The paper addresses the problem of finding an optimal estimation of the Doppler centroid for Synthetic Aperture Radar (SAR) data. The original idea is to exploit a bandwidth much wider than the PRF, say 3-5 times, by selecting non-aliased point targets. Non-aliased band of natural and isolated targets with close-to-ideal features is evidenced by spotlight processing of strip map acquisitions and accurate Doppler centroid is estimated by means of a joint Maximum Likelihood (ML) estimator. Lower bound of the estimate is determined and results on both simulated and real X-band SAR data are shown.
Autori: | |
Titolo: | Accurate optimal doppler centroid estimation for SAR data |
Data di pubblicazione: | 2011 |
Nome del convegno: | IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2011 |
ISBN: | 978-1-4577-1004-9 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1109/IGARSS.2011.6049709 |
Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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