System for measuring the period of a quasi-periodic signal

Details System for measuring the period of a quasi-periodic signal System for measuring the period of a quasi-periodic signal

1995-09-01

1996-12-17

Manuel, George

Surgery

Truss

Pad

A61B 800

Patent

active

055842950

ABSTRACT:
The disclosed system for measuring the periodic content of an input signal includes an autocorrelation function generator for generating a sequence of autocorrelation functions. Each of the autocorrelation functions is representative of an autocorrelation function of a portion of the input signal. The system further includes a temporal filter for filtering the autocorrelation functions and thereby generating a lag histogram.
In other forms the system may comprise a fetal heart rate monitor for measuring the heart rate of a fetus in vivo. The monitor generates a lag histogram and uses the lag histogram for stabilizing the determination of the fetal heart rate.

REFERENCES:
patent: 4453550 (1984-06-01), Flax

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