Research On Visualization Of Border Radio Monitoring Coverage?Direction Finding And Positioning Of TDOA

Border security is the basis of national security.China has a vast territory with a total length of over 40,000 kilometers of land boundary and continental coastline.It is of vital importance to ensure the security of border radio.On the other hand,with the arrival of 5G era of "wireless Interconnection of everything" and the establishment of China(Yunnan)Pilot Free Trade Zone,base stations and mobile terminals in border areas will show explosive growth with the investment of 5G communication technology and the increase of border trade,and the electromagnetic environment will also be unprecedented complex.Based on the needs of national security and rapid technological development,radio monitoring must keep pace with the changing times.Based on PyCharm integrated development environment,this paper developed a visual system for radio monitoring coverage,direction finding and location,and deployed the system on the container cloud platform.In the back-end of Web application,the TDOA direction finding and positioning algorithm was prepared,Carry out map display design at the front-end,and through the front and back end interaction to achieve the radio monitoring coverage rendering on Baidu and ArcGIS online map,TDOA direction detection and positioning dynamic display.The specific research contents are as follows:I.Border radio surveillance coverage prediction.This chapter analyzes the distribution and topographical features of China's border ports.Take Yunnan border port as an example,according to the terrain and geomorphologic characteristics of border ports,a suitable radio wave propagation model is selected to calculate the radio monitoring coverage.And displays the radio monitoring coverage rendering with the system developed in this paper.II.Overview the theoretical knowledge of TDOA direction finding and location,and summarizes several mathematical models of direction finding and location.Aiming at different mathematical models,the algorithm program of applying the theory of direction finding and location to web page system is written by using grid point-by-point search solution method.It provides the algorithm theory and technical support for the development of the system.III.Data Visualization research.Based on the appellate algorithm,the system is developed to realize the dynamic display of radio monitoring coverage data rendering,direction finding and positioning on the online map.While realizing the basic functions of TDOA direction finding and positioning,Baidu Map and ArcGIS data visualization system focus on different and complement each other.Among them,Baidu map visualization system can carry out intelligent calculation of TDOA direction finding and positioning.Through intelligent calculation,measurement errors corresponding to node distribution of different monitoring stations are simulated,system parameters are optimized,and the optimal number of monitoring station nodes and formation distribution are selected.ArcGIS data visualization system focuses on the combination of radio monitoring and geomorphic features.The 3D satellite view is closer to the actual radio monitoring coverage rendering,TDOA direction finding and positioning.In the degree of visualization,there is a greater advantage.Some of the results of this paper have been applied in the radio integration platform project of Yunnan province.The project has been deployed and piloted in the headquarters of Yunnan university,Mengzi city of Hong he prefecture and Hekou County.