Adaptive analog echo/NEXT cancellation
US8203975B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Apr 19, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/23
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transceiver includes an analog front end (AFE) device and first, second, third, and fourth transmitters. A digital signal processor (DSP) receives digital receive signal and digital transmit signals and generates a shared error control signal and first, second, third, and fourth individual error control signals. An echo canceller system generates an estimated echo signal. First, second, and third NEXT canceller systems generate first, second, and third estimated NEXT signals, respectively, each based on the second analog receive signal and respective ones of the analog transmit signals from the second, third, and fourth transmitters during the first mode and each based on the shared error control signal, respective ones of the second, third, and fourth individual error control signals, and the respective ones of the analog transmit signals from the second, third, and fourth transmitters during the second mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.