End-to-end performance analysis of dual-hop relaying systems over Extended Generalized K-fading channels

Dual-hop transmission systems employing fixed-gain amplify-and-forward relay are studied in this paper. The examination has been done for independent and not necessarily identical Extended Generalized-K fading channels. New, exact closed-form expressions are derived for the n^th moments of the end-to-end signal-to-noise ratio (SNR). The average end-to-end SNR and the amount of fading (AoF) of the system are also derived. Some numerical plots show that the influence of the power imbalance between the two hops may have gainful or harmful effects on the overall system performance.