A Quartic Algorithm For Squint Sar Imaging

Author

Wang, Kaizhi ; Liu, Xingzhao

Author_Institution

Dept. of Electron. Eng., Shanghai Jiao Tong Univ.

Volume

4

fYear

2006

fDate

14-19 May 2006

Abstract

In this paper some improvements of non-linear chirp scaling (NCS) approach are proposed and a modified algorithm based on the NCS is described. The improvements include three main aspects. A quartic polynomial model is adopted to represent SAR signal in range-Doppler domain and 2-D frequency domain to improve precision. A constant scaling factor is employed to replace the reference frequency in the NCS, which makes NCS more flexible. A second chirp scaling operation is added to the end of the NCS so as to remove scaling effect on range direction of SAR image. Those improvements make NCS applicable to process highly squinted SAR data from a large range swath at a fine resolution

Keywords

Doppler radar; frequency-domain analysis; radar imaging; synthetic aperture radar; 2D frequency domain; constant scaling factor; nonlinear chirp scaling; quartic algorithm; range-Doppler domain; squint SAR imaging; Aperture antennas; Chirp; Directive antennas; Filters; Focusing; Frequency domain analysis; Polynomials; Radar antennas; Radar polarimetry; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1661179

Filename

1661179