Dual Hop Differential Amplify-and-Forward relaying with selection combining cooperative diversity over Nakagami-m fading channels

In this paper, the performance of the Dual Hop relaying systems is studied and analyzed. Differential Amplify-and-Forward is the used relaying scheme. Post-Detection Selection combining reception technique was proposed to achieve the cooperative diversity where No explicit channel estimation is needed. Instead, the receiver uses the previous received sample in each branch as the estimate of the current fading gain in that branch. The exact outage probability of the system over additive white Gaussian noise and Nakagami-m fading channels is derived assume independent fading in the channels. Simulation results are plotted for different fading parameters.