Target-to-User Association in ISAC Systems With Vehicle-Lodged RIS

Target-to-user (T2U) association is a prerequisite to fully exploit the potential of sensing function in communication-centric integrated and communication (ISAC) systems, e.g., for beam blockage management. This letter proposes purposely mount RIS on roof vehicular user equipment (VUE), which can serve as an intentional back-reflector towards base station. By controlling reflection pattern over time, it possible transmit information system, i.e., back-reflection bit 1, no 0. The VUEs are configured back-reflect Hadamard code sequence, enables T2U association. numerical results confirm validity our proposal.