Joint adaptive echo canceller and equalizer for two-wire full-duplex data transmission
US4074086A · kind A · utility
43Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Sep 7, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/1423
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An adaptive equalizer and echo canceller jointly respond to a common error difference between the actual output and the quantized digital output of a data receiver in a two-wire digital data transmission system to achieve simultaneous full-bandwith full-duplex operation. Two-wire transmission channels are typically terminated in hybrid balancing networks which because of their fixed impedances permit "echoes" of the transmitted signal to interfere with reception of the much weaker incoming signal. Both the equalizer and canceller are adaptively adjustable transversal structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.