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GPU (graphic processing unit) implementing method based on backward projection InSAR (interfering synthetic aperture radar) imaging registration

A realization method and back-projection technology, which can be applied in the directions of radio wave reflection/re-radiation, utilization of re-radiation, measuring devices, etc., can solve problems such as large amount of computation

Inactive Publication Date: 2012-11-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, compared with the existing frequency-domain imaging methods, the BP algorithm has a very large amount of computation. Currently, it is mainly used in SAR high-precision two-dimensional imaging. In InSAR data imaging, there have been no reports of using BP algorithm for imaging.

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  • GPU (graphic processing unit) implementing method based on backward projection InSAR (interfering synthetic aperture radar) imaging registration
  • GPU (graphic processing unit) implementing method based on backward projection InSAR (interfering synthetic aperture radar) imaging registration
  • GPU (graphic processing unit) implementing method based on backward projection InSAR (interfering synthetic aperture radar) imaging registration

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Embodiment Construction

[0110] The present invention mainly adopts the method of simulation experiment to verify, and all steps and conclusions are verified correctly on VC++, MATLAB7.0, CUDA4.0 and GeForce GTX 560Ti graphics card. The specific implementation steps are as follows:

[0111] Step 1: Initialize InSAR imaging system parameters

[0112] Select the unit vector parallel to the velocity direction of the radar platform and within the ground plane as the first coordinate base of the InSAR imaging space The direction of the coordinate base is the azimuth direction; select the second coordinate base of the InSAR imaging space The coordinate base direction is the distance direction.

[0113] Initialize InSAR imaging system parameters include: radar system working signal wavelength λ=0.03m, radar platform main antenna transmission signal bandwidth B=150MHz, radar platform main antenna transmission pulse duration T r =1μs, radar platform receiving system sampling frequency F s =300MHz, the pu...

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Abstract

The invention discloses a GPU (graphic processing unit) implementing method based on backward projection InSAR (interfering synthetic aperture radar) imaging registration. The GPU implementing method based on the backward projection InSAR imaging registration comprises the following steps: projecting measured data of different antennae into the same imaging space for imaging by a backward projection algorithm; in the imaging process, performing high-phase-retention imaging and image registration on the different InSAR antennae and realizing integration of InSAR imaging and registration; and in combination of a GPU parallelizing technology, implementing fast processing of the backward projection algorithm. Compared with the conventional InSAR interference phase generation, the GPU implementing method based on the backward projection InSAR imaging registration has the advantages of good phase retention, integration of imaging and registration, improvement on algorithm efficiency through parallelization, and the like; by the GPU implementing method based on the backward projection InSAR imaging registration, quick generation of a high-precision InSAR interference phase is realized; and the GPU implementing method based on the backward projection InSAR imaging registration is applicable to the fields of synthetic aperture radar imaging, geochemical remote sensing and the like.

Description

technical field [0001] The technical invention belongs to the field of radar technology, and in particular relates to the field of synthetic aperture radar (SAR) imaging technology. Background technique [0002] Synthetic Aperture Radar (SAR) is a high-resolution microwave imaging system. Synthetic aperture radar relies on the relative motion between the radar and the target to synthesize a virtual array to obtain high resolution in the azimuth direction, and uses a large bandwidth signal to achieve high resolution in the range direction, and can perform two-dimensional imaging of the illuminated scene. Synthetic Aperture Radar Interferometry (InSAR) is an extension and expansion of general SAR functions. Two or more antennas with different positions are used to observe the same target scene, and the interferometric phase of the measurement data is obtained according to the slant distance difference between the target and different antennas, and then The technology of inver...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
Inventor 张晓玲韦顺军付涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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