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Entropy-based single-channel synthetic aperture radar moving target detection method

A technology for synthetic aperture radar and moving target detection, applied in the fields of radar target detection and signal processing, can solve the problems of inter-channel error, high quality, high cost, etc., achieve good compatibility, reduce system costs, and avoid system performance degradation. Effect

Active Publication Date: 2020-03-06
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

However, the multi-channel method mainly has problems such as inter-channel error, huge cost, and high quality. In some special applications such as spaceborne SAR, it is still necessary to use a low-weight, low-cost single-channel to achieve SAR moving target detection.

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  • Entropy-based single-channel synthetic aperture radar moving target detection method
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  • Entropy-based single-channel synthetic aperture radar moving target detection method

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Embodiment Construction

[0031] The application will be further described in 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 related inventions, rather than to limit the invention. In addition, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0032] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The application will be described in detail below with reference to the accompanying drawings and embodiments.

[0033] figure 1A flow chart 100 of an embodiment of the entropy-based single-channel synthetic aperture radar moving target detection method of the present application is shown. The entropy-based single-channel synthetic aperture radar moving target detection method comprises th...

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Abstract

The present application discloses an entropy-based single-channel synthetic aperture radar moving target detection method. A specific implementation of the method includes: setting a size of a local window and a sliding step size of the local window for a pixel matrix z(MI, NI) of a single-channel synthetic aperture radar SAR image. Pixel matrix expansion sizes Mp and Np are calculated according to a size of the pixel matrix of the SAR image, the size of the local window, and the sliding step size of the local window. Zero-value expansion is performed on the pixel matrix z(MI, NI) of the SAR image, and an entropy matrix E (I, J) and a normalized entropy matrix of the expanded pixel matrix are calculated. The normalized entropy matrix is compared with a preset moving target detection threshold H, and the area in which the entropy matrix is below the threshold is the moving target. Single-channel synthetic aperture radar data is used in this embodiment to implement detection of the moving target, so that problems of high system cost and channel errors existing in a detection process of the moving target in a traditional along track Interfermetry ATI method are aovided. Performance ofdetection better than performance of slow moving target detection of the traditional along track interfermetry ATI method can be implemented in this embodiment.

Description

technical field [0001] This application relates to the field of signal processing technology, specifically to the field of radar target detection, and in particular to an entropy-based single-channel synthetic aperture radar moving target detection method, which can be used for single-channel synthetic aperture radar moving target detection and the like. Background technique [0002] The existing Synthetic Aperture Radar (SAR, Synthetic Aperture Radar) moving target detection methods can be divided into single-channel methods and multi-channel methods. The single-channel method is mainly based on the difference in Doppler parameters between the moving target and the static scene (clutter), and the moving target detection can be realized through the Doppler filter bank. The multi-channel method is mainly based on the difference between the channels of the moving target and the static scene (clutter), the interference phase, and the space-time two-dimensional response. (ATI, ...

Claims

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/9029
Inventor 张学攀王成林晴晴
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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