Utilizing Space-Time Coding Metasurface for FMCW Radar Spoofing in RIS-Assisted Communication Systems

This paper proposes a frequency modulated continuous wave (FMCW) radar spoofing scheme by using spacetime coding metasurface (STCM) in a reconfigurable intelligent surface (RIS)-assisted communication system. Specifically, in this spoofing scheme STCM is employed to induce a time-varying phase to modify the FMCW radar signal frequency. Through frequency decoupling, the proposed scheme can spoof FMCW radar estimations of distance as well as velocity, and thus achieves the spoofing attack. Finally, we validate the performance of the proposed spoofing scheme through extensive simulations.