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

Volume

10

Issue

5

fYear

2013

fDate

Sept. 2013

Firstpage

1080

Lastpage

1084

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(N^2.5). 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);

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2012.2230243

Filename

6417954