The Research Of Target Tracking Technology In Small Areas Based On UWB

Compared with the traditional target location technology,wireless sensor networks can achieve more accurate positioning of the target.Therefore,this paper is based on WSN for target location and tracking technology research in small region.The method most widely used in positioning is GPS,whether military or daily life.But the channel environment of the closed indoor environment like mine,small area channel hospital,the control room of the bottom of dam is complex,GPS positioning is no longer appropriate.So we need to study the new method for the same kind of target location and tracking technology.In order to achieve high-precision positioning in indoor track,the paper proposes a location algorithm using range and range rate,mainly to complete the following assignment:(1)Research and analyse the several common short-range wireless communication technology,and analyse of their respective advantages and disadvantages comparatively,finally this paper uses the UWB technology;Research and analyse of several common wireless location algorithms,and the paper adopts TOA location algorithm to achieve target location;Through the study of several commonly used data fusion technology,select KF/EKF method which is suitable for dynamic target tracking.(2)The definition of the LS model is discussed,and the performance of the algorithm is analyzed by Matlab simulation,and the sensitivity and location accuracy of the noise are studied by increasing the range noise.(3)For the UWB wireless location algorithm based on location,first of all,we study the design of the filter model,and then through the Matlab simulation,we analyze the performance of the algorithm.By increasing the range noise,the sensitivity to the noise and the location accuracy of the LS model and the position algorithm are analyzed comparatively.(4)In the study of UWB wireless location algorithm based on distance,firstly we design filter model,and it is indicated that the EKF equation in this paper;then we analyze the algorithm performance by Matlab simulation.The performance of the algorithm is started from the analysis of sensitivity of different range noise of LS model,location algorithm and distance algorithm,and according to the simulation data of three algorithms,we analyze the positioning accuracy and stability.(5)In this paper,we focus on the UWB wireless location algorithm based on range and range rate.Firstly,the definition of the model is explained;Secondly,the filter model of the algorithm is designed;Thirdly,by constructing the observability matrix of the model,the observability analysis is carried out;At last,the performance of the model is carried out by Matlab simulation.When the performance analysis is performed,the accuracy and stability of the above four models are analyzed by Matlab simulation data and simulation diagram,and it is concluded that the performance of UWB wireless location algorithm based on range and range rate is better than that of the traditional localization algorithms.