Movable Antenna Aided Physical Layer Security with No Eavesdropper CSI
Zhenqiao Cheng, Chongjun Ouyang, and Xingqi Zhang

TL;DR
This paper introduces a movable antenna system that enhances physical layer security by optimizing antenna positions and joint beamforming without needing eavesdropper CSI, outperforming fixed antennas.
Contribution
It proposes a novel movable antenna framework with a joint beamforming and jamming scheme that improves secrecy rates without eavesdropper CSI.
Findings
MA-based framework outperforms fixed antennas in security
Gradient-based method effectively optimizes antenna positions
Enhanced secrecy transmission rate demonstrated through simulations
Abstract
A novel movable antenna (MA)-aided secure transmission framework is proposed to enhance the secrecy transmission rate without relying on the eavesdropper's channel state information. Within this framework, a joint beamforming and jamming scheme is proposed, where the power of the confidential signal is minimized by optimizing the positions of the MAs, and the residual power is used to jam the eavesdropper. An efficient gradient-based method is employed to solve this non-convex problem. Numerical results are provided to demonstrate the superiority of the MA-based framework over systems using traditional fixed-position antennas in secure transmission.
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Taxonomy
TopicsWireless Communication Security Techniques · Advanced Wireless Communication Technologies · Cryptographic Implementations and Security
