Research On Methods Against Radar Range Deception Jamming

Modern radar systems are confronting increasingly complex electromagneticcircumstance in which various passive and active jamming have brought rigorouschallenges to them. Compared with passive jamming, active jamming is more targetedand flexible to the victim radar systems, and it has been one of the primary instrumentsthreatening modern radar systems. Because new types of active jamming are constantlycoming forth, researching on methods of radar anti-active jamming has been theprincipal mission in radar field.Based on an in-depth analysis of the resent research advances in this field, thisdissertation introduces the current situation and developing trend of anti-jamming,analyzes and simulates the deception jamming and active false target based on DRFM.An algorithm called pulse diversity is researched, which consists of complex waveformmodulation and the waveform diversity. For the complex waveform modulation, animproved algorithm is proposed, analyzed and compared with the previous method.Simulation indicates that this algorithm has better effect. According to the generalconfiguration of a modern deceptive jammer with DRFM, the signal model and thefrequency spectrum of the RGPO jamming signal are analyzed. The frequency spectrumof the jamming signal is analyzed after phase quantization and time delay quantization.Quantitative analysis on the spectrum of the jamming has put emphasis on theparameter of the spurious spectrum. These features provide effective measurements forfurther research on anti-jamming.