Narrowband interference canceller for wideband communication systems
US6976044B1 · kind B1 · utility
166Cited by
4References
56Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Jun 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for adaptively removing interference from a signal. In one embodiment, the invention comprises an infinite impulse response (IIR) notch filter configured to receive a wideband signal and provide a filtered output signal, and a controller coupled to the notch filter to adaptively control the null frequency of the notch filter thereby removing narrowband interference from the received wideband signal. The controller may employ a gradient-based algorithm to detect the highest power frequency band in the output signal and modify the null frequency of the notch filter to minimize the power of the output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.