Uplink Secure Communication via Intelligent Reflecting Surface and Energy-Harvesting Jammer

被引：2
作者：
Qiao, Tiantian [1 ]
Cao, Yang [1 ]
Tang, Jie [2 ]
Zhao, Nan [1 ]
Wong, Kai-Kit [3 ]
机构：
[1] Dalian Univ Technol, Sch Informat & Commun Engn, Dalian 116024, Peoples R China
[2] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510641, Peoples R China
[3] UCL, Dept Elect & Elect Engn, London WC1E 6BT, England
来源：
2022 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM 2022) | 2022年
基金：
国家重点研发计划;
关键词：
Energy harvesting; intelligent reflecting surface; jamming; physical layer security; time switching;
D O I：
10.1109/GLOBECOM48099.2022.10000693
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this paper, we investigate the uplink secure communication by combining intelligent reflecting surface (IRS) and energy-harvesting (EH) jammer. Specifically, we propose an IRS-aided secure scheme for the uplink transmission via an EH jammer, to fight against the malicious eavesdropper. An energy transfer (ET) phase and an information transmission (IT) phase are proposed in this scheme. In the ET phase, we optimize the phase-shift matrix of IRS to maximize the harvested energy of jammer. In the IT phase, the phase-shift matrix of IRS and time switching factor are jointly optimized to maximize the secrecy rate. To tackle the non-convex problem, we first decompose it into two subproblems to solve by capitalizing on semi-definite relaxation (SDR) and Lagrange duality. Then, the solutions to the original problem can be obtained by alternately optimizing the two subproblems. Simulation results show that the proposed Jammer-IRS assisted secure transmission scheme can significantly enhance the uplink security.
引用
收藏
页码：3247 / 3252
页数：6
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