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Onboard high-resolution strabismus bunching synthetic aperture radar (SAR) imaging method based on sliding receiving window

A high-resolution, imaging method technology applied in the field of signal processing to achieve precise focusing, precise focusing, and strong applicability

Active Publication Date: 2013-09-04
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sliding receiving window technology adjusts the start time of echo data acquisition, and the Doppler history of each target in the observation area also changes with the azimuth, making the traditional imaging method no longer applicable

Method used

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  • Onboard high-resolution strabismus bunching synthetic aperture radar (SAR) imaging method based on sliding receiving window
  • Onboard high-resolution strabismus bunching synthetic aperture radar (SAR) imaging method based on sliding receiving window
  • Onboard high-resolution strabismus bunching synthetic aperture radar (SAR) imaging method based on sliding receiving window

Examples

Experimental program
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Embodiment

[0117] This embodiment proposes an airborne high-resolution squint spotlight SAR imaging method based on a sliding receiving window. The simulation scene is a 3×3 dot matrix, and the interval between points is 100m. Finally, the upper left and middle of the simulation scene are respectively , and the three points on the lower right are evaluated. The specific simulation scenarios are as follows figure 2 The imaging parameters involved in the imaging process are shown in Table 1.

[0118] Table 1 embodiment parameters

[0119]

[0120] This embodiment specifically includes the following steps:

[0121] Step 1: Read in the two-dimensional original echo complex data S of the airborne high-resolution squint spotlight SAR based on the sliding receiving window start and the corresponding imaging parameters. Among them, S start is a two-dimensional complex array with a size of 65536×16384, and the specific imaging parameters are shown in Table 1;

[0122] Step 2: Convert the...

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Abstract

The invention discloses an onboard high-resolution strabismus bunching synthetic aperture radar (SAR) imaging method based on a sliding receiving window. The onboard high-resolution strabismus bunching SAR imaging method comprises the following steps of 1, reading original echo data and relevant imaging parameters; 2, performing azimuth linear frequency demodulation processing; 3, performing azimuth Fourier transformation processing; 4, performing azimuth linear frequency demodulation residual phase error compensation processing; 5, performing range Fourier transformation processing; 6, performing uniform compression processing; 7, performing stolt interpolation processing; 8, performing azimuth inverse Fourier transformation processing; 9, performing geometric correction processing; and 10, performing range Fourier transformation processing. The invention provides the onboard high-resolution strabismus bunching SAR imaging method based on the sliding receiving window in order to solve the problem that a method for imaging the onboard high-resolution strabismus bunching SAR original echo data based on a sliding receiving window technology does not exist at present.

Description

technical field [0001] The invention belongs to the field of signal processing, in particular to an airborne high-resolution squint spotlight synthetic aperture radar synthetic aperture radar (Synthetic Aperture Radar, SAR) imaging method based on a sliding receiving window. Background technique [0002] SAR is an active remote sensor that works in the microwave frequency band. It overcomes the limitations of optical imaging due to weather and light conditions. Camouflage, etc., greatly improved the information capture capability of the radar. Therefore, SAR has become a popular research field of radar technology, and more and more countries pay attention to it. Compared with the traditional side-looking SAR system, airborne squint SAR imaging has high flexibility and maneuverability in practical applications. By adjusting the antenna beam pointing, the SAR system can freely and flexibly select the observation area, and can quickly revisit Sensitive areas, greatly improvin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
Inventor 陈杰曾虹程杨威张豪杰王鹏波
Owner BEIHANG UNIV
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