  We analysis the performances for the dual-hop fixed gain amplify-and-forward
(AF) relay systems operating over mixed radio-frequency (RF) and free-space
optical (FSO) links. The RF link is subject to Rician fading and the FSO link
experiences Gamma-Gamma turbulence fading. We derive the closed-form
expressions for the outage probability and the average symbol error rate in
terms of the Meijer's G function.All analytical results are corroborated by
simulation results and the effects of fading parameters on the system
performances are also studied.
