基于MIMO几何信道模型的容量界研究

The Bounds of MIMO Capacity Based on the Geometrical Channel Model

MIMO技术是LTE的最重要技术之一。为了研究MIMO系统中信道容量界限,提出了基于双反射的几何信道模型。基于此模型,推导了信道相关系数及信道容量的表达式,证明了收发相关的MIMO信道容量上、下界。MonteCarlo信道容量仿真结果表明,MIMO信道容量上界在低信噪比的条件下具有紧性;而在高信噪比的条件下,MIMO信道容量的下界具有紧性。

MIMO is one of the most important（long term evolution）LTE technology.To investigate the bounds of MIMO capacity,the double bounce model is presented.Based on the MIMO channel model,the expressions of coefficient and capacity are derived,and the bounds of MIMO capacity are proven.The simulation results show that the upper bound is tight when the SNR is low;where the lower bound is tight for the high SNR.