Title :
Focusing Azimuth-Invariant Bistatic SAR Data With Chirp Scaling
Author :
Li, Feng ; Li, Shu ; Zhao, Yigong
Author_Institution :
Sch. of Electron. Eng., Xidian Univ., Xi´´an
fDate :
7/1/2008 12:00:00 AM
Abstract :
This letter presents a bistatic chirp scaling algorithm to processing the azimuth-invariant bistatic synthetic aperture radar data. Two methods are used to derive the different parts of the range-Doppler expression of the point target. Compared with the method relying on the two-order expansion of the bistatic range model, the new algorithm can give the close-form azimuth modulation. Through the introduction of the fractional Fourier transform into the range processing, the resolutions are enhanced further.
Keywords :
Doppler effect; Fourier transforms; geophysical signal processing; geophysical techniques; radar signal processing; remote sensing by radar; synthetic aperture radar; azimuth invariant bistatic SAR data; bistatic chirp scaling algorithm; close form azimuth modulation; fractional Fourier transform; point target range-Doppler expression; radar signal processing; range processing; synthetic aperture radar; Bistatic CSA (BiCSA); bistatic SAR (BiSAR); chirp scaling algorithm (CSA); fractional Fourier transform (FrFT); point target spectrum (PTS); series reversion; synthetic aperture radar (SAR);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2008.921743
