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Synthetic aperture radar imaging method based on graphics processing unit

A technology of synthetic aperture radar and graphics processor, applied in the field of target detection, can solve the problems of large amount of calculation, slow reconstruction speed of SAR imaging sparseness, etc., achieve the effect of reducing sampling rate, realizing fast reconstruction and speeding up reconstruction speed

Inactive Publication Date: 2013-10-30
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: Aiming at the problem that the conventional CS reconstruction algorithm has a large amount of calculation and the sparse reconstruction speed of SAR imaging is slow by using CPU, a fast parallel compressed sensing SAR imaging method based on GPU is proposed

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  • Synthetic aperture radar imaging method based on graphics processing unit
  • Synthetic aperture radar imaging method based on graphics processing unit

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Embodiment Construction

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0029] In the present invention, compressive sensing theory is applied to SAR imaging, a sparse SAR imaging model based on compressive sensing (CS) theory is established, and the efficient parallel processing capability of graphics processing unit (GPU) is used to realize the SAR imaging based on compressive sensing theory. Quick rebuild.

[0030] figure 1 It is a flowchart of the GPU-based SAR imaging method of the present invention, as shown in the figure, the method of the present invention specifically includes the following 3 steps:

[0031] 1. Establish a sparse SAR imaging model and determine the reconstruction algorithm of the model.

[0032] According to a specific implementation manner of ...

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Abstract

The invention discloses a synthetic aperture radar (SAR) imaging method based on a graphics processing unit (GPU). Through the SAR imaging method, based on compressive sensing theory, SAR imaging of a sparse scene is realized. The method is characterized in that: the method comprises the following steps: establishing a sparse SAR imaging module and determining a reconstruction algorithm of the module; based on the size of the SAR imaging, determining sizes of grids and thread blocks required by parallel parts of the reconstruction algorithm and allocating storage space, which is used for storing data in the reconstruction algorithm, for the GPU; and reading the observation data from outside by the GPU, performing sparse reconstruction on the SAR imaging based on the reconstruction algorithm, and returning reconstruction results. The parallel performance of the GPU is utilized in the SAR imaging method, and thus rapid reconstruction of the SAR imaging which is based on the compressive sensing theory is realized.

Description

technical field [0001] The invention belongs to the technical field of target detection, and in particular relates to a synthetic aperture radar (Synthetic Aperture Radar, SAR) imaging method based on a graphics processing unit (GPU), in particular to a GPU-based fast parallel compressed sensing SAR imaging method. Background technique [0002] As the main remote sensing sensor, Synthetic Aperture Radar (SAR) can synthesize high-resolution images on moving platforms (such as aircraft and satellites). The SAR system can obtain a two-dimensional ground image by transmitting a series of spaced radio frequency pulse signals and sampling the reflected echoes of ground targets after processing. The imaging of the illuminated area by SAR has the working characteristics of all-day and all-weather (such as: fog, clouds, rain and snow, etc.). Modern airborne and spaceborne SAR systems can synthesize very high-resolution images and are therefore widely used in many civilian and milita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
Inventor 张冰尘田继华洪文孙进平
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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