正交空时分组码在瑞利衰落信道下的性能  

Performance of Orthogonal Space-Time Block Codes over Rayleigh Fading Channels

作　　者：张振川[1] 刘永智[1] 李喆[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2008年第5期669-672,共4页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2006AA701428)

摘　　要：基于典型的多输入-多输出无线通信系统下的正交空时分组码信道模型,推导了瑞利衰落信道下正交空时分组码的瞬时接收信噪比和抗噪声性能的一般表达式,并用Simulink仿真工具,对在不同调制方式下几种STBC系统的误码率性能进行了仿真与结果比较分析.仿真结果表明,接收天线数目一定时,正交空时分组码的性能随着发射天线数的增加而得到改善,并且随着发射天线数目的增加,改善的程度越来越小.分析结果还表明了系统带宽利用率和抗噪声性能之间的互补关系.Based on the typical channel model of STBC in MIMO （multiple-in, multiple-out） wireless communication channels, a general expression of instantaneously received signal-noise ratio and anti-noise performance of OSTBC （orthogonal space-time block codes） over Rayleigh fading channel is deduced. A simulation was conducted using Simulink, as a result, the BER（biterror rate） of several STBC systems modulated differently are comparatively analyzed. The results showed that when the number of receiving antennas is fixed, the performance of OSTBC is improved with the increasing number of transmitting antennas, and the more the number of transmitting antennas, the less the improvement. It is also revealed that the bandwidth utilization ratio is in complementary relation to anti-noise performance.

关 键 词：信道编码 空时分组码 分集技术 瑞利衰落 计算机仿真 

分 类 号：TN911[电子电信—通信与信息系统]