Efficient integration of reconfigurable intelligent surfaces (RISs) into the current wireless network standard is not a trivial task due to the overhead generated by performing channel estimation (CE) and phase-shift optimization. In this paper, we propose a framework enabling the coexistence between orthogonal-frequency division multiplexing (OFDM) and RIS technologies. Instead of wasting communication symbols for the CE and optimization, the proposed framework exploits the localization information obtainable by RIS-aided communications to provide a robust allocation strategy for user multiplexing. The results demonstrate the effectiveness of the proposed approach with respect to CE-based transmission methods.

翻译：将可重构智能表面（RIS）高效集成到现有无线网络标准中并非易事，这主要是由于执行信道估计（CE）和相位偏移优化所产生的额外开销。本文提出了一种使正交频分复用（OFDM）与RIS技术能够共存的框架。该框架并非将通信符号浪费于CE和优化，而是利用通过RIS辅助通信可获取的定位信息，为用户复用提供鲁棒的分配策略。实验结果表明，与基于CE的传输方法相比，所提方法具有显著有效性。