Method for estimating and synchronizing frame boundaries of mis-aligned cross-talk signals in a DMT system
US6993068B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 11, 2000 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | May 24, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2678
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a telecommunications transmission system using a DTM system as a multicarrier system and having at least two VDSL systems, each including a pair of modems, the at least two VDSL systems belonging to a single binder group common to both VDSL systems, a method in the DMT system for keeping DMT frames aligned to the same frame timing includes estimating the time mis-alignment and power of cross-talk DMT signals added to a received DMT signal when the estimate is used by the modem to synchronize its own frame timing to a main cross-talkers frame timing, using auto-correlation on the received signal and a delayed copy of the received signal, and detecting correlation maxima that determine the frame boundaries of different DMT components of the received signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.