,该算法已应用于TD-LTE无线综合测试仪表的开发中。

Signal detection is of great importance in LTE system.Conventional V-BLAST algorithm during signal detection has the spread of error,resulting in a decline in performance.This paper presents an improved V-BLAST algorithm,when it is first detected,this paper uses a new method which calculates the value of probability to make the symbols to be detected in order,and this layer retains the K Euclidean constellation points which are nearest to statistics judgment according to the modulate mode,and the other layers are still using V-BLAST algorithm.Compared with the conventional algorithm,the improved one has much better performance,which has been applied to TD-LTE wireless integrated test instrument.