Equalizer with two paths

Details Equalizer with two paths Equalizer with two paths

H - Electricity

04

L

H04L 25/03 (2006.01)

Patent

CA 2384300

A dual path equalizer for processing blocks of data includes first and second pre-processors, first and second finite filters, first and second post- processors, and an adder. The first pre-processor applies coefficients b1 to a received signal, the first finite filter applies coefficients a1 to an output of the first pre-processor in order to substantially eliminate a ghost from the received signal, and the first post-processor applies coefficients c1 to an output of the first finite filter. The second pre-processor applies coefficients b2 to the received signal, the second finite filter applies coefficients a2 to an output of the second pre-processor in order to substantially eliminate a ghost from the received signal, and the second post- processor applies coefficients c2 to an output of the second finite filter. The coefficients b2 are substantially the time reverse of the coefficients b1, the coefficients a2 are substantially the time reverse of the coefficients a1, and the coefficients c2 are substantially the time reverse of the coefficients c1. The adder is arranged to add outputs from the first and second post- processors.

La présente invention concerne un égaliseur à deux voies destiné à traiter des blocs de données, qui comprend un premier et un second préprocesseur, un premier et un second filtre non récursif, un premier et un second postprocesseur, et un sommateur. Le premier préprocesseur applique des coefficients b¿1? à un signal reçu, le premier filtre non récursif applique des coefficients a¿1? à une sortie du premier préprocesseur afin d'éliminer sensiblement un écho du signal reçu, et le premier postprocesseur applique des coefficients c¿1? à une sortie du premier filtre non récursif.Le second préprocesseur applique des coefficients b¿2? au signal reçu, le second filtre non récursif applique des coefficients a¿2? à une sortie du second préprocesseur afin d'éliminer sensiblement un écho du signal reçu, et le second postprocesseur applique des coefficients c¿2? à une sortie du second filtre non récursif. Les coefficients b¿2? sont sensiblement égaux aux coefficients b¿1? inversés dans le temps, les coefficients a¿2? sont sensiblement égaux aux coefficients a¿1? inversés dans le temps, et les coefficients c¿2? sont sensiblement égaux aux coefficients c¿1? inversés dans le temps. Le sommateur est conçu pour faire la somme des sorties du premier et du second postprocesseur.

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