相关瑞利衰落信道下空时分组编码性能分析  

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

作　　者：王健康[1] 罗涛[1] 乐光新[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《电讯技术》2003年第5期57-60,共4页Telecommunication Engineering

基　　金：国家自然科学基金重大资助项目(90104018);国家自然科学基金资助项目(60172052);"863计划"资助项目(2001AA123016)

摘　　要：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。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.

关 键 词：无线通信 瑞利衰落信道 空时分组码 相关信道 空时编码 

分 类 号：TN911.22[电子电信—通信与信息系统]