Title :
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
fDate :
5/1/2012 12:00:00 AM
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;
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2011.2173291
