Research Of The Key Technology In Locating Interference Source On UAV Platform

With rapid development of the satellite telecommunication,satellite interfering circumstances,which caused the communication interrupt and even satellite communication network paralysis and other serious problem,emerge in endlessly.In order to guarantee the quality of the satellite communication,it is necessary to realize the interference source location,which can solve the interference problem in satellite communications.It is difficult to get the accurate position of interference sources with directional antenna or monitoring vehicle.Instead of helicopter,this paper takes unmanned aerial vehicle(UAV),which has the advantages of the superior performance and the low cost in shape,as the platform to locate the position of interference source.In this paper,the main purpose is to research the key technology in locating the targets on the groud,the main work and achievements of this paper are as follows:Firstly,with the situation of locating,this paper sets up a target localization model based on the time difference measurement technology.With hyperbola's asymptote,instead of hyperboloid using circular conical surface to locate the interference source.Instead of system of three-variable nonlinear equations with higher degree,solving a system of two-variable nonlinear equations with higher degree make the target location performance has been improved.Secondly,aiming at the direction finding algorithms,the d irection finding principle are analyzed.The factors that influence the accuracy of the direction finding are: the length of baseline,SNR,effective bandwidth,the sample size of linear fitting,the design of sampling filter.Then the simulation model of communication direction finding is constructed,and the simulation results show that: the accuracy of the direction finding will be influenced,when there is aliasing with low sampling frequency.In addition improve of stopband attenuation can get high accuracy of the direction finding.Thirdly,in view of positioning model,with the direction of interference sources the target location algorithm has been studied,which includes analysis of theoretical shape,parametric modeling and transformation in goordinates.And with the target location algorithm,a software which can locate interference source and paint the location of target.The research results above not only enrich the localization technology of interference source on UAV platform,but also provides the theoretical and methodological support,the key technology has been engineering verification,which can use in spaceflight,aerospace,sailing and electronic warfare.The research provides both a theoretical study and algorithm verification.