Maximal Ratio Transmission in AF MIMO Relay Systems Over Nakagami- $m$ Fading Channels


During this paper, amplify-and-forward (AF)-based mostly cooperation in a multiple-antenna-based wireless communication system is studied. In particular, we address the problem of hop-by-hop beamforming and combining in a dual-hop AF multiple-input–multiple-output (MIMO) relay network with two antennas at every node over Nakagami- fading channels for any integer values of . The beamforming and mixing vectors are calculated by employing a maximum-eigenvalue-based mostly criterion. A moment-generating-function (mgf)-primarily based approach is used for the analysis. We derive a closed-type expression of mgf of the instantaneous received signal-to-noise ratio (SNR) of the thought of cooperative theme. Additionally, diversity order analysis of the beamforming-and-combining-primarily based AF MIMO relay system is performed for three cases. It is deduced on the premise of this paper that the variety order of the hop-by-hop beamforming and combining in an AF MIMO relay system linearly depends upon the minimum of the Nakagami parameters of each hops.

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