Title:
METHOD FOR ESTIMATING RADIO ARRIVAL DIRECTION AND ANTENNA DEVICE
Document Type and Number:
Japanese Patent JP3920483
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce the number of receivers, to miniaturize a device, to reduce costs, and to provide a method for estimating a radio arrival direction, in which the radio arrival direction is estimated by fewer calculation processings even in an unknown radio environment.
SOLUTION: In this method for estimating a radio arrival direction, arrival radio waves are received by plural antenna elements constituting an array antenna, and the arrival direction of the arriving radio waves is estimated from a received signal generated by inputting a high frequency signal obtained by this reception to one receiver by BS(beam space)/MUSIC(multiple signal classification). At first, first arrival direction estimation is conducted in a state in which plural antenna beam width is wide (S1-S3), and then second arrival direction estimation is conducted in a state in which plural antenna beam width is narrower in the estimated direction obtained by the first arrival direction estimation (S4-S6).
Inventors:
Kisho Odate
Hiroki Shoki
Hiroki Shoki
Application Number:
JP37274098A
Publication Date:
May 30, 2007
Filing Date:
December 28, 1998
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H01Q3/26; G01S3/48; G01S3/74; H01Q25/00; (IPC1-7): H01Q3/26
Domestic Patent References:
| JP9074375A | ||||
| JP8084015A | ||||
| JP6252637A | ||||
| JP10027299A | ||||
| JP10256821A | ||||
| JP10107723A | ||||
| JP2029994B2 | ||||
| JP10186012A | ||||
| JP9033628A | ||||
| JP9199925A | ||||
| JP9232848A | ||||
| JP10290112A | ||||
| JP2206776A |
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai
Sadao Muramatsu
Ryo Hashimoto
Satoshi Kono
Makoto Nakamura
Shoji Kawai