Title :
Maximum likelihood array SAR interferometry
Author :
Lombardini, Fabrizio ; Lombardo, Pierfrancesco
Author_Institution :
Dept. IE, Pisa Univ., Italy
Abstract :
Conventional SAR interferometers derive the surface height from an estimate of the phase difference between the SAR processed echoes received by two displaced phase centers. This paper introduces a maximum likelihood algorithm to process the SAR data from an array of K phase centers. The accuracy of the new technique is derived and compared to the conventional one. It is shown that this new approach to SAR interferometry provides better accuracy, together with adaptivity to the look angle and reduced phase ambiguity
Keywords :
array signal processing; maximum likelihood estimation; phase estimation; radar imaging; radiowave interferometry; synthetic aperture radar; ISAR echo model; SAR images; SAR interferometers; SAR processed echoes; accuracy; displaced phase centers; look angle adaptivity; maximum likelihood algorithm; maximum likelihood array SAR interferometry; phase ambiguity; phase difference estimate; surface height; Antenna measurements; Decorrelation; Interferometers; Land surface; Maximum likelihood estimation; Phase estimation; Phased arrays; Pixel; Synthetic aperture radar; Synthetic aperture radar interferometry;
Conference_Titel :
Digital Signal Processing Workshop Proceedings, 1996., IEEE
Conference_Location :
Loen
Print_ISBN :
0-7803-3629-1
DOI :
10.1109/DSPWS.1996.555535
