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A Maximum Posteriori-Based Angle Super-resolution Imaging Method for Scanning Radar

A scanning radar and angular super-resolution technology, which is applied in the field of radar imaging technology and signal processing, and can solve problems such as false targets and noise sensitivity.

Active Publication Date: 2020-07-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Literature "Y.Zha, Y.Huang, J.Yang, J.Wu, Y.Zhang and H.Yang," An improved Richardson-Lucy algorithm for radar angular super-resolution," 2014IEEE Radar Conference, Cincinnati, OH, 2014 ,pp.0406-0410." Based on the traditional Richardson-Lucy (R-L) method, Laplace prior is added to improve the azimuth resolution, but it is sensitive to noise and prone to false targets

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  • A Maximum Posteriori-Based Angle Super-resolution Imaging Method for Scanning Radar

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[0054] In order to facilitate those skilled in the art to understand the technical content of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.

[0055] The present invention mainly uses simulation experiments to demonstrate the feasibility and effectiveness of the proposed radar angle super-resolution method. All steps and conclusions in the present invention are verified to be correct on the Matlab2015 simulation platform, and the present invention will be further elaborated below in conjunction with the accompanying drawings and specific implementation steps.

[0056] Such as figure 1 Shown is the solution flow chart of the present invention, the technical solution of the present invention is: a scanning radar angle super-resolution imaging method based on maximum a posteriori, comprising:

[0057] S1. The chirp signal is transmitted through the real beam scanning radar to obtain the two-dimensional ...

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Abstract

The invention discloses a scanning radar angle super-resolution imaging method based on maximum a posteriori, which is applied in the field of radar imaging technology and signal processing. The chirp signal is emitted by scanning the radar with a real beam, and the two-dimensional echo signal of the irradiated area is obtained. High resolution in the range direction is achieved through pulse compression technology and range walking correction technology; then, according to the azimuth echo model of the scanning radar, the azimuth echo of the scanning radar is modeled as a convolution form of the radar antenna pattern and the target scattering coefficient; On this basis, the radar angle super-resolution imaging is realized using the convolutional inversion method based on the maximum a posteriori probability (MAP).

Description

technical field [0001] The invention belongs to the field of radar imaging technology and signal processing, in particular to super-resolution imaging of real beam scanning radar azimuth angle. Background technique [0002] Radar imaging technology, as an active aviation and aerospace remote sensing method, has the characteristics of all-day and all-weather work, and has been widely used in military and civilian fields. The high-resolution imaging technology of radar has always been the key point and difficulty of technical research. For the high-resolution imaging of the radar platform's forward-looking area, it has shown great application value in sea detection and imaging, environmental monitoring, and disaster rescue. However, limited by its imaging mechanism, synthetic aperture radar and Doppler beam sharpening technology cannot achieve high-resolution imaging of the radar front-sight area. At present, real-beam radar imaging mostly uses airborne scanning radar, which...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/89G01S7/41
CPCG01S7/41G01S13/89
Inventor 张寅李昌林吴阳毛德庆徐帆云黄钰林杨建宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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