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Enhancing PHY Security of MISO NOMA SWIPT Systems With a Practical Non-Linear EH Model

Zhou, F, Chu, Zheng, Wu, Y, Al-Dhahir, N and Xiao, Pei (2018) Enhancing PHY Security of MISO NOMA SWIPT Systems With a Practical Non-Linear EH Model In: IEEE ICC 2018 Workshop - IEEE Workshop on Energy Harvesting Wireless Communications., 20 - 24 May 2018, Kansas City, MO, USA.

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Non-orthogonal multiple-access (NOMA) and simultaneous wireless information and power transfer (SWIPT) are promising techniques to improve spectral efficiency and energy efficiency. However, the security of NOMA SWIPT systems has not received much attention in the literature. In this paper, an artificial noise-aided beamforming design problem is studied to enhance the security of a multiple-input single-output NOMA SWIPT system where a practical non-linear energy harvesting model is adopted. The problem is non-convex and challenging to solve. Two algorithms are proposed to tackle this problem based on semidefinite relaxation (SDR) and successive convex approximation. Simulation results show that a performance gain can be obtained by using NOMA compared to the conventional orthogonal multiple access. It is also shown that the performance of the algorithm using a cost function is better than the algorithm using SDR at the cost of a higher computation complexity.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Zhou, F
Wu, Y
Al-Dhahir, N
Date : 7 June 2018
Copyright Disclaimer : © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords : Non-orthogonal multiple access, physical-layer security, resource allocation, non-linear energy harvesting model.
Depositing User : Melanie Hughes
Date Deposited : 07 Mar 2018 16:22
Last Modified : 16 Jan 2019 19:08

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