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Moving target SAR sparse imaging method and device, electronic equipment and storage medium

A moving target and sparse imaging technology, which is applied in the field of SAR sparse imaging of moving targets, can solve the problems of complex imaging of SAR moving targets, and achieve the effect of large response dynamic range and good focusing performance

Pending Publication Date: 2022-01-04
SOUTHEAST UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

SAR moving target imaging is more complex under sparse aperture

Method used

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  • Moving target SAR sparse imaging method and device, electronic equipment and storage medium
  • Moving target SAR sparse imaging method and device, electronic equipment and storage medium
  • Moving target SAR sparse imaging method and device, electronic equipment and storage medium

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Embodiment Construction

[0029] Next, the technical solutions in the embodiments of the present invention will be described in the following examples of the embodiments of the present invention. Based on the embodiments of the present invention, those skilled in the art do not have all other embodiments obtained by creative labor, all of which are protected by the present invention.

[0030] The specification and claims of the invention and the terms "first", "second", "second", and the like in the above drawings are used to distinguish similar objects without having to describe a particular order or award order. It is to be understood that the data used in this case can be interchanged in appropriate, so that the embodiments described herein can be implemented in order other than the content illustrated or described herein.

[0031] In view of the present invention, the SAR spars-imaging method provided by the present invention is generally divided into two steps in the distance: first in the distance: f...

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Abstract

The embodiment of the invention discloses a moving target SAR sparse imaging method and device, electronic equipment and a storage medium, and the method comprises the steps: carrying out the clutter suppression of an echo signal of a collected moving target linear frequency modulation signal, performing motion compensation on a radar and a moving target by using a spectral analysis method and based on the echo signal subjected to clutter suppression to obtain an echo signal subjected to motion compensation; then constructing a parameterized representation dictionary based on the echo signal subjected to motion compensation, representing the echo signal subjected to motion compensation according to the parameterized representation dictionary, constructing a target function of sparse aperture imaging and parameter estimation by taking the echo signal subjected to motion compensation as a constraint condition, and finally solving the target function by adopting an orthogonal matching pursuit method; and carrying out Doppler fuzzy number estimation and phase error correction on the moving target, so that an SAR image of the moving target, which is large in response dynamic range and good in focusing performance, is obtained.

Description

Technical field [0001] Embodiments of the present invention relate to Synthetic Aperture Radar, SAR, SAR, and more particularly to a SAR sparse imaging method of a moving target. Background technique [0002] Synthetic Aperture Radar, SAR) As a modern active remote sensor, it is possible to provide high-resolution observation scenario images. In recent years, it can be seen from the compressed sensible (CS) theory, and the sparse optimization technology signal can be utilized. Accurate reconstruction from the descending data, thereby breaking through the limitations of Nyquist sampling. Correspondingly, compression sensing is widely referenced in SAR imaging, and an important application there is to reduce sampling data, such as sparse aperture imaging. For SAR Ground Movement Target Imaging (SAR-GMTIM), motion compensation is an important issue for determining moving target imaging performance. In addition to the movement of the radar platform, there is also an additional moveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/41
CPCG01S13/9019G01S7/415
Inventor 徐刚陈宇智张慧洪伟郭坤鹏
Owner SOUTHEAST UNIV