NDLI: Imaging and locating multiple ground moving targets based on keystone transform and FrFT for single channel SAR system

Content Provider	IEEE Xplore Digital Library
Author	Hang Yi Chong-yi Fan Jun-gang Yang Xiao-tao Huang
Copyright Year	2009
Description	Author affiliation: College of Electronic Science and Engineering, NUDT, Changsha Hunan 410073, China (Hang Yi; Chong-yi Fan; Jun-gang Yang; Xiao-tao Huang)
Abstract	Synthetic aperture radar (SAR) imaging techniques have been successfully developed for static ground targets, but if the moving target returns are processed in the conventional imaging way, the resulting SAR image of moving targets will appear blurred and be misplaced in azimuth direction. In this paper, we proposed a method which is based on keystone transform and fractional Fourier transform (FrFT) to solve these problems. Firstly, first order keystone transform is performed on range compression results to correct range walk, then estimates of Doppler Centroid and Doppler modulation rate are obtained by using fractional Fourier transform, finally focused image of multiple moving targets is achieved by making use of the Doppler estimates. It can ascertain initial positions of multiple moving targets; moreover, it can estimate azimuth velocity, radial velocity and radial acceleration for every moving target. The simulation results show that this method can image and locate multiple ground moving targets effectively.
Starting Page	771
Ending Page	774
File Size	202615
Page Count	4
File Format	PDF
ISBN	9781424427314
DOI	10.1109/APSAR.2009.5374170
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fractional Fourier Transform(FrFT) Fourier transforms Parameter estimation Synthetic Aperture Radar(SAR) Time frequency analysis History Parameter Estimation Chirp modulation Azimuth Keystone Transform Layout Acceleration Imaging and Locating Multiple Ground Moving Targets Synthetic aperture radar Microwave imaging
Content Type	Text
Resource Type	Article

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