Research On Key Technology Of UAV Navigation Spoofing System

With the development of the application of the satellite navigation in the filed of military UAV,the role of UAV in reconnaissance,oriented attack and other multipurpose combat has become prominent.Faced with the potential threat of UAV,it's of great significance and value to study the UAV navigation spoofing technology.Based on how to realize the UAV navigation spoofing,the research of this paper focuses on the construction of UAV navigation spoofing system,UAV spoofing control strategy and spoofing control algorithm,UAV spoofing positioning error and UAV navigation spoofing effectiveness evaluation.The main contents are as follows:(1)Based on the relevant theories of UAV navigation,the UAV navigation spoofing system is constructed according to the actual needs of UAV navigation spoofing,and its structure is analyzed.Aiming at the control units of UAV navigation spoofing system,the internal control flow is analyzed,which realized the visual display of the content and function of UAV navigation spoofing system.(2)Based on repeater deception jamming,the induced model of UAV spoofing is constructed,and a negative delay compensation method is proposed to solve the problem of negative delay which can not be realized in engineering.Aiming at the increase of clock error caused by compensation delay,the corresponding modification method of clock error is proposed to enhance the concealment of spoofing.(3)From the point of view of engineering application,a spoofing control algorithm for UAV is proposed,which detects UAV trajectory by radar system and calculates the time delay control volume of different satellites based on the trajectory of target UAV.The step-by-step spoofing of target UAV is achieved in order to get the UAV spoof to the specified point.(4)The UAV navigation spoofing positioning error is analyzed and processed.Based on the analysis of the sources of UAV navigation spoofing positioning error,the spoofing error model is constructed,the factors affecting the positioning of repeater spoofing jamming are analyzed,the Geometric Dilution Precision(GDOP)of positioning is calculated.The positioning precision of repeater deception jamming under the influence of various error sources is obtained by simulation,which provides a theoretical basis for the engineering implementation of repeater deception jamming.(5)An evaluation system of UAV navigation spoofing effectiveness is constructed.The evaluation index system of UAV navigation spoofing effectiveness is proposed from three aspects: system equipment,spoofing signal and spoofing ability.The evaluation model of UAV navigation spoofing effectiveness is constructed according to the evaluation criteria.Through simulation analysis of specific UAV navigation spoofing effectiveness evaluation case,the feasibility of evaluating the effectiveness of UAV navigation spoofing is verified.