15 November 1993 Wigner distribution in the Doppler rate estimation of SAR signals
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Abstract
Synthetic Aperture Radar's data are today widely used in Remote Sensing applications, in order to obtain high resolution ground images. For this purpose a good estimation of Doppler parameters is required. The focusing quality of the final image will depend mainly on the update rate and accuracy of Doppler rate estimations obtained directly from sensor's raw-data. Although the autofocus algorithm normally used has not theoretical limitations, from a practical point of view it works well only under appropriate conditions. In this paper an alternative technique will be proposed, based on the Wigner distribution analysis of sensor's data; results about its application to simulated and real signals will also be reported.
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Nicola Veneziani, R. Albrizio, Francesco Posa, R. Sergi, "Wigner distribution in the Doppler rate estimation of SAR signals", Proc. SPIE 1938, Recent Advances in Sensors, Radiometric Calibration, and Processing of Remotely Sensed Data, (15 November 1993); doi: 10.1117/12.161544; https://doi.org/10.1117/12.161544
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KEYWORDS
Doppler effect

Synthetic aperture radar

Sensors

Antennas

Aluminum

Chromium

Image quality

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