Reconfigurable intelligent surface (RIS)-assisted communication is a key enabling technology for next-generation wireless communication networks, allowing for the reshaping of wireless channels without requiring traditional radio frequency (RF) active components. While their passive nature makes RISs highly attractive, it also presents a challenge: RISs cannot actively identify themselves to user equipments (UEs). Recently, a new method has been proposed to detect and identify RISs by letting them modulate their identities in the signals reflected from their surfaces. In this letter, we first propose a new and simpler modulation method for RISs and then validate the concept of RIS detection and identification (RIS-ID) using a real-world experimental setup. The obtained results validate the RIS-ID concept and show the effectiveness of our proposed modulation method over different operating scenarios and systems settings.

翻译：可重构智能表面辅助通信是下一代无线通信网络的关键使能技术，它能够在无需传统射频有源组件的情况下重塑无线信道。尽管其无源特性使RIS极具吸引力，但也带来了一项挑战：RIS无法主动向用户设备标识自身。最近，一种新方法被提出，通过让RIS在其表面反射信号中调制身份信息来实现RIS的检测与识别。本文首先提出了一种新颖且更简单的RIS调制方法，随后通过真实实验装置验证了RIS检测与识别概念。所得结果证实了RIS-ID概念的可行性，并展示了我们提出的调制方法在不同操作场景和系统配置下的有效性。