衰落信道下两发送天线MIMO系统V-BLAST算法研究

衰落信道下两发送天线MIMO系统V-BLAST算法研究

内容简介：对两发送天线MIMO系统在相关瑞利和莱斯信道下V-BLAST检测算法的性能进行了分析,推导出最优和固定检测两种方案中第一步和第二步的误码率.相对于独立同分布瑞利信道,考察了相关瑞利信道和莱斯信道对接收信噪比的影响;相对于固定检测方案,讨论了最优检测算法对信噪比的提升.理论分析和仿真结果表明,瑞利信道相关性或莱斯信道的直达波分量会减弱最优检测方案对信噪比的提升.

Abstract：The performance of vertical Bell Labs Space-Time (V-BLAST) algorithms for the MIMO systems with two transmit antennas is analyzed over correlated-Rayleigh channel and Rician channel.We derive the analytical bit error rates (BERs) of the first and second detection steps for both optimal and fixed detection ordering schemes. We also investigate the signal-to-noise ratio(SNR) degradation of the detection steps for correlated-Rayleigh and Rician channels over an independent and identically distributed (I.I.d.) Rayleigh channel.Afterwards,the effect of optimal ordering on the SNR improvement over fixed detection ordering has been discussed. Results have shown that the correlation or line-of-sight component reduce the SNR improvement of optimal ordering in the first step, whereas the correlation have no effect on the performance of the second step for a correlated-Rayleigh channel.

作者：许荣涛, 钟章队, 陈建谋,

关键词：多输入输出天线系统, 垂直空时结构, 最优检测顺序, 复Wishart分布,