Rfid reader/writer, rfid system, and communication method
AssigneeOMRON Corporation
InventorKazushi YAMASAKI
Life of this patent
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Abstract
An RFID reader/writer includes a transmitter that transmits a transmitted signal to an RFID tag and a receiver that receives a received signal from the RFID tag based on the transmitted signal. The transmitter transmits a carrier wave. The RFID reader/writer includes a detector that detects a noise of the received signal received by the receiver, and a controller that controls the transmitter and the detector such that the detector detects the noise included in the received signal, when the detector outputs the carrier wave transmitted from the transmitter prior to the communication with the RFID tag.
Claims20
An RFID reader/writer comprising:
- a transmitter that transmits a transmitted signal to an RFID tag, the transmitter transmitting a carrier wave;
- a receiver that receives a received signal from the RFID tag based on the transmitted signal;
- a detector that detects a noise of the received signal received by the receiver;
- and
- a controller that controls the transmitter and the detector such that the detector detects the noise included in the received signal, when the detector outputs the carrier wave transmitted from the transmitter prior to communication with the RFID tag.
A communication method in which an RFID reader/writer perform communication with an RFID tag, the RFID reader/writer including a transmitter that transmits a transmitted signal to the RFID tag and a receiver that receives a received signal from the RFID tag based on the transmitted signal, the communication method comprising the steps of:
- transmitting a carrier wave from the transmitter;
- detecting a noise, which is included in the received signal when the transmitter outputs the carrier wave transmitted from the transmitter prior to the communication with the RFID tag;
- and
- performing the communication with the RFID tag at a frequency having a low detected noise.
Dependencies are inferred from the claim text.