| 摘要 |
Disclosed is a radio communication system for performing data communication by a backscatter system using absorption and reflection of a received radio wave, wherein a data reading device transmits an unmodulated carrier of frequency f O ; a data transmitting device subjects transmission data to primary modulation with a center frequency f S , and subjects a signal resulting from the primary modulation (12) to secondary modulation (13) by multiplying the signal resulting from the primary modulation by an input of the unmodulated carrier of the backscatter system so as to generate a reflected modulated wave in which one of frequencies f O + f S and f O - f S is suppressed; and the data reading device receives a reflected wave signal in which one of the frequencies f O + f S and f O - f S is suppressed from the data transmitting device.
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