无线电通信技术2025，Vol.51Issue(5)：967-975,9.DOI:10.3969/j.issn.1003-3114.2025.05.010
智能超表面辅助的NOMA系统定位性能优化
Positioning Performance Optimization for Reconfigurable Intelligent Surface Assisted NOMA System
摘要
Abstract
In smart grids,the presence of numerous high-power electrical devices and communication sensing equipment severe-ly hinders signal transmission in positioning systems.To address the challenge of accurately locating weak signals in a Reconfigurable Intelligent Surface(RIS)-assisted Non-Orthogonal Multiple Access(NOMA)system under interference from multiple base stations and communication users,this paper considers the impact of multiple small base stations and multiple users in a smart grid environ-ment.A horizontal positioning error of the target user is used as the evaluation metric.While ensuring the Quality of Service(QoS)for communication users,the proposed method jointly optimizes base station power,multi-user interference,and power allocation fac-tors.The Lagrangian dual method and sub-gradient approach are employed to solve the non-convex optimization problem caused by multiple users and small base stations.Simulation results demonstrate that,under the same resource allocation,the proposed RIS-NOMA integrated sensing and communication system significantly reduces the average positioning error compared to traditional NO-MA-based system.关键词
非正交多址接入/智能电网/可重构智能超表面/次梯度Key words
NOMA/smart grid/RIS/sub-gradient分类
信息技术与安全科学引用本文复制引用
段潇蓉,马军伟,赵敏,张得路,李美玲..智能超表面辅助的NOMA系统定位性能优化[J].无线电通信技术,2025,51(5):967-975,9.基金项目
国网山西省电力公司科技项目(52051C24000D)Science and Technology Project of State Grid Shanxi Electric Power Company(52051C2400D) （52051C24000D）
