Patent ID: 8781078

Claim:
A method, in a processor, for generating an estimate of a transmission property of a telecommunications transmission line, the method comprising: obtaining estimates of the complex line impedance, Z in , for at least a first set of angular frequencies Ω; obtaining an estimate of the line capacitance, Ĉ; generating a Γ solution set by obtaining an estimate of Γ for each member of a subset of the first set of angular frequencies Ω; executing, a plurality of times, the steps of: adapting at least one curve to the Γ solution set; generating a further solution for Γ by solving numerically for Γ the relationship Z in ·jΩĈ=Γcoth(Γ) for a further angular frequency from the first set, using a starting point selected in dependence of said at least one curve and in dependence of a first member of the Γ solution set for which the corresponding angular frequency is close to the further angular frequency; adding the further solution for Γ to the Γ solution set; until the solution set comprises estimates of Γ for all the members of the first set of angular frequencies Ω; and generating an estimate of the transmission property in dependence of all or part of the Γ solution set.