基于全波分析方法的MIMO信道空间相关性分析

Analysis on Spatial Correlation Performance of MIMO Channels Based on EM Full Wave Method

针对现有多输入多输出(MIMO)信道空间相关性分析方法的不足,提出了一种新的分析方法:对包含收发天线在内的无线散射信道模型进行全波分析,利用矩量法求解天线电流分布,并由接收天线的电流分布直接推导出MIMO信道接收端的空间包络相关系数.在建模过程中,提出根据能量比的原则确定信道模型参数.仿真结果表明,与现有基于来波角谱分布求解相关系数的方法相比,该方法不仅与之有较好的相容性,而且无需假设来波角谱分布.

A new method was presented to evaluate the spatial correlation performance of multiple-input multiple-output （MIMO） channels, which is based on an electromagnetic full wave algorithm. The correlation coefficient is derived from the current distributions on antennas which are calculated by moment methods so that the prior knowledge of the power azimuth spectrum is no longer necessary. Finally, a new parameter, the power proportion, is used to set the model. The numerical results indicate that the new method agrees fairly well with the one based on the power azimuth spectrum （PAS）, which can be regarded as a fundament to deeply expand the study of MIMO scattering wireless channel model.