Lucent Technologies Inc.

Christoph Schulien

Herbert Haunstein

Konrad Sticht

Ralf Dohmen

Claus Dorschky

Matthias Berger

Frank Kunz

Achim Herzberger

Georg Roell

A method of adjusting equalization parameters in a receiver wherein a bit error rate (BER) in a data stream is measured from the number of corrected bits in data blocks which have an information section and an error correction section. A predetermined equalization parameter is changed, and the bit error rate (BER) after change is again measured to find out how to change the predetermined equalization parameter until an optimum is reached. When adjusting the threshold value of the receiver, the history of occurring bits preceding the actual sampled bit is taken into consideration in that the amount and direction of adjustment is derived from a look-up table.

Adjustment for equalization parameters in receivers

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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Munich, Georgia

Christoph Schulien