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Distributed array SAR sparse representation three-dimensional imaging algorithm considering scene amplitude real value constraints

A sparse representation and 3D imaging technology, applied in the direction of radio wave reflection/re-radiation, using re-radiation, measurement devices, etc., can solve the problem of ignoring the sparsity of scene amplitude and achieve strong robustness, high-resolution 3D imaging , the effect of measuring the reasonableness of the model

Active Publication Date: 2020-08-21
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

However, the traditional sparse representation method takes the real part and the imaginary part of the complex scene and processes them separately, ignoring the constraints of the scene’s magnitude sparsity and the magnitude being a real number

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  • Distributed array SAR sparse representation three-dimensional imaging algorithm considering scene amplitude real value constraints
  • Distributed array SAR sparse representation three-dimensional imaging algorithm considering scene amplitude real value constraints
  • Distributed array SAR sparse representation three-dimensional imaging algorithm considering scene amplitude real value constraints

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[0051] In order to make the technical problems, technical solutions and beneficial effects solved by the application clearer, the application will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, not to limit the application.

[0052]Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terminology used herein in the description of the present invention is for the purpose of describing specific embodiments only, and is not intended to limit the present invention. As used herein, the indefinite article "a" or "an" does not exclude a plurality and the term "and / or" may include any and all combinations of one or more of the associated listed items.

[0053] Such as figure ...

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Abstract

The invention provides a distributed array SAR sparse representation three-dimensional imaging algorithm considering scene amplitude real value constraints. According to the algorithm, a sparse representation theory is adopted, a complex scene is represented as a combination of amplitude and phase, a scene amplitude real value constraint term is added into a regularized reconstruction model by using two pieces of priori information that the three-dimensional scene sparsity and the scene amplitude as real numbers, and the scene amplitude and phase are respectively estimated by using a quasi-Newton algorithm, thereby completing three-dimensional reconstruction more conforming to the actual situation. According to the method, amplitude real value constraints are added to the regularized reconstruction model, so that the measurement model is more reasonable, the actual situation is met, and high-resolution three-dimensional imaging with higher super-resolution capability and higher robustness can be realized.

Description

technical field [0001] The invention relates to a distributed array SAR sparse representation three-dimensional imaging algorithm in consideration of scene amplitude real-value constraints, and belongs to the field of application based on three-dimensional imaging design. Background technique [0002] The array SAR technology sparsely arranges the array antennas that transmit and receive separately in the cross-course, adopts the nadir observation method, and realizes the azimuth direction and elevation direction of the observed object through the synthetic aperture, pulse compression and beamforming technologies (equivalent to the distance of the traditional SAR system). The three-dimensional resolution of direction) and cross-course greatly improves the radar's regional information perception. This technology can realize the three-dimensional reconstruction of the observation area through a single straight-line flight downward-looking imaging method, which effectively solv...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/41
CPCG01S7/41
Inventor 刘辉李葛爽张刚强孟庆华申红旗吴飞飞李伟亭
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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