论文标题
可重新配置的智能表面辅助双向诺玛网络的性能分析
Performance Analysis of Reconfigurable Intelligent Surface Assisted Two-Way NOMA Networks
论文作者
论文摘要
本文调查了可重构智能表面的性能，辅助双向非正交多访问（RIS-TW-NOMA）网络，一对用户通过RIS来交换他们的信息。考虑到不完美的连续干扰取消对RIS-TW-NOMA的影响。为了评估RIS-TW-NOMA的潜在性能，我们得出了一对用户的中断概率和偏僻率的确切和渐近表达式。基于分析结果，在高SNR状态下获得了多样性顺序和高信噪比（SNR）斜率，这与RIS元素的数量密切相关。此外，我们分析了RIS-TW-NOMA网络的系统吞吐量和能源效率均以延迟限制和耐延迟的传输模式。数值结果表明：1）RIS-TW-NOMA的中断行为和厄法德率优于RIS-TW-soma和Twie-tay Realay Remay OMA（TWR-SOMA）； 2）随着RIS元素数量的增加，RIS-TW-NOMA网络能够达到冲突性能的增强； 3）通过与RIS-TW-soma和TWR-soma网络进行比较，RIS-TW-NOMA的能效和系统吞吐量具有明显的优势。
This paper investigates the performance of reconfigurable intelligent surface assisted two-way non-orthogonal multiple access (RIS-TW-NOMA) networks, where a pair of users exchange their information through a RIS. The influence of imperfect successive interference cancellation on RIS-TW-NOMA is taken into account. To evaluate the potential performance of RIS-TW-NOMA, we derive the exact and asymptotic expressions of outage probability and ergodic rate for a pair of users. Based on the analytical results, the diversity orders and high signal-to-noise ratio (SNR) slopes are obtained in the high SNR regime, which are closely related to the number of RIS elements. Additionally, we analyze the system throughput and energy efficiency of RIS-TW-NOMA networks in both delay-limited and delay-tolerant transmission modes. Numerical results indicate that: 1) The outage behaviors and ergodic rate of RIS-TW-NOMA are superior to that of RIS-TW-OMA and two-way relay OMA (TWR-OMA); 2) As the number of RIS elements increases, the RIS-TW-NOMA networks are capable of achieving the enhanced outage performance; and 3) By comparing with RIS-TW-OMA and TWR-OMA networks, the energy efficiency and system throughput of RIS-TW-NOMA has obvious advantages.
