FPGA based radar imaging parallelizing method
A radar imaging and imaging technology, applied in the imaging field, can solve the problems of low data processing efficiency and the processing speed of a single processor cannot meet the requirements, so as to avoid the resource limitation of limited storage resources and improve the computing efficiency.
Inactive Publication Date: 2014-05-21
NANJING UNIV
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For occasions that require real-time imaging, the processing speed of a single processor is far below the requirements, and the data processing efficiency is low
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[0021] The solution of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0022] Such as figure 1 , the FPGA-based radar imaging parallelization method provided in this embodiment includes image parallelization processing, data parallelization processing, and pipeline parallelization processing. For mutually independent imaging points, through image-level parallel processing, the imaging tasks are evenly distributed to several chips for parallel execution. For the imaging task in a single chip, the back projection operation is performed on the image source data corresponding to each pixel point through pulse-level parallel processing, and the obtained back projection value is output. For the back-projection operation part of the BP algorithm, the pixels of the target image are divided into rows through pipeline-level parallel processing, so as to complete the back-projection operation of the pixels. The BP algorithm is a ...
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The invention relates to an FPGA (Field Programmable Gate Array) based radar imaging parallelizing method. The method comprises image parallelizing, data parallelizing and pipeline parallelizing, wherein for imaging points independent of each other, imaging tasks are averagely distributed to a plurality of chips and executed in parallel through image-level parallel treatment; for imaging tasks in an individual chip, back projection is performed on image source data corresponding to each pixel point through pulse-level parallel processing and the obtained back projection value is output; for a back projection operation part in a BP (Back Projection) algorithm, the pixel points of a target image are divided through pipeline-level parallel processing, and then back projection operation of pixel points can be completed. The FPGA based radar imaging parallelizing method has the beneficial effects that a hybrid parallelizing method is adopted in combination with hardware resource conditions, image domain parallelizing, pulse domain parallelizing and pipeline-level parallelizing are combined, and the advantage of high-speed operation of FPGA is utilized thoroughly and a pipeline parallelizing method is adopted inside an arithmetic unit, and as a result, the arithmetic unit is optimized more thoroughly.
Description
technical field [0001] The invention relates to an imaging method, in particular to an FPGA-based radar imaging parallelization method. Background technique [0002] Synthetic aperture radar (SAR) has the ability to image and identify regional targets and moving targets, and can provide two-dimensional or even three-dimensional images of the surface of the illuminated area, so it has been more and more widely used in military and civilian fields. The large amount of echo data and the high computational complexity of imaging algorithms in SAR impose strict requirements on the speed of the signal processor. For occasions that require real-time imaging, the processing speed of a single processor is far below the requirements, and the data processing efficiency is low. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art above, and provide a parallel method for radar imaging based on FPGA realized by combinin...
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IPC IPC(8): G01S13/90
CPCG01S7/41G01S13/90G01S13/9017
Inventor 潘红兵鲁亚楠李丽何书专鲁恒亚李伟沙金
Owner NANJING UNIV