According to one embodiment, an electronic apparatus includes transmitter circuitry and processing circuitry. The transmitter circuitry transmits a first transmission signal during a first period via a transmission frequency band defined by a first wireless communication standard. The processing circuitry performs carrier sensing in a first frequency band during a second period following the first period. The transmitter circuitry further transmits, if a wireless signal is not detected in the carrier sensing, a second transmission signal during a third period following the second period. The processing circuitry performs, if the wireless signal is detected in the carrier sensing, carrier sensing in the first frequency band during a fourth period following the second period.