A coordinate-transform based FFBP algorithm for high-resolution spotlight SAR imaging

作者：Yang ZeMin^*; Xing MengDao; Zhang Lei; Bao Zheng

来源：Science China Information Sciences, 2015, 58(2): 020303.

DOI：10.1007/s11432-014-5262-x

• spotlight
• synthetic aperture radar (SAR)
• fast factorized back-projection (FFBP)
• coordinate-transform (CT)

This paper proposes a coordinate-transform (CT) implementation for the fast factorized back-projection (FFBP) algorithm (CT-FFBP) to process high-resolution spotlight synthetic aperture radar (SAR) data. Unlike the FFBP utilizing two-dimensional image-domain interpolation for sub-aperture fusion, CT-FFBP finishes the image-projection using CT with the accommodation of chirp-s transform and circular shifting. Without interpolation, CT-FFBP yields enhanced efficiency over the interpolation based FFBP, besides maintaining high precision simultaneously. Both simulation and real-data experiments verifies the efficiency and precision superiorities of the CT-FFBP.

• 出版日期2015-2
• 单位西安电子科技大学