Title:
RADIO WAVE ARRIVAL DIRECTION DETECTING METHOD AND APPARATUS
Document Type and Number:
Japanese Patent JP3867069
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a radio wave arrival direction detecting apparatus for one-dimensionally or two-dimensionally and simultaneously and accurately detecting radio wave arrival directions of a plurality of radio signals.
SOLUTION: The radio wave arrival direction detecting apparatus is, as shown in the figure, provided with one excitation element A0, an array antenna apparatus 100 comprising six nonexcitation elements A1-A6, a radio receiver 10 and a controller 20. The controller 20 detects each received signal y(t) received by the array antenna apparatus 100 when a set of reactance values of different variable reactance elements 12-1 to 12-6 is set, calculates a correlation matrix Ryy based on the received signals, decomposes the calculated correlation matrix Ryy into eigenvalues, calculates an eigenvector of the correlation matrix Ryy, calculates a MUSIC spectrum based on the calculated eigenvector by using a MUSIC method and calculates the arrival directions of the received signals based on the calculated MUSIC spectrum.
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Inventors:
Shun
Akifumi Hirata
Takashi Ohira
Akifumi Hirata
Takashi Ohira
Application Number:
JP2003297741A
Publication Date:
January 10, 2007
Filing Date:
August 21, 2003
Export Citation:
Assignee:
International Telecommunications Research Institute Ltd.
International Classes:
G01S3/16; G01S3/04; G01S3/74; H01Q3/44; H01Q19/32; (IPC1-7): G01S3/16; G01S3/04; G01S3/74
Domestic Patent References:
| JP10154911A | ||||
| JP2001024431A | ||||
| JP2002246826A | ||||
| JP2004254001A | ||||
| JP2004257753A | ||||
| JP2004257820A | ||||
| JP2005062040A | ||||
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| JP9199925A | ||||
| JP2000199784A |
Other References:
プラプース・シリル、他4名,“エスパアンテナによるリアクタンスドメインMUSIC法”,電子情報通信学会技術研究報告,社団法人電子情報通信学会,2002年 8月23日,Vol.102、No.282,P.1-8(RCS2002-147)
T. Ohira et al.,“Electronically steerable passive array radiator antennas for low-cost analog adaptive beamforming”,2000 IEEE International Conference on Phased Array System & Technology,2002年 5月21日,p.101-104
小松崎彰、他3名,“高次元アルゴリズムによるESPARアンテナのリアクタンス最適化”,電子情報通信学会技術研究報告,2000年 5月11日,Vol1.100 No.37,p.17-22
大平孝、他2名,“マイクロ波信号処理によるアダプティブビーム形成と電子制御導波器(ESPAR)アンテナの提案”,電子情報通信学会技術研究報告,1999年 7月23日,Vol.99 No.213,p.9-14
T. Ohira et al.,“Electronically steerable passive array radiator antennas for low-cost analog adaptive beamforming”,2000 IEEE International Conference on Phased Array System & Technology,2002年 5月21日,p.101-104
小松崎彰、他3名,“高次元アルゴリズムによるESPARアンテナのリアクタンス最適化”,電子情報通信学会技術研究報告,2000年 5月11日,Vol1.100 No.37,p.17-22
大平孝、他2名,“マイクロ波信号処理によるアダプティブビーム形成と電子制御導波器(ESPAR)アンテナの提案”,電子情報通信学会技術研究報告,1999年 7月23日,Vol.99 No.213,p.9-14
Attorney, Agent or Firm:
Masahiro Ishino