Network-coded multiple-source cooperation aided relaying for free-space optical transmission

Authors:
Xiaolin Zhou;Dingchen Zhang;Yandong Yang;Mohammad S. Obaidat
Affiliations:
Department of Communication Science and Engineering, Fudan University, Shanghai, China;Department of Communication Science and Engineering, Fudan University, Shanghai, China;Department of Communication Science and Engineering, Fudan University, Shanghai, China;Department of Computer Science and Software Engineering, Monmouth University, West Long Branch, NJ07764, USA
Venue:
International Journal of Communication Systems
Year:
2012

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Abstract

A network-coded cooperative relaying aided free-space optical (FSO) transmission scheme is designed. The resultant multiple-source cooperation diversity is exploited by the relay to mitigate the strong turbulence-induced fading experienced in FSO channels. At the destination, an iterative multiple source detection algorithm is proposed in conjunction with a chip-level soft network decoding method. Our performance evaluation results using simulation analysis demonstrate that the proposed FSO multiple source detection is capable of approaching the single-user-bound for transmission over Gamma–Gamma turbulence channels. Also, the network-coded cooperative FSO scheme can achieve a significant BER improvement in comparison with conventional noncooperation schemes. Copyright © 2012 John Wiley & Sons, Ltd.