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arXiv 1202.2576cs.ITmath.ITmath.PRmath.STstat.TH
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Gamma随机变量和的新结果及其在Nakagami-m衰落信道下无线通信系统性能中的应用

New Results on the Sum of Gamma Random Variates With Application to the Performance of Wireless Communication Systems over Nakagami-m Fading Channels

Imran Shafique Ansari, Ferkan Yilmaz, Mohamed-Slim Alouini, Oğuz Kucur

摘要:

L个独立但不一定相同分布的Gamma变量之和的概率密度函数(PDF)和累积分布函数,适用于在Nakagami-m衰落信道上工作的最大比合并(MRC)接收机的输出统计,或者换句话说,适用于Nakagami-m分布的平方和是用户感兴趣的情况的统计分析,的封闭形式的著名的Meijer的G函数和易于计算的福克斯的H-酒吧功能的整数值和非整数值的m衰落参数。进一步的分析,特别是通过基于PDF的方法的比特出错率也提供了在Meijer的G函数和福克斯的H-bar函数的整数值衰落参数,和扩展福克斯的H-bar函数(H-hat)的非整数值衰落参数方面的封闭形式。我们提出的结果补充以前已知的结果,无论是表示在无限和,嵌套和,或高阶导数的衰落参数m。

英文摘要:

The probability density function (PDF) and cumulative distribution function of the sum of L independent but not necessarily identically distributed Gamma variates, applicable to the output statistics of maximal ratio combining (MRC) receiver operating over Nakagami-m fading channels or in other words to the statistical analysis of the scenario where the sum of squared Nakagami-m distributions are user-of-interest, is presented in closed-form in terms of well-known Meijer's G function and easily computable Fox's H-bar function for integer valued and non-integer valued m fading parameters. Further analysis, particularly on bit error rate via a PDF-based approach is also offered in closed form in terms of Meijer's G function and Fox's H-bar function for integer valued fading parameters, and extended Fox's H-bar function (H-hat) for non-integer valued fading parameters. Our proposed results complement previous known results that are either expressed in terms of infinite sums, nested sums, or higher order derivatives of the fading parameter m.

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