复合衰落信道下分布式MIMO系统下行中断概率分析

doi:10.3969/j.issn.1000-436x.2014.06.021

Abstract

Abstract:

The downlink outage probability of the distributed MIMO systems over a composite channel was discussed. Firstly, a composite fading channel was established by integrating Nakagami-m fading, path loss, and lognormal shad-owing. According to the distributed MIMO system with a center-located base station (BS), a quasi-uniform mobile station (MS) distribution model was proposed, which is more suitable for a real communication environment. Next, an approxi-mate analytical expression of average downlink outage probability of the system with arbitrary MS distribution was de-rived through using mathematical methods such as moment generating function, Gauss-Hermite integral, composite Simpson's rule and so on. Finally, by taking the proposed MS distribution model into account, the derived closed-form outage probability expression and the MS distribution were proved to be correct and reasonable by computer simulation results.

Key words: distributed MIMO system, composite channel, outage probability, MS distribution

Wen-jie PENG,Yue-heng LI,Mei-yan JU,Ping HUANG,Guo-ping TAN. Downlink outage probability analysis of distributed MIMO systems over a composite fading channel[J]. Journal on Communications, 2014, 35(6): 161-169.

Figures/Tables 8

参数	取值
小区半径R/m	1 000
分布式基站数M_t每个基站上天线数L	71、2、3
中心基站位置(D₀,θ₀)	(0,0)
分布式基站位置(R_bs,θ_i)i=1,2,…,(M_t?1)	$(\frac{2 R}{3}, \frac{2 π i}{M_{t} - 1})$
移动台天线数M_r	1、2、3
Nakagami参数m_i	0.5、1、4
参考距离d₀/m	40
路径损耗指数β	3.5、4、4.5
信噪比门限γ_th/dB	0
Hermite多项式阶数N	20
极径节点数P	20
极角节点数Q	20

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Downlink outage probability analysis of distributed MIMO systems over a composite fading channel

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