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:
Feb. 26, 2013
Filed:
Jan. 06, 2011
Satoshi Matsubara, Kawasaki, JP;
Shuya Hirata, Kawasaki, JP;
Takeshi Ohba, Kawasaki, JP;
Hideharu Shako, Kawasaki, JP;
Jun Sugiyama, Kawasaki, JP;
Satoshi Matsubara, Kawasaki, JP;
Shuya Hirata, Kawasaki, JP;
Takeshi Ohba, Kawasaki, JP;
Hideharu Shako, Kawasaki, JP;
Jun Sugiyama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A distortion compensating apparatus that compensates signal distortion caused by an amplifier includes a distortion compensating process unit that using a distortion compensation coefficient, compensates distortion of an input signal; a memory unit storing therein the distortion compensation coefficient; and an address generating unit that generates a first address that is based on electrical power of the input signal and is for acquiring the distortion compensation coefficient from the memory unit, and a second address that is based on any one among the electrical power, phase of the input signal and amplitude of the input signal, is for acquiring the distortion compensation coefficient from the memory unit, and is normalized in a normalizing range determined according to the electrical power of the input signal. The distortion compensating process unit acquires the distortion compensation coefficient from the memory unit, based on the first and the second addresses to compensate the distortion.