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Quick imaging method of linear array three-dimensional imaging synthetic aperture radar (SAR) based on sub-aperture approximation

A technology of synthetic aperture radar and three-dimensional imaging, which is applied to the radio wave measurement system, radio wave reflection/re-radiation, and the use of re-radiation, etc., and can solve problems such as large amount of computation

Inactive Publication Date: 2010-02-17
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0004] In order to overcome the problem of large calculation amount of linear array three-dimensional imaging synthetic aperture radar imaging method, the present invention provides a linear array three-dimensional imaging synthetic aperture radar based on sub-aperture approximation The rapid imaging method is aimed at the characteristics of the actual linear array three-dimensional imaging synthetic aperture radar echo signal that only contains some specific sparse scattering points in the three-dimensional space. Sparse targets are imaged, which solves the problem of large computational complexity in 3D imaging synthetic aperture radar imaging methods

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  • Quick imaging method of linear array three-dimensional imaging synthetic aperture radar (SAR) based on sub-aperture approximation
  • Quick imaging method of linear array three-dimensional imaging synthetic aperture radar (SAR) based on sub-aperture approximation
  • Quick imaging method of linear array three-dimensional imaging synthetic aperture radar (SAR) based on sub-aperture approximation

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Embodiment Construction

[0059] The present invention mainly adopts the method of simulation experiment to verify, and all steps and conclusions are verified correctly on VC++ and MATLAB7.0. The specific implementation steps are as follows:

[0060] Step 1. Initialize the parameters of the linear array 3D imaging synthetic aperture radar imaging system:

[0061] The system parameters adopted in this specific implementation mode are detailed in Figure 4 .

[0062] Step 2. Perform distance compression on the raw data of linear array 3D imaging synthetic aperture radar:

[0063] Using the standard range compression method of synthetic aperture radar to process the range echo data D of synthetic aperture radar 1 Perform compression to obtain the linear array three-dimensional imaging synthetic aperture radar data after distance compression, denoted as E 1 .

[0064] Step 3, intercepting the sub-aperture of the first linear array three-dimensional imaging synthetic aperture radar:

[0065]In the cen...

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Abstract

The invention provides a quick imaging method of a linear array three-dimensional imaging synthetic aperture radar (SAR) based on sub-aperture approximation. Aiming at the characteristic that an actual linear array three-dimensional imaging SAR echo only comprises echo signals of sparse scattering points in a three-dimensional space, the method adopts an aperture approximation technology to carryout imaging treatment on sparse targets in the three-dimensional space so as to better solve the problem of heavy computation of an imaging method of the three-dimensional imaging SAR. The invention has the advantage of realizing the linear array three-dimensional imaging SAR by utilizing smaller computation, and can be applied to the fields of SAR imaging, earth remote-sensing, and the like.

Description

technical field [0001] The technical invention belongs to the technical field of radar, and in particular relates 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 my knowledge and published literature, for example: M.Weiβ, J.H.G.Ender "A 3D imaging radar for smallunmanned airplanes-ARTINO" Radar Conference, 2005.EURAD 2005.BASSEMR.MAHAFZA and MITCH SAJJADI "Three-dimensional SAR imagi...

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Application Information

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IPC IPC(8): G01S13/90
Inventor 张晓玲廖可非曾涛师君张东浩杨悦
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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