Time-domain equalizer of cascaded filters for VDSL
US6687291B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2000 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Feb 4, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03178
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method for designing TEQs(Time-domain Equalizers) for different signal bands in a VDSL transmission system, including the steps of dividing an entire signal band into at least two signal bands, and respectively modulating the divided signal bands before transmission at a transmitter, and applying respective transmitted signal bands to an algorithm that can reduce channel response lengths of the respective signal bands at a receiver, for obtaining respective TEQs, and connecting the TEQs in series, wherein an entire signal band is divided into a low frequency signal band and a high frequency signal band, with the low frequency signal band allocated smaller than the high frequency signal band, and preferably the low frequency signal band includes the signal band used in an ADSL, whereby reducing an amount of hardware and assuring an interchangeability with the ADSL transmission system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.