SAR deception jamming target identification method and system based on differential feature enhancement

Abstract

The invention discloses a method and a system for identifying an SAR deception jamming target based on differential feature enhancement. The method comprises steps: blended data of real SAR scene echo and SAR deception jamming are acquired, a data matrix is generated after correction processing, and reference signals are generated; through different processing steps, a first-position one-dimensional image containing all information and a second-position one-dimensional image after jamming feature suppression are generated respectively from the data matrix, and after further processing, a differential feature image matrix is obtained; a rectangular window is adopted to process the differential feature image matrix, and gray histogram data and a reference gray histogram are generated; and when the matching distance between the gray histogram and the reference histogram is larger than a preset threshold, a deception jamming target is identified. Differential features of imaging radar original data in different imaging method are enhanced, the deception jamming target is identified in the SAR image, the ability of the imaging radar against deception jamming target is improved, and the cost is reduced.

Description

Technical field [0001] The present invention relates to the technical field of signal processing, in particular to a method and system for identifying an SAR deception jamming target based on enhanced differential characteristics. Background technique [0002] The SAR (Synthetic Aperture Radar) deception jammer delays and modulates the intercepted SAR signal according to a pre-designed false scene, which requires lower power than traditional interference suppression and is more harmful. The jammer generates realistic and false targets in the real scene, thereby disrupting the information acquisition and decision-making of SAR. Therefore, the research on SAR spoofing jamming has attracted widespread attention from scholars, and correspondingly, more significant results have been achieved, making SAR spoofing jammers more realistic and efficient to produce more falsehoods in a variety of complex working modes Target, thereby increasing the threat of deception interference. Theref...

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Problems solved by technology

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a SAR deceptive jamming target identification method and system based on differential feature enhancement, aiming at solving the problem of the decrease in the identification resolution of deceptive jamming targets in the prior art, and the high cost of the deception jamming target system Defects

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