Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2008-04-29
2008-04-29
Kim, Kevin (Department: 2611)
Pulse or digital communications
Equalizers
Automatic
Reexamination Certificate
active
07366234
ABSTRACT:
An adaptive equalization apparatus comprises an equalizer for equalizing a playback signal read from a recording medium, using tap coefficients; a maximum likelihood decoder for subjecting an equalized signal outputted from the equalizer to maximum likelihood decoding; a first delay unit for delay-adjusting the playback signal to make the signal coincide with the timing of a tentative decoded signal that is obtained in the process of maximum likelihood decoding; a second delay unit for delay-adjusting the equalized signal to make the signal coincide with the timing of the tentative decoded signal; and a coefficient adaptive controller for adaptively controlling the tap coefficients so that an error in the maximum likelihood decoding is minimized, on the basis of the tentative decoded signal, an output of the first delay unit, and an output of the second delay unit.
REFERENCES:
patent: 5287385 (1994-02-01), Sugawara et al.
patent: 5-128729 (1993-05-01), None
patent: 2003-51163 (2003-02-01), None
patent: 2003-85764 (2003-03-01), None
patent: 2003-141823 (2003-05-01), None
patent: 9-97476 (2007-04-01), None
Miyashita Harumitsu
Yamamoto Akira
Kim Kevin
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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