南京邮电大学学报（自然科学版）2025，Vol.45Issue(5)：50-56,7.DOI:10.14132/j.cnki.1673-5439.2025.05.006
可重构折射面辅助下行NOMA系统和速率最大化
Sum rate maximization for RRS-assisted downlink NOMA systems
摘要
Abstract
Reconfigurable refractive surface(RRS)is regarded as a prospective technology for optimiz-ing signal paths and enhancing directional propagation in complex environments,while non-orthogonal multiple access(NOMA)serves as an empowering technology to meet the high spectrum efficiency and large capacity requirements of the next-generation cellular communications.This paper investigates the problem of maximizing the sum rate of the downlink NOMA system assisted by RRS deployed in the near field of the base station(BS).The sum rate is maximized by alternately optimizing the power distribution and the phase shift matrix of the RRS.The Lagrange dual decomposition method is used to optimize the power allocation and then a phase shift rotation in turn(PSRT)method is proposed to optimize the phase shifts of RRS.Simulation results show that the sum rate of RRS-assisted NOMA systems is higher than that of RRS-assisted orthogonal multiple access(OMA)systems,NOMA systems and OMA systems.关键词
可重构折射面/非正交多址接入/和速率Key words
reconfigurable refractive surface(RRS)/non-orthogonal multiple access(NOMA)/sum rate分类
信息技术与安全科学引用本文复制引用
李碧玲,宋荣方..可重构折射面辅助下行NOMA系统和速率最大化[J].南京邮电大学学报（自然科学版）,2025,45(5):50-56,7.基金项目
国家自然科学基金(62171235)资助项目 （62171235）
