Performance of RIS-Aided Wireless Systems in the Presence of Mobile Interferers

Reconfigurable intelligent surface (RIS) recently emerged as a promising technology for beyond-5
^th
Generation (B5G)/6
^th
Generation (6G) wireless networks. In this paper, considering random waypoint (RWP) mobility model, we evaluate the performance of RIS-aided mobile destination node in the presence of mobile co-channel interferers (CCI). It is assumed that the source-RIS and RIS-destination links follow Rayleigh distributions. The links between the interferers and the destination node also follow Rayleigh distributions. The performance of the considered system is evaluated by deriving novel closed-form expressions for the outage probability (OP), bit error rate (BER), and average channel capacity (ACC) based on the cumulative distribution function (CDF) of the received signal-to-interference plus noise ratio (SINR). It is shown through numerical results that the presence of mobile interferers significantly degrades the overall performance of the considered system.