Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2006-02-03
2009-10-20
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Equalizers
Automatic
C375S229000, C375S231000
Reexamination Certificate
active
07606300
ABSTRACT:
There is provided an apparatus and method for initializing a tap coefficient of an adaptive equalizer constituting a read path for a storage medium, where the apparatus includes an FIR filter, a Viterbi decoder, a level error detector, and a tap coefficient updater, the FIR filter receives a first signal stream and outputs the first signal stream in the form of a second signal stream, the Viterbi decoder corrects a bit error of the second signal stream, the level error detector detects a level error between the second signal stream and a third signal stream that is an ideal output signal corresponding to the second signal stream, the tap coefficient updater selects a tap coefficient minimizing the level error and provides the selected tap coefficient as a tap coefficient of the FIR filter, the tap coefficient minimizing the level error is determined as an initial value in a system initialization mode, and the determined initial value is used as an initial value of the tap coefficient of the FIR filter in a normal operation mode.
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F. Chau & Associates LLC
Fan Chieh M
Joseph Jaison
Samsung Electronics Co,. Ltd.
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