Apparatus for and method of controlling a feedforward filter of an equalizer
AssigneeTrident Microsystems (Far East) Ltd.
InventorsJilian Zhu, Scott M. Lopresto, David A. Willming, Shidong Chen, Gopalan Krishnamurthy
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Abstract
A method of controlling a feedforward filter of an equalizer includes the steps of generating a complex representation of an output of the feedforward filter and generating a representation of a decision from an output of the equalizer. The complex representation and the decision representation are correlated to obtain a phase error estimate. A phase correction value is generated based on the phase error estimate and used to adjust the phase of the output of the feedforward filter.
Claims28
A method of controlling a feedforward filter of an equalizer, the method comprising the steps of:
- generating a complex representation of an output of the feedforward filter;
- generating a representation of a decision from an output of the equalizer;
- correlating the decision representation with the complex representation to obtain a phase error estimate;
- generating a phase correction value based on the phase error estimate;
- and adjusting a phase of the output of the feedforward filter using the phase correction value.
A phase tracker for controlling a feedforward Filter of an equalizer. comprising:
- means for generating a complex representation of an output of the feedforward Filter;
- means for generating a representation of a decision from an output of the equalizer;
- means for correlating the decision representation with the complex representation to obtain a phase error estimate;
- means for generating a phase correction value based on the phase error estimate;
- and
- means for adjusting the phase of the output of the feed forward filter using the phase correction value.
Dependencies are inferred from the claim text.