A base station includes a transmitter configured to transmit a downlink signal to a terminal device in a first frequency band, a receiver configured to receive an uplink signal from the terminal device in a second frequency band narrower than the first frequency band, at least a part of the second frequency band being included in the first frequency band, and a canceller circuit configured to execute a suppression process of a self-interference in which the downlink signal transmitted from the transmitter reaches the receiver and interferers with the uplink signal, wherein the canceller circuit executes the suppression process by limiting to a third frequency band including the second frequency band and not including at least a part of the first frequency band.
