Patent ID: 8811898

Claim:
An information processing device comprising: a communication antenna having a variable Q value, for performing contactless-type communication with an external device by using a communication path capable of transmitting and receiving a signal using a carrier of a predetermined frequency; a storage unit configured to store communication setting information including at least one communication speed supported by the information processing device, wherein a communication speed request is transmitted to the external device, the communication speed request including information on at least one communication speed supported by the information processing device other than a speed used to transmit the communication speed request and a request for communication speed information supported by the external device; a communication speed determining unit configured to determine a communication speed in the communication with the external device based on the communication setting information stored in the storage unit and the communication speed information supported by the external device; a communication controlling unit configured to allow the Q value of the communication antenna to be set to a value corresponding to a determined communication speed based on the communication speed determined in the communication speed determining unit; a carrier signal generating unit configured to generate a carrier signal of the predetermined frequency to be transmitted to the external device, wherein the communication speed determining unit allows the carrier signal generating unit to generate the carrier signal corresponding to the communication speed request; and an amplifying unit having a variable amplification factor, configured to amplify the carrier signal with a set amplification factor to transmit to the communication antenna, wherein the amplification factor of the amplifying unit is set to a value corresponding to the Q value of the communication antenna based on the communication speed determined in the communication speed determining unit.