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. 19, 2007
Filed:
Dec. 19, 2003
Koichi Okawa, Yokohama, JP;
Anil Umesh, Yokohama, JP;
Shinya Tanaka, Yokohama, JP;
Takehiro Nakamura, Yokosuka, JP;
Koichi Okawa, Yokohama, JP;
Anil Umesh, Yokohama, JP;
Shinya Tanaka, Yokohama, JP;
Takehiro Nakamura, Yokosuka, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
The object of the present invention to provide a directional beam communication system whereby the beam width of a directional beam to be transmitted is reduced by sharing an array antenna among a plurality of adjacent sectors so as to increase the interference suppression effect. The directional beam communication system is configured to communicate with a mobile station MS located in a service area formed by a plurality of sectors Sand Susing a directional beam which is transmitted by an array antenna A including a plurality of antenna elements a. The array antenna A for transmitting the directional beam is shared among at least two adjacent sectors Sand S