Impact of Opportunistic Scheduling on Cooperative Dual-Hop Relay Networks
This paper advocates the performance of a Multiuser Relay Network (MRN) equipped with a single Amplify-and-Forward (AaF) relay over Rayleigh fading environments. The authors derive new expressions for the Cumulative Distribution Function (CDF) of the highest instantaneous end-to-end Signal-to-Noise Ratio (SNR) taking into consideration the two cases of fixed gain relays and variable gain relays. Relying on these statistical results, they derive new expressions for the outage probability and Symbol Error Rate (SER), both of which are obtained in exact closed form. Furthermore, they derive simple asymptotic outage probability and SER. Their asymptotic results confirm that opportunistic scheduling has no impact on the diversity order.