一种MIMO复合信道容量研究

为了解决信道利用率的问题,结合MIMO信道相关模型、路径损耗、阴影衰落以及Rayleigh衰落,提出了一种复合信道模型。通过对信道容量的仿真分析表明,天线空间相关性对信道容量的影响会随天线数量的增加而增大,同时路径损耗与阴影衰落会极大削弱分集增益,导致在发送距离较远时MIMO系统失效。通过容量分析,证明该模型能在实际系统设计中,为天线阵列与传输距离的选取提供数据依据。

Research of MIMO composite channel capacity

In order to improve the channel efficiency, a composite MIMO channel model is proposed by combining the correlated channel model, path loss, shadowing and Rayleigh fading. According to the simulation of channel capacity, the impact of spatial relativity on channel capacity would rise with the number of antennas; at the same time, the path loss and shadowing, which would extremely weaken diversity gain when the propagation distance is far enough, would cause the MIMO invalidation. Through capacity analysis, it is proved that this model could provide data basis for selecting antenna array and transmission distance in practical system design.