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Energy-Harvesting in Cooperative AF Relaying Networks Over Log-Normal Fading Channels

Rabie, KM and Salem, A and Alsusa, E and Slim Alouini, M (2016) Energy-Harvesting in Cooperative AF Relaying Networks Over Log-Normal Fading Channels. In: IEEE International Conference on Communications (IEEE ICC'16: Communications for All Things), 22 May 2016 - 27 May 2016, Kuala Lumpur, Malaysia.

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Abstract

Energy-harvesting (EH) and wireless power transfer are increasingly becoming a promising source of power in future wireless networks and have recently attracted a considerable amount of research, particularly on cooperative two-hop relay networks in Rayleigh fading channels. In contrast, this paper investigates the performance of wireless power transfer based two-hop cooperative relaying systems in indoor channels characterized by log-normal fading. Specifically, two EH protocols are considered here, namely, time switching relaying (TSR) and power splitting relaying (PSR). Our findings include accurate analytical expressions for the ergodic capacity and ergodic outage probability for the two aforementioned protocols. Monte Carlo simulations are used throughout to confirm the accuracy of our analysis. The results show that increasing the channel variance will always provide better ergodic capacity performance. It is also shown that a good selection of the EH time in the TSR protocol, and the power splitting factor in the PTS protocol, is the key to achieve the best system performance.

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