Equalizer/forward error correction automatic mode selector

Details Equalizer/forward error correction automatic mode selector Equalizer/forward error correction automatic mode selector

2007-01-02

2007-01-02

Bayard, Emmanuel (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

Reexamination Certificate

active

10511387

ABSTRACT:
An apparatus for automatically selecting one of a standard decision directed mode and a soft dd mode in a decision feedback equalizer for receiving a data signal includes an equalizer utilizing forward error correction for providing first and second output signals corresponding to a DFE automatic switching mode and a soft automatic switching mode, respectively, and a comparator for comparing byte error rates of the first and second output signals for selecting as a superior mode that mode associated with a lower ByER and outputting the output signal with the lower ByER. A lock detector provides a lock signal derived from the DFE output signal with the lower ByER and a mode switch selectively places the DFE outputs in one of the dd modes or a blind mode, depending on the lock signal.

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Copy of Search Report dated Jun. 10, 2003.

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