Title:
COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP3956880
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a communication system for protecting individual information by eliminating the need for unnecessarily transmitting the individual information.
SOLUTION: A responder 3a stores a group ID to a memory 44, makes a band decision section 43 decide the frequency of a subcarrier when receiving the transmission request of the group ID from an interrogator, uses a subcarrier modulator 46 to modulate the subcarrier generated from a subcarrier oscillator 45 on the basis of the group ID read by a subcarrier information generating section 42, and returns the modulated subcarrier to the interrogator as a modulation reflection wave by means of reflection.
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Inventors:
Kazuya Taki
Tsutomu Ohashi
Takuya Nagai
Tsutomu Ohashi
Takuya Nagai
Application Number:
JP2003086078A
Publication Date:
August 08, 2007
Filing Date:
March 26, 2003
Export Citation:
Assignee:
Brother Industries, Ltd.
International Classes:
H04B1/59; H04B1/713; H04B5/02; H04B1/7143; (IPC1-7): H04B1/59; H04B1/713; H04B5/02
Domestic Patent References:
| JP8021875A | ||||
| JP2000049656A |
Foreign References:
| WO1998021691A1 |
Attorney, Agent or Firm:
Yoshiyuki Kaji
Makoto Suhara
Katsunori Muto
Makoto Suhara
Katsunori Muto
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