Filters for canceling multiple noise sources in borehole electromagnetic telemetry system
US6781521B1 · kind B1 · utility
22Cited by
31References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2001 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Nov 20, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B13/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electromagnetic borehole telemetry system providing improved signal to noise ratio. Adaptive filters use noise channels as references to remove noise from the signal channel. Multiple noise channels are coupled to series connected adaptive filters for removing each noise source from the signal channel. The order of noise removal is selected to remove the most significant first.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.