天线相关性对瑞利衰落下的MIMO相关信道容量的影响

Effect of antenna correlation on MIMO correlated channels capacity under Rayleigh fading

将户外环境等效为收发空域相关性独立的Kronecker相关信道模型,经过推导、仿真分析可知,天线间距越大,角度扩展越小,平均到达角越趋向于与阵列垂直,各态历经容量越大;相关因数较小时,系统的信道容量的改变可以忽略不计,相关因数较大时,系统的信道容量减小的幅度较大.

Outdoor environment was equivalent to a Kronecker correlated channel model in which spatial correlation between the receiving end and transmitting end was independent,by derivation and simulation a conclusion was obtained that the larger the antenna intervals are,the smaller the angle spread is,the average angle of arrival tend to be vertical with the arrays more,and ergodic capacity would be larger,when the correlation coefficient is small,change of the channel capacity can be ignored,but when it increases,the decreasing range of the channel capacity is relatively larger.