Patent · US Active

Calibration of a line driving device

US8681945B2 · kind B2 · utility

0Cited by

1References

20Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Klas Ericson · Ayacucho, PE
Antoni Fertner · Stockholm, SE
Fredrik Lindqvist · Järfälla, SE
Henrik Almeida · Stuvsta-Snättringe, SE
Miguel Berg · Upplands Väsby, SE
Per Ola Börjesson · Fontanafredda, IT

Key dates

Filing date	Dec 22, 2011
Grant date	Mar 25, 2014
Priority date	—
Expiry date	Dec 22, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04M11/062
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Method, arrangement and devices for calibration of a line driving device, such as a DSLAM, having a line port. The method comprises deriving of a first parameter vector, PVinf, for example Hinf. The parameter vector PVinf is derived by performing, at a first site, an echo measurement on the line driving device while the line port on said line driving device is open. The method further comprises calibrating the line driving device based on the first parameter vector PVinf and a second parameter vector PVref, which second parameter vector is based on information on echo measurements performed on at least one reference line driving device.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.