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Impact Factor:4.6
Affiliation of Author(s):School of Computer Science and Information Engineering, Hefei University of Technology
Journal:IEEE Wireless Communications Letters
Funded by:the National Natural Science Foundation of China under Grant 61971176
Key Words:Proactive eavesdropping, active reconfigurable intelligent surface, double fading, eavesdropping rate
Abstract:This letter attempts to design a surveillance scheme by adopting an active reconfigurable intelligent surface (RIS). Different from the conventional passive RIS, the active RIS could not only adjust the phase shift but also amplify the amplitude of the reflected signal. With such reflecting, the reflected signal of active RIS could jointly adjust the signal to noise ratio (SNR) of the suspicious receiver and the legitimate monitor, hence the proactive eavesdropping at the physical layer could be effectively realized. We formulate the optimization problem with the target of maximizing the eavesdropping rate to obtain the optimal reflecting coefficient matrix of the active RIS. The formulated optimization problem is nonconvex fractional programming and challenging to deal with. We then solve the problem by approximating it as a series of convex constraints. Simulation results validate the effectiveness of our designed surveillance scheme and show that the proposed active RIS aided surveillance scheme has good performance in terms of eavesdropping rate compared with the scheme with passive RIS.
Co-author:Yibo Yi,Hongwei Zhang,Kun Li
First Author:Xinyue Hu
Indexed by:Essay collection
Correspondence Author:Caihong Kai
Discipline:Engineering
Document Type:J
Volume:12
Issue:2
Page Number:356-360
ISSN No.:2162-2345
Translation or Not:no
Date of Publication:2022-12-07
Included Journals:SCI、EI