Artificial-noise-aided Secure Beamforming in Full-duplex Wireless-powered Relay

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This paper studies a wireless powered relaying (WPR) system in which a source transmits an information signal to a destination with the help of an energy constrained relay in the presence of an eavesdropper. This work considers a scenario in the full-duplex WPR system where the information transmission/reception and the energy harvesting are performed simultaneously at the relay. We first derive an achievable secrecy rate of the system and formulate a joint optimization problem of artificial-noise-aided secure beamforming to maximize the achievable secrecy rate. Then, an efficient semi-definite relaxation (SDR) based algorithm is proposed to obtain the optimal beamforming. Furthermore, we also propose three suboptimal beamforming but low computational complexity schemes. Comparisons are carried out among the performances of the proposed optimal and suboptimal schemes.
Publisher
IEEE
Issue Date
2018-04-16
Language
English
Citation

2018 IEEE Wireless Communications and Networking Conference(WCNC)

DOI
10.1109/WCNC.2018.8377251
URI
http://hdl.handle.net/10203/243906
Appears in Collection
EE-Conference Papers(학술회의논문)
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