A shadow inverse synthetic aperture imaging method using back projection
By employing the shadow inverse synthetic aperture imaging method with back projection, and using a precise slant range model to construct a reference signal for signal processing, the resolution loss problem of the SISAR algorithm with large diffraction angles is solved, and high-resolution target contour imaging and recognition are achieved.
CN116047514BActive Publication Date: 2026-05-26BEIJING INST OF TECH +2
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING INST OF TECH
- Filing Date
- 2023-01-05
- Publication Date
- 2026-05-26
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Figure CN116047514B_ABST
Abstract
This invention relates to the field of radar imaging technology, and more particularly to a shadow inverse synthetic aperture imaging method employing back projection. The proposed method utilizes a forward-scattering surface target scattering model to provide a reference signal, and then performs correlation processing between the reference signal and the target echo, theoretically achieving optimal imaging resolution. Since it does not employ slant-range approximation, this method is applicable to any relative positional relationship between the target and the radar, thus eliminating phase errors caused by the target obliquely crossing the baseline. This offers an advantage over traditional large diffraction angle algorithms when the target does not perpendicularly cross the baseline.
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