信道相关性对分集合并接收性能的影响

简介分集接收的主要方式 ,定量分析信道相关性对分集接收性能的影响。特别针对 Rayleigh信道模型中最大比合并和选择合并在各分集支路相关时的性能作了仔细研究 ,给出仿真结果 ,验证各分集支路相关性越小 ,分集效果越好的结论。在最大比合并下 ,当各路平均信噪比与门限相比较小时 ,各分集支路越相关 ,输出信噪比超过门限的概率越大。

The Effect of the Correlation of the Channels to the Perform ance of Diversity Combining

This article simply introduces the primary methods o f diversity combining and quantitatively analyses the effect of the correlation of the channels to the performance of diversity combining.Giving the simulation result of the performance of maximal ratio combining and selection combining in the correlation of Rayleigh fading channels.In maximum ratio combining,when each branch's average SNR is relatively small compared to the threshold,the results show that the probability of the output SNR exceeding the given threshold grows as the correlation coefficient increases.For other conditions,the this probabili ty increases as the correlation coefficient decreasing.