Dual-hop decode-and-forward relaying systems with relay selection and maximal-ratio schemes

The end-to-end performance of dual-hop transmissions with decode-and-forward relaying over independent non-identically distributed Nakagami-m fading channels is investigated. In the analysis, partial relay selection is employed. This recently proposed selection scheme finds applicability in different wireless systems such as ad hoc and sensor networks. Closed-form expressions for the outage probability and average symbol error rates are provided. Furthermore, the overall system performance is illustrated through representative numerical results.