Research On Indoor Positioning Technology Based On Ultra Wide Band

Indoor positioning has good prospects for development.Becauce of the characteristics of ultra wideband technology,the positioning system based on UWB has the potential of high precision positioning.At present,the ultra wideband positioning system can reach the centimeter level positioning accuracy in the range of visual range,but in the actual production or living environment,the non line of sight environment occupies a larger proportion than the horizon environment,In order to adapt to the high precision positioning in the non visibility environment,based on understanding the existing basic positioning technology,study on NLOS measurement channel identification,NLOS measurement data processing and adaptive localization algorithm in NLOS environment.In recent years,UWB wireless communication has become one of the most popular physical layer technology for short distance and high speed wireless networks.Based on the application background of indoor positioning,the main contents and innovations of this paper are as follows:1.Summarizes the main positioning algorithms based on UWB,and presents the advantages and disadvantages of various algorithms,and summarizes the main application scenarios and development trends of UWB positioning.2.Analysis of Classic NLOS channel environment identification method,the classical methods have high computational complexity.This problem,combined with the use of UWB devices,presents a size signal estimation method of NLOS environment identification value by measuring the signal strength and the first.3.The non line of sight environment is divided into two categories,and a pseudo range difference method is proposed to deal with the pseudo range.Based on the modern time series analysis,the 3 order MA model is used to model the measurement error,and the influence of the measurement error on the positioning accuracy is analyzed.4.In the case of only the use of ultra wideband equipment,based on the geometric relationship,a new location algorithm is proposed by using 3 base stations.Based on the error model and adaptive filtering algorithm,a node tracking algorithm is proposed.Based on the acceleration information and heading angle information of inertial navigation equipment and the pseudo range information of the ultra wide band equipment,a new algorithm is proposed.5.From the point of view of practical application,this paper designs and realizesthe positioning visualization system platform.By using this system,the location information can be directly visualized,which is convenient for the management of personnel and materials.6.Design and realize the positioning visualization software used in the auxiliary positioning system.