Research On Deceptive Jamming Strategy Of Satellite Navigation Receiver And Its Performance Evaluation

With the widespread application of satellite navigation systems around the world,electronic warfare has further developed,and research on deceptive jamming techniques for satellite navigation receivers has also achieved preliminary results.The deception jamming process is not just a stack of deception algorithms,but a process of interacting with the receiver.It pays attention to the strategy of deception jamming.Based on the research of satellite navigation system and its jamming technology,this article mainly studies the following:1)The development status of jamming technology of satellite navigation receiver at home and abroad is fully understood.Mastered the composition and inversion method of satellite navigation signals.The principle of acquisition,tracking,synchronization and positioning of satellite navigation receivers is studied.The main methods of satellite navigation jamming technology are discussed.2)In this paper,based on the basic principle of navigation receiver and spoofing technology,an intrusion strategy and synchronization strategy for deception jamming are proposed.In the intrusion strategy,the method of using power to invade the receiver is introduced.Transmission loss,noise base and elevation factor are considered.In the synchronization strategy,the delay algorithm is introduced.The methods of phase compensation,doppler frequency calculation and navigation message prediction are deeply studied.Thereby generating a pseudo-satellite signal.3)In order to make the receiver carrier deviate reasonably,the extension and tangent line algorithms are introduced to plan the carrier's deceptive trajectory.And the inertial navigation is used to constrain it.The flight control principle is introduced to assist the deception trajectory to adjust and form a closed loop system.By combining the delay algorithm in the jamming technique with the decoy algorithm,a deceptive jamming signal with deflection effect is generated.4)For the deception jamming strategy,the matlab simulation system is completed at the information layer,and the user interface with GUI is designed.The principle block diagram,simulation flow chart and simulation results of the whole and each part are introduced.On the basis of multiple references and researches,this paper also puts forward the evaluation criteria and evaluation indicators for the performance of deception jamming strategies.Finally,the simulation system is tested and counted,and a good result is obtained.