Fast Backprojection Algorithm for Bistatic SAR Imaging
Fast Backprojection Algorithm for Bistatic SAR Imaging
复制标题
双基地SAR成像的快速反投影算法
DOI：
10.1109/lgrs.2012.2230243
复制
发表时间：
2013-09-01
影响因子：
4.8
通讯作者：
Loffeld, Otmar
中科院分区：
文献类型：
--
作者：
Shao, Yun Feng;Wang, Robert;Loffeld, Otmar
本文提出了一种用于双基地合成孔径雷达成像的快速反投影算法（FBPA）。对于距离压缩，地面接收机的同步通道记录的信号被用作匹配滤波器来压缩回波信号。该方法可以降低对星轨测量和同步精度的要求。对于方位压缩，实施二次相位校正以减小由FBPA中涉及的近似引起的影响。该算法的计算复杂度为O（N-2.5）。将该算法应用于图形处理单元中，并通过仿真和真实的原始数据进行了验证。
In this letter, a fast backprojection algorithm (FBPA) is proposed for bistatic synthetic aperture radar imaging. For range compression, the signal recorded by the synchronization channel of the receiver on the ground is used as a matched filter to compress the echo signal. This method can reduce the requirements of satellite-orbit measurement and synchronization precision. For azimuth compression, a secondary phase correction is implemented to reduce the effect caused by the approximation involved in the FBPA. The computational complexity of the proposed algorithm is O(N-2.5). The proposed algorithm is applied in a graphics processing unit and verified by simulation and real raw data.