On the performance of fixed-gain amplify-and-forward dual-hop relaying in wireless networks with beamforming

The end-to-end performance of dual-hop relaying networks with beamforming over generalized η-μ fading channels is investigated. In our analysis, we assume fixed-gain relays with single antennas, whereas the source and destination terminals are equipped with multiple antennas. Novel expressions for the generalized moments of the end-to-end signal-to-noise ratio (SNR), the cumulative density function (CDF), probability density function (PDF), and moment generating function (MGF) are derived. These analytical expressions are then used to derive new expressions for Rayleigh fading channels as a special case. The new derived expressions, for Rayleigh fading channels, for the PDF and MGF of the end-to-end SNR are simpler and more tractable than those reported in the literature. Simulation results show the tightness and accuracy of the newly derived expressions.