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:
Jul. 22, 2014
Filed:
Oct. 27, 2010
Applicant:
Toru Matsuura, Kanagawa, JP;
Inventor:
Toru Matsuura, Kanagawa, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 25/49 (2006.01);
U.S. Cl.
CPC ...
Abstract
A transmitter compensates for AM/PM distortion and operates with low distortion and high efficiency. A compensation section calculates an amplitude signal M representing the magnitude of a vector consisting of Iand Qsignals which pass through LPFs, respectively, thereby predicting variation of the envelope of a radio frequency signal Pi, which variation occurs due to I' and Q′ signals passing through LPFs, respectively. The compensation section calculates a phase compensation amount θcomp, based on the calculated amplitude signal M, and adds the phase compensation amount θcomp to a phase signal θ.