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:
Mar. 07, 2017
Filed:
Nov. 05, 2014
Distortion compensation apparatus, wireless communication system, and distortion compensation method
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Yoshinobu Shizawa, Yokohama, JP;
Hiroaki Maeda, Yokohama, JP;
Junya Morita, Yokohama, JP;
Hiroyuki Ogawa, Yokosuka, JP;
Yousuke Okazaki, Kawasaki, JP;
Satoshi Matsubara, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A distortion compensation apparatus including: an amplifier configured to amplify an input signal including a transmission signal and an impulse signal, the transmission signal being converted to a radio frequency signal for transmission, the impulse signal being not converted to a radio signal for transmission, a memory configured to store a plurality of distortion compensation coefficients for compensating distortion to the input signal, each of the plurality of distortion compensation coefficients being associated with an amplitude of the input signal, and a processor configured to select a distortion compensation coefficient from the plurality of distortion compensation coefficients based on an amplitude of the impulse signal included in the input signal, and update the selected distortion compensation coefficient based on the amplified impulse signal include in the amplified input signal.