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GPU-based video SAR echo simulation parallel implementation method

An implementation method and echo technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problem of difficult to meet video SAR echo simulation requirements, long echo simulation calculation time, Low efficiency and other problems, to reduce the overhead of video memory space and computing resources, save the time for echo simulation generation, and overcome the effect of video memory overflow

Active Publication Date: 2017-10-03
XIDIAN UNIV +1
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Problems solved by technology

The disadvantage of this method is that the echo simulation calculation time is long and the efficiency is low, and it is difficult to meet the requirements of large-scale scene and high frame rate video SAR echo simulation

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  • GPU-based video SAR echo simulation parallel implementation method
  • GPU-based video SAR echo simulation parallel implementation method
  • GPU-based video SAR echo simulation parallel implementation method

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] The embodiment of the present invention provides a GPU-based parallel implementation method for video SAR echo simulation, which combines the improved concentric circle algorithm and GPU parallel technology to realize efficient video SAR echo simulation. A CUDA heterogeneous programming mode is adopted, and the CUDA heterogeneous programming includes a CPU module and a GPU module. Use the CPU for data initialization and logical transaction management, i...

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Abstract

The invention belongs to the field of radar signal processing and discloses a GPU-based video SAR echo simulation parallel implementation method. The method comprises the following steps: copying radar system parameter values from a memory of a CPU to a constant memory of a GPU; transmitting original scene image data in the memory of the CPU to a video memory of the GPU; setting a kernel function and parallelly calculating space coordinates and backscattering coefficients of each point target; setting a kernel function and parallelly calculating space coordinates of a radar platform and instantaneous squint angle between the radar platform and each point target in each azimuth sampling moment; setting a kernel function and carrying out segmentation on all point targets and obtaining echo signals of the point targets in all segmented data; setting a kernel function and obtaining an initial echo signal of the radar at all azimuth moments; and setting a kernel function and obtaining a final echo signal obtained after linear frequency modulation processing as a video SAR echo signal. The method has the advantages of high real-time performance and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and in particular relates to a GPU-based video SAR echo simulation parallel implementation method, which can be used for video synthetic aperture radar (Video Synthetic Aperture Radar, VideoSAR) imaging algorithm, verification of motion compensation algorithm and video imaging Evaluation of Radar System Performance. Background technique [0002] Synthetic aperture radar has the characteristics of all-day, all-weather, long-distance and high-resolution imaging. The video synthetic aperture radar can perform continuous multi-frame uninterrupted observation and imaging of distributed scene targets, and realize reliable speed-independent moving target detection, which belongs to the frontier technology of radar research. [0003] Before a new type of video SAR system is put into practice, accurate simulation of the echo signal is generally required in order to verify and evaluate the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/41
CPCG01S7/41G01S13/904G01S13/9004
Inventor 丁金闪陈文俊梁毅张玉洪
Owner XIDIAN UNIV
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