Communications: directive radio wave systems and devices (e.g. – With particular circuit – Spectrum analysis
Patent
1993-08-16
1995-02-28
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Spectrum analysis
342 26, G01S 1395
Patent
active
053941551
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.
REFERENCES:
patent: 3340528 (1967-09-01), Atlas
patent: 5027122 (1991-06-01), Wieler
patent: 5093662 (1992-03-01), Weber
patent: 5122805 (1992-06-01), Peterman et al.
patent: 5130712 (1992-07-01), Rubin et al.
Davidsen John W.
Rubin William L.
Barron Jr. Gilberto
Levine Seymour
Starr Mark T.
Unisys Corporation
Weinstein Stanton D.
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