Method, device, DSP and modem for efficient echo canceler phase roll tracking
US5625646A · kind A · utility
10Cited by
5References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1995 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Jun 26, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/232
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides a novel method, device, digital signal processor and modem for efficiently determining and tracking a phase roll of a far end echo by utilizing a novel phase error generator and a novel, efficient replica generator. The efficient replica generator utilizes a uniquely positioned phase rotator to facilitate replication of the far end echo. A unique combination of a Hilbert phase splitter and a conjugate Hilbert phase splitter together with a rectangular to polar converter enable the novel phase error generator to provide a reliable phase error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.