Angle inversion based on anti-jamming against deceptive multiple false targets

Abstract

Based on digital radio frequency memory technology, jammers can copy the radar signal multiple times by different time delay and frequency shift to form deceptive multiple false targets. For non-self-defensive-type main lobe jamming, the jamming signal and the real signal from different angles into the radar receiver, when the false target generated by the jammer was in the same range cell as the real target, the angle measurement result was with high probability in the energy centre between the target and jamming. Thus, the angle tracking performance of the monopulse radar was retrograded. In this study, an anti-jamming method called angle inversion based on power synthesis is proposed to effectively estimate the real perspective of the target from deceptive multiple false targets, and the anti-jamming performance is revealed under the condition of a different jammer-to-signal ratio.

Keywords

• probability
• radar signal processing
• digital radio
• radar receivers
• angular measurement
• jamming
• different jammer-to-signal ratio
• anti-jamming performance
• anti-jamming method called angle inversion
• angle tracking performance
• angle measurement result
• false target
• jamming signal
• nonself-defensive-type main lobe jamming
• frequency shift
• different time delay
• radar signal multiple times
• digital radio frequency memory technology
• deceptive multiple false targets