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:
Nov. 25, 2014
Filed:
Sep. 12, 2012
Daisuke Masunaga, Yokohama, JP;
Satoshi Matsubara, Kawasaki, JP;
Takeshi Ohba, Yokosuka, JP;
Hideharu Shako, Yokohama, JP;
Daisuke Masunaga, Yokohama, JP;
Satoshi Matsubara, Kawasaki, JP;
Takeshi Ohba, Yokosuka, JP;
Hideharu Shako, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A distortion compensator compensates for distortion of a signal caused by an amplifier. A storage section stores a plurality of compensation coefficients used for distortion compensation. A selection section selects a compensation coefficient corresponding to an index value indicative of a power level of the signal from among the plurality of compensation coefficients. The selection section determines whether or not the power level is higher than a threshold, and uses, based on a determination result, a first index value calculated without using a logarithmic operation or a second index value calculated by using a logarithmic operation.