Research On Sidelobe Cancellation Performance In Broadband Dechrip System

With the increasing complexity of the modern battlefield environment and the continuous development of electronic jamming technology,the operation of the radar and,the effect of task completion are restricted by more and more factors.The antijamming performance has become an important evaluation criterion for the vitality of the radar.This article mainly discusses and studies the performance factors of the adaptive sidelobe cancellation technology in radar under the skew processing system from multiple perspectives.The main research contents are as follows:This paper studies the principles of radar adaptive beamforming technology and adaptive sidelobe cancellation,as well as the calculation and formula derivation of the optimal weight matrix,and simulates the radar's adaptive beamforming,the auxiliary antenna and the main antenna related channels,adding The effect of suppressing the jammed radar signal.A wideband signal model is established and compared with the narrowband signal model.Two classical broadband beamforming structures and principles are introduced,and sidelobe cancellation techniques under broadband signal conditions are studied based on this.By simulating the influence of signal bandwidth on the sidelobe cancellation effect,the difference between wideband signal and narrowband signal model is verified.The basic principles and steps of dechrip pulse pressure is introduced.And this paper deduces the signal formula obtained after low-pass filtering and discrete Fourier transform,studies the influencing factors of the dechrip pulse pressure performance,and simulates multiple scattering points The implementation process of dechrip processing.Through simulation and analysis,the influencing factors of sidelobe cancellation technology under wideband dechrip system are studied.Finally,through the study of the sidelobe cancellation performance from the above multiple angles,this paper proposes some improvement measures for the sidelobe anti-jamming performance,which has guiding significance for the establishment of the theoretical basis and model of broadband anti-jamming in engineering applications.