| 摘要 |
An information-processing apparatus shown in FIG. 4 is a wireless communication apparatus for communicating prescribed data in wireless with a back-scattering communication scheme, in which a tag ( 10 ) for receiving a carrier wave signal Sf having a frequency of 2.45 GHz and transmitting response signal Sf (D) obtained by modulating the carrier wave signal Sf based on the data and a tag reader ( 20 ) for transmitting a carrier wave signal to the tag ( 10 ) and receiving and signal-processing a response composite signal that is returned from the tag ( 10 ) are provided. This tag reader ( 20 ) has a carrier-wave-compensating circuit ( 30 ) that compares a phase of the carrier wave signal in transmitting the carrier wave signal and a phase of the carrier wave signal in receiving the carrier wave signal and eliminates a carrier wave composite signal that is not synchronized with the carrier wave signal in transmitting the carrier wave signal based on a comparison result thereof.
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