Rank-order equalization
AssigneeKandou Labs, S.A.
InventorsHarm Cronie, Klaas Hofstra, Amin Shokrollahi
Life of this patent
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Abstract
For digital data transmitted using a vector signaling encoding, a rank-order equalizer cancels various channel noise such as inter-symbol interference. Further, rank-order units may be cascaded to achieve improved equalization over successive sample vector signals in a rank-order equalizer. Multiple rank-order equalizers further operate in parallel in a feed forward mode or in series in a feedback mode to provide a continuous vector signaling stream equalization.
Claims22
A method for equalizing signals transmitted over a communication bus comprising n wires, the method comprising:
- generating two sets of samples at two distinct time instances;
- determining the rank order of the first set of samples;
- using the result of the rank order to generate a set of coefficients;
- and
- subtracting the set of coefficients from the second set of samples.
A method for equalizing signals transmitted over a communication bus comprising n wires, the method comprising:
- generating a set of M samples at M distinct time instances;
- determining the rank order of the first set of samples;
- using the result of the rank ordering to generate M−1 sets of coefficients;
- and
- subtracting each of the sets of coefficients from the next M−1 samples.
A system for equalizing a set of signals transmitted over a communication bus, the system comprising:
- an input for receiving signals from the communication bus;
- means for generating two sets of samples of the signals present on the communication bus;
- means for performing a rank-order operation on the first set of samples;
- means for generating a set of coefficients based on the result of the rank-order operation;
- and
- means for subtracting the set of coefficients from the second set of samples.
Dependencies are inferred from the claim text.