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Proceedings Paper

Optimal Doppler centroid estimation for spaceborne SAR data from a nonhomogeneous scene
Author(s): Hong Xiong; Guoqing Liu; ShunJi Huang
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Paper Abstract

Doppler centroid is one of the most important parameters required by spaceborne SAR signal processing, it must be accurately estimated from echo signals themselves in order to perform a fine motion compensation. So far, the clutter-lock method proposed by Li et al. has been most commonly used to estimate this quantity, however, this method operates well only for homogeneous and quasi-homogeneous sources. In this paper, an optimal amplitude correlation approach is presented to estimate Doppler centroid for spaceborne SAR data from a non-homogeneous scene, it includes the following two steps, (1) coarse estimation: spatial amplitude correlation in range-dimension, (2) fine estimation: image amplitude correlation in range-dimension. The effectiveness of this optimal approach is demonstrated with processing spaceborne SEASAT-A SAR data. Compared with the most commonly used clutter-lock method, the improvement of estimation accuracy of non-homogeneous scene is obtained.

Paper Details

Date Published: 21 December 1994
PDF: 9 pages
Proc. SPIE 2316, SAR Data Processing for Remote Sensing, (21 December 1994); doi: 10.1117/12.197550
Show Author Affiliations
Hong Xiong, Univ. of Electronic Science and Technology of China (China)
Guoqing Liu, Univ. of Electronic Science and Technology of China (China)
ShunJi Huang, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 2316:
SAR Data Processing for Remote Sensing
Giorgio Franceschetti, Editor(s)

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