通信学报2025，Vol.46Issue(4)：213-223,11.DOI:10.11959/j.issn.1000-436x.2025058
智能超表面与惯性测量单元联合辅助的室内定位方法设计
Design of indoor positioning method jointly assisted by RIS and IMU
摘要
Abstract
To address the issue of excessive pilot overheads in reconfigurable intelligent surface(RIS)-assisted position-ing techniques,a joint RIS and inertial measurement unit(IMU)-assisted indoor positioning method was proposed,aim-ing to achieve continuous and accurate positioning for a indoor mobile user equipment(UE).Firstly,the measurement data provided by the IMU was used as a piece of priori location information to guide the fine-grained phase shift configu-ration of the RIS,thereby reducing the overheads required for channel parameter estimation.Then,the factor graph opti-mization approach was applied to integrate the IMU's measurement data with the phase shifts of the RIS,constructing an optimization problem for position estimation.Finally,the Levenberg-Marquardt algorithm was employed to solve the optimization problem and estimate the UE's position.After that,the IMU data was calibrated and errors were compen-sated,both based on the fused positioning results.Simulation results demonstrate that the proposed method offers higher positioning accuracy and requires less pilot overheads compared to existing methods.关键词
室内定位/智能超表面/惯性测量单元/因子图优化Key words
indoor positioning/RIS/IMU/factor graph optimization分类
信息技术与安全科学引用本文复制引用
孙巍,杜鑫,宋清洋,郭磊..智能超表面与惯性测量单元联合辅助的室内定位方法设计[J].通信学报,2025,46(4):213-223,11.基金项目
国家自然科学基金资助项目(No.62025105,No.62201104) （No.62025105,No.62201104）
中国博士后科学基金资助项目(No.2024MD764070) （No.2024MD764070）
重庆市自然科学基金资助项目(No.CSTB2024NSCQ-MSX1092) The National Natural Science Foundation of China(No.62025105,No.62201104),China Postdoctoral Science Foundation(No.2024MD764070),The Natural Science Foundation of Chongqing Municipality(No.CSTB2024NSCQ-MSX1092) （No.CSTB2024NSCQ-MSX1092）
