西安电子科技大学学报（自然科学版）Issue(3)：26-32,7.DOI:10.3969/j.issn.1001-2400.2014.03.005
相位梯度自聚焦在FFBP聚束SAR处理中的应用
Phase gradient autofocus within FFBP flow for spotlight SAR processing
摘要
Abstract
Fast Factorized Back-Projection ( FFBP) is an effective algorithm constructed based on aperture factorization . It is shown that the image quality is barely sacrificed compared with Back-Projection ( BP) . Different from frequency domain algorithms , SAR images reconstructed by FFBP cannot satisfy the requirement of autofocus . To solve this problem , we propose an improved FFBP ( IFFBP) by introducing a fire-new coordinate system in this paper . Then , IFFBP can provide autofocus with Fourier transform pairs ( FTP) between the image domain and the range compressed phase history domain . With a different framework of the overlapped subaperture in different stages , phase gradient autofocus ( PGA ) can be embedded into IFFBP to obtain a robust estimation of the phase error . Finally , the processed results of the collected data set validate this approach in spotlight SAR imagery .关键词
改进快速分解后向投影/虚拟极坐标系/傅里叶变换对/相位梯度自聚焦/运动补偿Key words
fast factorized back-projection ( IFFBP)/pseudopolar coordinates/Fourier transform pairs/phase gradient autofocus/motion compensation分类
信息技术与安全科学引用本文复制引用
李浩林,陈露露,张磊,邢孟道,保铮..相位梯度自聚焦在FFBP聚束SAR处理中的应用[J].西安电子科技大学学报（自然科学版）,2014,(3):26-32,7.基金项目
国家自然科学基金优秀青年基金项目资助 （）
