Polar Format Algorithm Wavefront Curvature Compensation Under Arbitrary Radar Flight Path

Author

Mao, Xinhua ; Zhu, Daiyin ; Zhu, Zhaoda

Author_Institution

Coll. of Electron. & Inf. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

Volume

9

Issue

3

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

526

Lastpage

530

Abstract

An improved space-variant postfiltering approach to compensate for the wavefront curvature effect in polar format imagery is presented in this letter. The main contribution of this new method is the construction of a space-variant filter, which is based on exploiting the endomorphism property of the polar format transformation. The new approach provides an accurate and general solution to wavefront curvature compensation under arbitrary radar flight path. Finally, point target simulation has validated the effectiveness of the new approach.

Keywords

adaptive optics; filtering theory; geophysical image processing; geophysical techniques; radar imaging; remote sensing by radar; synthetic aperture radar; SAR image; arbitrary radar flight path; endomorphism property; point target simulation; polar format algorithm wavefront curvature compensation; polar format imagery; polar format transformation; space-variant postfiltering approach; History; Imaging; Radar imaging; Signal processing algorithms; Synthetic aperture radar; Taylor series; Arbitrary flight path; polar format algorithm (PFA); synthetic aperture radar (SAR); wavefront curvature compensation;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing Letters, IEEE

Publisher

ieee

ISSN

1545-598X

Type

jour

DOI

10.1109/LGRS.2011.2173291

Filename

6094167