复合衰落信道下分布式MIMO系统中断概率及信道容量分析
Outage probability and capacity analysis of distributed MIMO systems over a composite fading channel
- 通信学报 2015年36卷第2期 页码：221-230
- 作者机构：
河海大学 计算机与信息学院，江苏 南京 211100
- 作者简介：
[ "彭文杰（1989-），男，江苏启东人，河海大学硕士生，主要研究方向为现代无线通信网络和MIMO系统。" ]
[ "李岳衡（1971-），男，湖南永兴人，博士，河海大学教授，主要研究方向为通信信号处理、现代无线通信网络。" ]
[ "薛团结（1990-），男，河南鹿邑人，河海大学硕士生，主要研究方向为现代无线通信网络和多天线传输技术。" ]
[ "居美艳（1979-），女，江西瑞昌人，博士，河海大学讲师，主要研究方向为移动通信关键技术与通信信号处理。" ]
[ "黄平（1972-），女，重庆人，博士，河海大学讲师，主要研究方向为纠错码编解码技、新型编码调制技术。" ]
- 基金信息：江苏省教育厅高校科研成果产业化推进基金资助项目(JHB2012-4)
DOI：10.11959/j.issn.1000-436x.2015052
中图分类号： TN929.5-
网络首发：2015-02，
纸质出版：2015-02-25
- 稿件说明：
移动端阅览
彭文杰, 李岳衡, 薛团结, 等. 复合衰落信道下分布式MIMO系统中断概率及信道容量分析[J]. 通信学报, 2015,36(2):221-230.
Wen-jie PENG, Yue-heng LI, Tuan-jie XUE, et al. Outage probability and capacity analysis of distributed MIMO systems over a composite fading channel[J]. Journal on Communications, 2015, 36(2): 221-230.
彭文杰, 李岳衡, 薛团结, 等. 复合衰落信道下分布式MIMO系统中断概率及信道容量分析[J]. 通信学报, 2015,36(2):221-230. DOI： 10.11959/j.issn.1000-436x.2015052.
Wen-jie PENG, Yue-heng LI, Tuan-jie XUE, et al. Outage probability and capacity analysis of distributed MIMO systems over a composite fading channel[J]. Journal on Communications, 2015, 36(2): 221-230. DOI： 10.11959/j.issn.1000-436x.2015052.
摘要
针对分布式MIMO系统中断概率和信道容量这2大性能指标，在复合衰落信道模型下，当上行链路采用最大比发送—选择合并，下行链路采用选择发送—最大比合并时，利用Lognormal分布对复杂Gamma-Lognormal分布的近似，推导得到当移动台位置给定时，系统中断概率和信道容量的闭合表达式，证明了系统性能指标与移动台分布之间存在密切的联系；随后依照实际通信环境，提出一种考虑存在小区热点的移动台非均匀分布模型，然后推导得到考虑该分布模型后的系统平均中断概率和平均信道容量闭合表达式；最后通过计算机仿真，证明了所提近似处理的精确性以及各项理论分析的合理性。
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.
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references
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