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Image method of inverse synthetic aperture radar

An inverse synthetic aperture and imaging method technology, applied in the imaging field of inverse synthetic aperture radar, can solve the problems of reduced imaging azimuth resolution, imaging defocus of moving targets, etc., and achieve the effect of improving resolution and good engineering application prospects

Inactive Publication Date: 2019-02-26
BEIJING INST OF RADIO MEASUREMENT
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Problems solved by technology

[0003] However, when the inverse synthetic aperture radar is located on the moving platform and moves with the moving platform, when imaging the moving target, since the moving platform usually moves non-ideally, the imaging of the moving target will be defocused, resulting in azimuth resolution of the imaging. rate reduction

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Embodiment Construction

[0018] The principles and features of the present invention will be described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0019] Inverse Synthetic Aperture Radar (ISAR) forms a synthetic aperture by capturing the relative motion of a moving target relative to the radar, thereby performing high-resolution imaging. Usually, your synthetic aperture radar is fixed on the base and has no relative movement relative to the ground, and it is used to detect aircraft targets. When the inverse synthetic aperture radar is located on an aircraft such as a UAV and flies with the UAV, it can detect ground targets or When detecting ships on the sea surface, due to the non-ideal movement of UAVs, the imaging of targets such as ships will be defocused, resulting in a decrease in the azimuth resolution of the imaging.

[0020] Therefore, it is an urg...

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Abstract

The invention discloses an imaging method of an inverse synthetic aperture radar, wherein the method relates to the field of the inverse synthetic aperture radar. The method comprises the steps of acquiring an echo signal, performing distance-direction pulse compression on the echo signal; acquiring inertial navigation information, calculating a distance walking correction factor and a phase errorcompensation factor of a moving platform in non-ideal movement according to the inertial navigation information; correcting the echo signal after pulse compression according to the distance walking correction factor and the phase error compensator factor; and performing azimuth-direction Fourier analysis on the corrected echo signal, and obtaining an imaging result. The imaging method according to the invention can realize clear target imaging of the inverse synthetic aperture radar on the condition of the non-ideal movement of the moving platform, thereby improving resolution of the image. Furthermore, the imaging method does not require hardware improvement to existing radar equipment in realization and has high engineering application prospect.

Description

technical field [0001] The invention relates to the field of inverse synthetic aperture radar, in particular to an imaging method of inverse synthetic aperture radar. Background technique [0002] Inverse Synthetic Aperture Radar (Inverse Synthetic Aperture Radar, ISAR) forms a synthetic aperture through the relative motion of the moving target relative to the radar, so as to perform high-resolution imaging. [0003] However, when the inverse synthetic aperture radar is located on the moving platform and moves with the moving platform, when imaging the moving target, since the moving platform usually moves non-ideally, the imaging of the moving target will be defocused, resulting in azimuth resolution of the imaging. rate decreased. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide an imaging method of inverse synthetic aperture radar and a storage medium for the deficiencies of the prior art. [0005] The techni...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/90G01S13/9064
Inventor 陈洪猛鲁耀兵刘京林家豪易晓丽穆贺强
Owner BEIJING INST OF RADIO MEASUREMENT
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