Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2009-09-25
2010-06-29
Bocure, Tesfaldet (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
C332S124000
Reexamination Certificate
active
07746957
ABSTRACT:
A distortion correction control apparatus is for compensating for a burst distortion in a transmission amplifier caused by a burst of an input signal of a transmission target. The apparatus includes a holding unit that stores a distortion correction coefficient having reverse characteristics to the burst distortion; a unit that multiplies the distortion correction coefficient read out from the holding unit by the input signal or adds the distortion correction coefficient read out from the holding unit to the input signal, upon reception of burst information notifying of switching between presence and absence of the input signal; and an update unit that updates, based on the input signal, the distortion correction coefficient of the last time, and a signal fed back as an output signal of the transmission amplifier, the distortion correction coefficient by an adaptive algorithm, and that inputs the updated distortion correction coefficient to the holding unit.
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Fudaba Nobukazu
Hamada Hajime
Ishikawa Hiroyoshi
Nagatani Kazuo
Oishi Yasuyuki
Bocure Tesfaldet
Fujitsu Limited
Hanify & King, PC
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