Study on IRS-assisted WPT Communication System with Phase Errors

Abstract

In this paper, the outage probability (OP) and symbol error rate (SER) performance of an intelligent reflecting surface (IRS) aided wireless power transfer wireless system in the Rayleigh fading channel are discussed. In the considered system, energy source (ES) sends radio frequency (RF) signals to the source node with the help of IRS. Source harvests energy from the RF signals sent by ES and uses the harvested energy to communicate with the destination node. Specifically, we consider two phase adjustment situations in the IRS, i.e., perfect phase and one-bit phase. The expressions on the OP and SER for the two cases are derived. The effects of the number of reflecting elements, transfer power, energy conversion efficiency, and phase error are investigated to shed lights on the system design. Finally, Numerical results and Monte-Carlo simulations are provided to verify the correctness of the theoretical analysis.