Reconfigurable Intelligent Surfaces Aided Wireless Communications with Electromagnetic Interference

Controlling the electromagnetic signals’ features of scattering, reflection, and refraction is possible using reconfigurable intelligent surfaces (RIS). In this study, we examined the data rate performance utilizing a codebook technique to produce a set of pre-designed phase shift configurations for the RIS elements. This arrangement has previously been investigated without taking into account electromagnetic interference (EMI), which consists of the inescapable incoming waves from outside sources. We analyzed the system model considering the EMI for single-user SISO wideband communication system. We developed the power method to get a high-quality optimized configuration for the RIS besides using the old water pouring algorithm to fairly allocate the power for all orthogonal frequency division multiplexing (OFDM) subcarriers. Communication performance is significantly impacted by electromagnetic interference, particularly as the RIS becomes bigger.