An Augmented Lagrangian Real Beam Radar Angle Super Resolution Processing Method

Abstract

The invention discloses an augmented Lagrangian real-beam radar angle super-resolution processing method. Firstly, a linear frequency modulation signal is transmitted while the real beam is scanning to obtain a two-dimensional echo signal of the radar irradiation area, and then the range-direction matching filter is used. Realize high resolution in the range direction, then construct the signal model of the azimuth echo according to the process of radar antenna scanning and imaging, and then convert the deconvolution problem into a constrained optimization problem according to the minimum noise power influence criterion, and use the augmented Lagrangian The method realizes the solution of the objective function, and iteratively inverts the scattering coefficient of the target to achieve the purpose of azimuth super-resolution of the scanning radar. The invention preferably solves the problem of low azimuth angle resolution in the 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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