On Amplify-and-Forward Relaying Over Hyper-Rayleigh Fading Channels
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Date
2014-12
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Mark
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Společnost pro radioelektronické inženýrství
Abstract
Relayed transmission holds promise for the next generation of wireless communication systems due to the performance gains it can provide over non-cooperative systems. Recently hyper-Rayleigh fading, which represents fading conditions more severe than Rayleigh fading, has received attention in the context of many practical communication scenarios. Though power allocation for Amplify-and-Forward (AF) relaying networks has been studied in the literature, a theoretical analysis of the power allocation problem for hyper-Rayleigh fading channels is a novel contribution of this work. We develop an optimal power allocation (OPA) strategy for a dual-hop AF relaying network in which the relay-destination link experiences hyper-Rayleigh fading. A new closed-form expression for the average signal-to-noise ratio (SNR) at destination is derived and it is shown to provide a new upper-bound on the average SNR at destination, which outperforms a previously proposed upper-bound based on the well-known harmonic-geometric mean inequality. An OPA across the source and relay nodes, subject to a sum-power constraint, is proposed and it is shown to provide measurable performance gains in average SNR and SNR outage at the destination relative to the case of equal power allocation.
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Citation
Radioengineering. 2014, vol. 23, č. 4, s. 1226-1233. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2014/14_04_1226_1233.pdf
http://www.radioeng.cz/fulltexts/2014/14_04_1226_1233.pdf
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Peer-reviewed
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en