Adaptive filter utilizing proportional affine projection algorithm
US6744886B1 · kind B1 · utility
15Cited by
9References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 6, 1999 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Jan 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2021/0063
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An adaptive filter suitable for network echo cancellation and other applications contains a coefficient vector update device for feeding coefficient vector updates to a finite impulse response filter in accordance with fast converging algorithms. A double talk detector is included for causing filter adaptation to cease in the presence of double talk in the system being echo cancelled. The coefficient vector update device utilizes a proportional affine projection algorithm to provide fast convergence of the filter system and improved performance over other filter devices utilizing different fast converging algorithms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.