准静态Rician衰落信道中MIMO信道容量分析

Capacity analysis of MIMO channel over quasi-static Rician fading channels

为明确在Rician衰落环境中MIMO系统的信道容量特性,针对准静态Rician衰落信道在收端己知信道状态信息的条件下,对MIMO系统的信道容量进行了分析。分析表明,MIMO信道容量与收发天线间信道矩阵的相关阵的特征值分布有关。推导了准静态Rician衰落信道中该相关阵任一特征值的概率密度函数,得到了秩不大于2的独立同分布MIMO信道的容量表达式,且具有相对较低的计算复杂度。

In order to describe the capacity characteristic of MIMO system in Rician fading channel, the capacity of MIMO system in quasi-static flat Rician fading channels was analyzed with the perfect channel state information. It is shown that the capacity of MIMO channel is relative to the distribution of eigenvalues of the matrix, the correlation matrix of channel matrix between transmitter and the receiver. The probability density function of these eigenvalues was derived, and the capacity expression with low complexity was obtained when the rank of channel matrix is less than three over quasi static independent and identically distributed （i. i. d） Rician fading channel.