TOA-Based NLOS Error Mitigation Algorithm for 3D Indoor Localization  

作　　者：Weigang Wang Yunwei Zhang Longbin Tian 

机构地区：[1]College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications

出　　处：《China Communications》2020年第1期63-72,共10页中国通信（英文版）

基　　金：supported in part by the foundation of Nanjing University of Posts and Telecommunications (No. NY215164);by the National Experimental Teaching Demonstration Centre Reform Project: Virtual 201106;supported by the Key University Science Research Project of Jiangsu Province under Grant (No. 14KJA510003);supported by the Postgraduate Research & Practice Innovation Program of Jiangsu Province under Grant No. SJCX19_0275;supported by the National Natural Science Foundation under grant No. 61771257, No. 61605085 and No.61571233, No.61871232

摘　　要：In the process of indoor localization,the existence of the non-line of sight(NLOS)error will greatly reduce the localization accuracy.To reduce the impact of this error,a 3 dimensional(3D)indoor localization algorithm named LMR(LLS-Minimum-Residual)is proposed in this paper.We first estimate the NLOS error and use it to correct the measurement distances,and then calculate the target location with linear least squares(LLS)solution.The final nodes location can be obtained accurately by NLOS error mitigation.Our algorithm can work efficiently in both indoor 2D and 3D environments.The simulation results show that the proposed algorithm has better performance than traditional algorithms and it can significantly improve the localization accuracy.In the process of indoor localization, the existence of the non-line of sight(NLOS) error will greatly reduce the localization accuracy. To reduce the impact of this error, a 3 dimensional(3D) indoor localization algorithm named LMR(LLS-Minimum-Residual) is proposed in this paper. We first estimate the NLOS error and use it to correct the measurement distances, and then calculate the target location with linear least squares(LLS) solution. The final nodes location can be obtained accurately by NLOS error mitigation. Our algorithm can work efficiently in both indoor 2D and 3D environments. The simulation results show that the proposed algorithm has better performance than traditional algorithms and it can significantly improve the localization accuracy.

关 键 词：indoor localization NLOS LLS 2D 3D 

分 类 号：TN92[电子电信—通信与信息系统]