Patent ID: 7801208
Filing Date: 2010-09-21
Classification: H04L

Abstract:
1. A method for adjusting a signal, comprising: applying at least one of a loss compensation for frequency-dependent distortion and an offset compensation for direct current (DC)-offset distortion to a data signal using an equalizer before or after the distortion occurs to generate an output signal, the data signal comprising even data and odd data; using a clock signal, sampling the output signal at a sampler to generate a plurality of data values and an error value, each data value comprising either a high value or a low value based on the sampling of the output signal, the error value indicating residue of the distortion based on the sampling of the output signal; monitoring the output signal using a controller for a pattern of data values corresponding to one or more filter patterns, the filter patterns each comprising a pattern of data values pre-determined to occur substantially equally in the data beginning with even data and in the data beginning with odd data of the data signal; detecting a pattern of data values in the output signal matching one of the filter patterns using the controller; and using the controller, adjusting at least one of the loss compensation and the offset compensation applied to the data signal based on the error value.