Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2011-03-22
2011-03-22
Deppe, Betsy L (Department: 2611)
Pulse or digital communications
Equalizers
Automatic
C375S229000, C375S341000, C375S350000
Reexamination Certificate
active
07912119
ABSTRACT:
A method used in an adaptive survivor based channel equalizer, the method comprises selecting at a decision time a survivor in a Viterbi trellis and a corresponding equalizer, adaptively updating at the decision time the corresponding equalizer to define a new corresponding equalizer for use at a next decision time, retrieving the new corresponding equalizer as defined at an earlier decision time, and using the new corresponding equalizer as defined at an earlier decision time as an equalizer for other survivors in the Viterbi trellis at the next decision time. A corresponding adaptive survivor based channel equalizer includes a fixed pre-filter configured to provide a pre-filtered signal to a reduced state sequence estimator (RSSE) which is configured for providing recovered symbols. A coefficient adaptor is coupled to the RSSE and configured to essentially perform the method.
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Chen Weizhong
Dehner Leo G.
Deppe Betsy L
Freescale Semiconductor Inc.
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