Multi-input multi-output channel spatial correlation and channel capacity

Multiple-input multiple-output(MIMO)technology is the key of 3rd Generation Partnership Project(3GPP)long term evolution(LTE)and other advanced wireless communication technology.It greatly depends on the low spatial correlation and MIMO antenna optimization to achieve large capacity and enhance other performance of MIMO system.According to the basic theory of electromagnetism and space channel model(SCM),we analyze the LTE MIMO spatial correlation and channel capacity.We combine the mutual coupling and fix the channel capacity model during the process of analyzing the channel capacity.The results show that in urban micro-cell environment and in suburban macro-cell environment, it can achieve zero correlation and channel capacity of 12.5 bps/Hz(urban micro-cell),10.5 bps/Hz(suburban macro-cell)when the antenna spacing is 0.4 λ and the down-stream antenna is 4×4.These configurations can be widely used in the LTE terminal antenna array to optimize the antenna effect.