Analysis of Multi-ray Propagation for DSRC Communication on Street with RISs on Sidewalls

Each element in the Reconfigurable Intelligent Sur-faces (RISs) can independently change the phase (or/and) amplitude of the incident signal, so the RISs can be used to enable users to better receive the signal transmitted by the transmitter. In this paper, a Multi-ray propagation model for RISs-assisted dedicated short-range communication (DSRC) system is presented and analyzed on street. The 3-D geometry and image techniques in ray tracing are combined to build the proposed model. This method could enhance the ray-tracing algorithm in RISs-assisted communication networks. In addition, the envelope strength of the received signal is analyzed and verified in our experiments by regulating phase of RISs in two cases. Different reflection times on transmitted signal wave bring different envelope strength of the received signal. The simulation results show that different reflection times and adjustment angles directly affect the received signal strength.