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. 25, 2013
Filed:
Sep. 30, 2009
Masahiko Onishi, Osaka, JP;
Mikhail Illarionov, Osaka, JP;
Masahiko Onishi, Osaka, JP;
Mikhail Illarionov, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
Disclosed is a distortion compensation circuit that efficiently compensates for distortion. A distortion compensation circuit () comprises a sampling memory unit (), which accumulates an input signal and an output signal from an amplifier (), a model estimation unit (), which reads the input and output signals that are accumulated upon the sampling memory unit (), estimates a model that represents an input/output characteristic of the amplifier (), and outputs a coefficient that denotes the model thus estimated, and a distortion compensation unit (), which compensates for a distortion of the amplifier (), based on the coefficient. The distortion compensation circuit () further comprises a control unit (), which causes the accumulation of the input signal and the output signal upon the sampling memory unit () of a predetermined length, and controls the sampling memory unit () to accumulate the input and output signals anew in order to obtain a new coefficient after the distortion compensation is carried out by the distortion compensation unit () according to the coefficient that is obtained from the input and output signals that have been accumulated upon the memory unit.