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Motion platform scan radar super-resolution imaging method

A super-resolution imaging and scanning radar technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc., can solve the problems of limited resolution improvement, small calculation amount, and fast iteration convergence speed.

Inactive Publication Date: 2017-01-04
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

This method has a fast iterative convergence speed and a small amount of calculation, but the resolution improvement is limited

Method used

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  • Motion platform scan radar super-resolution imaging method
  • Motion platform scan radar super-resolution imaging method
  • Motion platform scan radar super-resolution imaging method

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Embodiment Construction

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

[0055] The implementation of the present invention will be further described below with reference to the accompanying drawings.

[0056] In order to facilitate the content of the present invention, the following terms are first explained.

[0057] Term 1: Radar angle super-resolution

[0058] Radar angular super-resolution refers to the method of radar through signal processing, breaking through the limit that the system itself can achieve, and achieving high resolution in azimuth.

[0059] Term 2: Bayes' Theorem

[0060] Bayes' theorem is a series of probability theory invented and created by British mathematician Thomas Bayes, and is widely used in mathematics, engineering and other theories. The specific formula is as follows:

[0061] ...

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Abstract

The invention discloses a motion platform scan radar super-resolution imaging method. Targeted at problems of low resolution of real wave beam radar azimuths in the prior art, the method provided by the invention regards maximum posterior probability density function values of target scattering coefficients as estimation for the target scattering coefficients; under different discrete parameters, different target statistical characteristics and noise statistical characteristics are constraint by generalized Gaussian distribution; further, a deconvolution problem of calculating the target scattering coefficients is converted into a regularization estimation problem with variable regularization items; and finally, solving of a regularization estimation problem is realized through utilization of a conjugate gradient algorithm; the solving method is converted into an iterative operation; subsequently, radar angle super-resolution imaging is realized; and problems of low resolution of the azimuths in a scan imaging mode are solved.

Description

technical field [0001] The invention belongs to the technical field of radar imaging, and is particularly suitable for a real beam scanning radar azimuth angle super-resolution imaging method. Background technique [0002] The research on forward-looking high-resolution imaging of airborne radar is of great significance to both military and civilian fields. Realize the high-resolution imaging of the airborne platform looking forward, which can solve the application requirements in the fields of search, tracking, identification, monitoring, positioning of enemy targets, as well as aircraft autonomous landing, autonomous navigation, ground detection, material airdrop, ocean search, etc. . [0003] Radar forward-looking high-resolution imaging requires high-resolution images in both range and azimuth directions. The range direction high resolution can be achieved by transmitting a chirp signal with a large time-width bandwidth product, and then performing pulse compression te...

Claims

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Application Information

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IPC IPC(8): G01S13/89G01S7/41
CPCG01S13/89G01S7/41
Inventor 张寅李昌林彭磊张兴明毛德庆吴阳张永超黄钰林杨建宇
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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