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Method for merging resolutions of linear array three-dimensional imaging synthetic aperture radars

A synthetic aperture radar, three-dimensional imaging technology, applied in radio wave measurement system, radio wave reflection/re-radiation, using re-radiation, etc.

Active Publication Date: 2009-12-30
四川电子科技大学教育发展基金会
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Problems solved by technology

[0003] In order to overcome the problem that the tangent track resolution of the image obtained by the existing linear array 3D imaging synthetic aperture radar is generally smaller than the resolution along the track direction, the present invention provides a linear array 3D imaging synthetic aperture radar resolution fusion method. Invented method enables high-resolution line-array 3D imaging of synthetic aperture radar images

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Embodiment Construction

[0044] The present invention mainly adopts the method of simulation experiment to verify, and all steps and conclusions are verified correctly on MATLAB7.0. The specific implementation steps are as follows:

[0045] Step 1. Construct scale matrix H:

[0046] use the formula H = sin c ( p / N ) sin c ( p / N - 1 ) · · · ...

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Abstract

The invention provides a method for merging resolutions of linear array three-dimensional imaging synthetic aperture radars. The method adopts two linear array three-dimensional imaging synthetic aperture radars of which the motion trails are orthogonal to image the same region and then adopts an orthogonal spatial projection matrix technology to merge two obtained images, thereby generating a high-resolution linear array three-dimensional imaging synthetic aperture radar image. The method solves the problem that the cross track resolution of the linear array three-dimensional imaging synthetic aperture radar image is lower than the long track resolution of the linear array three-dimensional imaging synthetic aperture radar image. The method has the advantages of realizing the linear array three-dimensional imaging synthetic aperture radar high-resolution imaging by using a short array antenna and can be used in the fields of synthetic aperture radar imaging, earth remote sensing and the like.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to the technical field of synthetic aperture radar (SAR) imaging. Background technique [0002] Linear array three-dimensional imaging synthetic aperture radar (LASAR) is a new type of synthetic aperture radar system that fixes the linear array antenna on a moving platform to synthesize a two-dimensional planar array and perform three-dimensional imaging. Linear array three-dimensional imaging synthetic aperture radar can realize the ability of imaging three-dimensional ground which cannot be realized by single-antenna synthetic aperture radar at present, and has become a research hotspot in the field of synthetic aperture radar. According to the inventor's understanding and published literature, for example: J.Klare, A.Brenner, J.Ender, "A New Airborne Radar for 3D Imaging-Image Formation using the ARTINO Principle-", EUSAR, Dresden, Germany, 2006. BAS SEM R. MAHAFZA, MITCH SAJJADI ...

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Application Information

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IPC IPC(8): G01S7/02G01S13/90
Inventor 张晓玲师君杨建宇齐文元
Owner 四川电子科技大学教育发展基金会
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