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2019-01-15

Secrecy Sustainable Transmission Design in Energy Harvesting Enable Relay Networks

By Jianfeng Kong, Feng Zhou, and Zhenhai Liu
Progress In Electromagnetics Research M, Vol. 78, 11-18, 2019
doi:10.2528/PIERM18092608

Abstract

In this paper, we investigate the secrecy design in a sustainable relay network, where the relay is energy harvesting enabled and utilizes time switching to harvest wireless power. Specifically, assuming half-duplex amplify-and-forward relaying, we investigate the worst-case secrecy rate maximization by jointly designing the relay beamforming matrix, artificial noise covariance, and the time switching ratio. However, the formulated problem is highly non-convex due to the secrecy rate function and the dynamic relay transmit power constraint. By decoupling the original problem, we propose a two-layer optimization algorithm, where the outer problem is solved by two-dimensional search while the inner problem is solved by semi-definite relaxation. Numerical results show the effectiveness of the proposed scheme.

Citation


Jianfeng Kong, Feng Zhou, and Zhenhai Liu, "Secrecy Sustainable Transmission Design in Energy Harvesting Enable Relay Networks," Progress In Electromagnetics Research M, Vol. 78, 11-18, 2019.
doi:10.2528/PIERM18092608
http://www.jpier.org/PIERM/pier.php?paper=18092608

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