In this paper we consider performance of a cooperative system consisting of dual hop amplify-and-forward relay system. We consider channel state information assisted system in Nakagami-m channel. Also, within the analysis we considred the existence of co-channel interference at relay. The influence of the interference, as well as the influence of other system's parameters, such as the fading parameter m and outage probability threshold γth on the system’s performance is considered.

Keywords: Amplify-and-forward relay, Nakagami-M fading, Co-channel interference, Outage probability, Average bit error rate