Title :
An adaptive iterative scheme of Doppler centroid estimation for bistatic forward-looking SAR
Author :
Li, Wenchao ; Yang, Jianyu ; Wu, Junjie ; Huang, Yulin ; Kong, Lingjiang
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
For high quality synthetic aperture radar (SAR) processing, Doppler centroid estimation is an essential procedure. According to the range migration characteristic of bistatic forward-looking SAR, an adaptive iterative scheme of Doppler centroid estimation is proposed in this paper. This scheme utilizes the fact that, in the range compressed and azimuth time domain, the range migration slope of point target response is proportional to the Doppler centroid for BFSAR. It estimates Doppler centroid by searching for the range migration slope based on the minimum waveform entropy. Simulation results validate the effectiveness of this method.
Keywords :
Doppler radar; iterative methods; minimum entropy methods; synthetic aperture radar; time-domain analysis; Doppler centroid estimation; adaptive iterative scheme; azimuth time domain; bistatic forward-looking SAR; minimum waveform entropy; range migration characteristics; synthetic aperture radar; Azimuth; Doppler radar; Entropy; Geometry; Layout; Radar imaging; Radar theory; 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.2010.5494613
