Title:
MULTI-BEAM ANTENNA SYSTEM FOR RADIO BASE STATION
Document Type and Number:
Japanese Patent JP3798549
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To perform transmission beam forming when incoming signals are present and to stop the transmission beam forming, when the incoming signals are not present.
SOLUTION: In a CDMA radio base station 11, plural incoming beams are formed electrically by executing beam forming to signals received by the plural antenna elements of a reception side array antenna in a reception beam former RBF, and reception is performed based on an optimum beam (for instance, the beam of maximum power) among the plural incoming beams. Also, a transmission beam former TBF for executing the beam forming to transmission signals is provided and a control part CNT controls whether or not to form the outgoing transmission beam of the same direction as the incoming reception beam by forming an outgoing beam to form the outgoing beam.
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Inventors:
Yoshiki Tanaka
Kobayakawa Zhou Magnetism
Masafumi Tsutsui
Kobayakawa Zhou Magnetism
Masafumi Tsutsui
Application Number:
JP6852498A
Publication Date:
July 19, 2006
Filing Date:
March 18, 1998
Export Citation:
Assignee:
富士通株式会社
International Classes:
H04J13/00; H01Q1/24; H01Q3/26; H01Q3/40; H01Q25/00; H04B7/06; H04B7/08; H04B7/10; H04W16/28; (IPC1-7): H04J13/00; H01Q3/26; H01Q3/40; H01Q25/00
Domestic Patent References:
| JP8316722A | ||||
| JP8167871A | ||||
| JP8503355A | ||||
| JP7087011A |
Other References:
土田誠幸, 大洞喜正,移動無線用CDMAシステムにおけるアダプティブアレイアンテナの検討,電子情報通信学会技術研究報告, RCS97-181,電子情報通信学会,1998年 1月23日,p77-p81
Attorney, Agent or Firm:
Chimitsu Saito