相关瑞利衰落信道上自适应MQAM的性能分析

采用L条支路最大比合并分集接收的相关瑞利衰落信道容量，推导恒定发射功率自适应M进制正交幅度调制的频谱效率，并将它们与独立同分布瑞利衰落信道理论容量进行比较。数值结果阐明相关性和天线设置对瑞利衰落信道容量和自适应M进制正交幅度调制性能的影响。

Closed-form solutions for the correlated Rayleigh fading channel capacity under L-branch Maximum Ratio Combining (MRC) diversity reception are obtained in this paper. The performance of constant-power adaptive M-ary Quadrature Amplitude Modulation (MQAM) schemes over correlated Rayleigh channels under MRC diversity reception is investigated. Closed-form expressions for spectral efficiency of adaptive MQAM assuming perfect channel estimation and negligible time delay are derived. Numerical results that illustrate the effect of correlation and antenna configurations on the correlated Rayleigh fading capacity and spectral efficiency of adaptive MQAM are also presented