On the performance analysis of dual hop relaying systems using differentialamplify-and-forwardalong withpost-detectionselection combining techniques over Nakagami-m fading channels

The proposed work analyzes the performance of dual-hop relaying systems by means of the differential amplify-and-forward relaying method. The post-detection selection combining reception scheme proposed in this article allows receivers to approximate existing fading gain in a branch by using previously received samples to achieve a cooperative diversity at cases that exclude the need of having explicit channel estimation. Assuming independent fading channels, tight closed-form expressions for the system bit error rate and outage probability are ultimately derived considering Nakagami-m fading channels and additive white Gaussian noise. Different fading parameters were used to plot simulation results.