Decision feedback equalization with composite trellis slicer
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United States of America Patent
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Mar 16, 2010
Grant Date -
Jun 21, 2007
app pub date -
Jun 21, 2006
filing date -
Dec 20, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A decision feedback equalizer is configured to equalize an input signal to generate a recovered output signal. Linear feed-forward filter circuitry is configured to provide a linearly filtered output signal based on the input signal. Composite trellis decoder circuitry configured to process a combined signal that is based on a combination of at least the linearly feed-forward filtered output signal and on output of linear or non-linear feedback filter circuitry, in accordance with state metrics generated by processing a composite trellis diagram relative to the combined signal, to provide a trellis-decoded output signal as input to the linear or non-linear feedback filter circuitry. The composite trellis decoder circuitry is further configured to provide a particular phase output of the combined signal, based on the state metrics, as the decoded output signal.
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