Title :
Optimal block quantization for SAR data
Author :
Guccione, Pietro ; Cafforio, Ciro ; Guarnieri, Andrea Monti
Author_Institution :
Dipt. di Elettrotec. ed Elettron., Politec. di Bari, Bari, Italy
Abstract :
A variable bit rate coding scheme designed for new generation SAR satellites is presented. This coding is based on previous schemes of Block Adaptive Quantizer (BAQ) and is intended as a possible improvement over Sentinel-1 FDBAQ. In this project, the number of quantizers is considered a design choice and the optimization is carried out looking for a set of reflectivity classes in which partition all the imaged areas on the Earth. Superior performances to those envisaged for Sentinel-1 FDBAQ are obtained in terms of SNR vs. average rate. Results come from simulations based on a 16-bit mosaic of C band reflectivity obtained by ESRIN from ENVISAT GM data and Wien University database of ENVISAT WSM radar reflectivity.
Keywords :
optimisation; quantisation (signal); radar imaging; synthetic aperture radar; ENVISAT GM data; ENVISAT WSM radar reflectivity; SAR data; SAR satellites; SNR; Sentinel-1 FDBAQ; Wien University database; bit rate coding scheme; block adaptive quantizer; earth images; optimal block quantization; optimization; Bit rate; Channel capacity; Design optimization; Image quality; Phase noise; Quantization; Reflectivity; Satellites; Signal to noise ratio; Statistics;
Conference_Titel :
Radar Conference, 2010 IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-5811-0
DOI :
10.1109/RADAR.2010.5494597
