Design and Practical Validation of a Novel Modulation Scheme for RIS Detection and Identification

Abstract

The reconfigurable intelligent surfaces detection and identification (RISs-ID) is a critical process that enables a base station (BS) to adaptively assign the appropriate RIS to a given \ac{UE}. This work proposes a novel modulation scheme to enhance the reliability of RIS-ID by reducing the miss-detection ($P_{\text{m}}$) and false-alarm ($P_{\text{f}}$) probabilities. Specifically, we leverage the RIS's passive beamforming gain to enable over-the-air modulation of the RIS ID, combined with passive beam sweeping to extend detection coverage in angular space. Prototype experiments demonstrate the effectiveness of the proposed scheme in reducing $P_{\text{m}}$ and $P_{\text{f}}$ to $10^{-3}$ across different operating points.

Published in IEEE Wireless Communications Letters, 5 pages and 8 figures