Patent ID: 8194807

Claim:
A method, performed by a discriminator or a receiver, for discriminating a real echo peak from an aliased echo peak created by aliasing phenomenon in an estimated channel impulse response of a telecommunication channel, the method comprising steps of: a) sampling a received analogic signal for obtaining digital data corresponding to the received analogic signal, b) estimating the channel impulse response over a temporal window of size T IFFT from only a part of the digital data so that aliased echo peaks may appear in the estimated channel impulse response, c) computing a correlation between N samples of the digital data and a copy of the same N samples delayed by a time delay Δ 1,0 to obtain a first correlation result, time delay Δ 1,0 being equal to a time interval T between a first and a second distinct power peaks of the estimated channel impulse response, the first peak being the highest power peak within the temporal window, and/or d) computing a correlation between the N samples and a copy of the same N samples delayed by a time delay T IFFT -Δ 1,0 to obtain a second correlation result, and e) deciding whether the second peak is a real echo peak or an aliased echo peak based on the first and/or second correlation results.