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

摘要

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.