Secure communication optimization for double-IRS assisted SWIPT system

Jianfeng CHEN; Miao CUI; Guangchi ZHANG; Qingqing WU; Hui ZENG

doi:10.11959/j.issn.1000-0801.2022015

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Secure communication optimization for double-IRS assisted SWIPT system

Research and Development | 更新时间：2024-06-05

- Secure communication optimization for double-IRS assisted SWIPT system
- Telecommunications Science Vol. 38, Issue 1, Pages: 47-60(2022)
- 作者机构：
  
  1. 广东工业大学信息工程学院，广东广州 510006
  2. 中国电子科技集团公司第七研究所，广东广州 510310
  3. 广东省信息光子技术重点实验室，广东广州 510006
  4. 澳门大学智慧城市物联网国家重点实验室，澳门 999078
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.1000-0801.2022015
  CLC： TN929
- Published Online：2022-01，
  
  Published：20 January 2022
- 稿件说明：
移动端阅览
Jianfeng CHEN, Miao CUI, Guangchi ZHANG, et al. Secure communication optimization for double-IRS assisted SWIPT system[J]. Telecommunications science, 2022, 38(1): 47-60.
DOI：

Jianfeng CHEN, Miao CUI, Guangchi ZHANG, et al. Secure communication optimization for double-IRS assisted SWIPT system[J]. Telecommunications science, 2022, 38(1): 47-60. DOI： 10.11959/j.issn.1000-0801.2022015.

摘要

摘要：研究采用两个智能反射平面保障无线携能通信系统信息传输的物理层安全。通过联合优化两个智能反射平面的反射波束成形和基站的发射波束成形以最大化系统的总信息传输速率，同时满足基站的发射功率约束、能量收集用户的最小能量收集约束与最大窃听速率约束，以及智能反射平面反射系数的模一约束。由于存在两个智能反射平面之间的反射链路，所构建优化问题的优化变量高度耦合，难以直接求解。提出一种基于交替优化、半正定松弛和连续凸逼近的算法求问题的次优解。仿真结果表明，与现有的基准方案相比，所提算法能在保证信息传输安全和满足能量传输要求的情况下大幅提高系统的总数据速率。

Abstract

Two intelligent reflecting surfaces (IRS) was applied to ensure the physical layer security of the information transmission in a simultaneous wireless information and power transfer (SWIPT) system

where a multi-antenna base station (BS) simultaneously transmits information and energy to multiple single-antenna information receivers (IR) and energy receivers (ER) and the ERs are regarded as potential information eavesdroppers.The system deploys two IRSs to ensure the security of information transmission while meeting the requirements of energy transmission.Due to the inter-IRS signal reflection

the variables of the considered optimization problem are highly coupled

thus the problem is difficult to solve.To tackle this difficulty

an algorithm based on the alternating optimization

semidefinite relaxation

and successive convex approximation methods was proposed to obtain a suboptimal solution to the problem.Simulation results show that the proposed algorithm can significantly increase the total rate of the IRs and guarantee the security of the information transmission and the requirement of energy transmission

as compared to some existing benchmark schemes.

关键词

Keywords

references

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