Compressed sensing vortex imaging method based on modal selection, storage medium and application

Abstract

The invention belongs to the technical field of radar imaging, and discloses a compressed sensing vortex imaging method based on modal selection, a storage medium and application, wherein the method comprises the steps: adjusting a phase excitation mode of a uniform circular ring array to enable vortex waves of different modals to have the same beam direction, so that a target can be irradiated by all vortex beams; then performing correlation operation based on a two-dimensional imaging result obtained by Fourier transform and a two-dimensional imaging result (randomly selecting a modal sequence) obtained by a compressed sensing algorithm, and optimizing the modal sequence through a genetic algorithm to obtain an optimized two-dimensional imaging result; and fitting a change curve of a target azimuth angle to obtain a first-order coefficient, so that y-axis information corresponding to the target is obtained, and finally completing three-dimensional imaging of the target. According to the method, the influence of the field intensity change on the imaging effect after the vortex waves in different modes are turned is considered, and meanwhile, the compressed sensing and the genetic algorithm are combined, so that the requirement of vortex imaging on the mode number is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of radar imaging, and in particular relates to a compression sensing vortex imaging method, storage medium and application based on mode selection. Background technique [0002] At present, compared with optical imaging technology, radar imaging technology has the ability to continue imaging despite the influence of natural conditions such as atmospheric disturbances and clouds. It is an information acquisition method that can function in all time and all weather conditions. Compared with the traditional plane wave radar, which only has a difference in distance and cannot provide azimuth resolution under the geometric conditions of staring observation, vortex electromagnetic radar emits a vortex wavefront with a spiral phase wavefront due to carrying Orbital Angular Momentum (OAM). The vortex electromagnetic wave has a phase difference in both the range direction and the azimuth direction. Using this phase d...

AI Technical Summary

Problems solved by technology

[0004] Through the above analysis, the problems and defects of the existing technology are: due to the difference in field strength after the beam steering of different modal vortex waves, the current vortex imaging compressive sensing algorithm does not consider the use of different modalities after beam steering Effect of Sequence on Imaging Quality

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