Movable Antenna-Aided Secure Full-Duplex Multi-User Communications
Jingze Ding, Zijian Zhou, Bingli Jiao

TL;DR
This paper introduces movable antennas at a full-duplex base station to enhance physical layer security in multi-user systems, optimizing antenna positions and beamformers to improve secrecy rates against eavesdroppers.
Contribution
It proposes a novel movable antenna architecture and an optimization algorithm to jointly enhance security and system performance in full-duplex multi-user communications.
Findings
Movable antennas outperform fixed antennas in security performance.
The proposed optimization algorithm effectively maximizes secrecy rates.
Simulation confirms improved security with movable antennas.
Abstract
In this paper, we investigate physical layer security (PLS) for full-duplex (FD) multi-user systems. We consider a base station (BS) that operates in FD mode and transmits artificial noise (AN) to simultaneously protect uplink (UL) and downlink (DL) transmissions. Conventional fixed-position antennas (FPAs) at the FD BS struggle to fully exploit spatial degrees of freedom (DoFs) to improve signal reception and suppress interference. To overcome this limitation, we propose a novel FD BS architecture equipped with multiple transmit and receive movable antennas (MAs). The MAs introduce the DoFs in antenna position optimization, which can improve the performance of secure communication systems. To serve users and counter the cooperative interception of multiple eavesdroppers (Eves), we formulate a sum of secrecy rates (SSR) maximization problem to jointly optimize the MA positions, the…
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Taxonomy
TopicsFull-Duplex Wireless Communications · Wireless Communication Security Techniques · Antenna Design and Analysis
MethodsMixing Adam and SGD · Balanced Selection
