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

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...

AI Technical Summary

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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