Research On Multi-target Jamming Waveform Synthesis Technology Based On DJS

Being a component of national defense science and technology,Electronic warfare technology plays an increasingly important role in modern warfare.While as the Radar jamming which can prevent the enemy's radar and its weapon system from their e ffective use,gets a significant development with the progress of radar anti-jamming technology.In this paper,we focus on the multi-target digital jamming synthesis method in complex electromagnetic environment.Firstly,this paper introduces the basic principles of DJS interference synthesis and the main performance indicators,including two key technologies: direct digital frequency synthesis technology(DDS)and digital radio frequency memory technology(DRFM).Secondly,related issues of multi-target digital jamming synthesis technology is discussed from the perspectives of suppressing jamming and deception jamming.The suppressing jamming is introduced from interference principle,classification and the measurement of interference effect,and selects the RF noise jamming as the optimal interference pattern,and quickly generates different parameters of the RF noise jamming by changing the clock frequency and address increment.Deception jamming is also introduced from the aspects of interfe rence principle,classification and the measurement of interference effect,and selects frequency-shifting jamming waveform as the optimal interference pattern.This paper finished the theoretical analysis and the simulation of baseband signal and DJS interference synthesis.Thirdly,interference effect is simulated of the single-target interference waveform and the multi-target synthesized interference waveform after matching the filter on the basis of the linear frequency modulation signal as the threat radar signal,the feasibility of multi-target DJS and the superior to the traditional interference are verified by comparision.Finally,several key issues of multi-target DJS are analyzed theoretically-the choice of the best baseband interference pattern corresponding to different systems and different working modes radar;necessity of reducing the peak-to-average ratio of the synthesized interference signal,and the establishment of the power distribution model.