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Accurate SAR moving target parameter estimation method

A technology of parameter estimation and moving target, applied in the field of radar, it can solve the problems of large amount of calculation, insufficient accuracy, and the algorithm can only estimate some parameters, so as to achieve the effect of accurate parameters.

Active Publication Date: 2018-09-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] In order to solve the shortcomings of the existing algorithm that can only estimate some parameters, large amount of calculation, and insufficient accuracy, the present invention proposes an accurate SAR moving target parameter estimation method, which uses Radon transform and LVD to estimate moving target parameters, and is affected by clutter, etc. The influence of interference is small, and the information of various parameters of the dispatched target can be estimated

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Embodiment Construction

[0030] 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 in conjunction with the accompanying drawings.

[0031] In order to describe content of the present invention conveniently, at first do following term definition:

[0032] Definition 1. Synthetic Aperture Radar (SAR)

[0033] Synthetic aperture radar is a kind of fixed radar on the moving platform, combined with the movement of the moving platform to synthesize a linear array to realize the scene imaging in the range direction, and then use the echo delay in the range direction to complete the scene imaging in the range direction, so as to realize the scene Or a radar detection technique for two-dimensional imaging of targets. For details, see the literature "Digital processing of synthetic aperture radar data." Cumming, Ian G., and Frank H. Wong. Artech house 1.2 (2005): 3.

[0034] Definiti...

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Abstract

The invention discloses an accurate SAR moving target parameter estimation method. Aiming at the defects that existing algorithm cannot estimate partial parameters, operation amount is great and precision is not enough, Radon and LVD are adopted for performing moving target parameter estimation, and therefore, influence from interference such as clutter is small, and each parameter information ofthe moving target can be estimated; and parameters are refined by using an iterative shrinkage-threshold algorithm based on learning, so as to obtain an accurate parameter estimation value.

Description

technical field [0001] The invention belongs to the field of radar technology, in particular to a synthetic aperture radar (SAR) moving target estimation technology. Background technique [0002] SAR (Synthetic Aperture Radar) is an all-weather and all-weather radar system, which has the advantages of large imaging scene and high resolution, and has been widely used in military and civilian fields. Compared with the single-channel SAR system, the multi-channel SAR system obtains more data due to the increase of receiving channels, and can obtain more target information. SARGMTI (Ground Moving Target Estimation) has always been an important subject of SAR. There are many estimation methods, but there are conflicts between the time complexity of these methods and the estimation accuracy of moving targets. We hope to minimize the The complexity of the algorithm. Moreover, the existing SAR GMTI method is usually mainly aimed at slow-moving targets that do not generate Doppler ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 刘喆赵伟宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA