On efficacy of Rayleigh-inverse Gaussian distribution over K-distribution for wireless fading channels: Research Articles

Authors:
Karmeshu;Rajeev Agrawal
Affiliations:
School of Computer and Systems Sciences, Jawaharlal Nehru University, New Delhi 110 067, India;Department of Electronics and Communication Engineering, Kumaon Engineering College, Dwarahat, Almora Uttaranchal 263 653, India
Venue:
Wireless Communications & Mobile Computing
Year:
2007

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Abstract

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 © 2006 John Wiley & Sons, Ltd.