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arXiv · 2501.04490

Rotatable and Movable Antenna-Enabled Near-Field Integrated Sensing and Communication

Yunan Sun·Hao Xu·Chongjun Ouyang·Hongwen Yang
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Abstract

The aim of this article is to investigate the performance of near-field integrated sensing and communication (ISAC) systems using rotatable movable antennas (RMAs). In the proposed RMA-enabled system, the positions and rotations of antennas at the base station (BS) are dynamically adjusted to enhance both communication and sensing capabilities. Two designs are explored: i) a sensing-centric design that minimizes the Cram$\text{\'e}$r-Rao bound (CRB) with signal-to-interference-plus-noise ratio (SINR) constraints, and ii) a communication-centric design that maximizes the sum-rate with a CRB constraint. To solve the formulated optimization problems, two alternating optimization (AO)-based algorithms are proposed capitalizing on the semidefinite relaxation (SDR) method and the particle swarm optimization (PSO) method. Numerical results demonstrate that: i) the proposed RMA-enabled system outperforms the conventional fixed-position antenna and non-rotatable movable antenna systems in both sensing-centric and communication-centric designs and RMAs' rotations show a higher performance gain in communication-centric design; ii) the proposed optimization methods achieve the Pareto boundary in both sensing-centric and communication-centric designs.

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Yunan Sun, Hao Xu, Chongjun Ouyang, Hongwen Yang. 2025-01-08. Rotatable and Movable Antenna-Enabled Near-Field Integrated Sensing and Communication. https://doi.org/10.1109/jiot.2025.3598721

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