Boots – shoes – and leggings
Patent
1977-02-22
1978-07-04
Gruber, Felix D.
Boots, shoes, and leggings
343 8, 343100CL, 364565, G06G 900, G01S 1100
Patent
active
040992497
ABSTRACT:
A method and apparatus for determining the value of a Doppler frequency shift component .DELTA.f present in a signal f .+-. .DELTA.f employing a correlation process which utilizes the Mellin transform and is scale invariant. The location of the correlation peak in the reference coordinate system used provides a measure of the magnitude of .DELTA.f. The sequence of steps involved in the correlation process when optical apparatus is used include forming a transmittance pattern of the signal f .+-. .DELTA.f, which has a horizontal scale that is the natural log of the time scale of the original signal, forming a similarly scaled transmittance pattern of the reference signal, f, and utilizing the first patttern in the input plane of a frequency plane correlator that has a holographic matched spatial filter that is produced from the second pattern and contains a term corresponding to the conjugate of the Mellin transform of the reference signal in its frequency plane.
REFERENCES:
patent: 3732565 (1973-02-01), Symaniec et al.
patent: 3887923 (1975-06-01), Hendrix
Beard: Imaging by Correlation of Intensity Fluctuations, Applied Physics ters 10-1-69, vol. 15, No. 7.
Casasent et al.: New Optical Transforms for Pattern Recognition, Proceedings IEEE, vol. 65, No. 1, Jan. 1977, pp. 77-84.
Gruber Felix D.
Sciascia R. S.
Shrago L. I.
The United States of America as represented by the Secretary of
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