Group delay based averaging
US10345339B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2016 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Aug 17, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/31709
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments of the present invention provide techniques and methods for improving signal-to-noise ratio (SNR) when averaging two or more data signals by finding a group delay between the signals and using it to calculate an averaged result. In one embodiment, a direct average of the signals is computed and phases are found for the direct average and each of the data signals. Phase differences are found between each signal and the direct average. The phase differences are then used to compensate the signals. Averaging the compensated signals provides a more accurate result than conventional averaging techniques. The disclosed techniques can be used for improving instrument accuracy while minimizing effects such as higher-frequency attenuation. For example, in one embodiment, the disclosed techniques may enable a real-time oscilloscope to take more accurate S parameter measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.