Super-resolution processing method for augmented Lagrangian real-beam radar angle

Abstract

The invention discloses a super-resolution processing method for an augmented Lagrangian real-beam radar angle. Firstly a linear FM signal is transmitted in real-beam scanning, thereby obtaining a two-dimensional echo signal in a radar irradiation area. Then distance-direction high resolution is realized through distance-direction matched filtering. Then a signal model of an azimuth echo is constructed according to a scanning imaging process of a radar antenna. Then according to a principle of minimizing noise power influence, a deconvolution problem is converted to a constraint optimization problem. Furthermore solving of an objective function is realized by means of an augmented Lagrangian method, and an objective scattering coefficient is obtained through iterative inversion, thereby realizing super-resolution for the azimuth of a scanning radar. The super-resolution processing method settles a problem of low azimuth resolution in a real-beam scanning radar imaging mode.

Description

technical field [0001] The invention belongs to the field of radar detection, and in particular relates to a real-beam scanning radar angle super-resolution technology. Background technique [0002] As an imaging system that can work all day and all day, radar has played an important role in military and civilian fields such as marine and hydrological observation, environmental and disaster monitoring, and land / sea tracking and rescue because it is not affected by factors such as weather and environment. indispensable role. [0003] The real-beam scanning radar is a commonly used radar working mode. The imaging area is irradiated successively through the mechanical scanning of the real-aperture antenna to obtain the target scattering coefficient information. Therefore, high angular resolution of real-beam radar is beneficial to target reconnaissance, surveillance, positioning and identification in the scanning radar detection area, and is of great significance to applicatio...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above-mentioned technical problems, the present invention proposes an augmented Lagrangian real-beam radar angle super-resolution processing method. According to the radar antenna scanning imaging process, the signal model of the azimuth echo is constructed, and then according to the minimum noise power influence criterion, Transform the deconvolution problem into a constrained optimization problem, and use the augmented Lagrangian method to solve the objective function, and iteratively invert the target scattering coefficient to achieve the purpose of super-resolution of the azimuth angle of the scanning radar

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