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:
May. 03, 2011
Filed:
Oct. 05, 2006
Takaaki Kishigami, Tokyo, JP;
Naoki Adachi, Kanagawa, JP;
Yoichi Nakagawa, Tokyo, JP;
Hidekuni Yomo, Tokyo, JP;
Shutai Okamura, Kanagawa, JP;
Takaaki Kishigami, Tokyo, JP;
Naoki Adachi, Kanagawa, JP;
Yoichi Nakagawa, Tokyo, JP;
Hidekuni Yomo, Tokyo, JP;
Shutai Okamura, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A spatial filtering adaptable for an interference wave that appears unsteadily can be implemented and also an interference canceling ability can be increased even in a condition that the interference wave does not steadily exist. At a time of non-active communication, the signals from a plurality of interference source radio communication devicesare received in advance by an interference signal receiving sectionas the pre-process mode, then a resultant interference correlation matrix RI is stored in a storing section, and then an interference wave receiving antenna weight WI used to receive selectively the transmission signals from the interference source radio communication devicesis prepared based on the resultant interference correlation matrix RI. At a time of communication, the operation goes to the receiving process mode to normally receive the signal by a signal separating section, and a variation of the interference wave component is detected by an interference wave level detecting sectionbased on a signal power received using the interference wave receiving antenna weight WI. When the interference wave appears or changes, a desired wave separating/receiving antenna weight used to reduce the interference by using a new interference correlation matrix is changed adaptively.