Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2005-09-20
2005-09-20
Chin, Stephen (Department: 2634)
Pulse or digital communications
Equalizers
Automatic
C375S229000, C375S230000, C375S219000
Reexamination Certificate
active
06947482
ABSTRACT:
A method and a system for providing ISI compensation to an input signal in a bifurcated manner. ISI compensation is provided in two stages, a first stage compensates ISI components induced by characteristics of a transmitter's partial response pulse shaping filter, a second stage compensates ISI components induced by characteristics of a multi-pair transmission channel. First stage ISI compensation is performed in an inverse response filter having a characteristic feedback gain factor K, during system start-up. Second stage ISI compensation is performed by a single DFE in combination with a MDFE operating on tentative decisions output from a Viterbi decoder. As the DFE of the second stage reaches convergence, the feedback gain factor K of the first stage is ramped to zero.
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Abnous Arthur
Azazzi Oscar E.
Hatamian Mehdi
Kruse David
Broadcom Corporation
Chin Stephen
McAndrews Held & Malloy
Ware Cicely
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