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arXiv · 2502.14250

A Low-Complexity Placement Design of Pinching-Antenna Systems

Ximing Xie·Fang Fang·Zhiguo Ding·Xianbin Wang
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Abstract

Pinching-antenna systems have recently been proposed as a new candidate for flexible-antenna systems, not only inheriting the reconfiguration capability but also offering a unique feature: establishing line-of-sight links to mitigate large-scale path loss. However, sophisticated optimization of the placement of pinching antennas has very high complexity, which is challenging for practical implementation. This paper proposes a low-complexity placement design, providing the closed-form expression of the placement of pinching antennas, to maximize the sum rate of multiple downlink users. Orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA) are both investigated when the pinching-antenna system is only equipped with a single antenna and only the OMA case is studied when there are multiple antennas equipped by the pinching-antenna system. Simulation results indicate pinching-antenna systems can outperform conventional fixed-antenna systems and are more suitable for large service areas.

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Ximing Xie, Fang Fang, Zhiguo Ding, Xianbin Wang. 2025-02-20. A Low-Complexity Placement Design of Pinching-Antenna Systems. https://arxiv.org/abs/2502.14250

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