Joint reduction of NEXT and FEXT in xDSL systems
US7394752B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 31, 2002 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Dec 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/023
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods, apparatus, techniques and computer program products for joint reduction of crosstalk in a synchronized, time division duplexed DSL systems use sequential removal of NEXT interference followed by removal of FEXT interference from a received DSL signal. Crosstalk is removed from a primary signal in a synchronized TDD DSL system having a primary channel that carries the primary signal, at least one NEXT generating channel that generates NEXT interference in the primary signal and at least one FEXT generating channel that generates FEXT interference in the primary signal. Signal data is acquired, where the signal data includes received signal data for the primary channel and at least one FEXT generating channel, transmitted signal data for at least one NEXT generating channel, and channel data comprising channel transfer function data and crosstalk coupling coefficient data for the primary channel, each NEXT generating channel and each FEXT generating channel. After the signal data is acquired, NEXT interference in the primary signal is then removed using the transmitted signal data and the channel data, followed by removal of FEXT interference in the primary signal using vect…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.