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Partitioning processing-based SAR real-time imaging method and system thereof

A real-time imaging and block processing technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problem of poor imaging quality, high memory requirements for high-resolution SAR imaging, and difficult real-time performance. Guarantee and other issues to achieve the effect of solving image quality deterioration and reducing system memory requirements

Active Publication Date: 2014-09-03
BEIJING INST OF RADIO MEASUREMENT
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a SAR real-time imaging method and system based on block processing to solve the problems of high-resolution SAR imaging requiring high system memory, poor imaging quality caused by distance and spatial variability, and difficulty in ensuring real-time performance

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  • Partitioning processing-based SAR real-time imaging method and system thereof
  • Partitioning processing-based SAR real-time imaging method and system thereof
  • Partitioning processing-based SAR real-time imaging method and system thereof

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[0085] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0086] Such as figure 1 As shown, a SAR real-time imaging system based on block processing, including range echo pulse pressure module 1, azimuth dimension block processing module 2, full aperture parameter estimation module 3, envelope compensation module 4 and range dimension block processing Module 5;

[0087] The range echo pulse pressure module 1 is used to perform pulse compression on each received range echo data;

[0088] The azimuth dimension block processing module 2 is used for range migration correction, Doppler parameter and motion parameter estimation to the azimuth sub-aperture data;

[0089] The full-aperture parameter estimation module 3 is used to jointly analyze and estimate the parameters of ea...

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Abstract

The invention relates to a partitioning processing-based SAR real-time imaging method and a system thereof. A distance echo pulse compression module is used for carrying out pulse compression on each received distance echo datum; an azimuth dimension partitioning processing module is used for carrying out range migration correction and Doppler parameter and kinematic parameter estimation on azimuth subaperture data; a full-aperture parameter estimation module is used for carrying out conjoint analysis and estimation on each azimuth subaperture parameter to obtain full-aperture Doppler parameters and kinematic errors; an envelope compensation module is used for carrying out envelop compensation on the azimuth subaperture data; and a distance dimension partitioning processing module is used for carrying out phase compensation, azimuth pulse compression, multi-look processing and quantization output on data which has undergone envelope compensation. Then, partitioning processing-based SAR real-time imaging processing is finished. The method has low requirements on system memory, can be adopted to effectively solve the problem that range variance leads to poor image quality, and is especially suitable for a SAR real-time imaging system which has high requirements on real-time performance.

Description

technical field [0001] The invention relates to the field of imaging radar, in particular to a block-based SAR real-time imaging method and system. Background technique [0002] Synthetic Aperture Radar (SAR) is a high-resolution imaging radar that uses pulse compression technology and synthetic aperture principle in the range and azimuth dimensions to obtain two-dimensional high-resolution images. SAR is widely used in aerial fine surveying and mapping, environmental monitoring, disaster assessment and other fields, and can obtain high-resolution image information of the target area in time. With the application of SAR more and more widely, the resolution and real-time performance of its imaging are also put forward high requirements. [0003] The general SAR real-time imaging method is based on full aperture processing. The specific process is as follows: first, pulse compression is performed on each received range-dimensional signal until the entire aperture data is rece...

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S7/352G01S13/90G01S13/9004
Inventor 刘忠伟刘京
Owner BEIJING INST OF RADIO MEASUREMENT
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