AN-aided secure transmission in multi-user MIMO SWIPT systems

Zhengyu Zhu, Ning Wang, Zheng Chu, Zhongyong Wang, Inkyu Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, an energy harvesting scheme for a multi-user multiple-input-multiple-output (MIMO) secrecy channel with artificial noise (AN) transmission is investigated. Joint optimization of the transmit beamforming matrix, the AN covariance matrix, and the power splitting ratio is conducted to minimize the transmit power under the target secrecy rate, the total transmit power, and the harvested energy constraints. The original problem is shown to be non-convex, which is tackled by a two-layer decomposition approach. The inner layer problem is solved through semi-definite relaxation, and the outer problem is shown to be a single-variable optimization that can be solved by one-dimensional (1-D) line search. To reduce computational complexity, a sequential parametric convex approximation (SPCA) method is proposed to find a near-optimal solution. Furthermore, tightness of the relaxation for the 1-D search method is validated by showing that the optimal solution of the relaxed problem is rank-one. Simulation results demonstrate that the proposed SPCA method achieves the same performance as the scheme based on 1-D search method but with much lower complexity.

Original languageEnglish
Title of host publication2018 IEEE Wireless Communications and Networking Conference, WCNC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-6
Number of pages6
Volume2018-April
ISBN (Electronic)9781538617342
DOIs
Publication statusPublished - 2018 Jun 8
Event2018 IEEE Wireless Communications and Networking Conference, WCNC 2018 - Barcelona, Spain
Duration: 2018 Apr 152018 Apr 18

Other

Other2018 IEEE Wireless Communications and Networking Conference, WCNC 2018
CountrySpain
CityBarcelona
Period18/4/1518/4/18

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Zhu, Z., Wang, N., Chu, Z., Wang, Z., & Lee, I. (2018). AN-aided secure transmission in multi-user MIMO SWIPT systems. In 2018 IEEE Wireless Communications and Networking Conference, WCNC 2018 (Vol. 2018-April, pp. 1-6). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCNC.2018.8377223