Title:
RADIO ARRIVAL DIRECTION ESTIMATION DEVICE AND RADIO ARRIVAL DIRECTION ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2010/038359
Kind Code:
A1
Abstract:
A radio arrival direction estimation device that accurately estimates the arrival direction of radio waves from a desired tag, even when there are multiple antennas disposed at short intervals. When ID detection timing is provided from a timing detector (114) to a switch (201), relative amplitude/phase data related to the tag ID digital value “1” or “0” is obtained by an arrival direction estimation unit (125). One relative amplitude/phase datum is formed for each unit cycle in a first adder (202), which adds the relative amplitude/phase datum related to the tag ID digital value “1” to each element in a matrix, and a second adder (203), which adds the relative amplitude/phase datum related to the tag ID digital value “0” to each element in a matrix. An OOK signal causes an arithmetic unit (204) to subtract the relative amplitude/phase data produced by the second adder (203) from the relative amplitude/phase data produced by the first adder (202), and extract the phase of a signal corresponding to the phase of the digital value “1.”
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Inventors:
FUKAGAWA TAKASHI
NAKAGAWA YOICHI
MUKAI HIROHITO
NAKAGAWA YOICHI
MUKAI HIROHITO
Application Number:
PCT/JP2009/004396
Publication Date:
April 08, 2010
Filing Date:
September 04, 2009
Export Citation:
Assignee:
PANASONIC CORP (JP)
FUKAGAWA TAKASHI
NAKAGAWA YOICHI
MUKAI HIROHITO
FUKAGAWA TAKASHI
NAKAGAWA YOICHI
MUKAI HIROHITO
International Classes:
G01S13/74; G01S3/46; G06K17/00; H04J13/00
Foreign References:
| JP2008008887A | 2008-01-17 | |||
| JP2008045954A | 2008-02-28 | |||
| JP2006105723A | 2006-04-20 | |||
| JP2007518968A | 2007-07-12 |
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
Koichi Washida (JP)
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