Research On Jamming Method Of ELINT Acquisition System

The ELINT acquisition system is often used to detect the electromagnetic pulse information in space.By intercepting the electromagnetic pulse signal in a specific space,the intra/interpulse parameters of the pulse signal are estimated to identify the radar,obtain the radar system,judge the threat level of the radar,and guide other military equipment to take action.With the development of ELINT acquisition system,the survival problem of radar is becoming more and more serious,and the research on jamming method of ELINT acquisition system is imminent.Combined with the processing architecture of conventional ELINT acquisition system,this thesis studies the jamming methods of ELINT acquisition system.The main work of this thesis is as follows:1.The jamming method of rf receiving front end of ELINT acquisition system is studied.Firstly,two common receiver structures and weak links of ELINT acquisition system are studied.Aiming at the cross channel problem,transient effect problem and wide open receiving structure of analog-digital hybrid channelized receiver,comb spectrum jamming method based on radar signal modulation is studied.Aiming at the problem of frequency guide module and signal processing capability of sweep receiver,the dense pulse jamming method based on radar signal modulation is studied,and the effectiveness of the method is verified by simulation.2.The jamming method of signal processing layer in ELINT acquisition system is studied.Firstly,the measurement process and weak links in spatial,time domain,frequency domain and modulation domain are studied.Aiming at the weak ability of linear interferometer direction finding system to process simultaneous arrival signal,the jamming method of jamming pulse coordinated with radar pulse is studied,and the effectiveness of jamming method is verified by simulation.Aiming at the parameters in time domain,the jamming method of pulse splicing in time domain is studied to make the radar pulse envelope distorted.According to the characteristics of frequency domain and modulation domain,the jamming method based on radar signal modulation is studied.The jamming pulse has more characteristics of frequency domain and modulation domain than radar pulse.The ELINT acquisition system is guided to analyze the jamming pulse,and the effectiveness of jamming is verified by simulation.3.The jamming method of data processing layer in ELINT acquisition system is studied.Firstly,the conventional methods and weak links of radar signal sorting and radar recognition are studied.Aiming at the pre-sorting,the jamming method of anticlustering pre-sorting is studied.Aiming at the main separation,the jamming method based on radar frequency-modulation jamming is studied,which causes the missing batch.The effectiveness of jamming is verified by simulation.Aiming at radar recognition,the joint jamming method of multiple jammers is studied,and the jamming efficiency is verified by simulation.