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Movable Antenna Array Aided Ultra Reliable Covert Communications
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In this paper, we construct a framework of the movable antenna (MA) aided covert communication shielded by the general noise uncertainty for the first time. According to the analysis performance on the derived closed-form expressions of the sum of the probabilities of the detection errors and the communication outage probability, the perfect covertness and the ultra reliability can be achieved by adjusting the antenna position in the MA array. Then, we formulate the communication covertness maximization problem with the constraints of the ultra reliability and the independent discrete movable position to optimize the transmitter's parameter. With the maximal ratio transmitting (MRT) design for the beamforming, we solve the closed-form optimal information transmit power and design a lightweight discrete projected gradient descent (DPGD) algorithm to determine the optimal antenna position. The numerical results show that the optimal achievable covertness and the feasible region of the steering angle with the MA array is significant larger than the one with the fixed-position antenna (FPA) array.
Forward citations
Cited by 4 Pith papers
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Movable Antenna Empowered Secure Near-Field MIMO Communications
Movable antenna positions and hybrid beamformers are jointly optimized to maximize secrecy rate in near-field MIMO, achieving secure transmission when the eavesdropper is in the same direction and closer to the base station.
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Does Movable Antenna Present A Dual-edged Nature? From the Perspective of Physical Layer Security: A Joint Design of Fixed-position Antenna and Movable Antenna
A hybrid FPA-MA array with joint position and beamforming optimization is claimed to raise physical-layer secrecy rate by up to 42% over FPA-only and 9% over MA-only baselines, but the analytical and numerical support...
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Can Movable Antenna-enabled Micro-Mobility Replace UAV-enabled Macro-Mobility? A Physical Layer Security Perspective
Movable antenna micro-mobility and UAV macro-mobility offer complementary secrecy rate advantages, with MA winning at low transmit power and UAV winning at high power.
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Advancing Fluid Antenna-Assisted Non-Terrestrial Networks in 6G and Beyond: Fundamentals, State of the Art, and Future Directions
A literature survey of fluid-antenna-assisted non-terrestrial networks; it organizes existing results and identifies future directions but proves no new result.
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