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. 30, 2019
Filed:
May. 29, 2018
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Tomohiro Nakamura, Kawasaki, JP;
Takanori Iwamatsu, Nasushiobara, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A distortion compensation apparatus includes: a filtering unit that is provided with a plurality of storing units each of which is capable of storing a signal therein and that filters an input signal by sequentially moving the input signal starting from a storing unit provided on a first stage up to another storing unit provided on a final stage; a calculating unit that calculates a power level of a signal output from a storing unit that is provided on an earlier stage than the storing unit provided on the final stage; an output unit that, on the basis of the power level calculated, outputs a distortion compensation coefficient used for cancelling out non-linear distortion occurring in an amplifier; and a distortion compensation unit that performs a distortion compensation process on a signal output from the storing unit provided on the final stage, by using the distortion compensation coefficient.