INTERROGATING APPARATUS, RFID INTERROGATOR, RFID INTERROGATING PROGRAM, AND RFID INTERROGATING METHOD

摘要

PROBLEM TO BE SOLVED: To suppress signal interference between RFID interrogators and signal interference to an electronic tag from an RFID interrogator while securing frequency usage efficiency.;SOLUTION: An apparatus has a data transmitting unit 21 for transmitting a transmission signal to the electronic tag, a data receiving unit 22 for receiving a response signal relating to the transmission signal from the electronic tag within a predetermined time period after transmitting the transmission signal at the data transmitting unit 21, a tag reception SINR estimating unit 31 for estimating an SINR value relating to reception at an electronic tag side as a tag reception SINR estimated value based on a response signal from the electronic tag received at the data receiving unit 22, and a transmission control unit 32 for controlling the data transmitting unit 21 to perform variable control about the modulation degree of the transmission signal so that the tag reception SINR estimated value which is estimated at the tag reception SINR estimating unit 31 becomes a reception-allowable predetermined SINR value.;COPYRIGHT: (C)2010,JPO&INPIT