Title:
READER DEVICE, AND TRANSMITTING METHOD AND TAG OF THE SAME
Document Type and Number:
Japanese Patent JP2006005651
Kind Code:
A
Abstract:
To provide a transmitting method capable of improving the efficiency of power supply from a reader to an RF tag to improve frequency use efficiency of wireless communication from the reader to the RF tag without increasing the bandwidth and also extend a communication distance from the RF tag to the reader.
A reader device which communicates with the RF tag by wireless has a sending-out means of making constant peaks of respective symbols of a signal after N-value (N:≥4) Manchester coding modulation and sending out a signal whose symbols are made partially different in amplitude value and a means of receiving and demodulating the signal from the RF tag.
Inventors:
TANAKA YOSHIAKI
GOTO KUNIHIKO
YAMAZAKI DAISUKE
GOTO KUNIHIKO
YAMAZAKI DAISUKE
Application Number:
JP2004179824A
Publication Date:
January 05, 2006
Filing Date:
June 17, 2004
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H04B1/59; G01S13/75; G01S13/76; G06K7/00; G06K17/00; G06K19/07; H03M5/12; H04B5/02; H04L25/49; H04L27/02
Attorney, Agent or Firm:
Junichi Yokoyama
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