System for measuring the period of a quasi-periodic signal
US5584295A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Sep 1, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.