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. 29, 2004
Filed:
Oct. 25, 2002
Hiroyoshi Ishikawa, Kawasaki, JP;
Kazuo Nagatani, Kawasaki, JP;
Yasuyuki Oishi, Kawasaki, JP;
Tokuro Kubo, Kawasaki, JP;
Hajime Hamada, Kawasaki, JP;
Nobukazu Fudaba, Kawasaki, JP;
Mitsuharu Hamano, Sapporo, JP;
Tohru Sasaki, Sapporo, JP;
Yuki Kanno, Sapporo, JP;
Koichi Hanada, Sapporo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In an adaptive predistorter type distortion compensating apparatus for calculating a distortion compensating coefficient by using an adaptive algorithm so as to reduce an error between a reference signal and a feedback signal of a circuit which generates a distortion on the basis of the reference signal, and for compensating the distortion by providing the distortion compensating coefficient to the reference signal, a phase adjustment circuit is provided for determining a phase shift value which reduces a phase difference between a reference signal and a feedback signal, for correcting the phase of the reference signal or the feedback signal by the phase shift value, and for calculating the distortion compensating apparatus after the correction.