Dual adaptive filter apparatus and method
US7480377B2 · kind B2 · utility
3Cited by
6References
27Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 31, 2003 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Apr 5, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for adapting dual filters is disclosed. In one aspect, a method may include transforming a signal, adapting a first adaptive filter based on the transformed signal, estimating a delay of an impulse response based on the adaptation of the first filter, delaying a signal based on the estimated delay, and adapting a second adaptive filter based on the delayed signal. In one aspect, an echo or other unwanted signal may be reduced or cancelled based on the adaptation of the second filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.