Research On Multivariate Vector Synthesis Jamming Technology

Monopulse radar has excellent anti-jamming capability and accurate angle measurement technology,so it is widely used in a variety of guided weapons in modern warfare.Cross-eye jamming,as the main jamming way to deal with monopulse radar,has always been a research hotspot in the field of electronic warfare.Based on the cross-eye jamming model and from the point of view of improving the degree of freedom of the jammer,this thesis makes a detailed study on the Multivariate vector synthesis jamming model.Through simulation experiments,this thesis deeply studies and analyzes the jammer parameters,parameter tolerance and jammerto-signal requirements of the multivariate vector synthesis jamming model,and provides reasonable suggestions for the application of multivariate vector synthesis jamming.It provides a theoretical basis for the development of coherent multi-Source source jamming.First,the traditional two-point source cross-eye jamming mathematical model and the cross-eye jamming mathematical model considering the platform echo are derived,and their limitations are analyzed in detail in this thesis,leading to the multivariate vector synthesis jamming technology.The jamming principle and the distribution of scattering points of the multivariate vector synthesis jamming technology in the form of three-radiating-unit array layout are analyzed,and its advantages over the traditional two-point source cross-eye jamming are pointed out in this thesis.The platform application of multivariate vector synthesis jamming and the jamming strategy are analyzed.Then,the mathematical model of multivariate vector synthetic jamming in the form of three-radiating-unit array layout in the scene of jamming phase monopulse radar is derived,and the mathematical expressions of single pulse ratio,monopulse indication angle and threeradiating-unit array jamming gain are obtained.The effects of the parameters of the jammer,the layout of the jamming antenna and the rotation angle of the jamming platform on the jamming performance of the jammer are analyzed,and the parameter tolerance of the threeradiating-unit array jammer system is analyzed.Simulation experiments have proved that due to the improvement of the degree of freedom of the system,the three-radiating-unit array vector synthesis jamming has a looser parameter tolerance range and stronger practicability than the cross-eye jamming.Finally,the JSR ratio requirement of multivariate vector synthesis jamming in the form of three-radiating-unit array layout is analyzed.In the case of considering the platform echo,the three-radiating-unit array vector synthetic jamming is modeled.By deducing the sum and difference channel echoes of monopulse radar,the mathematical expressions of monopulse ratio,monopulse indication angle and three-radiating-unit array jamming gain are obtained.Because of the uncertainty of the echo phase of the platform,the cumulative distribution function and limit expression of the three-radiating-unit array jamming gain are derived.At the same time,JSR is defined,and the influence of JSR change on three-radiating-unit array jamming effect is analyzed.Simulation experiments have proved that the three-radiating-unit array vector synthesis jamming has lower JSR requirements than cross-eye jamming.