Adaptive clock-less equalizer circuit
AssigneePlexus Networks, Inc.
InventorRamin Shirani
Life of this patent
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Abstract
A system and method for equalizing a signal is provided. In one implementation, the method includes generating a partially equalized signal from an input signal based on a plurality of coefficients associated with a feed-forward equalizer (FFE); generating decoded bit values based on the partially equalized signal, the decoded bit values being an equalized output signal; measuring error in the partially equalized signal; and adjusting the coefficients associated with the feed-forward equalizer (FFE) based on the error measured in the partially equalized signal. Values of the coefficient are not used to adjust of the coefficients associated with the feed-forward equalizer (FFE).
Claims10
An adaptive equalizer for equalizing a signal, the adaptive equalizer comprising:
- a feed-forward equalizer (FFE) to receive an input signal and generate a partially equalized signal from the input signal based on a plurality of coefficients associated with the feed-forward equalizer (FFE);
- a slicer to receive the partially equalized signal and generate decoded bit values based on the partially equalized signal;
- a signal quality circuit to receive the partially equalized signal from the feed-forward equalizer (FFE) and measure error in the partially equalized signal;
- and
- a convergence algorithm circuit to use a convergence algorithm for adjusting the coefficients associated with the feed-forward equalizer (FFE) based on the error measured in the partially equalized signal by the signal quality circuit,
- wherein values of the coefficient are not needed by the convergence algorithm to determine how much to adjust of the coefficients associated with the feed-forward equalizer (FFE).
A method for equalizing a signal, the method comprising:
- generating a partially equalized signal from an input signal based on a plurality of coefficients associated with a feed-forward equalizer (FFE);
- generating decoded bit values based on the partially equalized signal, the decoded bit values being an equalized output signal;
- measuring error in the partially equalized signal;
- and
- using a convergence algorithm to adjust the coefficients associated with the feed-forward equalizer (FFE) based on the error measured in the partially equalized signal,
- wherein values of the coefficient are not needed by the convergence algorithm to determine how much to adjust of the coefficients associated with the feed-forward equalizer (FFE).
Dependencies are inferred from the claim text.