Spurious noise filter
US6453272B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
According to the principles of the invention, there is provided a system that identifies spurious noise values in an input signal and replaces them with substitute values representative of the spurious-noise-free signal. The system is activated when the signal deviation exceeds a predetermined threshold, otherwise passing the signal unchanged. The substituted representative values are determined based on historical signal data, preferably a moving average with a fixed window. There is further provided a maximum glitch width which prevents inadvertent suppression of a true step in the input signal, and a relaxation time which prevents consecutive filter activations from unduly masking the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.