关键词: 多输入多输出系统, 垂直分层空时码, 迭代检测, 软信息

Abstract:

The optimal maximum likelihood(ML)detection of vertical-bell laboratory layered space-time codes (V-BLAST)is dificult to implement and the performances of conventional detection algorithms are limited by error propagation.In order to solve these problems,an iterative detection(ID)method for V-BLAST codes is proposed,in which the soft inform ation of the signals received by multiple antennas is iterated to eliminate the interference.By the proposed method,the effect caused by the error propagation is efficaciously mitigated.Simulated resuhs indicate that the ID method is of quicker convergence speed and better detection perform ance,as compared with the conventional ZF-DFE algorithm.Moreover.it is of a detection perform ance similar to the ML method in low SNR (Signal Noise Ratio)region.

Key words: multi-input multi-output system, vertical-bell laboratory layered space-time codes, iterative detection, soft jnformation