The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2014
Filed:
Dec. 22, 2011
Klas Ericson, Alvsjo, SE;
Antoni Fertner, Stockholm, SE;
Fredrik Lindqvist, Jarfalla, SE;
Henrik Almeida, Hagersten, SE;
Miguel Berg, Upplands Vasby, SE;
Per Ola Borjesson, Lund, SE;
Klas Ericson, Alvsjo, SE;
Antoni Fertner, Stockholm, SE;
Fredrik Lindqvist, Jarfalla, SE;
Henrik Almeida, Hagersten, SE;
Miguel Berg, Upplands Vasby, SE;
Per Ola Borjesson, Lund, SE;
Telefonaktiebolaget LM Ericsson (Publ), Stockholm, SE;
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.