Wireless communication device and abnormality detection method

An abnormality detection method for a wireless communication device that includes a transmitting circuit that is connected to an antenna and includes a power amplifier that amplifies an input signal and a receiving circuit that is connected to the antenna and includes a switch that switches as to whether or not a signal is received, the abnormality detection method comprising:

• acquiring, by a processor, timing information that indicates timing of a guard period when no signal is transmitted or received by the antenna;
• turning on the power amplifier and turning on the switch in the guard period, by the processor, based on the acquired timing information to input a noise signal of the transmitting circuit that is amplified by the power amplifier to the receiving circuit;
• measuring, by the processor, electrical power of a signal that is output from the receiving circuit in the guard period;
• and
• determining, by the processor, abnormality of the receiving circuit based on the measured electrical power.