Autocorrelation apparatus and method for approximating the occurrence of a generally periodic but unknown signal
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United States of America Patent
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Sep 6, 1983
Issued Date -
N/A
app pub date -
Mar 18, 1982
filing date -
Apr 28, 1978
priority date (Note) -
Expired
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Abstract
A method and an apparatus for indicating in real time the occurrence of and measuring the frequency or period of the basic oscillation of a generally periodic unknown signal with statistically distributed spectral components is disclosed. Using an autocorrelation technique, the time interval from the initial peak value to the next successive peak value of the autocorrelation curve is measured and the unknown frequency or period is determined therefrom. A periodically occurring maximum of the next successive peak value is determined, and, on its appearance, a signal is produced, said signal approximating the occurrence in real time of the generally periodic signal.
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