Millimeter wave synthetic aperture radar imaging method, device, equipment and storage medium

Abstract

The invention relates to a millimeter wave synthetic aperture radar imaging method, apparatus and device, and a storage medium. The method comprises the steps of collecting echo data of a linear frequency modulation signal emitted by a synthetic aperture radar moving along a linear track at a preset speed to a target; a synthetic aperture of the synthetic aperture radar is divided into a plurality of sub-apertures in sequence, and an overlapping section exists between any two adjacent sub-apertures; for each sub-aperture, performing range Fourier transform on the echo data corresponding to the sub-aperture to obtain a transformed echo matrix corresponding to the sub-aperture, and projecting the transformed echo matrix into a two-dimensional imaging coordinate system according to a preset algorithm to obtain a two-dimensional imaging result; and splicing the two-dimensional imaging results corresponding to all the sub-apertures to obtain a total imaging result corresponding to the synthetic aperture, and dividing the synthetic aperture of the synthetic aperture radar into a plurality of sub-apertures in sequence, so that the imaging frame rate is improved, and a high-quality video SAR image can be output.

Description

technical field [0001] The present invention relates to the technical field of radar signal processing, in particular to a millimeter-wave synthetic aperture radar imaging method, device, equipment and storage medium. Background technique [0002] Synthetic Aperture Radar (SAR, Synthetic Aperture Radar), especially vehicle-mounted millimeter-wave synthetic aperture radar, has played an important role in assisted safe driving, man-made building mapping, human safety imaging and other applications by virtue of its advantages of miniaturization, low cost and high resolution. important role. In the context of complex urban applications, SAR usually needs to monitor the dynamic changes of the scene, and obtain real-time information such as geographic location, motion status, and trajectory of high-value targets. Therefore, based on the needs of dynamic monitoring of scenes and extraction of high-value target motion parameters, video SAR imaging technology has been more and more ...

AI Technical Summary

Problems solved by technology

[0003] However, video SAR imaging is still in the experimental stage. To put it into practical application, the following technical difficulties need to be solved. Due to the constraints of multiple parameters such as radar movement speed, maximum operating range, and azimuth resolution, the imaging frame rate of synthetic aperture radar Low, it is difficult to obtain SAR images in real time

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