DocumentCode :
3136700
Title :
A Doppler parameters estimation technique for squint SAR imaging
Author :
Xie, Huaying ; Zhao, Hongzhong ; Fu, Qiang ; Tang, Guangfu
Author_Institution :
ATR Lab., Nat. Univ. of Defense Technol., Changsha
fYear :
2008
fDate :
2-5 Sept. 2008
Firstpage :
402
Lastpage :
406
Abstract :
An essential part of SAR processing is the estimation of the Doppler parameters of the received data-the Doppler centroid and the Doppler frequency rate. This paper proposes a Doppler parameters estimation technique for squint SAR imaging, where the estimation of the Doppler frequency rate is dependent on that of the Doppler centroid. It estimates the Doppler centroid based on the relationship of the Doppler centroid and the range cell migration (RCM), and estimates the Doppler frequency rate using an improved Radon ambiguity transform (RAT) method based on the data aligned according to the RCM trajectory. This technique needs no prior knowledge of the radar platform velocity and the beam squint angle, and shows good performance of estimating the Doppler parameters. Simulation results demonstrate the validity of the method.
Keywords :
Doppler radar; Radon transforms; parameter estimation; radar imaging; Doppler frequency rate; Doppler parameters estimation technique; Radon ambiguity transform; radar platform velocity; range cell migration; squint SAR imaging; Azimuth; Doppler radar; Focusing; Frequency estimation; Geometry; Parameter estimation; Radar imaging; Radar polarimetry; Solid modeling; Time frequency analysis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Radar, 2008 International Conference on
Conference_Location :
Adelaide, SA
Print_ISBN :
978-1-4244-2321-7
Electronic_ISBN :
978-1-4244-2322-4
Type :
conf
DOI :
10.1109/RADAR.2008.4653955
Filename :
4653955
Link To Document :
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