一种基于快速分解后向投影的条带SAR成像新方法  

Innovative Strategy for Stripmap SAR Imaging Using Fast Factorized Back-projection

作　　者：李浩林[1] 张磊[1] 邢孟道[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安710071

出　　处：《电子与信息学报》2015年第8期1808-1813,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61301280)资助课题

摘　　要：快速分解后向投影(Fast Factorized Back-Projection,FFBP)最初用于超宽带SAR成像,并在聚束SAR信号处理领域取得了巨大的成功。然而,由于积分孔径和角域升采样的限制,FFBP算法难以直接用于条带SAR处理。为了提高FFBP算法在条带SAR处理的实用性,该文从积分孔径和角域波数带宽的角度出发,提出一种适用于条带SAR处理的重叠图像法。该方法极大地保留FFBP算法的运算效率,有效地避免因角域升采样带来数据量大的问题。最后,通过斜视条带SAR仿真实验验证了该方法的有效性。Fast Factorized Back-Projection （FFBP） is originally developed for Ultra-WideBand （UWB） Synthetic Aperture Radar （SAR）, and it shows great success for spotlight SAR signal processing. However, its implementation is not straightforward for stripmap SAR due to the limitation of integration aperture and angular upsampling. To investigate the applicability of FFBP to stripmap SAR, this paper describes a reasonable implementation of overlapped-image method based on integration aperture and angular wavenumber bandwidth. This approach retains high efficiency of the original FFBP. Finally, the simulated squinted SAR data are utilized to verify the effectiveness of the proposed method.

关 键 词：合成孔径雷达 后向投影积分 快速分解后向投影 积分孔径 角波数带宽 

分 类 号：TN957.52[电子电信—信号与信息处理]