Relay-assisted transmission in free-space optical communication - RETRACTED

[This paper has been withdrawn by the publisher.] In recent years, the demand for the use of free-space optical (FSO) communication channel has increased. For link ranges longer than 1 km, atmospheric turbulence-induced fading becomes major performance limiting factor in FSO systems. The relay-assisted transmission is used as powerful fading mitigation tool in atmospheric turbulence channels. Both parallel and series relaying techniques using decode-and-forward mode are discussed. The focus of this study is on considering the channel model, which takes into account both path-loss and turbulence-induced fading. The outage probability equations demonstrate the improvement in performances and it has been compared with direct transmission relaying schemes.