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Wireless Powered Cooperative Jamming for Secrecy Multi-AF Relaying Networks

Xing, H; Wong, KK; Nallanathan, A; Zhang, R; (2016) Wireless Powered Cooperative Jamming for Secrecy Multi-AF Relaying Networks. IEEE Transactions on Wireless Communications , 15 (12) pp. 7971-7984. 10.1109/TWC.2016.2610418. Green open access

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Abstract

This paper studies secrecy transmission with the aid of a group of wireless energy harvesting-enabled amplify-and-forward (AF) relays performing cooperative jamming (CJ) and relaying. The source node in the network does simultaneous wireless information and power transfer with each relay employing a power splitting receiver in the first phase; each relay further divides its harvested power for forwarding the received signal and generating artificial noise for jamming the eavesdroppers in the second transmission phase. In the centralized case with global channel state information (CSI), we provide the closed-form expressions for the optimal and/or suboptimal AF-relay beamforming vectors to maximize the achievable secrecy rate subject to individual power constraints of the relays, using the technique of semidefinite relaxation (SDR), which is proved to be tight. A fully distributed algorithm utilizing only local CSI at each relay is also proposed as a performance benchmark. Simulation results validate the effectiveness of the proposed multi-AF relaying with CJ over other suboptimal designs.

Type: Article
Title: Wireless Powered Cooperative Jamming for Secrecy Multi-AF Relaying Networks
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TWC.2016.2610418
Publisher version: http://doi.org/10.1109/TWC.2016.2610418
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/
Keywords: Relays, Wireless communication, Wireless sensor networks, Jamming, Receivers, Array signal processing, Network security, Energy harvesting
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1535671
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