LTE-Advanced中继下行系统级评估

中继技术是LTE-Advanced的关键技术之一。将中继节点引入蜂窝系统后,传统网络的结构发生了很大的变化,其影响应得到客观的评估。文章首先对中继系统进行了建模;随后描述了一种多用户MIMO方案以增强基站和中继站之间的成为瓶颈的回传（Backhaul）链路;最后提供了大量的仿真结果以全面评估中继系统下行链路的性能。

Evaluation of LTE-Advanced Relay Downlink System

Relay technology is one of the key technologies in LTE-Advanced.Since relay nodes were introduced to cellular system,great changes have taken place in the structure of traditional networks and the impact of the changes should be evaluated objectively.Firstly,a relay system model is established.Then a MU-MIMO scheme is described to strengthen Backhaul link,which is the bottleneck between base station and relay station.Finally,numerical simulation results are provided to comprehensively evaluate the downlink performance of relay system.