Study of channel capacity for hybrid decode-amplify-forward (HDAF) scheme in distributed Alamouti coded cooperative network

In this paper, average channel capacity analysis of a SNR based hybrid decode amplify forward (HDAF) scheme in a distributed Alamouti coded cooperative network (one source, two relays and one destination) is studied. Considering a flat Rayleigh fading channel environment, the MATLAB simulation and analysis are carried out. In the cooperative phase, two relays are employed, where each one of them (relays) transmitting each row Alamouti code. Here SNR threshold selection depends on the target rate information. The closed form expression for average channel capacity with tight upper bound is derived and compared with the simulation done in MATLAB environment. It is observed that the proposed hybrid relaying technique outperforms the individual AF and DF ones in the distributed Alamouti coded cooperative network.