An approach to SAR imaging by means of non-uniform FFTs

Author

Subiza, B. ; Gimeno-Nieves, E. ; Lopez-Sanchez, J.M. ; Fortuny-Guasch, J.

Author_Institution

DFISTS, Alicante Univ., Spain

Volume

6

fYear

2003

fDate

21-25 July 2003

Firstpage

4089

Abstract

In this study, the potential use of the non-uniform FFT (NUFFT) in SAR imaging is analyzed. The main objective has been the improvement of the computational efficiency and image accuracy of seismic migration SAR processing. Different NUFFT methods have been implemented and tested in order to choose an adequate technique for the imaging problem. Our approach consists in substituting both the Stolt interpolation and the final range inverse FFT, in the ω-k algorithm, by a single NUFFT. Numerical simulations illustrate the performance of the new method and the influence of the selection of NUFFT parameters in the precision and computation time of the SAR imaging algorithm.

Keywords

fast Fourier transforms; geophysical techniques; interpolation; radar imaging; synthetic aperture radar; NUFFT; SAR imaging algorithm; Stolt interpolation; computation time; computational efficiency; nonuniform fast Fourier transform; numerical simulations; seismic migration SAR processing; Backscatter; Computational efficiency; Fourier transforms; Frequency domain analysis; Image analysis; Interpolation; Numerical simulation; Performance analysis; Radar polarimetry; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International

Print_ISBN

0-7803-7929-2

Type

conf

DOI

10.1109/IGARSS.2003.1295371

Filename

1295371