Performance Analysis of Reconfigurable Intelligent Surface Assisted Two-Way NOMA Networks

This article investigates the performance of reconfigurable intelligent surface assisted two-way non-orthogonal multiple access (RIS-TW-NOMA) networks, where a pair users exchange their information through RIS. The influence imperfect successive interference cancellation on RIS-TW-NOMA is taken into account. To evaluate potential RIS-TW-NOMA, we derive exact and asymptotic expressions outage probability ergodic rate for users. Based analytical results, diversity orders high signal-to-noise ratio (SNR) slopes are obtained in SNR regime, which closely related to number RIS elements. Additionally, analyze system throughput energy efficiency networks both delay-limited delay-tolerant transmission modes. Numerical results indicate that: 1) behaviors superior that RIS-TW-OMA relay OMA (TWR-OMA); 2) As elements increases, capable achieving enhanced performance; 3) By comparing with TWR-OMA has obvious advantages.