基于多径辅助的AOA-TOA三维单站定位方法研究  

Research on three-dimensional single station localization method based on multipath-assisted AOA-TOA

作　　者：王洋[1] 曾伟[1] 廖希 王森 林峰 梁吉申 WANG Yang;ZENG Wei;LIAO Xi;WANG Sen;LIN Feng;LIANG Ji Shen(School of Communications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,P.R.China;Chongqing Communication Institute,Army Engineering University of PLA,Chongqing 400035,P.R.China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]中国人民解放军陆军工程大学通信士官学校,重庆400035

出　　处：《重庆邮电大学学报（自然科学版）》2024年第6期1071-1078,共8页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金项目(62271095,62171071);重庆市自然科学基金面上项目(ctsc2021jcyj-msxmX0634,cstb2022nscq-msx1125)。

摘　　要：为解决城市非视距(non line of sight,NLOS)环境下三维单站定位方法精度低和需要先验信息的问题,提出基于多径信号到达角度(angle of arrival,AOA)和到达时间(time of arrival,TOA)的三维单站定位方法。利用移动基站在不同位置上的多径AOA估计散射中心位置;利用散射中心的多径TOA构建定位目标函数,并通过散射中心位置对目标位置进行约束,将定位问题转换为带约束的优化问题;利用列文伯格-马夸尔特(Levenberg Marquardt,LM)算法求解目标位置。仿真结果表明,所提方法在无需额外环境先验信息情况下,较对比算法提高了定位精度。To mitigate the challenges posed by low accuracy and the prerequisite of prior information in 3D single-station positioning methods within urban non-line-of-sight(NLOS)environments,this study introduces a novel approach utilizing the angle of arrival(AOA)and time of arrival(TOA)of multipath signals for 3D single-station positioning.Firstly,scatter center positions are estimated by leveraging multipath angle of arrival(AOA)measurements obtained from a mobile base station at different locations.Secondly,an objective function for positioning is constructed utilizing the multipath time of arrival(TOA)from scatter centers.The positioning problem is then transformed into a constrained optimization problem by imposing constraints based on the scatter center positions.Finally,the target position is computed using the Levenberg-Marquardt(LM)algorithm.Simulation results demonstrate that the proposed method enhances positioning accuracy compared to the comparative algorithms without requiring additional prior environmental information.

关 键 词：三维单站定位 城市非视距环境 先验信息 多径信号 

分 类 号：TN929.5[电子电信—通信与信息系统]