In this paper, we consider a reconfigurable intelligent surface (RIS)-aided wireless communication without a direct link. The large-scale path loss model, and residual hardware impairment (RHI), taking into account the physical characteristics of RIS,...
In this paper, we consider a reconfigurable intelligent surface (RIS)-aided wireless communication without a direct link. The large-scale path loss model, and residual hardware impairment (RHI), taking into account the physical characteristics of RIS, and practical nature of transceiver equipment, respectively, are considered. By employing the Rayleigh distribution for small-scale fading and the central limit theorem (CLT) approximation for number of reflecting surfaces, we derive the distribution of SNR, and consequently, the tractable expression of ergodic achievable rate for the analysis. We analyze the factors, including effective incident angle and size of RIS, and number of reflecting surfaces, and RHI Level, that influence the ergodic achievable rate, by simulation results.