RIS-Assisted NOMA Communication Under Phase and SIC Imperfections

Attend a technical lecture exploring the integration of reconfigurable intelligent surfaces (RIS) and non-orthogonal multiple access (NOMA) technologies for next-generation wireless communication systems. Learn about the challenges posed by hardware impairments in RIS that lead to imperfect phase compensation and how imperfect successive interference cancellation (SIC) in NOMA systems can significantly degrade communication performance. Discover how to derive suitable bounds for RIS-assisted NOMA communication systems operating under these imperfections and understand their application in user pairing and power allocation strategies to enhance spectral efficiency. Explore innovative user pairing algorithms designed for hybrid OMA-NOMA systems that intelligently default to OMA when achievable sum rate gains fall below specified thresholds, thereby reducing system complexity. Examine numerical results demonstrating the effectiveness of proposed algorithms compared to state-of-the-art approaches, gaining insights into practical implementation considerations for 5G and beyond wireless communication networks.