复合衰落信道下分布式MIMO系统中断概率及信道容量分析

doi:10.11959/j.issn.1000-436x.2015052

Abstract

Abstract:

The exact closed-form expressions about the outage probability and capacity of distributed MIMO systems over a composite fading channel are derived firstly by using Lognormal approximation to complicated Gamma-lognormal distribution when mobile station (MS) in the cell is fixed at some position and the so-called maximum ratio transmission/selected combining (MRT-SC) and selected transmission/maximum ratio combining (ST-MRC) schemes are adopted in uplink and downlink respectively.Then based on a newly proposed non-uniform MS cell distribution model,which is more consistent with the MS cell hotspot distribution in an actual communication environment,the average outage probability and capacity formulas synthesizing the MS cell position information are further derived.Finally,the accuracy of the approximation method and the rationality of the corresponding theoretical analysis about the system performance are proven and illustrated by computer simulations.

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

Wen-jie PENG,Yue-heng LI,Tuan-jie XUE,Mei-yan JU,Ping HUANG. Outage probability and capacity analysis of distributed MIMO systems over a composite fading channel[J]. Journal on Communications, 2015, 36(2): 221-230.

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References 20

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参数	取值
小区边长D	500 m
移动台天线数L	1, 2^*, 3
Nakagami衰落系数m_i	0.5, 1^*, 3, 4
参考距离d₀	40 m
路径损耗指数β	3.5, 4^*, 4.5
阴影衰落标准差σ	8 dB
信噪比门限γ_th	0 dB
移动台分布参数λ	0.7
移动台密集区半径r	350 π
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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Outage probability and capacity analysis of distributed MIMO systems over a composite fading channel

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