A pinching antenna system (PASS) assisted cell-free communication system is proposed. A sum rate maximization problem under the BS power budget constraint and PA deployment constraint is formulated. To tackle the proposed non-convex optimization problem, an alternating optimization (AO) algorithm is developed. In particular, the digital beamforming sub-problem is solved using the weighted minimum mean square error (WMMSE) method, whereas the pinching beamforming sub-problem is handled via a penalty based approach combined with element-wise optimization. Simulation results demonstrate that: 1) the PASS assisted cell-free systems achieve superior performance over benchmark schemes; 2) increasing the number of PAs per waveguides can improve the advantage of PASS assisted cell-free systems; and 3) the cell-free architecture mitigates the average user rate degradation as the number of users increases.
@article{arxiv.2510.03628,
title = {Pinching Antenna Systems (PASS) for Cell-Free Communications},
author = {Haochen Li and Jiayi Lei and Cheng Zeng and Zhaoming Hu and Chao Dong and Yuanwei Liu},
journal= {arXiv preprint arXiv:2510.03628},
year = {2026}
}