Adversarial method based on chaff interference measured data

Abstract

The invention discloses an adversarial method based on chaff interference measured data. The adversarial method comprises the following steps: acquiring an echo signal of a radar; processing the echo signal to obtain a distance-Doppler two-dimensional image; performing two-dimensional constant false alarm rate detection on the distance-Doppler two-dimensional image to obtain a point set exceeding a detection threshold; clustering and grouping the point set passing through the detection threshold to obtain a plurality of groups of data with separated target signals and chaff signals; acquiring a plurality of pieces of feature information of each group of data from the distance-Doppler two-dimensional image; and classifying the plurality of groups of data by using the classifier and the feature information to obtain identification results of the target signal and the chaff signal. According to the adversarial method based on chaff interference measured data provided by the invention, the adopted feature information shows relatively high distinction degree with a target in each stage of chaff diffusion, so that the method has an effective confrontation effect and extremely high universality in the whole chaff cloud diffusion process.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a countermeasure method based on chaff interference measured data. Background technique [0002] Radar is a core component of precision-guided weapons in modern warfare, and radar jamming has become a routine means of the modern battlefield. Radar jamming is a general term for all tactical and technical measures that destroy and disrupt local radar detection of our target information. Among them, chaff jamming, as a common radar passive jamming method, was put into use for the first time in 1973 in a naval battle. It has been widely used in electronic countermeasures due to its advantages of significant jamming effect, convenient jamming implementation, and low jamming cost. After the chaff projectile is fired, it spreads in the air and forms a cloud-like interference object with a certain length, width and thickness, which is called the chaff corridor. The chaff itse...

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Problems solved by technology

[0004] However, although the first idea can achieve very high recognition accuracy, due to the inconsistent process indicators such as the chaff metal's own size, coating, and polarization scattering characteristics, the anti-interference party cannot obtain such key information, which leads to This kind of method is not very practical; the second idea can effectively counteract the chaff interference in a stable state, but because the echo characteristics of the whole process from never diffusing to fully diffusing are not stable, this kind of method cannot be stable and effective The third idea can only accurately distinguish the target and the chaff in the fully diffused state, and the judgment threshold needs to be adjusted according to the diffusion process, and the false target in the non-diffused state cannot be distinguished.

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