A Radar Forward-Look Imaging Method Realizing Target Outline Reconstruction

Abstract

The invention provides a radar forward-looking imaging method for realizing target outline reconstruction, which belongs to the field of radar forward-looking imaging. Aiming at the problem that the target contour edge is not clear in the radar forward-looking imaging process, the method proposed by the present invention uses the total variogram in the radar forward-looking imaging, retains the target edge information, and realizes forward-looking while improving the target azimuth resolution. Clear reconstruction of object contours in regions. Based on the convolution model, the problem of improving the azimuth resolution is transformed into a convolution inversion problem; in the convolution inversion process, the total variation function is applied to the regularization method, and an objective function based on gradient constraints is established to increase the edge The weight of information in convolution inversion avoids the loss of target edge information in the convolution inversion process. The present invention uses the total variation operator as a regular item to construct the objective function, improves the ability of the regularization method when dealing with abrupt edges, and avoids splitting of the target edge into multiple strong single-point targets and loss of target contour information.

Description

technical field [0001] The invention belongs to the field of radar forward-looking imaging, in particular to a radar forward-looking imaging method for realizing target contour reconstruction. Background technique [0002] The high-resolution imaging of the radar platform’s forward-looking area is widely used in many fields such as fighter planes’ ground attack, aircraft blind landing navigation, missile precision guidance, sea detection and imaging, target tracking and identification, and battlefield search. The imaging results with a clear outline can provide more useful information about the target, which is more conducive to target recognition and detection. [0003] Due to the limitations of the imaging mechanism, the traditional synthetic aperture technology and Doppler beam sharpening technology cannot achieve high-resolution imaging in the forward-looking area; while the real beam scanning radar, due to the limitation of the real aperture size, the azimuth resolution...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the edge of the target contour is not clear during the radar forward-looking imaging process, the present invention proposes a radar forward-looking imaging method to realize the reconstruction of the target contour. In the convolution inversion process, the total variogram is used to add gradient constraints to Preserve the target edge information and improve the ability of the convolution inversion method to deal with abrupt boundaries, so as to obtain clear target contour reconstruction results

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