Title :
An N2.5 back-projection algorithm for SAR imaging
Author :
Shao, Yunfeng ; Wang, Robert ; Deng, Yunkai ; Liu, Yue ; Chen, Runpu ; Liu, Gang
Author_Institution :
Dept. of Space Microwave Remote Sensing Syst., Inst. of Electron., Beijing, China
Abstract :
In this paper, a modified fast back projection (FBP) algorithm is proposed for Synthetic Aperture Radar (SAR) imaging. The azimuth compression of the proposed FBP is divided into sub-image process and finial image process. The secondary phase correction is used to reduce the error cause by approximation before the finial image process. The interlace sub-image grid method makes image quality uniform for all the pixel in the finial image. The applicability limitations and the sub-image two dimensions over sample method are presented. The computational complexity of the proposed FBP is O(N2.5). Simulation on GPU is given to verify the proposed method efficacious.
Keywords :
computational complexity; data compression; image coding; radar imaging; synthetic aperture radar; FBP algorithm; GPU; N2.5 back-projection algorithm; SAR imaging; azimuth compression; computational complexity; error reduction; fast back projection algorithm; finial image process; image quality; interlace subimage grid method; secondary phase correction; subimage process; synthetic aperture radar imaging; Approximation algorithms; Approximation methods; Azimuth; Computational complexity; Image coding; Imaging; Synthetic aperture radar; FBP; SAR; interlace sub-image grid; secondary phase correction;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2012.6351088
