相关瑞利衰落信道下空时分组编码性能分析

目前对空时编码的研究大都是基于信道是独立的假设下进行的，然而在实际系统中独立性假设是不成立的。基于此，研究了信道的相关性对空时编码性能的影响。计算机仿真结果表明：由于衰落信道的相关性，系统性能有所下降，且系统性能关于相关系数存在“地板效应”，即相关系数小于某一数值时，对系统性能的影响较小；当大于此值时，系统性能就会急剧下降。

Performance Analysis for Space-Time Coding with Correlated Rayleigh Fading Channel

Researches on the space-time code have been under the assumption of independent fading and perfect channel state information. But in a realistic system, the above assumption is very difficult to be acquired. Based on this, the performance of space-time code under correlated Rayleigh fading channel is studied in this paper. Simulation results show that performance of STBC in the presence of the channel correlation is less than that with ideal condition, but the boundary point exists. When cross-correlation coefficients is more than this value, the performance of STBC deteriorates quickly; less than this value, the performance does slowly.