A subband algorithm for real-time autofocusing of SAR images

Author

Bierens, Laurens

Author_Institution

TNO Phys. & Electron. Lab., The Hague, Netherlands

Volume

2

fYear

1994

fDate

8-12 Aug. 1994

Firstpage

915

Abstract

Presents an autofocusing algorithm for real-time synthetic aperture radar (SAR) processing. The algorithm is based on the fact that time shifts between subband SAR images represent the phase errors due to motion errors during the flight of the radar platform. The subband SAR images are generated by subband decomposition of the high-resolution high-contrast area of a complex SAR image. The successive steps of the subband algorithm have low complexity compared to conventional autofocus algorithms and can be implemented efficiently in hardware.

Keywords

airborne radar; focusing; radar imaging; real-time systems; spaceborne radar; synthetic aperture radar; SAR images; autofocusing algorithm; complexity; high-resolution high-contrast area; motion error; phase errors; radar platform; real-time autofocusing; subband algorithm; subband decomposition; synthetic aperture radar; time shifts; Azimuth; Focusing; Frequency; Hardware; Image generation; Pulse compression methods; Radar imaging; Signal processing algorithms; Signal resolution; Spaceborne radar; Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1994. IGARSS '94. Surface and Atmospheric Remote Sensing: Technologies, Data Analysis and Interpretation., International

Print_ISBN

0-7803-1497-2

Type

conf

DOI

10.1109/IGARSS.1994.399299

Filename

399299