Satellite-borne sliding bunching synthetic aperture radar imaging method based on Taylor expansion

The invention discloses a satellite-borne sliding bunching synthetic aperture radar imaging method based on Taylor expansion. The invention provides a high-resolution imaging method based on multivariable Taylor expansion in order to solve the problems of curved orbit and azimuth frequency spectrum...

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Hauptverfasser: KUANG HUAXING, QIAN YULEI, HUANG YUAN, YANG HAOCHENG
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention discloses a satellite-borne sliding bunching synthetic aperture radar imaging method based on Taylor expansion. The invention provides a high-resolution imaging method based on multivariable Taylor expansion in order to solve the problems of curved orbit and azimuth frequency spectrum aliasing in high-resolution imaging of a satellite-borne sliding spotlight synthetic aperture radar. The method is based on Taylor expansion and numerical differentiation, adopts Taylor expansion to describe a curved orbit and utilizes numerical differentiation to realize Derostation under the condition of the curved orbit, so that defocusing phenomena caused by the curved orbit and azimuth spectrum aliasing in imaging are respectively eliminated; and then a traditional range migration algorithm is improved by using multivariate Taylor expansion, so that the method adapts to a curved orbit, and high-resolution imaging of spaceborne sliding bunching synthetic aperture radar echo data is realized. The algorithm is a