Performance analysis of space-diversity free-space optical systems over the correlated Gamma–Gamma fading channel using Padé approximation method

Yang, Guowei, Bourennane, Salah, Ghassemlooy, Zabih and Khalighi, Mohammad-Ali (2014) Performance analysis of space-diversity free-space optical systems over the correlated Gamma–Gamma fading channel using Padé approximation method. IET Communications, 8 (13). pp. 2246-2255. ISSN 1751-8628

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Abstract

We propose an analytical approach to evaluate the performance of space-diversity free-space optical (FSO) systems over correlated Gamma-Gamma (ΓΓ) fading channels. To do this, we firstly derive an infinite series representation for the moment generating function (MGF) of the sum of arbitrarily correlated ΓΓ random variables (RVs). Then, a closed-form approximate expression for the probability density function (PDF) of the sum of ΓΓ RVs is obtained from the MGF with the aid of Padé approximation. The performance of the FSO system is then evaluated based on this PDF. Through some numerical results we illustrate the accuracy of the proposed method and further discuss its limitations.

Item Type:	Article
Uncontrolled Keywords:	approximation theory, diversity reception, fading channels, optical communication, probability, FSO systems, MGF, PDF, Padé approximation method, correlated Gamma-Gamma fading, channel, inflnite series representation, moment generating function, performance analysis, probability density function, space-diversity free-space optical systems, sum-of-arbitrarily correlated ΓΓ random variables
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Paul Burns
Date Deposited:	23 Sep 2014 08:51
Last Modified:	12 Oct 2019 19:20
URI:	http://nrl.northumbria.ac.uk/id/eprint/17647

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