Design scheme of physical layer security for intelligent reflecting surface-assisted MISO communication system

Xiaorong JING; Zhenyuan SONG; Wei GAO; Weijia LEI; Qianbin CHEN

doi:10.11959/j.issn.1000-436x.2022018

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Design scheme of physical layer security for intelligent reflecting surface-assisted MISO communication system

Papers | 更新时间：2024-06-05

- Design scheme of physical layer security for intelligent reflecting surface-assisted MISO communication system
- Journal on Communications Vol. 43, Issue 1, Pages: 117-126(2022)
- 作者机构：
  
  1. 重庆邮电大学通信与信息工程学院，重庆 400065
  2. 重庆邮电大学移动通信技术重庆市重点实验室，重庆 400065
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61701062);Chongqing Research Program of Basic Re-search and Frontier Technology(cstc2019jcyj-msxmX0079)
- DOI：10.11959/j.issn.1000-436x.2022018
  CLC： TN929.5
- Online First：2022-01，
  
  Published：25 January 2022
- 稿件说明：
移动端阅览
Xiaorong JING, Zhenyuan SONG, Wei GAO, et al. Design scheme of physical layer security for intelligent reflecting surface-assisted MISO communication system[J]. Journal on Communications, 2022, 43(1): 117-126.
DOI：

Xiaorong JING, Zhenyuan SONG, Wei GAO, et al. Design scheme of physical layer security for intelligent reflecting surface-assisted MISO communication system[J]. Journal on Communications, 2022, 43(1): 117-126. DOI： 10.11959/j.issn.1000-436x.2022018.

摘要

智能反射表面（IRS）可通过调整反射单元的相位来提升无线通信物理层安全。针对 IRS 辅助的多输入单输出（MISO）通信系统，提出一种基于交替迭代的物理层安全设计方案。首先基于安全速率最大化原则，构建一个含有非凸约束的非凸目标函数；然后采用丁克尔巴赫算法和黎曼流形优化算法将非凸问题转化为一系列易于求解的子问题；最后采用交替迭代法实现发送波束成形和IRS相移矩阵的优化设计。仿真结果表明，与现有方案相比，所提方案在计算复杂度与系统安全速率之间取得了更好的折中。

Abstract

Intelligent reflecting surface (IRS) improves the physical layer security of the communication systems by adjusting the phases of the reflecting units.A scheme of physical layer security design based on alternative iteration was proposed for IRS-assisted multiple input single output (MISO) communication system.Firstly

aiming at maximizing the secrecy rate

a non-convex objective function with non-convex constraints was constructed.Secondly

the Dinkelbach algorithm and Riemannian manifold optimization algorithm were adopted to transform the non-convex problem into a series of solvable sub-problems.Finally

the alternate iteration method was used to achieve the optimization design of transmit beamforming and IRS phase shift matrix.The simulation results show that

compared with the several existing schemes

the proposed scheme can achieve a better tradeoff between computational complexity and system security rate.

关键词

Keywords

references

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