Improved PGA algorithm based on adaptive range bins selection

Author

Deng, Yuan ; Zhang, Yunhua

Author_Institution

Center for Space Sci. & Appl. Res., Chinese Acad. of Sci., Beijing, China

fYear

2010

fDate

9-11 April 2010

Firstpage

232

Lastpage

235

Abstract

Phase gradient autofocus (PGA) algorithm has been proved to be a superior method for higher order phase error correction in SAR/ISAR image post processing. However, the accuracy of phase error estimation using traditional PGA algorithm is usually not guaranteed especially when there are several strong adjacent scatterers in a range bin. In this paper an improved iterative PGA approach based on adaptive range bins selection is presented. Results of real data experiments show that the improved PGA algorithm outperforms the traditional one.

Keywords

error correction; gradient methods; phase estimation; radar imaging; synthetic aperture radar; ISAR image; PGA algorithm; SAR image; adaptive range bins selection; phase error correction; phase error estimation; phase gradient autofocus; Azimuth; Electronics packaging; Error analysis; Error correction; Focusing; Image resolution; Iterative algorithms; Radar imaging; Radar scattering; Synthetic aperture radar; autofocus; phase error correction; phase gradient autofocus (PGA); radar imaging; range bins selection; synthetic aperture radar (SAR);

fLanguage

English

Publisher

ieee

Conference_Titel

Image Analysis and Signal Processing (IASP), 2010 International Conference on

Conference_Location

Zhejiang

Print_ISBN

978-1-4244-5554-6

Electronic_ISBN

978-1-4244-5556-0

Type

conf

DOI

10.1109/IASP.2010.5476125

Filename

5476125