Radar target attribute scattering center extraction method and device

Abstract

The invention relates to a radar target attribute scattering center extraction method and a device. The method comprises the following steps of: acquiring an SAR complex image; segmenting each scattering center of a target and carrying out inverse Fourier transform on the complex image to obtain radar echo data corresponding to each scattering center; performing complex decomposition on the radar echo data corresponding to each scattering center to obtain an echo module value correlation matrix and an echo argument correlation matrix; performing optimization solution on an optimization problem formed by the echo module value correlation matrix and the dimension reduction joint dictionary to obtain an estimation value of the echo module value correlation attribute parameter; performing optimization solution on an optimization problem formed by the echo argument correlation quantity matrix and the dimension reduction joint dictionary to obtain an estimated value of the echo argument correlation attribute parameter; and obtaining an attribute parameter set corresponding to all scattering centers. According to the method, multiple target attribute scattering centers can be rapidly extracted, and the radar target physical attribute feature extraction efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of radar target feature extraction and recognition, in particular to a radar target attribute scattering center extraction method and device, computer equipment, and a computer-readable storage medium. Background technique [0002] The target feature of SAR (Synthetic Aperture Radar) signal is the basis of target recognition. The target feature is the result of the interaction between the electromagnetic wave emitted by the radar and the target, and is contained in the target scattered echo signal. The target recognition technology based on SAR signal needs to extract the relevant features of the target from the signal, including target shape and size features, strong scattering point features, contour features, etc. In the attribute scattering center model, the scattering response of the scattering center under the excitation of electromagnetic waves is a function of the measurement frequency and the observ...

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Problems solved by technology

[0004] The purpose of the present invention is to address at least some of the above-mentioned deficiencies, and provide a rapid extraction technology of radar target attribute scattering centers based on complex number decomposition, so as to reduce the difficulty of calculation, and further solve the problem of large amount of computation caused by high dimensionality of target attribute parameters in practical applications. The problem of poor precision

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