Secure beamforming design for IRS-assisted SWIPT Internet of things system

被引：0
|
作者：
Zhu Z. [1 ,2 ,3 ,4 ]
Xu J. [1 ]
Sun G. [1 ,2 ,4 ]
Wang N. [2 ,3 ]
Hao W. [2 ,3 ,4 ]
机构：
[1] Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou
[2] School of Information Engineering, Zhengzhou University, Zhengzhou
[3] Joint International Laboratory of Intelligent Network and Data Analysis in Henan Province, Zhengzhou University, Zhengzhou
[4] China Industrial Technology Research Institute, Zhengzhou University, Zhengzhou
来源：
Tongxin Xuebao/Journal on Communications | 2021年 / 42卷 / 04期
基金：
中国博士后科学基金; 国家重点研发计划; 中国国家自然科学基金;
关键词：
Energy harvest; Intelligent reflecting surface; Internet of things; Secure beamforming; Simultaneous wireless information and power transfer system;
D O I：
10.11959/j.issn.1000-436x.2021060
中图分类号：
学科分类号：
摘要：
In order to meet the new requirements of intelligent signal processing deployment and physical layer security for green interconnection of things, a design method of secure beamforming was proposed to solve the problem of the shortage of sustainable energy supply in the information and energy transmission at the same time Internet of things (IoT) system assisted by intelligent reflecting surface (IRS). Considering the constraints of secrecy rate, transmit power and IRS reflection phase shift, the optimization problem was modeled as a non-convex quadratic programming problem with quadratic constraints, aiming at maximizing the acquisition power of energy collector, and jointly optimizing the base station transmit beamforming matrix, jammer covariance matrix and IRS phase shift. The non-convex quadratic problem was transformed into an equivalent convex problem by using the relaxation variable, semidefinite relaxation method, auxiliary variable and sequence parameter convex approximation method, and an alternative iterative optimization algorithm was proposed to obtain the feasible solution of the original problem. Simulation results show that the proposed algorithm can converge quickly and improve performance effectively compared with the benchmark scheme. © 2021, Editorial Board of Journal on Communications. All right reserved.
引用
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页码：185 / 193
页数：8
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