An Entropy-Based Single-Channel Synthetic Aperture Radar Moving Target Detection Method
A technology of synthetic aperture radar and moving target detection, which is applied in the field of radar target detection and signal processing, which can solve the problems of high quality, high cost, and channel-to-channel error, and achieve system cost reduction, good compatibility, and avoid system performance degradation Effect
Active Publication Date: 2021-10-22
CHINA ACADEMY OF SPACE TECHNOLOGY
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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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[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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The application discloses an entropy-based single-channel synthetic aperture radar moving target detection method. The specific implementation of described method comprises: to the pixel matrix z(M of single-channel synthetic aperture radar SAR image I ,N I ), set the size of the local window and the sliding step of the local window. Calculate the pixel matrix expansion size M according to the size of the SAR image pixel matrix, the size of the local window and the sliding step of the local window p and N p ; For SAR image pixel matrix z(M I ,N I ) to perform zero-value expansion, and calculate the entropy matrix E(I, J) and its normalized entropy matrix of the expanded pixel matrix; compare the normalized entropy matrix with the preset moving target detection threshold H, and the The area is the moving target. This implementation method uses single-channel synthetic aperture radar data to realize moving target detection, avoiding the problems of high system cost and channel error that the traditional along-track interferometric ATI method faces in the process of moving target detection. Slow-moving target detection performance of along-track interferometric ATI method.
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, ...
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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