瑞利衰落信道下非独立多重分集接收性能分析

Bit-Error Performance Analysis for Multi-Diversity Reception with Non-Independence in Rayleigh Fading Channel

在瑞利衰落信道中利用分集接收是抗衰落最有效的方法 ,当参与分集的各接收信号彼此独立时能获得最佳性能 ,分集信号之间的相关性会造成误码性能恶化 .现有文献中只给出了二重分集的情况 ,本文对于二重以上分集在分集信号之间具有一定相关性时的误码性能作了理论分析 ,尤其是对实际应用中各分集信号之间的相关性并非均匀的情况进行了分析计算 ,并通过计算机进行了模拟 ,对于几种典型的情况给出了计算结果和误码性能曲线 .

It is an effective method to use diversity reception in Rayleigh channel. The best performance can be obtained when the diversity signals are independent of each other. The correlation between those signals deteriorates the bit-error performance. There is only an analysis for dual diversity in existing literatures. A theoretic analysis on bit-error performance is given when the diversity branches are more than two and correlative with each other. Especially, in the case of the non-uniform correlation between the diversity branches in practical application, the bit-error performance is analyzed and calculated, and the simulation is completed by use of a computer. Finally, some calculated results are given and plotted into curves for several kinds of typical cases.