Moving target detection method and device, equipment and medium

By combining sub-aperture segmentation and back projection imaging with deep learning semantic segmentation technology, the defocusing and information disconnection problems of moving target detection under long synthetic aperture conditions are solved, achieving high-precision pixel-level detection and echo domain signal inversion, which is suitable for moving target detection in single-channel systems.

CN121541162APending Publication Date: 2026-02-17AEROSPACE INFORMATION RES INST CAS
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Patent Information

Application Number
CN202511776790.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-28
Publication Date
2026-02-17

AI Technical Summary

Technical Problem

Under long synthetic aperture time observation conditions, moving target detection faces serious defocusing and positional shift problems. Existing methods are unable to achieve high-precision detection, and there is a lack of effective correlation mechanism between echo domain and image domain detection, resulting in insufficient detection accuracy and information disconnect.

Method used

A processing framework combining sub-aperture segmentation and back projection imaging is adopted, and deep learning semantic segmentation technology is introduced. By performing sub-aperture segmentation and image sequence processing on full aperture data, pixel-level accurate detection and cross-domain information inversion are achieved. Target segmentation and echo signal inversion are performed in conjunction with a deep learning model.

Benefits of technology

It significantly improves the accuracy and signal-to-noise ratio of moving target detection, achieves pixel-level precise segmentation and accurate positioning of echo domain signals, reduces system complexity, is suitable for single-channel systems, and is adaptable to moving target detection in various scenarios.

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Abstract

The invention provides a moving target detection method which can be applied to the technical field of radar signal processing and artificial intelligence. The method comprises the following steps: carrying out sub-aperture segmentation on full-aperture spaceborne synthetic aperture radar echo data in an azimuth direction to obtain multiple pieces of sub-aperture data; performing distance compression, phase compensation and backward projection imaging processing on each piece of sub-aperture data to generate a sub-aperture image sequence; processing the sub-aperture image sequence by using a pre-trained deep learning semantic segmentation model to obtain a pixel-level segmentation mask of the moving target; and inverting the peak position of the moving target in the echo signal after distance compression based on the pixel-level segmentation mask. The invention also provides a moving target detection device, equipment and a medium.
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