摘要
面对生活中对高精度室内定位需求,采用DecaWave公司的DWM1000芯片,设计一种基于UWB的测距与定位系统。该软件系统利用双边测距(TWR)机制避免了基站之间的时钟同步,精确计算出标签和基站间的距离,同时根据飞行时间(TOF)定位算法解超限定方程组求得标签的坐标位置。实测结果表明,利用该系统静止标签的测距误差不超过15cm,移动标签测距误差不超过30cm,同时在信号非视距传播情况下的表现也较稳定,能够满足大部分场景下的室内定位需求。
This paper adopts DWM1000 chip of DecaWave company to design a UWB-based ranging and positioning system for high-precision indoor positioning in daily life.In this system,the clock synchronization between the base stations is effectively avoided by using the bilateral ranging(TWR)mechanism,and the distance between the tag and the base station is accurately calculated.Meanwhile,the coordinate position of the tag is obtained by solving the over-limit equations according to the time of flight(TOF)positioning algorithm.Through the field measurement,it can be found that the ranging error of the static tag of the system does not exceed 15cm,and the ranging error of the mobile tag does not exceed 30cm.At the same time,the performance of the signal in the case of non-line-of-sight propagation is also relatively stable,which can meet the requirements of most scenes for indoor positioning system.
作者
顾慧东
焦良葆
周健
GU Hui-dong;JIAO Liang-bao;ZHOU Jian(College of Telecommunication Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;College of Telecommunication Engineering,Nanjing Institute of Technology,Nanjing 211100,China)
出处
《软件导刊》
2020年第4期159-163,共5页
Software Guide
关键词
室内定位
超宽带
双边测距
实时定位系统
indoor positioning
ultra-wideband
TWR
real-time positioning system
