一种5G辅助地磁匹配的室内定位方法  

An indoor positioning method with 5G-assisted geomagnetic matching

作　　者：杨朝永 赵冬青[1] 郭文卓 赖路广 张乐添 贾晓雪 YANG Chaoyong;ZHAO Dongqing;GUO Wenzhuo;LAI Luguang;ZHANG Letian;JIA Xiaoxue(School of Geospatial Information,Strategic Support Force Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]战略支援部队信息工程大学地理空间信息学院,河南郑州450001

出　　处：《山东科技大学学报（自然科学版）》2023年第3期26-34,共9页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(41774037,42104033)。

摘　　要：针对地磁匹配存在误匹配、定位误差较大等情况,提出一种5G信号辅助地磁匹配的定位方法,利用5G的CSI粗定位约束地磁匹配范围,从而获得较高的定位精度。分析了5G信号和地磁匹配定位的不同特点,并利用BP神经网络对5G信号进行粗定位,再以该结果作为约束条件筛选地磁匹配区域,然后在该区域利用动态时间规整算法进行地磁匹配,实现5G辅助下的高精度地磁匹配定位。实验结果表明,基于5G的CSI的单基站定位方式的精度约为2~3 m,5G辅助地磁匹配的组合定位可有效解决地磁误匹配问题,平均误差在1 m以内,能够满足大多场景下室内定位的需求。In view of the geomagnetic mismatching and large positioning errors,a 5G-assisted geomagnetic matching positioning method was proposed,in which higher positioning accuracy could be achieved by limiting the range of geomagnetic matching with 5G channel state information(5G CSI)rough positioning.The different characteristics of 5G signals and geomagnetic matching positioning were firstly analyzed.Then,the BP neural network was used to carry out a rough positioning of the 5G signals,the results of which was used as the constraint to screen the geomagnetic matching area.Finally,the dynamic time warping algorithm was used in the area for geomagnetic matching,thus achieving the highly accurate geomagnetic matching positioning assisted by 5G.The experimental results show that the positioning accuracy of the single base station positioning method based on 5G CSI is about 2~3 m,and that the combined positioning of the 5G-assisted geomagnetic matching can effectively overcome geomagnetic mismatching with the average error within 1 m,which can meet the needs of indoor positioning in most situations.

关 键 词：5G 地磁匹配 动态时间规整 信道状态信息 室内定位 

分 类 号：P209[天文地球—测绘科学与技术]