Method and apparatus for non-linear decision-feedback...

Details Method and apparatus for non-linear decision-feedback... Method and apparatus for non-linear decision-feedback...

2006-09-29

2009-10-20

Odom, Curtis B (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S229000, C375S232000

Reexamination Certificate

active

07606302

ABSTRACT:
Methods and apparatus are provided for determining the threshold position of one or more latches employed for decision-feedback equalization in the presence of a non-linear channel. A latch employed by a decision-feedback equalizer is positioned by constraining input data such that the input data only contains transitions from a first binary value; obtaining a plurality of samples of a single-sided data eye associated with the constrained input data; determining a threshold position of the latch based on the samples; and transforming the determined position to address the non-linearity of the channel. For example, a non-linear mapping table can map measured threshold values to transformed threshold values based on distance.

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patent: 1 750 380 (2007-02-01), None

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