Process and circuit to determine estimates of the instantaneous value of parameters of at least one sinusoidal signal with constant and known frequency which is an additive component of a measuring signal
US5249150A · kind A · utility
29Cited by
8References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 30, 1991 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Apr 30, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/2506
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit and method for iteratively estimating Fourier coefficients of one or more Fourier components of a measuring signal utilizes a filter to determine the Fourier coefficients for sampling time k-1. The coefficients are utilized to obtain an estimate of the measuring signal at sampling time k. A subtractor circuit subtracts an actual sample of the measuring signal at sampling time k from the estimate of the measuring signal at sampling time k to obtain a difference signal. The difference signal is inputted back into the filter to determine an estimate of the Fourier coefficients at sampling time k.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.