Method and apparatus for determining one or more channel compensation parameters based on data eye monitoring

摘要

Methods and apparatus are provided for determining one or more channel compensation parameters based on data eye monitoring. According to one aspect of the invention, a method is provided for evaluating the quality of a data eye associated with a signal. The received signal is sampled for a plurality of different phases, for example, using at least two latches, and the samples are evaluated to identify when the signal crosses a predefined amplitude value, such as a zero crossing. It is determined whether the points of predefined amplitude crossing satisfy one or more predefined criteria. One or more parameters of one or more channel compensation techniques can optionally be adjusted based on a result of the determining step. One or more parameters of an adjacent transmitter can also be adjusted to reduce near end cross talk based on a result of the determining step.

主权项

1. A method for evaluating the quality of a data eye associated with a signal, comprising:
sampling said received signal for a plurality of different phases, wherein a first phase samples said received signal substantially in a middle of said data eye; creating a data crossing histogram at a data transition phase based on said samples and said plurality of different phases; determining a duration of said data crossing histogram; and adjusting one or more equalization parameters using one or more channel compensation techniques to reduce said duration of said data crossing histogram if said data crossing histogram duration does not satisfy a predefined threshold indicating a maximum allowable data crossing histogram duration.