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:
Sep. 11, 2012
Filed:
Nov. 05, 2009
Masafumi Tsutsui, Kawasaki, JP;
Masafumi Tsutsui, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A wireless communication apparatus of a base station uses antennas for multiple systems, forms a multi-beam, transmits data to a mobile station, and includes a code book configured to store therein beamforming information; a pre-coder that reads the code book and executes a process of forming a given beam for the data; a control unit that, based on feedback information to correct variations in phase occurring at transmitting circuits respectively corresponding to each of the systems, performs control such that the beamforming information to correct the variations in phase is read from the code book; and a phase correcting unit that corrects a phase of the multi-beam formed by the pre-coder, based on the feedback information and such that relations among the phases of the multi-beam become substantially linear.