北京大学学报(自然科学版)

平坦衰落MIMO信道的能量统计特征分析

薛金银1,朱孝龙2,焦秉立1   

  • 收稿日期:2004-07-13 出版日期:2005-09-20 发布日期:2005-09-20

Statistical Distributions of MIMO Channels over Flat Fading

XUE Jinyin1, ZHU Xiaolong2, JIAO Bingli1   

  • Received:2004-07-13 Online:2005-09-20 Published:2005-09-20

摘要: 以顺序统计量分析 Rayleigh 平坦衰落 MIMO 信道矩阵各向量能量的分布特征,给出其各阶矩公式以及列(行)数为 1 和 2 时行(列)向量的能量期望值的简洁表达式,并由此推导出信道矩阵的单边维数趋于无穷时行和列向量能量期望值的上下界。最后讨论了上述分析结果在 MIMO 系统的天线选择和分集增益计算方面的应用。

关键词: MIMO, 顺序统计量, 平坦衰落, gamma分布

Abstract: The authors discuss the statistical distributions of multiple-input multiple-output (MIMO) channels over flat Rayleigh fading via the order statistics analysis. Simplified expressions are derived for expectations of the vector energies when the column (or row) number is equal to 1 and 2, which is followed by the upper and lower bounds when the antenna number at one side approaches infinite. Finally, some applications of the analysis, such as the computation of antenna selection and diversity gain, are discussed.

Key words: MIMO, order statistics, flat fading, gamma distribution

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