Method for determining a periodic pattern in a line spectrum

Details Method for determining a periodic pattern in a line spectrum Method for determining a periodic pattern in a line spectrum

1994-05-26

1995-07-25

Ramirez, Ellis B.

Boots, shoes, and leggings

395900, G01R 2316, G01R 2300

Patent

active

054368472

ABSTRACT:
The invention relates to a method for determining a periodic pattern in an amplitude spectrum, for example, in a Doppler spectrum of a radar echo. A residual spectrum is formed using Fuzzy Set Theory, and the periodic pattern is determined for each residual spectrum by histogramming the original spectrum. The method can be used for identifying aircraft, for example helicopters, that have periodically-moving components, e.g., rotors, that generate a periodic pattern in a Doppler spectrum.

REFERENCES:
patent: 4084245 (1978-04-01), Bunge
patent: 4344031 (1982-08-01), Kuhn et al.
patent: 4453550 (1984-01-01), Flax
patent: 4782284 (1988-11-01), Adams et al.
patent: 4817158 (1989-03-01), Picheny
patent: 5177691 (1993-01-01), Welles et al.
patent: 5189727 (1993-02-01), Guerreri
patent: 5245445 (1993-09-01), Fujisawa
Ariyoshi et al., "Speech Recognition Processors Using Fuzzy Pattern Matching", 1988.
Li et al., "Spectral Histogram and Its Applications to Flaw Detection," 1988.
Elektronik Journal, Apr., 1993, pp. 14-18, 23; "Formalisiertes Ingenieurgefuhl", Maier, et al.

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