A modified range migration algorithm for airborne squint-mode spotlight SAR imaging

Author

Daoxiang, An ; Xiaotao, Huang ; Tian, Jin ; Zhimin, Zhou

Author_Institution

Sch. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China

fYear

2010

fDate

10-14 May 2010

Firstpage

1183

Lastpage

1186

Abstract

Due to the reference signal based on the fixed reference range is used in the range migration (RM) algorithm, the RM algorithm is not available to process an airborne squint-mode spotlight synthetic aperture radar (SAR) data. Thus, a modified RM algorithm is developed, which can be applied on processing large scene squinted-mode spotlight SAR data without division. Based on the squint-mode spotlight SAR imaging geometry, the modified reference signal is used to dechirp the received signal. Then, using the principle of stationary phase, the presented formulation of the modified RM algorithm is analyzed. Finally, the effectiveness of the proposed method is demonstrated by some numerical simulations via a squint-mode spotlight SAR simulator.

Keywords

airborne radar; numerical analysis; radar imaging; synthetic aperture radar; airborne squint-mode spotlight SAR imaging geometry; modified range migration algorithm; stationary phase, principle; synthetic aperture radar data; Algorithm design and analysis; Azimuth; Data engineering; Degradation; Geometry; Interpolation; Layout; Radar polarimetry; Signal processing; Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Radar Conference, 2010 IEEE

Conference_Location

Washington, DC

ISSN

1097-5659

Print_ISBN

978-1-4244-5811-0

Type

conf

DOI

10.1109/RADAR.2010.5494439

Filename

5494439