Communications: directive radio wave systems and devices (e.g. – Determining distance – Altimeter
Reexamination Certificate
2011-03-22
2011-03-22
Sotomayor, John B (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Altimeter
C342S099000, C342S091000, C342S094000
Reexamination Certificate
active
07911375
ABSTRACT:
Systems and methods for Doppler beam sharpening in a radar altimeter are provided. In one embodiment, a method comprises receiving a return signal at a radar altimeter receiver and applying a first gate to the return signal to select at least a first component of the return signal. Spectral analysis is performed on the first component of the return signal to generate a plurality of frequency bins, wherein each frequency bin is centered around a different frequency across a Doppler shift frequency spectrum for the first component of the return signal. The method further comprises tracking the first component of the return signal, selecting a first frequency bin of the plurality of frequency bins based on the Doppler shift frequency of the first component of the return signal, and outputting a portion of the first component of the return signal falling within the first frequency bin for further processing.
REFERENCES:
patent: 3334344 (1967-08-01), Colby, Jr.
patent: 5014063 (1991-05-01), Studenny
patent: 5150125 (1992-09-01), Hager
patent: 5736957 (1998-04-01), Raney
patent: 5831570 (1998-11-01), Ammar et al.
patent: 6188348 (2001-02-01), Raney
patent: 6897804 (2005-05-01), Hager et al.
patent: 6980153 (2005-12-01), Hager et al.
patent: 7218268 (2007-05-01), VandenBerg
patent: 7518547 (2009-04-01), Winstead
patent: 7652615 (2010-01-01), Thomas et al.
patent: 7714774 (2010-05-01), Winstead
patent: 2003/0214431 (2003-11-01), Hager et al.
patent: 2005/0253750 (2005-11-01), Hager et al.
patent: 2006/0049977 (2006-03-01), Vacanti
patent: 2007/0273572 (2007-11-01), Thomas et al.
patent: 2008/0169972 (2008-07-01), Greenwood et al.
patent: 2010/0225531 (2010-09-01), Johnson
patent: 2010/0302088 (2010-12-01), Winstead et al.
patent: 9814799 (1998-04-01), None
Raney, R.K.; Jensen, J.R.; Porter, D.L.; , “The delay-Doppler radar altimeter: robust and improved measurement capabilities,” Oceans 2003. Proceedings , vol. 3, No., pp. 1313-1316 vol. 3, Sep. 22-26, 2003.
Shum, C.K.; Abusali, P.A.M.; Chung-Yen Kuo; Hyongki Lee; Ogle, J.; Raney, R.K.; Ries, J.C.; Smith, W.H.F.; Svehla, D.; Changyin Zhao; , “Orbit Accuracy Requirement for Abyss: The Space Station Radar Altimeter to Map Global Bathymetry,” Geoscience and Remote Sensing Letters, IEEE , vol. 6, No. 4, pp. 653-657, Oct. 2009.
Skolnik, Merrill, “2.10 Clutter Filter Bank Design”, “Radar Handbook”, Jan. 22, 2008, pp. 2.52 thru 2.11, No. 3, Publisher: McGraw-Hill Professional.
European Patent Office, “European Search Report”, Aug. 19, 2010, Published in: EP.
Picardi et al., “Extensive Non-Coherent Averaging in Doppler Beam Sharpened Space-Borne Radar Altimeters”, “Geoscience and Remote Sensing Syposium Proceedings”, 1998, pp. 2643-2645, Publisher: IEEE.
Heidemann Thomas W.
Winstead Benjamin J.
Fogg & Powers LLC
Honeywell International , Inc.
Sotomayor John B
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