Author
Aghajanzadeh, S. M., Uysal, Murat
Publication Date
2012-05
Publication Place
-
IEEE
Subject
Free-space optical communications, Automatic retransmission request, Turbulence-induced fading, Outage probability, Throughput
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
0090-6778
Record ID
008cc915-9d0d-4ef7-b56a-0fb70bc677ce
Library Location
Electrical & Electronics Engineering
Date
2012-05
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
Automatic retransmission request (ARQ) is a feedback-based data link layer technique which enhances the reliability of communication in fading channels. In this paper, we investigate the performance of hybrid-ARQ (H-ARQ) techniques in coherent free-space optical (FSO) communication systems over atmospheric turbulence-induced fading channels. Under the assumption of a Gamma-Gamma statistical fading channel model, we derive outage probability and throughput expressions for three H-ARQ protocols. We further characterize the outage performance at high values of signal-to-noise-ratio (SNR) through diversity and coding gains. Our results provide insight into the performance mechanisms of different H-ARQ protocols in coherent FSO systems and demonstrate that significant performance gains can be achieved through the deployment of H-ARQ particularly in the strong turbulence regime.
DOI
10.1109/TCOMM.2012.030712.110409
Cilt
60
