空间相关MIMO信道的容量分析

Capacity Analysis of Spatial Correlation MIMO channel

MIMO无线传输系统可以显著提高信道容量,但在实际中,由于相关性的存在会极大影响MIMO系统容量。该文首先引出一个定理,建立空间相关MIMO信道的矩阵模型,在此基础上推导出空间相关MIMO信道遍历容量的上界,得出常量相关模型的信道容量上界以及容量和相关系数的关系,在指数相关模型中得出容量和概率密度的关系,并通过仿真加以验证。

MIMO wireless transmission systems can significantly improve the channel capacity,but in practice,the existence of correlation greatly affects the MIMO system capacity.So in this paper,we firstly quoted a theorem,and established a matrix model of space correlation MIMO channel.Secondly,we derived the upper bound of space correlation MIMO channel ergodic capacity based on the above analysis,and got the upper bound of channel capacity in constant correlation model and the relationship between the capacity and correlation coefficient.Thirdly,we derived the relationship between capacity and probability density in the exponential correlation model.In the end,we proved them by simulations.