Title:
受信の指向性制御方法及びアンテナ装置並びにこれを用いた移動体通信の基地局及び移動局
Document Type and Number:
Japanese Patent JP4166401
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve sensitivity characteristics of a directivity control antenna system, using an array antenna. SOLUTION: While using an azimuth 11 of a received signal and a power 12 of the received signal estimated by an azimuth/power estimating means 4, an angle difference between an azimuth 13 of a desired signal and the azimuth of an interference signal and the ratio of an interference signal power to a desired signal power are calculated, and on the basis of the previously found thresholds of the angle difference and the power ratio, an optimal weight coefficient 16 is selected out of a beam forming weight coefficient 14 and a null- forming weight coefficient 15 by a weight coefficient selecting means 8. By performing weight combining processing to a received intermediate frequency signal or baseband signal 10, while using the optimal weight coefficient 16 selected by the weight coefficient selecting means 8, and the directivity of receiving is synthesized by a receiving directivity synthesizing means 9.
Inventors:
Yoichi Nakagawa
Takashi Fukagawa
Hiroyuki Tsuji
Ami Kanazawa
Takashi Fukagawa
Hiroyuki Tsuji
Ami Kanazawa
Application Number:
JP2000039818A
Publication Date:
October 15, 2008
Filing Date:
February 17, 2000
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
National Institute of Information and Communications Technology
National Institute of Information and Communications Technology
International Classes:
H01Q3/26; G01S3/28; G01S7/02; H04B7/26
Domestic Patent References:
| JP11234197A | ||||
| JP2000022612A | ||||
| JP11274976A | ||||
| JP11046112A |
Attorney, Agent or Firm:
Masahiro Kurai