为了能在极度复杂的无线环境中充分发挥MIMO系统的优越性,需分析无线传播环境对系统的影响,特别是在MIMO系统中,信道的相关性会对系统尤其是系统容量造成很大的影响。基于通用的微小区信道椭圆模型,通过几何方法,得到了微小区中信道间相关系数的封闭解表达式,通过仿真说明了在微小区中相关系数与发射、接收端天线阵阵元间距之间的关系,为在MIMO中消除相关性的影响提供了有效的工具。 In order to give full play to the superiority of the MIMO system in the extremely complicated wireless environment, it is necessary to analyze the impact of the wireless propagation environment on the system. Especially in the MIMO system, the correlation of the channel has a great influence on the system, especially the system capacity . Based on the common microcell channel ellipse model, the closed-form expression of correlation coefficient between channels in microcell is obtained by the geometric method. The correlation between the correlation coefficients in the microcell and the spacing between the transmitting and receiving antenna arrays is obtained through the simulation. , Providing an effective tool for eliminating the effects of correlation in MIMO.