Patent ID: 6704369
Filing Date: 2004-03-09
Classification: G06K,G10L,H03H

Abstract:
In a signal transmission/reception system in which first and second signals originating in signal sources of two systems are transmitted to a receiver equipment provided with two input facilities, said first and second signals undergoing mutual interference due to crosstalk in their course of being transmitted through transmission channels section and being inputted to the respective input facilities of said receiver equipment,said receiver equipment comprises a signal separation apparatus comprising a signal separation section and an evaluation function calculating section, wherein said signal separation section comprises: first and second filter means each of a variable tap coefficient type for performing filtering processing on a first input signal; third and fourth filter means each of a variable tap coefficient type for performing filtering processing on a second input signal; first difference calculation means for determining arithmetically difference between outputs of said first and third filter means; second difference calculation means for determining arithmetically difference between outputs of said second and fourth filter means; fifth filter means of a variable tap coefficient type for performing filtering processing on an output signal of said first difference calculation means; and sixth filter means of a variable tap coefficient type for performing filtering processing on an output signal of said second difference calculation means; and wherein said evaluation function calculation section comprises: first autocorrelation calculation means for determining arithmetically an inverse sign value of autocorrelation of an output signal of said fifth filter means; second autocorrelation calculation means for determining arithmetically an inverse sign value of autocorrelation of an output signal of said sixth filter means; addition means for adding together output values of said first and second autocorrelation calculation means; absolute-value calculation means for determining an absolute value of an added output value of said addition means; square calculation means for determining arithmetically a squared value of an absolute value outputted from said absolute value calculation means; and minimum value decision means for determining characteristics values of said transmission channels to obtain a minimum value from evaluation function values output from the square calculation means wherein the evaluation function values are determined arithmetically with respect to optional characteristics values of said transmission channels.