James Leger, Editor-in-Chief
Chadi Abou-Rjeily and Mustapha Hamad
Chadi Abou-Rjeily1,* and Mustapha Hamad1,2
1Department of Electrical and Computer Engineering, Lebanese American University (LAU), Byblos,
*Corresponding author: firstname.lastname@example.org
This paper investigates a novel method for boosting the performance of parallel-relaying decode-and-forward (DF) cooperative free space optical (FSO) networks. The proposed solution takes advantage from the presence of the radio frequency (RF) links that are often established to backup the FSO links in practical systems. In this context, the low speed RF links are used for carrying the information packets that have not been delivered along the direct FSO link for the sake of sharing these packets among the relays in a simple and efficient manner. This packet sharing enhances the chances for correct detection at the relays thus increasing the number of relays that will participate in the relay-destination transmission phase. An exact outage probability analysis is carried out in the case of gamma-gamma FSO fading channels with pointing errors and of Rician/Rayleigh RF fading channels. At a second time, the cut-set method is applied for deriving a simple and tractable upper-bound that is useful for evaluating the asymptotic performance and diversity gain.
© 2017 Optical Society of America
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