Radar detection device used in wireless communication device

A radar detection device comprising:

• a count section which increments a count value of a radar detection counter, based on a first value, a second value, and a third value, when a difference value between the latest first value and the first value before a first time is not lower than a first threshold while the second value and the third value are lower than a second threshold corresponding to the second value and a third threshold corresponding to the third value, the first value indicating the number of receiving times of a received signal that is neither in conformity with a predetermined standard nor an OFDM signal, the second value indicating a value of a digital RSSI signal when first-time automatic gain control is performed in a recent received frame, the third value indicating a value of RSSI in the latest received frame;
• and
• a detection section which determines whether a difference value between the latest value of the radar detection counter and a value of the radar detection counter before a third time is not lower than a fourth threshold in each of passage of a second time, and determines that radar is detected when the difference value is not lower than the fourth threshold.

A radar detection device comprising:

• a count section which obtains the number of receiving times of a received signal that is neither in conformity with a predetermined standard nor an OFDM signal;
• and
• a detection section which determines whether a difference value between the latest number of receiving times and the number of receiving times before a predetermined time is not lower than a predetermined threshold, and determines that radar is detected when the difference value is not lower than the threshold.