NDLI: Nonlinear FM frequency scaling method for processing squint mode spotlight SAR

Content Provider	IEEE Xplore Digital Library
Author	Lihua Jin Xingzhao Liu
Copyright Year	2005
Description	Author affiliation: Dept. of Electron. Eng., Shanghai Jiao Tong Univ., China (Lihua Jin; Xingzhao Liu)
Abstract	This paper presents a method for squint mode spotlight SAR imaging. The method bases on the frequency scaling algorithm (FSA) and improves imaging quality of targets far away from scene center in range. For applying to squint mode, the dechirp function and some compensation functions of the FSA are modified. In this paper, unfocused imaging within both sides of range swath in the case of larger range swath and squint mode are analyzed particularly. The nonlinear FM filtering method is combined with the frequency scaling operation to obtain exactly focused image. Simulation results of point targets are given to show the improvement of and demonstrate the validity of the proposed algorithm.
Sponsorship	Nat. Capital Area Council IEEE Aerospace and Electron. Syst. Soc. RADAR Syst. Panel
Starting Page	811
Ending Page	815
File Size	344864
Page Count	5
File Format	PDF
ISBN	078038881X
DOI	10.1109/RADAR.2005.1435938
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-05-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency Layout Azimuth Filters Geometry Apertures Radar polarimetry Image analysis Filtering Focusing
Content Type	Text
Resource Type	Article

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Nonlinear FM frequency scaling method for processing squint mode spotlight SAR