Joint Radiation Power, Antenna Position, and Beamforming Optimization for Pinching-Antenna Systems with Motion Power Consumption

Xu Y, Xu D, Yu X, Song S, Ding Z, Schober R (2025)

Publication Type: Journal article

Publication year: 2025

Journal

IEEE Transactions on Wireless Communications Institute of Electrical and Electronics Engineers (IEEE)

DOI: 10.1109/TWC.2025.3633833

Abstract

Pinching-antenna systems (PASS) have been recently proposed to improve the performance of wireless networks by reconfiguring both the large-scale and small-scale channel conditions. However, existing studies ignore the physical constraints of antenna placement and assume fixed antenna radiation power. To overcome this limitation, this paper investigates the design of PASS, taking into account the motion power consumption of pinching antennas (PAs) and the impact of adjustable antenna radiation power. To that end, we minimize the average power consumption for a given quality-of-service (QoS) requirement by jointly optimizing the antenna positions, antenna radiation power ratios, and transmit beamforming. To the best of the authors’ knowledge, this is the first work to consider radiation power optimization in PASS, which provides an additional degree of freedom (DoF) for system design. The cases with both continuous and discrete antenna placement are considered, where the main challenge lies in the fact that the antenna positions affect both the magnitude and phase of the channel coefficients of PASS, making system optimization very challenging. To tackle the resulting unique obstacles, an alternating direction method of multipliers (ADMM)-based framework is proposed to solve the problem for continuous antenna movement, while its discrete counterpart is formulated as a mixed integer nonlinear programming (MINLP) problem and solved by the block coordinate descent (BCD) method. Simulation results validate the performance enhancement achieved by incorporating PA movement power consumption and adjustable radiation power into the PASS design, while also demonstrating the efficiency of the proposed optimization framework. The benefits of PASS over conventional multiple-input multiple-output (MIMO) systems in mitigating the large-scale path loss and inter-user interference are also revealed.

Authors with CRIS profile

Robert Schober Lehrstuhl für Digitale Übertragung (IDC)

Involved external institutions

Hong Kong University of Science and Technology (HKUST) / 香港科技大學 CN China (CN) City University of Hong Kong (CityU) CN China (CN) Khalifa University of Science, Technology & Research (KUSTAR) / جامعة خليفة AE United Arab Emirates (AE)

How to cite

APA:

Xu, Y., Xu, D., Yu, X., Song, S., Ding, Z., & Schober, R. (2025). Joint Radiation Power, Antenna Position, and Beamforming Optimization for Pinching-Antenna Systems with Motion Power Consumption. IEEE Transactions on Wireless Communications. https://doi.org/10.1109/TWC.2025.3633833

MLA:

Xu, Yiming, et al. "Joint Radiation Power, Antenna Position, and Beamforming Optimization for Pinching-Antenna Systems with Motion Power Consumption." IEEE Transactions on Wireless Communications (2025).

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