Arrangement and method relating to analysis of transmission lines

US9009017B2 · kind B2 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Antoni Fertner · Stockholm, SE
• Fredrik Lindqvist · Järfälla, SE
• Ioanna Pappa · Stockholm, SE
• Klas Ericson · Ayacucho, PE
• Miguel Berg · Upplands Väsby, SE
• Per Ola Börjesson · Fontanafredda, IT
• Stefan Höst · Svedala, SE

Key dates

• Filing date: Jan 8, 2010
• Grant date: Apr 14, 2015
• Expiry date: Dec 7, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M3/26
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

Embodiments of the present invention relate to an arrangement for analyzing transmission line properties. Measurement data providing means provide data of a first frequency dependent line property, line property calculation arrangement with model handling means, a Hubert transform handler and line property determination means calculate said first property based on model parameters, line resistance at 0 frequency, roc, a cut-off frequency, v, a line capacitance C∞ and a line inductance L∞H. The line model handling means calculates the line inductance L(f) via a Hubert transform of a function of Q(f/v), wherein the function Q(f/v) relates the line resistance R(f) to roc as R(f)=roc·Q(f/v). The Hilbert transform values are calculated using a parameterized closed form expression for the Hubert transform or they are tabulated. The line property determination means calculates the first property and criteria function application means uses the measured first property and the calculated first property for model parameters to find optimized numerical model parameter values.