Title :
A geometry-based Doppler ambiguity resolver for bistatic forward-looking SAR
Author :
Li, Wenchao ; Yang, Jianyu ; Huang, Yulin ; Wu, Junjie ; Kong, Lingjiang
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Based on the analysis of the range migration characteristic of bistatic forward-looking SAR, a geometry-based Doppler ambiguity resolver is proposed in this paper. This method estimates the Doppler centroid first using edge detection and least square fitting techniques. Combined with the baseband Doppler centroid estimation method, it can more rapidly resolve the Doppler ambiguity number. Besides, it does not need the prior information of the radar platform velocity and angle. Simulation results verified the effectiveness of this method.
Keywords :
edge detection; least squares approximations; radar imaging; synthetic aperture radar; Doppler ambiguity number; baseband Doppler centroid estimation; bistatic forward-looking SAR; edge detection; geometry-based Doppler ambiguity resolver; least square fitting; radar platform velocity; range migration characteristic; Baseband; Doppler radar; Flowcharts; Geometry; Image edge detection; Layout; Least squares approximation; Solid modeling; Synthetic aperture radar; Transmitters;
Conference_Titel :
Radar Conference, 2010 IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-5811-0
DOI :
10.1109/RADAR.2010.5494599
