Performance of AF and DF relays by employing Half Duplex and Full Duplex mode

This paper investigates the performance of Amplify-and-Forward (AF) and Decode-and-Forward (DF) relays by deploying both Half Duplex (HDX) and Full Duplex (FDX) mode and their performance is analyzed and compared. 3GPP-LTE-Advanced (LTE-A) has considered the deployment of Relay Node (RN) for cost effective throughput enhancement and coverage extension. In LTE-A the RN can operate in either HDX or FDX scheme. The performance of AF/DF forward strategies deployed in HDX/FDX mode has been compared. Our numerical and simulation results show that the capacity of HDX AF relaying is higher than the capacity of HDX DF relaying and the capacity of FDX AF relaying is higher than the FDX DF relaying and FDX mode reaches nearly twice of the performance of HDX relaying. In ideal RL, DF relaying out performances AF relaying in a capacity point of view because it does not forward noise in the network.