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Correlation method of ps point in bistatic/multistatic radar image based on sliding scattering center

A sliding scattering center, radar image technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve the problem of serious decorrelation between radar images and so on

Active Publication Date: 2017-06-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0012] The present invention proposes a bistatic / multistatic radar image PS point correlation method based on the sliding scattering center, which is used to solve the problem of multiple radars observing the same scene from different viewing angles with large differences due to the violent fluctuation of the target scattering characteristics. Serious problem of decorrelation between radar images, complete coherent registration processing between multi-angle radar images

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  • Correlation method of ps point in bistatic/multistatic radar image based on sliding scattering center
  • Correlation method of ps point in bistatic/multistatic radar image based on sliding scattering center
  • Correlation method of ps point in bistatic/multistatic radar image based on sliding scattering center

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[0049] The present invention provides a PS point correlation method of bistatic / multistatic radar image based on sliding scattering center. The present invention will be described in detail below with reference to the accompanying drawings.

[0050] Such as figure 1 with figure 2 As shown, for the PS point target we need to analyze under different viewing angles, the sliding scattering center is not at the same position, and the space spectrum occupied by the two-dimensional wavenumber domain is also different.

[0051] Such as image 3 As shown, for the PS point target, record the RCS value of each equivalent sliding scattering point on the target contour line as σ 0 (x, y), record the bistatic measurement between radar 1, 2 and 1, 2. 1.2 Observe the sliding scattering center position on the same segment of target contour as S 1 ,S 2 ,S, monostatic radar image 1, 2 and S 1 ,S 2 The corresponding point is the point with the same name that needs to be detected.

[0052] Step 1: Perfor...

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Abstract

The invention discloses a bistatic / multistatic radar image PS (permanent scatterer) point associating method based on a sliding scattering center, which accurately registers multiple SAR images viewed from different angles, and belongs to the field of bistatic / multistatic synthetic aperture radars. The method comprises: obtaining an approximate target outline scattering function by performing parabolic fitting on a PS point target outline function in a bistatic image; obtaining a homonymy point in a monostatic radar image by performing moving window search on the monostatic radar image; and finally, registering the monostatic radar image according to the homonymy point obtained through the search. The method fully utilizes the characteristics of the sliding scattering PS point target, solves a puzzle that a conventional PS point registering method is just capable of accurately registering images observed from a single angle, and has significant meaning to multi-angle radar image fusion and interference processing.

Description

Technical field [0001] The invention relates to a PS point correlation method of a bistatic / multistatic radar image based on a sliding scattering center, which belongs to the technical field of bistatic / multistatic radar. Background technique [0002] Synthetic Aperture Radar (SAR) is an all-weather, all-weather high-resolution microwave remote sensing imaging radar, which can be installed on aircraft, satellites, missiles and other flight platforms. Since its invention in the 1950s, it has been widely used in many fields, such as disaster control, vegetation analysis, and microwave remote sensing. [0003] Bistatic / Multistatic SAR (Bistatic / Multistatic SAR) is a newly emerging radar system. Its characteristic is that the launching platform and the receiving platform are separated in space. This radar system has unique advantages in many aspects: some radars are used as transmitters, and the rest are used as receivers to form a radar network that can obtain target scattering infor...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
CPCG01S13/90G01S13/9023G01S13/9058
Inventor 曾涛胡程王晶阳向寅龙腾毛二可
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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