摘要
在室内定位领域,IEEE于2016年提出了802.11mc协议,实现了高精度的WiFi测距,并可以提供米级的定位精度。针对此测距方法精度受非视距(NLOS)影响严重,影响室内定位精度的问题,提出了一种基于视距(LOS)非视距识别的RTT定位方法,建立了一个视距非视距模型用于识别非视距测距结果,将非视距剔除后用最小二乘法进行单点定位。验证结果表明,该方法的识别模型查准率为83.01%,查全率为74.97%。与未剔除非视距的定位结果比,在定位精度与稳定性方面均有提升。
In the field of indoor positioning,IEEE proposed the 802.11mc protocol in 2016,which realizes high-precision WiFi ranging and can provide meter-level positioning accuracy.However,the accuracy of this ranging method is seriously affected by non-line-of-sight(NLOS),which affects the accuracy of indoor positioning.To decrease the effect of NLOS,an RTT positioning method based on LOS/NLOS identification is proposed.An identifying model is established to distinguish the NLOS ranging results,and the least squares are used to perform single-point positioning after the NLOS range results are eliminated.The experimental results show that the precision rate of the identifying model of this method is 83.01%,and the recall rate is 74.97%.And compared with the positioning results without excluding non-line-of-sight,the positioning accuracy and stability are improved.
作者
司明豪
汪云甲
徐生磊
刘辉
SI Minghao;WANG Yunjia;XU Shenglei;LIU Hui(School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China)
出处
《无线电工程》
北大核心
2021年第8期802-809,共8页
Radio Engineering
