Patent ID: 8780954

Claim:
A wireless communication apparatus configured to perform time-division wireless communication with another wireless communication apparatus using a frequency hopping method, the wireless communication apparatus comprising: a communication control unit configured to select one frequency channel from a plurality of frequency channels and configured to switch the frequency channel to be selected as time passes; a transmitting unit configured to transmit a transmission signal of the selected frequency channel to the other wireless communication apparatus; a receiving unit configured to receive a reception signal of the selected frequency channel from the other wireless communication apparatus; and an oscillator configured to provide a local signal to the transmitting unit and the receiving unit, wherein the receiving unit comprises an interference wave detection circuit configured to detect an interference wave signal of a detection frequency, the interference wave signal is included in an input signal received during an interference wave detection period, and in the interference wave detection period, the reception signal is not received, and the communication control unit is configured to mask a frequency channel related to the detection frequency among the plurality of frequency channels to create a frequency channel map, the interference wave signal is detected at the detection frequency by the interference wave detection circuit, and the communication control unit does not select the masked frequency channel, wherein the communication control unit controls the oscillator so that a frequency of the local signal changes sequentially during the interference wave detection period, and the interference wave detection circuit sequentially changes the detection frequency according to the frequency of the local signal.