Asymptotically Efficient Estimators for the K-Distribution

Conference: EUSAR 2010 - 8th European Conference on Synthetic Aperture Radar
06/07/2010 - 06/10/2010 at Aachen, Germany

Proceedings: EUSAR 2010

Pages: 4Language: englishTyp: PDF

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Maresch, Anika (Fraunhofer FHR, Wachtberg, Germany)

The K-distribution is an important probability distribution to describe the radar reflectivity of ground clutter in SAR images. One of the main tasks is to find reliable estimates of the two parameters that determine the K-distribution. Several moment estimators are described. The order of convergence of these estimators is Op(1/N(exp 1/2)). A possibility to calculate corrected estimator sequences which are asymptotically efficient is presented. Random fields with K-distributed marginals are simulated to compare the moment estimators with the pertinent corrected estimators.