Lucent Technologies Inc.

Frank Kunz

Herbert Haunstein

Konrad Sticht

Claus Dorschky

Matthias Berger

Christoph Schulien

Thomas Link

A decision feedback structure for recovering a bit stream out of received signals is disclosed, wherein the sampling instant may be tuned in dependence of the sequence or pattern of the preceding bits so as to follow the bit sequence dependent instant of the maximum eye opening. The decision-feedback equalizer structure includes decision means for making a bit value decision at a sampling instant, a feedback path to feed back bit values to said decision means and means for adapting the sampling instant for a bit value decision made by said decision means with respect to the sampling phase depending on the bit values of preceding bits, in particular depending on the bit value of the previous bit.

Decision feedback structure with selective sampling phase control

A method for correcting the phase of a clock in a data receiver which receives a data flow representing different signal levels with logical high and low signal values and signal transitions positioned therebetween, wherein the positions of such signal transitions between respective two adjacent logical signal values are evaluated for correcting the phase of the clock. The position of a signal transition between a first pair of signal values on one level () or a second pair of signal values on the other level () is weighted stronger in the evaluation then the positions of signal transitions between adjacent single signal values () of different signal levels.

Method and apparatus for correcting the phase of a clock in a data receiver

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Nuremberg, Germany

Frank Kunz