Method and apparatus for compensating for an echo signal component in telecommunication systems
US6956944B1 · kind B1 · utility
7Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1999 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Dec 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/23
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A balanced hybrid circuit for compensating for transmission echo signal in a modem. The hybrid circuit includes transmission echo compensation circuits that approximate the echo signal effects of the line and line transformer, respectively, and produce a transmission echo signal replica. A sample of the transmission signal and the replica of the transmission echo are then subtracted from the signal received on the line to produce a received signal isolated from the transmission signal and the transmission echo signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.