John Davidsen resumes & CV records
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John H Davidsen, 9755 Seaview St, East Massapequa, NY 11758
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55 Seaview St, Massapequa, NY 11758 516-5412809
3807 Atlantic Ave, Daytona Beach, FL 32118
Daytona Beach Shores, FL
55 Seaview St, Massapequa, NY 11758
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Us Patents
Apparatus And Method For Estimating Weather Spectral Moments
US Patent:
5394155, Feb 28, 1995
Filed:
Aug 16, 1993
Appl. No.:
8/065971
Inventors:
William L. Rubin - Whitestone NY
John W. Davidsen - Massapequa NY
John W. Davidsen - Massapequa NY
Assignee:
Unisys Corporation - Blue Bell PA
International Classification:
G01S 1395
US Classification:
342192
Abstract:
A spectral moment estimator includes a first processor which processes signals representative of the magnitudes of complex autocorrelation functions of a signal at a plurality lags and provides Doppler spectral width representative signals and the autocorrelation function at zero lag independent of noise. A second processor, processes the complex autocorrelation representative signals, the complex autocorrelation functions phase angles representative signals, and the Doppler spectral width representative signals to provide the mean Doppler frequency of the the signal. The autocorrelation function phase angles are disambiguated and the unambiguous phase angles are least mean square error fitted to a third order odd polynomial, the linear term of which is the mean Doppler frequency of the signal.
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