论文标题
可重新配置的智能表面增强NOMA辅助反向散射通信系统
Reconfigurable Intelligent Surface Enhanced NOMA Assisted Backscatter Communication System
论文作者
论文摘要
考虑了可重新配置的智能表面（RIS）增强的非正交多访问辅助反向散射通信（RIS-NOMABC）系统。对功率反射系数和相移的关节优化问题被制定。为了解决这个非凸问题，通过调用替代优化，连续的凸近似和歧管优化算法提出了低复杂性算法。数值结果证实了提出的 RIS-NOMABC系统的表现优于传统的非正交多访问辅助反向散射通信（NOMABC）无RIS的系统，并证明了拟议算法的可行性和有效性。
A reconfigurable intelligent surface (RIS) enhanced non-orthogonal multiple access assisted backscatter communication (RIS-NOMABC) system is considered. A joint optimization problem over power reflection coefficients and phase shifts is formulated. To solve this non-convex problem, a low complexity algorithm is proposed by invoking the alternative optimization, successive convex approximation and manifold optimization algorithms. Numerical results corroborate that the proposed RIS-NOMABC system outperforms the conventional non-orthogonal multiple access assisted backscatter communication (NOMABC) system without RIS, and demonstrate the feasibility and effectiveness of the proposed algorithm.
