Two-Timescale Joint Transmit and Pinching Beamforming for Pinching-Antenna Systems
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908332978077696 |
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| author | Zhang, Luyuan Mu, Xidong Liu, An Liu, Yuanwei |
| author_facet | Zhang, Luyuan Mu, Xidong Liu, An Liu, Yuanwei |
| contents | Pinching antenna systems (PASS) have been proposed as a revolutionary flexible antenna technology which facilitates line-of-sight links via numerous low-cost pinching antennas with adjustable activation positions over waveguides. This letter proposes a two-timescale joint transmit and pinching beamforming design for the maximization of sum rate of a PASS-based downlink multi-user multiple input single output system. A primal dual decomposition method is developed to decouple the two-timescale problem into two sub-problems: 1) A Karush-Kuhn-Tucker-guided dual learning-based approach is proposed to solve the short-term transmit beamforming design sub-problem; 2) The long-term pinching beamforming design sub-problem is tackled by adopting a stochastic successive convex approximation method. Simulation results demonstrate that the proposed two-timescale algorithm achieves a significant performance gain compared to other baselines. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_16099 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Two-Timescale Joint Transmit and Pinching Beamforming for Pinching-Antenna Systems Zhang, Luyuan Mu, Xidong Liu, An Liu, Yuanwei Signal Processing Artificial Intelligence Information Theory Pinching antenna systems (PASS) have been proposed as a revolutionary flexible antenna technology which facilitates line-of-sight links via numerous low-cost pinching antennas with adjustable activation positions over waveguides. This letter proposes a two-timescale joint transmit and pinching beamforming design for the maximization of sum rate of a PASS-based downlink multi-user multiple input single output system. A primal dual decomposition method is developed to decouple the two-timescale problem into two sub-problems: 1) A Karush-Kuhn-Tucker-guided dual learning-based approach is proposed to solve the short-term transmit beamforming design sub-problem; 2) The long-term pinching beamforming design sub-problem is tackled by adopting a stochastic successive convex approximation method. Simulation results demonstrate that the proposed two-timescale algorithm achieves a significant performance gain compared to other baselines. |
| title | Two-Timescale Joint Transmit and Pinching Beamforming for Pinching-Antenna Systems |
| topic | Signal Processing Artificial Intelligence Information Theory |
| url | https://arxiv.org/abs/2504.16099 |