基于网络编码的分布式天线系统性能分析

文章针对多输入多输出（MIMO）系统在移动终端实现上的限制，提出分布式天线系统（DAS）的解决方案来获得空间分集增益。采用DAS模型，通过使用一个具有网络编码解码运算能力的辅助天线增强用户与基站间的通信，探讨基于网络编码的天线分集增益。分析比较无辅助天线系统、简单DAS和基于网络编码的DAS中断概率性能后，理论分析和计算机仿真结果表明，相比简单DAS，基于网络编码的DAS节约硬件成本并提高了频谱利用率；系统中断概率平均降低0．0164，可获得更大的分集增益。

The Performance Analysis of Distributed Antenna Systems Based on Network Coding

Due to the limitation of mobile terminal implementation in MIMO systems, Distributed Antenna System （DAS） is proposed to provide space diversity gain. In order to discuss the antenna diversity gain offered by implementing network coding, this paper adopts the DAS model which uses assisting antennas to enhance the communication between users and terminals. By comparing traditional system without assisting antennas, simple DAS and network-coded DAS, theoretical analysis and computer results show that network-coded DAS leads to higher diversity gain, saving the hardware cost while making higher use of spectral efficiency, probability of system outage reduced by average of 0.0164.