Analysis of RIS-Aided CNOMA System with Selection Combining Under Nakagami Fading Channel

Reconfigurable Intelligent Surface technology allows for improved performance in a wireless network. It can intelligently shape the radio environment. The paper delivers a comprehensive analysis of RIS-enabled cooperative NOMA systems. The CNOMA system operating over a Nakagami-m fading channel. The study investigates the use of the Selection Combining (SC) diversity technique at the receiver to enhance signal reliability and reduce outage Probability. Analytical and simulation results are derived to evaluate system the behavior of users located near and far from the base station. The study demonstrates that integrating RIS significantly enhances the outage performance compared to conventional Cooperative NOMA systems, while the SC technique further strengthens link quality with moderate complexity. Overall, the proposed RISCNOMA model with selection combining proves to be a reliable and energy-efficient approach for future wireless communication networks.