Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2007-08-14
2007-08-14
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S231000, C375S233000, C375S232000
Reexamination Certificate
active
10852854
ABSTRACT:
A method and apparatus is disclosed to overcome the effects of intersymbol interference during data transmission. Overcoming the effects of intersymbol interference makes possible higher data transmission rates for a given error rate. In one embodiment a receiver processing system a first, second and third filter, such that the second and third filter comprise feedback filters. Filter coefficients are calculated to reduce the undesirable effects of the channel, such as intersymbol interference. A training process occurs to establish the first filter as a mixed phase filter and the third filter as minimum phase filter. The second filter is configured based on the transfer function of the channel and one or more coefficients may be set to a predetermined value.
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Jones William W.
Zimmerman George A.
Fan Chieh M.
Pathak Sudhanshu C.
Solarflare Communications, Inc.
Weide & Miller Ltd.
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