Method and apparatus for setting a step size for an adaptive filter coefficient of an echo canceller
US6707912B2 · kind B2 · utility
7Cited by
13References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2021/0078
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The step sizes for tap positions of an adaptive filter (124) in an echo canceller (125) for canceling an echo signal are individually selected based upon a profile of the echo environment. A training signal (112) is injected into the echo canceller and to the echo path during a training interval, or period. The adaptive filter profiles the echo path during the training interval. Respective step sizes &agr;[k] for the tap positions are generated as a function of the echo profile so generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.