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:
Apr. 29, 2014
Filed:
Jul. 26, 2012
Hiroyoshi Ishikawa, Yokohama, JP;
Kazuo Nagatani, Yokohama, JP;
Nobukazu Fudaba, Yokohama, JP;
Yuichi Utsunomiya, Kawasaki, JP;
Hiroyoshi Ishikawa, Yokohama, JP;
Kazuo Nagatani, Yokohama, JP;
Nobukazu Fudaba, Yokohama, JP;
Yuichi Utsunomiya, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A distortion compensation device includes: a frequency-characteristic adding unit configured to add a frequency characteristic to an error signal to generate an added error signal, the error signal being a difference between an input signal input to an amplifier and an output signal output from the amplifier; a distortion-compensation-coefficient updating unit configured to update a distortion compensation coefficient for compensating for a distortion characteristic of the amplifier based on the added error signal; and a distortion compensation unit configured to perform distortion compensation on the input signal using the updated distortion compensation coefficient.