Wireless communication apparatus

A radio communication device comprising:

• a receiver for receiving data;
• a radiation detector for detecting electromagnetic interference (EMI) radiation from the data received by the receiver;
• a timing detector for detecting a stopping time of EMI radiation;
• a controller for changing a normal communication mode into an avoidance communication mode in response to EMI radiation detected by the radiation detector;
• a transmitter for preparing a transmission packet in the avoidance communication mode so as to satisfy expressions of T1=(T0/2)/M and T2=T0/2 (where T1 represents a time required for transmission;
• T2 represents a cycle of transmission;
• T0 represents a cycle of an AC power source;
• and M≧4);
• a transmission power changer for determining a transmission power of the transmission packet in the avoidance communication mode by multiplying T2/T1 to a transmission power in the normal communication mode;
• and
• a transmission rate changer for determining a transmission rate of the transmission packet in the avoidance communication mode by multiplying T2/T1 to a transmission rate in the normal communication mode,
• wherein, the transmitter transmits the transmission packet so as to be synchronized with the stopping time of EMI radiation.