The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2010
Filed:
Sep. 25, 2009
Hiroyoshi Ishikawa, Kawasaki, JP;
Kazuo Nagatani, Kawasaki, JP;
Hajime Hamada, Kawasaki, JP;
Nobukazu Fudaba, Kawasaki, JP;
Yuichi Utsunomiya, Kawasaki, JP;
Yasuyuki Oishi, Kawasaki, JP;
Hiroyoshi Ishikawa, Kawasaki, JP;
Kazuo Nagatani, Kawasaki, JP;
Hajime Hamada, Kawasaki, JP;
Nobukazu Fudaba, Kawasaki, JP;
Yuichi Utsunomiya, Kawasaki, JP;
Yasuyuki Oishi, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
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.