MIMO分布式天线系统中的延时失衡性能分析

MIMO分布式天线系统中的延时失衡性能分析

内容简介：在MIMO室内分布式天线系统中,由于馈线以及极化天线本身的差异会引入延时不平衡因素。针对MIMO系统,从理论上分析分布式天线系统中延时失衡对MIMO系统带来的影响。通过仿真,定量分析了MIMO上下行链路中,延时失衡对基带性能的不利影响。结果表明,上行链路性能对延时差异不敏感;对下行链路,在时延差异达到0.5 CP时,系统性能会有约2 dB损失;当延时差异达到0.75 CP时,性能下降达到8 dB。

Abstract：The difference between lines and devices produces delay unbalance for MIMO indoor distributed antenna systems.A theoretical analysis of the impact of delay unbalance on distributed antenna systems is given,which is confirmed by quantitative analysis.Simulation results show that the backward link is not sensitive to the delay difference,and that for forward link,when delay unbalance is CP/2,the performance loss will be 2 dB;and when delay unbalance is 3/4CP,the performance loss will be 8 dB.

作者：邓单,

关键词：MIMO, 分布式天线, 延时失衡,