Physical Layer Security for Hybrid Reconfigurable Intelligent Surface and Artificial Noise Assisted Communication

DENG Zhixiang; DAI Chenqing; ZHANG Zhiwei

doi:10.11999/JEIT231235

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DENG Zhixiang, DAI Chenqing, ZHANG Zhiwei. Physical Layer Security for Hybrid Reconfigurable Intelligent Surface and Artificial Noise Assisted Communication[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT231235

Citation:

DENG Zhixiang, DAI Chenqing, ZHANG Zhiwei. Physical Layer Security for Hybrid Reconfigurable Intelligent Surface and Artificial Noise Assisted Communication[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT231235

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Physical Layer Security for Hybrid Reconfigurable Intelligent Surface and Artificial Noise Assisted Communication

doi: 10.11999/JEIT231235

1.
Jiangsu Key Laboratory of Power Transmission & Distribution Equipment Technology, Hohai University, Changzhou 213251, China
2.
College of Information Science and Engineering, Hohai University, Changzhou 213251, China

Funds: The Jiangsu Key Laboratory of Power Transmission & Distribution Equipment Technology (2022JSSPD03)

Received Date: 2023-11-07
Rev Recd Date: 2024-04-08

Available Online: 2024-04-29

Abstract

Abstract

A hybrid active-passive Reconfigurable Intelligent reflecting Surface (RIS) and Artificial Noise (AN) based transmission scheme is proposed for the secret communication of the RIS assisted wireless communication system. Aiming at maximizing the secrecy rate, a joint optimization problem over the transmit beamforming and AN vector of the base station and the reflecting coefficient matrix of the RIS is formulated. Then, the Alternating Optimization (AO) method, the weighted Minimum Mean Square Error (MMSE) algorithm and the semi-definite relaxation algorithm are proposed to solve this non-convex optimization problem with highly-coupled variables. The simulation results show that the proposed hybrid RIS and AN based scheme can efficiently improve the secrecy rate of the considered system and overcome the secrecy rate decrease due to the "double fading" effect of the passive RIS. Compared with the full active RIS, the proposed scheme achieves higher energy efficiency.
- Reconfigurable Intelligent Reflecting Surface,
- Hybrid active-passive RIS,
- Physical layer security,
- Artificial noise,
- Alternating optimization,
- Semi-definite relaxation

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References(27)

References

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