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. 27, 2007
Filed:
Nov. 14, 2003
Yasuaki Yuda, Kanagawa, JP;
Takaaki Kishigami, Tokyo, JP;
Takashi Fukagawa, Kanagawa, JP;
Keiji Takakusaki, Kanagawa, JP;
Shoji Miyamoto, Miyagi, JP;
Yasuaki Yuda, Kanagawa, JP;
Takaaki Kishigami, Tokyo, JP;
Takashi Fukagawa, Kanagawa, JP;
Keiji Takakusaki, Kanagawa, JP;
Shoji Miyamoto, Miyagi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A radio communication apparatus using an array antenna has a plurality of reception branches for conveying reception signals received at the antenna element of the array antenna, and a calibration branch for selecting one of the plurality of reception branches and conveying the reception signal. Channel estimations are made respectively on the reception-branch signals and a calibration-branch signal. RAKE composition is made on the channel estimation values, a result of which is used to detect amplitude and phase deviations on the reception branch thereby carrying out a correction.