Title:
ORTHOGONAL DEMODULATION DEVICE, ORTHOGONAL DEMODULATION METHOD, AND PROGRAM FOR ORTHOGONAL DEMODULATION
Document Type and Number:
WIPO Patent Application WO/2007/105758
Kind Code:
A1
Abstract:
Provided is an orthogonal demodulation device, which makes effective use of the
result of an orthogonal detection so as to improve a demodulation efficiency. The
orthogonal demodulation device comprises an orthogonal detector (DT) for orthogonally
detecting a received signal obtained by receiving a radio wave from a radio discrimination
tag, thereby to generate an in-phase signal and an orthogonal phase signal, and
a demodulating circuit (DM) for detecting the preamble of a specific transition
pattern from at least one of the in-phase signal and the orthogonal phase signal,
for decoding at least one of the in-phase signal and the orthogonal phase signal
so as to attain the data subsequent to that preamble, and for performing an error
detection on the decoding result so as to confirm the existence of an error.
Inventors:
SANO KOUICHI (JP)
MATSUMOTO YASUO (JP)
KATO MASAKAZU (JP)
SHIMURA TAKAHIRO (JP)
MATSUMOTO YASUO (JP)
KATO MASAKAZU (JP)
SHIMURA TAKAHIRO (JP)
Application Number:
PCT/JP2007/055094
Publication Date:
September 20, 2007
Filing Date:
March 14, 2007
Export Citation:
Assignee:
TOSHIBA TEC KK (JP)
SANO KOUICHI (JP)
MATSUMOTO YASUO (JP)
KATO MASAKAZU (JP)
SHIMURA TAKAHIRO (JP)
SANO KOUICHI (JP)
MATSUMOTO YASUO (JP)
KATO MASAKAZU (JP)
SHIMURA TAKAHIRO (JP)
International Classes:
H04L27/22; G06K17/00; H03D3/06; H04B5/02
Foreign References:
| JP2006005651A | 2006-01-05 | |||
| JPH11239078A | 1999-08-31 | |||
| JP2002185546A | 2002-06-28 | |||
| JP2000254069A | 2000-09-19 | |||
| US6501807B1 | 2002-12-31 |
Other References:
See also references of EP 1995925A4
Attorney, Agent or Firm:
SUZUYE, Takehiko et al. (1-12-9 Toranomon, Minato-k, Tokyo 01, JP)
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