Sub-aperture phase error stitching for full aperture airborne SAL data processing method based on azimuth deramp
作者： Liang Guo , Hongfei Yin , Lichao Yang , Guangcai Sun , Mengdao Xing
DOI: 10.1016/J.OPTLASTEC.2020.106708
关键词: Azimuth 、 Data processing 、 Autofocus 、 Synthetic aperture radar 、 Lidar 、 Image stitching 、 Aperture 、 Phase (waves) 、 Algorithm 、 Computer science
摘要: Abstract Synthetic Aperture Ladar (SAL) is a combination of synthetic aperture and lidar. At present, sub-aperture stitching with PGA algorithm used to realize SAL imaging. However, this has low rate data utilization, resulting in worse image SNR resolution. For solving problem, method phase error for full airborne processing based on azimuth deramp proposed paper. The divided into sequence sub-apertures the standard Standard Minimum Entropy Autofocus (MEA) estimate each sub-aperture. Then all errors are stitched obtain full-aperture error. After compensation error, obtained by deramp. Compared algorithm, we can offer better resolution SNR. Finally, imaging results real verify effectiveness algorithm.
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