NDLI: A deramp chirp scaling algorithm for processing spaceborne spotlight SAR data

Content Provider	IEEE Xplore Digital Library
Author	Wang Guodong
Copyright Year	2004
Description	Author affiliation: Sch. of Electron. & Inf. Eng., Beijing Jiaotong Univ., China (Wang Guodong)
Abstract	Based on two-step algorithm and chirp scaling algorithm, a deramp chirp scaling (DCS) algorithm for processing high-resolution spaceborne spotlight synthetic aperture radar (SAR) data is presented. The algorithm combines the advantages of SPECAN algorithm and chirp scaling algorithm. Firstly, the azimuth coarse focusing is achieved via a deramp processing with constant Doppler rate, and the azimuth spectral folding phenomenon, which is typical for spaceborne spotlight SAR, was overcome. Secondly, the precise range focusing is achieved by chirp scaling principle, and the residual azimuth phase error is compensated, so the refined azimuth focusing is acquired. Based on the squinted equivalent range model that is fitter for spaceborne geometrical relation than the broadside range model, the complete derivation of the algorithm is presented and the realizing approach is given. Finally, the computer simulation shows the validity of the algorithm.
Starting Page	659
Ending Page	663
File Size	262044
Page Count	5
File Format	PDF
ISBN	0780384016
DOI	10.1109/ICMMT.2004.1411615
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-08-18
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Chirp Azimuth Spaceborne radar Synthetic aperture radar Focusing Solid modeling Bandwidth Radar scattering Millimeter wave technology Signal resolution
Content Type	Text
Resource Type	Article

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