Intelligent omni-surface (IOS), capable of providing service coverage to mobile users (MUs) in a reflective and refractive manner, has recently attracted widespread attention. However, the performance of power-domain IOS-assisted systems is limited by the intimate coupling between the refraction and reflection behavior of IOS elements. In this paper, we introduce the concept of dual-polarized IOS-assisted communication to overcome this challenge. By employing the polarization domain in the design of IOS, full independent refraction and reflection modes can be delivered. We consider a downlink dual-polarized IOS-aided system while also accounting for the leakage between different polarizations. To maximize the sum rate, we formulated a joint base station (BS) digital and IOS analog beamforming problem and proposed an iterative algorithm to solve the nonconvex program. Simulation results validate that dual-polarized IOS significantly enhances the performance than that of the power-domain one.
@article{arxiv.2502.03110,
title = {Exploiting Polarization Domain of the IOS for Enhanced Full-Dimensional Transmission},
author = {Weiqiao Zhu and Zizhou Zheng and Yang Yang and Huan Huang and Weijun Hao and Xiaofei Jia and Hongliang Zhang},
journal= {arXiv preprint arXiv:2502.03110},
year = {2025}
}