System and method for determining signal-to-noise ratio (SNR), signal-to-noise and distortion ratio (SINAD) and total harmonic distortion (THD)
US7895006B2 · kind B2 · utility
4Cited by
2References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2007 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Feb 24, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R29/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for determining signal-to-noise ratio (SNR), signal-to-noise and distortion ratio (SINAD), and total harmonic distortion (THD), includes logic for estimating a frequency of a dominant sinusoidal signal present in a sampled data record, logic for iteratively fitting a curve, the curve including a fundamental sinusoid, harmonic components and a DC offset, and logic for computing SNR, SINAD and THD using the fundamental sinusoid, harmonic components and a DC offset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.