Research On The Wireless Positioning System Based On UWB

Ultra-wideband(UWB)wireless technology is proposed in recent years,indoor wireless location technology has high precision,high level of Dana seconds resolution,combined with distance measurement algorithm based on time of arrival,in theory,can achieve the cm-level positioning accuracy and can meet the demand of industrial application of positioning.This paper designed a UWB indoor positioning system,the content mainly includes the design of the hardware system,software system design and improvement based on TDOA algorithm.First of all,the thesis introduces the research and development status of UWB high precision positioning system,the basic principle of indoor positioning system technology,analyzed the characteristics of all kinds of indoor positioning system technology.Secondly,the basic component of UWB positioning system are analyzed,discussed the subtle differences in the label and micro base stations,power supply module,MCU module is given and enhancing the UWB module,RF signal module and storage module chip selection,basic circuit,and the PCB design to focus on RF circuit,the realization of RF signal enhancement circuit layout,completed the UWB positioning system label/hardware design of a micro base station;Then discussed the basic principles of UWB localization algorithm is proposed using the reference tag auxiliary information of arrival time(TDOA)to improve the algorithm,respectively gives the software design flow of labels and micro base stations,finally made a real and experimental verification,the results show that based on the RF signal enhancement technique and auxiliary reference tag UWB indoor positioning system has higher positioning accuracy,for UWB indoor positioning accuracy provides an effective technical path of ascension.