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Performance Analysis of Parallel Relaying in Free-Space Optical Systems.

Authors :
Molla Aghajanzadeh, Sahar
Uysal, Murat
Source :
IEEE Transactions on Communications. Nov2015, Vol. 63 Issue 11, p4314-4326. 13p.
Publication Year :
2015

Abstract

In this paper, we investigate the information theoretic performance of parallel relaying in free-space optical (FSO) communications over Gamma-Gamma fading channels. We consider an intensity modulation/direct-detection (IM/DD) FSO system with a single relay and a line-of-sight link between the source and the destination. Considering both amplify-and-forward and decode-and-forward relaying, we develop performance characterizations of each relaying mode in terms of outage probability, diversity gain, coding gain, and diversity-multiplexing tradeoff (DMT). Our results demonstrate that parallel relaying improves the performance of FSO systems by bringing diversity advantages. In addition, both relaying modes achieve the same DMT and diversity gain while their coding gains can be different depending on underlying channels' characteristics. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00906778
Volume :
63
Issue :
11
Database :
Academic Search Index
Journal :
IEEE Transactions on Communications
Publication Type :
Academic Journal
Accession number :
111647183
Full Text :
https://doi.org/10.1109/TCOMM.2015.2469685