Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2008-07-30
2011-10-25
Puente, Eva (Department: 2611)
Pulse or digital communications
Equalizers
Automatic
C375S233000, C375S348000, C375S349000, C370S222000
Reexamination Certificate
active
08045608
ABSTRACT:
In described embodiments, an adaptive equalizer employed by a receiver in a communication channel, such as Fibre Channel, employs pattern recognition. When a repeating pattern, such as an IDLE or ARBFF pattern, is employed by a standard to, for example, maintain a communication link, an equalizer of the receiver might adaptively set its equalizer parameters based on characteristics of the signal energy of the repeating pattern rather than adaptively set its equalizer parameters based on characteristics of the signal energy of generally random user data carried on the link. Pattern recognition by the receiver allows for maintaining adaptive equalizer parameters at settings preferred for data detection of the typical random data, improving data detection performance of the receiver when the channel transitions from a preset or synchronization repeating pattern to a user random data pattern.
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Dai Xingdong
Daugherty Dwight
Farley Dennis
Mobin Mohammad
Olsen Max
Agere Systems Inc.
Puente Eva
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