分布式天线系统下行MRT-SC容量分析

2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI:10.1109/ChinaCom.2011.6158173

Zhun Ye, Linan Sun, Qiyue Yu, Zhongzhao Zhang

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引用次数: 1

摘要

研究了分布式天线系统(DAS)中最大比传输选择组合(MRT-SC)的下行容量。假设了复合衰落信道，包括路径损失、对数正态阴影和多径瑞利衰落。利用基于矩生成函数的方法，导出了容量累积分布函数(CDF)的解析近似。研究了发射/接收天线数目对容量分布的影响以及接收机位置对10%中断容量的影响。仿真结果与解析近似结果吻合较好。结果表明，MRT-SC的10%停运能力在大部分感兴趣区域呈近似均匀分布，其值与最大比传输-最大比组合(MRT-MRC)基本一致。

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Capacity analysis of downlink MRT-SC in distributed antenna system

This paper investigates the downlink capacity of maximal ratio transmission-selection combining (MRT-SC) in the distributed antenna system (DAS). Composite fading channels are assumed, which include path loss, lognormal shadowing and multi-path Rayleigh fading. Analytical approximation of the capacity's cumulative distribution function (CDF) is derived by means of a moment generation function (MGF) based approach. The influence of transmit/receive antenna number on the capacity distribution and the impact of receiver location on the 10% outage capacity are investigated. Simulation results agree with the analytical approximations well. Furthermore, it shows that the 10% outage capacity of MRT-SC presents an approximately uniform distribution over most of the interested area, and its value is almost the same with maximal ratio transmission-maximal ratio combining (MRT-MRC).

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2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)

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