RIS-Aided downlink Cooperative NOMA System Performance Analysis

Integration of Re-configurable Intelligent Surfaces with Cooperative Non-Orthogonal Multiple Access signifies a transformable advancement in wireless communication systems, offering substantial improvements in spectral efficiency and reliability. The paper outlines the performance metrics of a RIS aided CNOMA system, specifically focusing on Outage Probability (OP), Bit Error Rate (BER) and energy efficiency(EE). It provides essential insights into the potential advantages and challenges linked to this innovative paradigm. Successive Interference Cancellation technique in CNOMA allows to efficient allocation of resources, thereby improving spectral efficiency and user fairness. The analysis focuses on the impact of critical RIS deployment parameters, including the number of reflecting elements, on system performance. This is evaluated using Outage Probability, BER and Channel State Information considering both perfect and imperfect channels. RIS enhances the wireless environment by providing an extra layer of adaptability through the intelligent control of signal propagation using passive reflecting elements.