Method and device for eliminating interference signals in SAR image

A technology in interference signals and images, applied in the field of synthetic aperture radar signal processing, can solve the problems of high computational complexity, achieve the effects of eliminating interference signals, facilitating elimination processing, and ensuring signal fidelity

Pending Publication Date: 2021-02-05
HENAN UNIVERSITY
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Problems solved by technology

However, the solution of optimization problems is often accompanied by iterations, which makes this type of suppression method more computationally complex than other methods

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  • Method and device for eliminating interference signals in SAR image
  • Method and device for eliminating interference signals in SAR image
  • Method and device for eliminating interference signals in SAR image

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and examples. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, those skilled in the art will recognize that modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Therefore...

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Abstract

The invention provides a method and a device for eliminating an interference signal in an SAR image. The method comprises the following steps: converting an SAR complex data image into a distance frequency domain image; performing interference detection on the distance frequency domain image, and dividing the distance frequency domain image according to an interference detection result to obtain afirst sub-image containing interference information and a second sub-image not containing interference information; performing difference operation on the first sub-image and the second sub-image toobtain a third image only containing interference information; carrying out change detection processing on the first sub-image and the second sub-image to obtain an interference change image, carryingout denoising processing to obtain a fourth image of an interference position binary image, and carrying out matching processing on the third image and the fourth image to obtain a fifth image only containing interference information and positions; and obtaining an SAR image after interference removal based on the SAR complex data image and the fifth image. Through the method for eliminating theinterference signal, a high-precision SAR image with high process signal fidelity for eliminating the interference signal can be obtained.

Description

technical field [0001] The invention belongs to the technical field of synthetic aperture radar signal processing, and in particular relates to a method and a device for eliminating interference signals in SAR images. Background technique [0002] Based on Synthetic Aperture Radar (SAR for short) has the advantages of being all-weather, all-weather, and penetrating clouds, rain, and fog, countries all over the world are scrambling to develop their own synthetic aperture radar equipment and systems. Radar satellites have been launched one after another, and the electromagnetic spectrum resources have become crowded. Coupled with the increasingly complex electromagnetic environment and other factors, this makes the synthetic aperture radar receive radio frequency interference signals from other equipment during its mission. The existence of these interference signals makes the final SAR image show bright periodic stripes and bright spots, which makes the image blurred and dis...

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Application Information

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IPC IPC(8): G01S7/36G01S13/90
CPCG01S7/36G01S13/9021
Inventor 李宁吕宗森郭拯危毋琳
Owner HENAN UNIVERSITY
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