Use of a fractionally spaced equalizer to perform echo cancellation in a full-duplex modem
US5163044A · kind A · utility
44Cited by
5References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1991 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Jan 2, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03044
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A new receiver structure is disclosed for a full-duplex modem in which a fractionally spaced equalizer, which is normally present to mitigate the effects of linear impairments present on a communication channel, also performs echo cancellation. Specifically, an additional echo signal is formed in the full-duplex modem and added to a received signal, which includes an echo signal, thereby forming a composite signal. This composite signal is then applied to the fractionally spaced equalizer for equalization, which mitigates the echo signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.