Millimeter wave fuse chaff interference identification method based on distance image feature extraction

Abstract

The invention discloses a millimeter wave fuse chaff interference identification method based on distance image feature extraction. The method is good in stability, high in accuracy, high in processing efficiency and good in classification effect. The method comprises the following steps: (10) target distance image alignment: processing a fuse target echo signal, and obtaining an aligned target distance image by utilizing global minimum entropy correction; (20) obtaining a chaff cloud distance image: processing the chaff interference signal based on a chaff cloud dynamic diffusion model to obtain a chaff cloud one-dimensional distance image; (30) feature calculation: analyzing and aligning the target distance image and the chaff cloud one-dimensional distance image by using an entropy algorithm to obtain a waveform entropy value of the target/chaff distance image, calculating distance image correlation and a scattering intensity ratio of the target distance image and the chaff cloud one-dimensional distance image, and taking the distance image correlation and the scattering intensity ratio as a feature parameter set; (40) feature extraction: performing clustering analysis on the feature parameter set by using an FCM algorithm to obtain clustering distribution of a target and interference; and (50) judgment and identification: setting a threshold value, and judging the type of the fuse echo signal.

Description

technical field [0001] The invention belongs to the technical field of electronic countermeasures and anti-jamming, in particular to a chaff jamming identification method of a millimeter-wave fuze based on feature extraction of range images. Background technique [0002] Chaff is the most commonly used passive jamming material because of its convenient use, good jamming effect, short development time, and low cost. It is widely used in the field of electronic countermeasures and plays a significant role in modern military warfare. According to the operational purpose of chaff jamming, it can be divided into two types: suppressive jamming and deceptive jamming. Due to the remarkable jamming performance of chaff, various countries and regions have also carried out research on chaff jamming technology and anti-jamming methods, among which the research on the imaging characteristics of chaff clouds is of great significance. [0003] The missile-borne weapon system has higher re...

AI Technical Summary

Problems solved by technology

This method has good performance, but the acquisition of polarization scattering parameters and the calculation of correlation matrix are relatively complicated, which reduces the hardware processing efficiency of the fuze and cannot meet the real-time requirements of the millimeter-wave fuze. At the same time, this method is only effective for diluted chaff interference. Effect, unable to resist other types of chaff interference, has certain limitations

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