Autofocus: The key to a high SAR resolution

Author

Bezvesilniy, O. ; Gorovyi, I. ; Vavriv, D.

Author_Institution

Dept. of Microwave Electron., Inst. of Radio Astron., Kharkov, Ukraine

fYear

2012

fDate

28-30 Aug. 2012

Firstpage

504

Lastpage

507

Abstract

Uncompensated phase errors lead to a significant quality degradation of images obtained with a synthetic aperture radar (SAR). In the paper, an efficient approach to the SAR autofocusing is proposed. The main idea of the method is the usage of independent local phase error estimates on short time intervals for an arbitrary phase error reconstruction. The residual phase error is retrieved via a double integration of the estimated time-series of the second derivative of the phase error. A high efficiency of the approach is confirmed by experimental results.

Keywords

image reconstruction; image resolution; phase estimation; radar imaging; radar resolution; synthetic aperture radar; time series; arbitrary phase error reconstruction; autofocusing SAR resolution; image quality degradation; independent local phase error estimation; residual phase error retrieval; second phase error derivative; synthetic aperture radar; time-series estimation; uncompensated phase error; Aircraft; Approximation methods; Electromagnetics; Extraterrestrial measurements; Image resolution; Signal processing algorithms; Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Mathematical Methods in Electromagnetic Theory (MMET), 2012 International Conference on

Conference_Location

Kyiv

ISSN

2161-1734

Print_ISBN

978-1-4673-4478-4

Type

conf

DOI

10.1109/MMET.2012.6331256

Filename

6331256