紧耦合MIMO系统SVA室内衰落信道容量分析

Analysis of the SVA indoor fading channel's capacity in tightly coupled MIMO systems

近年来MIMO系统的天线日渐趋于小型化,随之而来的紧耦合效应成为影响信道容量的主要因素。首先介绍了SVA室内衰落信道模型的建模方法,其次给出了天线间的耦合效应产生的原理,最后将耦合效应带入信道模型中,并且分析其在丰富的多径情况下不同天线间距对信道容量的影响。仿真结果显示天线耦合效应会导致信道容量减少,并且天线间距越短,耦合效应对信道容量的影响越大。

In recent years, the antennas of MIMO system tends to be miniaturized, and the coupling effect becomes the main factor that affects the channel capacity. In this paper, the method of modeling the indoor SVA fading channel model is introduced firstly. Secondly, the principle of the coupling effect is presented. Finally, the coupling effect is brought into the channel model, and the effect of different antenna spacing on the channel capacity is analyzed under the multipath condition. Simulation results show that the coupling effect leads to the decrease of the channel capacity, and the shorter the antenna spacing, the greater the effect of the coupling effect on the channel capacity.