Echo cancellation in two-wire, two-way data transmission systems
US4131767A · kind A · utility
126Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1978 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Feb 22, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/23
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An adaptive echo canceller for two-wire, simultaneous two-way data communication at full bandwidth uses Nyquist-interval, rather than baud-interval, processing to achieve independence from timing discrepancies between near-end and far-end terminals. The entire echo signal, and not merely baud-interval samples thereof, is suppressed. The echo canceller is preferably a transversal structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.