On efficacy of Rayleigh-inverse Gaussian distribution over K-distribution for wireless fading channels
On efficacy of Rayleigh-inverse Gaussian distribution over K-distribution for wireless fading channels
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DOI：
10.1002/wcm.295
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发表时间：
2007-01-01
影响因子：
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通讯作者：
Agrawal, Rajeev
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文献类型：
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作者：
Karmeshu, J.;Agrawal, Rajeev
为了研究无线信道的性能特性，了解衰落-阴影效应的概率密度函数是必不可少的。与瑞利-伽马分布(RGD)相对应的K-分布被广泛用于逼近更真实的瑞利-对数正态分布(RLD)，而RLD没有封闭的表达式。分析了一种替代K分布的复合瑞利-逆高斯分布(RIGD)在无线信道中的适用性和有效性。用Kullback-Leibler(KL)散度研究了RIGD和K分布(RGD)的性能特征。在这些研究的基础上，发现RIGD比K分布更适合于捕获无线电信道的衰落阴影方面。版权所有(C)2006 John Wiley&Sons，Ltd.
For studying performance characteristics of radio channels, the knowledge about the probability density function (pdf) of fading-shadowing effects is essential. K-distribution corresponding to Rayleigh-gamma distribution (RGD) is widely used to approximate a more realistic Rayleigh-lognormal distribution (RLD) which does not have a closed form expression. A new composite Rayleigh-inverse Gaussian distribution (RIGD), an alternative to K-distribution, is analyzed with regards to its suitability and effectiveness in radio channels. Detailed investigations are made to study the performance characteristics of RIGD and K-distribution (RGD) in terms of Kullback-Leibler (KL) measure of divergence. Based on these investigations, it is found that RIGD is better suited for capturing fading-shadowing aspects of radio channels instead of K-distribution. Copyright (c) 2006 John Wiley & Sons, Ltd.