Title :
An optimization modal for spectral shift estimation
Author :
Li, Wen-Ping ; Wang, Zheng-ming
Author_Institution :
Dept. of Math. & Syst. Sci., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
Multiple SAR images of the same area from slightly different slant angles show relative spectral shifts, which is used to improve the slant range resolution by combining their spectra. In the paper, an optimization modal, which maximizes the combined image´s amplitude, is proposed to estimate the spectral shift. Simulated data show that the proposed estimation method is more precise than the interferometric method if the two images satisfy the coherence to some extent.
Keywords :
optimisation; radar imaging; radar resolution; synthetic aperture radar; optimization modal; radar interferometry; slant range resolution; spectral shift estimation; synthetic aperture radar imaging; Amplitude estimation; Bandwidth; Coherence; Entropy; Estimation error; Image quality; Image resolution; Interferometry; Mathematics; Reflectivity; Optimization Modal; SAR; Slant Angle; Spectral Shift;
Conference_Titel :
Synthetic Aperture Radar, 2009. APSAR 2009. 2nd Asian-Pacific Conference on
Conference_Location :
Xian, Shanxi
Print_ISBN :
978-1-4244-2731-4
Electronic_ISBN :
978-1-4244-2732-1
DOI :
10.1109/APSAR.2009.5374311
