STAR-RIS辅助的NOMA系统物理层安全性能优化
Performance optimization of physical layer security in STAR-RIS aided NOMA system
李美玲 1王玉旻 1王思敬 1张海君2
作者信息
- 1. 太原科技大学电子信息工程学院,山西 太原 030024
- 2. 北京科技大学计算机与通信工程学院,北京 100083
- 折叠
摘要
针对实际通信场景中非理想信道状态信息以及非理想串行干扰删除等非理想因素的强耦合特性使可同时反射和透射的可重构智能超表面(STAR-RIS)辅助的非正交多址接入(NOMA)传输系统安全性能无法准确衡量的问题,提出了基于惩罚对偶分解(PDD)和块坐标下降(BCD)的融合算法,联合优化基站的波束成形矢量和STAR-RIS相移系数,实现系统最低安全传输速率的最大化.结果表明,所提融合算法相比BCD算法可以明显增加最低安全传输速率,性能至少提升10%.
Abstract
The strong coupling characteristics of the imperfect channel state information and the imperfect successive in-terference cancellation makes it faces the great challenge in evaluating the secure performance accurately for the simulta-neously transmitting and reflecting reconfigurable intelligent surface(STAR-RIS)aided non-orthogonal multiple access(NOMA)transmission systems.To address this issue,a mixed algorithm based on penalty dual decomposition(PDD)and block coordinate descent(BCD)was proposed for optimizing the beamforming vectors at the base station and the phase-shift coefficients of the STAR-RIS jointly,aiming to maximize the minimum secure transmission rate of the sys-tem.The results demonstrate that minimum secure transmission rate can be significantly enhanced by the proposed mixed algorithm compared to that by BCD algorithm,achieving the performance improvement by at least 10%.
关键词
可同时反射和透射的可重构智能超表面/非正交多址接入/物理层安全/块坐标下降/惩罚对偶分解Key words
simultaneously transmitting and reflecting reconfigurable intelligent surface/non-orthgonal multiple access/physical layer security/block coordinate descent/penalty dual decomposition引用本文复制引用
基金项目
国家自然科学基金(62001320)
山西省科技创新人才团队专项(202304051001035)
山西省科技成果转化引导专项(202204021301055)
山西省专利转化专项(202302003)
山西省留学回国人员科研项目(2021-133)
山西省科研实践创新类基金(2023KY647)
出版年
2024
国家科技期刊平台
NSTL
万方数据