Intelligent Reflecting Surface Aided Multi-Antenna Secure Transmission

In this letter, we propose intelligent reflecting surface (IRS) aided multi-antenna physical layer security. We present a power efficient scheme to design the secure transmit power allocation and the surface reflecting phase shift. It aims to minimize the transmit power subject to the secrecy rate c...

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Bibliographic Details
Published in:IEEE wireless communications letters Vol. 9; no. 1; pp. 108 - 112
Main Authors: Chu, Zheng, Hao, Wanming, Xiao, Pei, Shi, Jia
Format: Journal Article
Language:English
Published: Piscataway IEEE 01.01.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Antennas
Closed-form solutions
Computer simulation
Eigenvalues and eigenfunctions
Intelligent reflecting surface
Optimization
phase shift
Physical layer security
physical-layer secrecy
Power management
Programming
Reconfigurable intelligent surfaces
Resource management
secure beamforming
Semidefinite programming
Signal processing algorithms
ISSN:2162-2337, 2162-2345
Online Access:Get full text
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Summary:In this letter, we propose intelligent reflecting surface (IRS) aided multi-antenna physical layer security. We present a power efficient scheme to design the secure transmit power allocation and the surface reflecting phase shift. It aims to minimize the transmit power subject to the secrecy rate constraint at the legitimate user. Due to the non-convex nature of the formulated problem, we propose an alternative optimization algorithm and the semidefinite programming (SDP) relaxation to deal with this issue. Also, the closed-form expression of the optimal secure beamformer is derived. Finally, simulation results are presented to validate the proposed algorithm, which highlights the performance gains of the IRS to improve the secure transmission.
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ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2019.2943559