Omega-k Algorithm for Airborne Forward-Looking Bistatic Spotlight SAR Imaging

Author

Shin, Hee-Sub ; Lim, Jong-Tae

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon

Volume

6

Issue

2

fYear

2009

fDate

4/1/2009 12:00:00 AM

Firstpage

312

Lastpage

316

Abstract

For flexibility and cost reduction, the forward-looking bistatic spotlight synthetic aperture radar (FL-BSSAR) which uses the side-looking transmitter and the forward-looking receiver has been studied recently. For the FL-BSSAR imaging, we introduce a modified omega-k algorithm. Specifically, using rotation and shifting of the receiver path and resampling of the transmitter path, we convert the FL-BSSAR into the side-looking BSSAR. Then, we modify the matched filter and Stolt interpolation using the principle of the stationary phase to obtain the SAR image. Simulation results show that the modified omega-k algorithm enhances the image quality.

Keywords

airborne radar; geophysical signal processing; interpolation; matched filters; radar receivers; radar signal processing; radar transmitters; remote sensing by radar; synthetic aperture radar; FL-BSSAR imaging; Stolt interpolation; airborne SAR imaging; bistatic spotlight SAR imaging; forward looking SAR imaging; forward looking receiver; matched filter; omega-k algorithm; receiver path rotation; receiver path shifting; side looking BSSAR; side looking transmitter; stationary phase principle; transmitter path resampling; Forward-looking bistatic spotlight synthetic aperture radar (FL-BSSAR); omega-k algorithm;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2008.2011924

Filename

4776449