Optimum phase searching system and method thereof in ethernet physical layer
AssigneeALi Corporation
InventorRong-yun Li
Life of this patent
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Abstract
A system for optimum phase searching in an Ethernet physical layer includes a time recovering circuit and an equalizer. The time recovering circuit includes a loop filter and a time error detector, and the equalizer includes a feed forward equalizer, a slicer and a feed backward equalizer. An optimum phase searching method includes obtaining optimum phases when mean squared errors calculated by the slicer are less than a first threshold, absolute values of mean values of outputs calculated by a time error detector are less than a second threshold, and the outputs are monotonic.
Claims11
A method of searching an optimum phase from an Ethernet physical layer, comprising:
- resetting a coefficient of an equalizer based on a predetermined value, wherein the equalizer includes a slicer;
- determining whether the coefficient converges to a stable state;
- and
- obtaining at least one optimum phase when mean squared errors of inputs and outputs of the slicer calculated by the slicer are less than a first threshold, absolute values of mean values of outputs of a time error detector calculated by the time error detector are less than a second threshold, and the outputs are monotonic.
An optimum phase searching system for an Ethernet physical layer, comprising:
- a timing recovery circuit including a time error detector;
- and
- an optimum phase searching circuit configured to obtain optimum phases when mean squared errors calculated by a slicer of an equalizer are less than a first threshold, absolute values of mean values of outputs calculated by the time error detector are less than a second threshold, the outputs are monotonic.
Dependencies are inferred from the claim text.