Title :
Fast Backprojection Algorithm for Bistatic SAR Imaging
Author :
Yun Feng Shao ; Wang, Ruiqi ; Yun Kai Deng ; Liu, Yanbing ; Runpu Chen ; Gang Liu ; Loffeld, Otmar
Author_Institution :
Grad. Univ. of Chinese Acad. of Sci., Beijing, China
Abstract :
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(N2.5). The proposed algorithm is applied in a graphics processing unit and verified by simulation and real raw data.
Keywords :
computational complexity; echo; graphics processing units; matched filters; radar imaging; synchronisation; synthetic aperture radar; FBPA; azimuth compression; bistatic SAR imaging; bistatic synthetic aperture radar imaging; computational complexity; echo signal compression; fast backprojection algorithm; graphics processing unit; matched filter; range compression; receiver; satellite-orbit measurement; secondary phase correction; synchronization channel; synchronization precision; Approximation algorithms; Approximation methods; Azimuth; Imaging; Receivers; Synchronization; Synthetic aperture radar; Bistatic synthetic aperture radar; computational complexity; fast backprojection algorithm (FBPA); graphics processing unit (GPU);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2012.2230243
