Patent · US Active

Single ended estimation of far-end crosstalk in a digital subscriber line

US8731185B2 · kind B2 · utility

0Cited by

6References

21Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Miguel Berg · Upplands Väsby, SE
Daniel Cederholm · Stockholm, SE

Key dates

Filing date	Dec 17, 2009
Grant date	May 20, 2014
Priority date	—
Expiry date	Dec 17, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04B3/487
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

An apparatus for estimating far-end crosstalk RDS-FEXT, i (fd) or an end (C1-2) of a communication line (C1) furthest from a transceiver (10-1) to which the communication line (C1) is connected. The apparatus is configured to: measure upstream noise RUS-Noise(fu) at an upstream frequency (fu), the upstream noise RUS-Noise(fu) induced in the communication line (C1) due to the crosstalk; select a downstream frequency (fd) for which the far-end crosstalk RDS-FEXT, i (fd) is to determined; and estimate the far-end crosstalk RDS-FEXT, i (fd)′ as a function of the upstream Noise RUS-Noise(fu), the upstream frequency (fu) and the downstream frequency (fd). An apparatus reversing upstream and downstream features, a system, a computer readable medium and related methods are also described.

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