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Wireless Power Transfer in Cooperative DF Relaying Networks with Log-Normal Fading

Rabie, KM and Adebisi, B and Alouini, S (2016) Wireless Power Transfer in Cooperative DF Relaying Networks with Log-Normal Fading. In: IEEE GLOBECOM 2016, 4 - 8 December 2016, Washington DC. (In Press)

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Abstract

Energy-harvesting (EH) and wireless power transfer in cooperative relaying networks have recently attracted a considerable amount of research attention. Most of the existing work on this topic however focuses on Rayleigh fading channels which represents outdoor environments. Unlike these studies, in this paper we analyze the performance of wireless power transfer in two-hop decode-and-forward (DF) cooperative relaying systems in indoor channels characterized by log-normal fading. Three well-known EH protocols are considered in our evaluations: a) time switching relaying (TSR), b) power splitting relaying (PSR) and c) ideal relaying receiver (IRR). The performance is evaluated in terms of the ergodic outage probability for which we derive accurate analytical expressions for the three systems under consideration. Results reveal that careful selection of the EH time and power splitting factors in the TSR- and PSR-based system are important to optimize performance. It is also presented that the optimized PSR system has near-ideal performance and that increasing the source transmit power and/or the energy harvester efficiency can further improve performance.

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