Importance

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Abstract

A communication device includes a first generation unit, a common unit, a second generation unit, a suppression unit, and an adjustment unit. The common unit inputs a carrier wave generated by the first generation unit from an input terminal and outputs the carrier wave from an input and output terminal, and outputs a signal input from an output terminal. The second generation unit generates a cancelation signal by changing an amplitude and a phase of the carrier wave. The suppression unit suppresses a self-interference signal included in the signal output from the output terminal using the cancelation signal. The adjustment unit adjusts the cancelation signal generated according to the output signal from the output terminal, while inputting the carrier wave output by the first generation unit to the input terminal for a first period having a length such that the wireless tag is not activated.

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First Claim