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:
May. 01, 2007
Filed:
Jul. 23, 2003
Naoki Hongo, Tokyo, JP;
Masaki Suto, Tokyo, JP;
Toshio Takada, Tokyo, JP;
Hidefumi Ito, Tokyo, JP;
Shuhei Miura, Tokyo, JP;
Naoki Hongo, Tokyo, JP;
Masaki Suto, Tokyo, JP;
Toshio Takada, Tokyo, JP;
Hidefumi Ito, Tokyo, JP;
Shuhei Miura, Tokyo, JP;
Hitachi Kokusai Electric Inc., Tokyo, JP;
Abstract
A distortion compensator compensates for distortion arising in an amplifier that amplifies a signal with improved efficiency. The distortion compensator includes a signal level detector which detects the level of a signal to be amplified by an amplifier, a distortion compensation execution unit which executes distortion compensation on the signal to be amplified according to a mode of distortion compensation corresponding to the signal level detected by the signal level and a correspondence between signal levels and distortion compensation control values as pairs, a distortion compensation control value correspondence updater which updates the correspondence between the signal levels and the distortion compensation control values used in the execution of distortion compensation, and a distortion compensation control value number controller which controls the values of stipulated parameters.