Abstract
This letter explores a reconfigurable intelligent surfaces (RISs) assisted multi-user ultra-reliable low-latency communication (URLLC) system in presence of electromagnetic interference (EMI). The spatial correlation among the channels corresponding to the RIS meta-atoms is considered. For downlink communication, source selects a user out of arbitrary <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${K}$ </tex-math></inline-formula> users through random or absolute channel power based (CPB) scheduling schemes. We derive the closed form expressions for outage probability, block error rate (BLER), capacity and system goodput for both the scheduling schemes under the assumption of imperfect channel state information (CSI). Moreover, asymptotic expression for outage probability is also derived. The correctness of the derived expressions is verified through Monte-Carlo simulations.
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