Pulse or digital communications – Multilevel – With threshold level
Reexamination Certificate
2004-12-22
2009-11-10
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Multilevel
With threshold level
C375S233000, C375S324000, C375S340000, C375S348000
Reexamination Certificate
active
07616700
ABSTRACT:
A slicer can receive a communication signal having a level or amplitude that is between two discrete levels of a multilevel digital communication scheme. The slicer can compare the communication signal to a plurality of references such that multiple comparisons proceed essentially in parallel. A summation node can add the results of the comparisons to provide an output signal set to one of the discrete levels. The slicer can process the communication signal and provide the output signal on a symbol-by-symbol basis. A decision feedback equalizer (“DFE”) can comprise the slicer. A feedback circuit of the DFE can delay and scale the output signal and apply the delayed and scaled signal to the communication signal to reduce intersymbol interference (“ISI”).
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Gebara Edward
Kim Andrew Joo
Pelard Cattalen
King & Spalding
Liu Shuwang
Quellan Inc.
Yu Lihong
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