Recovery of high speed, high bit error rate data
OwnerYufeng Xuinventor
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Abstract
A binary data signal of a very high speed rate travelling over a transport network is regenerated using two threshold levels. The first threshold, or the preset threshold is initially set by the performance monitor, and thereafter adjusted based on the current quality of the signal eye. The second threshold, or the decision threshold, is determined by the performance monitor based on the preset threshold and on the provisioned BER.
Claims4
A device for determining an optimized decision threshold for a high speed, high rate data regenerator, comprising:
- a first comparator and a first retiming circuit for comparing a recovered data signal with a preset threshold and providing a pseudo-data signal representative of said recovered data signal;
- a second comparator and a second retiming circuit for comparing said recovered data signal with said optimized decision threshold and providing a regenerated data signal;
- and
- a low pass filter for separating a DC component from said first signal and using said DC component to provide said optimized decision threshold.
A method for determining an optimized decision threshold for a high speed, high rate data regenerator, comprising:
- comparing and retiming a recovered data signal with a preset threshold, for providing a pseudo-data signal representative of said recovered data signal;
- comparing and retiming said recovered data signal with said optimized decision threshold for providing a regenerated data signal;
- filtering said pseudo-data signal for separating a DC component;
- and
- monitoring said DC component to provide said optimized decision threshold.
Dependencies are inferred from the claim text.