Decision feedback equalizer using decisions from long and...

H - Electricity – 04 – L

Patent

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H04L 25/03 (2006.01) H04L 1/00 (2006.01)

Patent

CA 2565150

A decision feedback equalizer is operated by making first symbol decisions from an output of the decision feedback equalizer such that the first symbol decisions are characterized by a relatively long processing delay, by making second symbol decisions from the output of the decision feedback equalizer such that the second symbol decisions are characterized by a relatively short processing delay, and by determining tap weights for the decision feedback equalizer based on the first and second symbol decisions. The first symbol decisions may be derived from the output of a long traceback trellis decoder. The second symbol decisions may be derived either from the output of a short traceback trellis decoder or from shorter delay outputs of the long traceback trellis decoder.

Un Egaliseur A décision rétroactive est actionnE en prenant les premiEres dEcisions de symbole provenant d'une sortie de l'Egaliseur A dEcision rétroactive, de sorte que les premiEres dEcisions de symbole soient caractErisEes par un retard de traitement relativement long, en prenant les deuxiEmes dEcisions de symbole provenant d'une sortie de l'Egaliseur dEcision rétroactive, de sorte que les deuxiEmes dEcisions de symbole soient caractErisEes par un retard de traitement relativement court, et en dEterminant les coefficients de pôle pour l'Egaliseur A décision rétroactive, en fonction des premiEres et deuxiEmes dEcisions de symbole. Les premiEres dEcisions de symbole peuvent Etre dErivEes de la sortie d'un dEcodeur long en treillis traceback. Les deuxiEmes dEcisions de symbole peuvent Etre dErivEes, soit de la sortie d'un dEcodeur court en treillis traceback, soit de sorties à retard plus court du dEcodeur long en treillis traceback.

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