METHOD AND APPARATUS FOR NON-LINEAR DECISION-FEEDBACK EQUALIZATION IN THE PRESENCE OF ASYMMETRIC CHANNEL

摘要

Methods and apparatus are piovided 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 fiom 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.