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Shift variant mode double-base synthetic aperture radar imaging method

A synthetic aperture radar and bistatic technology, applied in the field of radar, can solve the problem of lack of effective imaging methods for synthetic aperture radar

Active Publication Date: 2009-02-18
四川电子科技大学教育发展基金会
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Problems solved by technology

[0004] In order to overcome the problem of lack of effective imaging method for shift-variable bistatic synthetic aperture radar, the present invention provides a shift-variable mode bistatic synthetic aperture radar imaging method, which has the characteristics of realizing shift-variable mode bistatic synthetic aperture radar with a small amount of computation Aperture Radar Imaging

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  • Shift variant mode double-base synthetic aperture radar imaging method
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  • Shift variant mode double-base synthetic aperture radar imaging method

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Embodiment Construction

[0054] 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:

[0055] Step 1. Generate the simulation data of the bistatic SAR in the shift mode. The system parameters required for the simulation are shown in Figure 3:

[0056] Step 2. Define the SAR imaging space and initialize the imaging system parameters;

[0057] In this experiment, the unit vector parallel to the velocity direction of the launch platform and within the ground plane is selected as the first coordinate base ξ of the SAR imaging space 1 = [1, 0, 0]; In addition, select the second coordinate base ξ of the SAR imaging space 2 = [0, 1, 0].

[0058] The system parameters selected in this experiment for initializing the shift mode bistatic SAR imaging method are consistent with those provided in Table 1.

[0059] Step 2: Compress the raw data of the bistatic SAR in...

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Abstract

The invention provides an imaging method for a shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR) based on inverse variable metric Fourier transform, and the method aims at the characteristic that the resolution of the shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR) changes by time, and uses variable metric Fourier transform to eliminate the adverse effect brought to the imaging of the Bistatic Synthetic Aperture Radar (Bistatic SAR) by the resolution of the shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR) changing by time, so as to use less calculation to achieve the imaging of the shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR). The method solves the shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR) imaging problem, and is characterized in that the method uses less calculation to achieve the imaging of the shift-variant mode Bistatic Synthetic Aperture Radar (Bistatic SAR). The method can be applied to the fields of Synthetic Aperture Radar ( SAR) imaging, earth remote sensing and the like.

Description

Technical field: [0001] The invention belongs to the technical field of radar, and in particular relates to a shift-variable mode bistatic synthetic aperture radar imaging method based on variable-scale inverse Fourier transform in the synthetic aperture radar (SAR) imaging technology. Background technique: [0002] Bistatic Synthetic Aperture Radar (Bistatic SAR) is a new type of synthetic aperture radar system in which the receiver and transmitter are installed on different moving platforms. Bistatic SAR not only maintains the high-resolution characteristics of the SAR system, but also improves the flexibility, anti-jamming ability and survivability of the radar system. It has become a research hotspot in the field of SAR recently. According to my knowledge and published literature, for example: Brian D.Righling, Member, IEEE, Randolph L.Moses. "MotionMeasurement Errors and Autofocus in Bistatic SAR". IEEE Trans on Imageprocessing.Vol.15, No.4.Apr. 2006; Yates, B, Home, A...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/02
Inventor 张晓玲师君杨建宇王银波
Owner 四川电子科技大学教育发展基金会
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