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.
|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|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1109/IGARSS.2011.6049709|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|