Performance analysis of mixed Nakagami- m and Gamma–Gamma dual-hop FSO transmission systems

Zedini, E., Ansari, I. S. and Alouini, M.-S. (2015) Performance analysis of mixed Nakagami- m and Gamma–Gamma dual-hop FSO transmission systems. IEEE Photonics Journal, 7(1), 7900120. (doi: 10.1109/JPHOT.2014.2381657)

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In this paper, we carry out a unified performance analysis of a dual-hop relay system over the asymmetric links composed of both radio-frequency (RF) and unified free-space optical (FSO) links under the effect of pointing errors. Both fixed and variable gain relay systems are studied. The RF link is modeled by the Nakagami-m fading channel and the FSO link by the Gamma-Gamma fading channel subject to both types of detection techniques (i.e., heterodyne detection and intensity modulation with direct detection). In particular, we derive new unified closed-form expressions for the cumulative distribution function, the probability density function, the moment generating function (MGF), and the moments of the end-to-end signal-to-noise ratio (SNR) of these systems in terms of the Meijer's G function. Based on these formulas, we offer exact closed-form expressions for the outage probability (OP), the higher order amount of fading, and the average bit error rate (BER) of a variety of binary modulations in terms of the Meijer's G function. Furthermore, an exact closed-form expression of the end-to-end ergodic capacity is derived in terms of the bivariate G function. Additionally, by using the asymptotic expansion of the Meijer's G function at the high-SNR regime, we derive new asymptotic results for the OP, the MGF, and the average BER in terms of simple elementary functions.

Item Type:Articles
Additional Information:This work was supported in part by a grant from King Abdulaziz City for Science and Technology.
Glasgow Author(s) Enlighten ID:Ansari, Dr Imran
Authors: Zedini, E., Ansari, I. S., and Alouini, M.-S.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:IEEE Photonics Journal
ISSN (Online):1943-0655
Copyright Holders:Copyright © 2014 IEEE
First Published:First published in IEEE Photonics Journal 7(1):7900120
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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