Title :
Multiresolution signal representation for phase unwrapping and interferometric SAR processing
Author :
Bamler, Richard ; Davidson, Gordon W.
Author_Institution :
German Aerosp. Res. Establ., Oberpfaffenhofen, Germany
Abstract :
Phase unwrapping requires-implicitly or explicitly-phase gradient estimates for phase reconstruction. An asymptotically unbiased local frequency estimator based on multiresolution signal representation is presented. The proposed estimator is able to automatically trade-off resolution against estimation error. It is shown that interferometric SAR processing can be improved by employing a smoothed version of the unwrapped phase. Particularly, a novel method for slope-adaptive spectral shift filtering is introduced
Keywords :
geodesy; geophysical signal processing; geophysical techniques; radar imaging; remote sensing by radar; signal representation; synthetic aperture radar; topography (Earth); INSAR; asymptotically unbiased local frequency estimator; geodesy; geophysical measurement technique; interferometric SAR; land surface topography; multiresolution signal representation; phase gradient estimate; phase reconstruction; phase unwrapping; radar imaging; radar remote sensing; slope-adaptive spectral shift filtering; synthetic aperture radar; terrain mapping; Autocorrelation; Decorrelation; Frequency estimation; Histograms; Phase estimation; Phase noise; Robustness; Signal representations; Signal resolution;
Conference_Titel :
Geoscience and Remote Sensing, 1997. IGARSS '97. Remote Sensing - A Scientific Vision for Sustainable Development., 1997 IEEE International
Print_ISBN :
0-7803-3836-7
DOI :
10.1109/IGARSS.1997.615281
