Movable-Antenna Aided Secure Transmission for RIS-ISAC Systems
Yaodong Ma, Kai Liu, Yanming Liu, Lipeng Zhu, and Zhenyu Xiao

TL;DR
This paper proposes a novel approach using movable antennas and reconfigurable surfaces to improve physical layer security in integrated sensing and communication systems, effectively reducing eavesdropping risks.
Contribution
It introduces a joint optimization framework for antenna positions, beamformers, and RIS reflection to enhance security and system performance in RIS-ISAC systems.
Findings
Movable antennas significantly improve security performance.
The proposed algorithm effectively balances secrecy, sensing, and communication requirements.
Simulation results show superior performance over fixed-position antenna systems.
Abstract
Integrated sensing and communication (ISAC) systems have the issue of secrecy leakage when using the ISAC waveforms for sensing, thus posing a potential risk for eavesdropping. To address this problem, we propose to employ movable antennas (MAs) and reconfigurable intelligent surface (RIS) to enhance the physical layer security (PLS) performance of ISAC systems, where an eavesdropping target potentially wiretaps the signals transmitted by the base station (BS). To evaluate the synergistic performance gain provided by MAs and RIS, we formulate an optimization problem for maximizing the sum-rate of the users by jointly optimizing the transmit/receive beamformers of the BS, the reflection coefficients of the RIS, and the positions of MAs at communication users, subject to a minimum communication rate requirement for each user, a minimum radar sensing requirement, and a maximum secrecy…
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Taxonomy
TopicsSatellite Communication Systems · Energy Harvesting in Wireless Networks · Advanced Wireless Communication Technologies
