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Optimum wirelessly powered relaying

Zhong, C and Zheng, G and Zhang, Z and Karagiannidis, GK (2015) 'Optimum wirelessly powered relaying.' IEEE Signal Processing Letters, 22 (10). 1728 - 1732. ISSN 1070-9908

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Abstract

© 2015 IEEE. This letter maximizes the achievable throughput of a relay-assisted wirelessly powered communications system, where an energy constrained source, assisted by an energy constrained relay and both powered by a dedicated power beacon (PB), communicates with a destination. Considering the time splitting approach, the source and relay first harvest energy from the PB, which is equipped with multiple antennas, and then transmits the information to destination. Simple closed-form expressions are derived for the optimal PB energy beamforming vector and time split for energy harvesting and information transmission. Numerical results and simulations demonstrate the superior performance compared with some intuitive benchmark beamforming scheme. Also, it is found that placing the relay at the middle of the source-destination path is no longer optimal.

Item Type: Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Depositing User: Jim Jamieson
Date Deposited: 26 Jun 2015 14:53
Last Modified: 30 Jan 2019 16:19
URI: http://repository.essex.ac.uk/id/eprint/14024

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