| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication system for protecting individual information by eliminating the need for unnecessarily transmitting the individual information. <P>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. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
