A Prior 2-D Autofocus Algorithm With Ground Cartesian BP Imaging for Curved Trajectory SAR

• Published in: IEEE journal of selected topics in applied earth observations and remote sensing Vol. 17; pp. 2422 - 2436
• Main Authors: Lou, Yishan, Lin, Hao, Li, Ning, Xing, Mengdao, Wang, Junrui, Wu, Zhixin
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Cartesian coordinates; Cell migration; Curved trajectory; Error correction; ground cartesian back-projection (GCBP); Image resolution; Imaging; Imaging techniques; index grid division algorithm; Interpolation; Phase error; prior structure; Radar imaging; Signal processing algorithms; Signal resolution; spectrum alignment; Synthetic aperture radar; synthetic aperture radar (SAR); Trajectories; Trajectory; two-dimensional (2-D) phase error

Due to the complexity of the trajectory, the curved trajectory SAR signal is seriously two-dimensional (2-D) space-variant. The ground Cartesian back-projection (GCBP) algorithm is a fast time-domain algorithm without interpolation, which can meet the imaging accuracy of curved trajectory SAR. Howev...