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

Zhengyu ZHU; Jinlei XU; Gangcan SUN; Ning WANG; Wanming HAO

doi:10.11959/j.issn.1000-436x.2021060

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

Papers | 更新时间：2024-06-05

- Secure beamforming design for IRS-assisted SWIPT Internet of things system
- Journal on Communications Vol. 42, Issue 4, Pages: 185-193(2021)
- 作者机构：
  
  1. 郑州大学河南先进技术研究院，河南郑州 450001
  2. 郑州大学信息工程学院，河南郑州 450001
  3. 郑州大学河南省智能网络和数据分析国际联合实验室，河南郑州 450001
  4. 郑州大学产业技术研究院，河南郑州 450001
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61801434);The National Natural Science Foundation of China(61801435);The National Natural Science Foundation of China(61771431);China Post-doctoral Science Foundation Project(2020M682345);The Science and Technology Research Project of Henan Province(192102310178);Major Science and Technology Innovation Project of Zhengzhou(2019CXZX0037);The National Key Re-search and Development Program of China(2019QY0302);The National Key Research and Development Program of China(2019YFB1803200)
- DOI：10.11959/j.issn.1000-436x.2021060
  CLC： TN92
- Online First：2021-04，
  
  Published：25 April 2021
- 稿件说明：
移动端阅览
Zhengyu ZHU, Jinlei XU, Gangcan SUN, et al. Secure beamforming design for IRS-assisted SWIPT Internet of things system[J]. Journal on Communications, 2021, 42(4): 185-193.
DOI：

Zhengyu ZHU, Jinlei XU, Gangcan SUN, et al. Secure beamforming design for IRS-assisted SWIPT Internet of things system[J]. Journal on Communications, 2021, 42(4): 185-193. DOI： 10.11959/j.issn.1000-436x.2021060.

摘要

为满足绿色万物互联的智能信号处理部署和物理层安全的新要求，针对基于智能反射面辅助的无线携能通信物联网系统中可持续能量供应紧缺问题，提出了一种安全波束成形设计方法。考虑保密速率、发射功率和IRS反射相移约束，以最大化能量采集器采集功率为目标，联合优化基站发射波束成形矩阵和干扰机协方差矩阵以及IRS相移，将优化问题建模为具有二次型约束的非凸二次型规划问题。利用松弛变量、半定松弛法、辅助变量和序列参数凸逼近法将非凸的二次型问题转化为等价的凸问题，并提出一种交替迭代优化算法获取原问题的可行解。仿真结果表明，所提算法能够快速收敛，且与基准方案相比能有效地提升性能。

Abstract

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.

关键词

Keywords

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