Performance Analysis of Rate-Splitting Multiple Access Technique in Impulsive Noise Environments

Rate-splitting multiple access (RSMA) has emerged as a promising multiple access paradigm in wireless communications, offering improved spectral efficiency and user fairness. Despite its advantages, the performance of RSMA in impulsive noise channels has not been investigated. To bridge this gap, we derive exact closed-form expressions for the outage probability (OP) in RSMA schemes over Rayleigh fading channels. The accuracy of the analytical results is verified through numerical simulation. Finally, performance comparison with non-orthogonal multiple access demonstrates that RSMA exhibits superior interference resilience in downlink scenarios, whereas both schemes experience considerable performance degradation in the uplink scenario.