Research On Radar Jamming Signal Generation Technology Based On UAV-borne

Exploring effective interference methods against modern radar systems has been an important research goal in the field of radar interference and countermeasures in many countries.Researchers engaged in radar interference technology research are also trying to improve the performance of radar jamming equipment,at the same time,the military combat applications of unmanned aerial vehicles(UAVs)are more and more extensive.The use of UAV platforms with highly efficient radar jamming equipment has become the mainstream of current radar electronic jamming,based on radar jamming signal generation technology.Compared with other jamming generating platforms,radar jamming signal based on UAV has the characteristics of fast response,large instantaneous bandwidth and autonomous generation of multiple jamming signals.It can penetrate into enemy defense area to approach jamming and avoid the risk of pilots' casualties.Therefore,as an important technical direction of radar electronic warfare in the complex electromagnetic environment of the new era,it is extremely significant in scientific research for the military application.This thesis studies an UAV based radar jamming signal generation system,which is used to interfere with various ground-based and ship-based radar systems,and can generate suppressed interference signals and deceptive interference signals.After referring to the basic principles of radar interference,radio frequency storage technology and radar echo simulation and other related literature,this thesis designs the implementation scheme of a set of radar interference signal generation system,in which the system includes reconnaissance receiving unit,interference generating unit,and integrated control unit.The main research work in this thesis focuses on the digital signal processing part of the interference generating unit,which will be carried out in the following aspects:1.The project background is introduced.The principle and key technologies of unmanned airborne radar jamming signal generation are studied and analyzed,including the basic radar jamming principles,RF storage technology,radar echo simulation principle and broadband signal parallel processing technology.2.Based on the theoretical research,the characteristics of the unmanned airborne radar jamming signals are analyzed in detail.Then,through the theoretical derivation and engineering practice,the mathematical models of various radar jamming signals are given,and then the mathematical model or hardware implementation structure of the radar jamming signal generation is verified by simulation.3.The hardware implementation and functional test of the unmanned airborne radar jamming signal generation system are introduced.The realization of the unmanned airborne radar jamming signal generation system researched and developed by this subject is introduced from several aspects such as hardware structure,signal processing scheme and control protocol.In this paper,a dense false target generation model based on DDR3 and a broadband multi-target delay line structure are proposed.Finally,test records and performance indicators are analyzed for various interference signals generated.The test results basically meet the system design indicators.