Radar device and operating method of radar device

A radar device comprising:

• a transmitting unit configured to radiate a transmission pulse;
• and
• a receiving unit configured to receive an echo pulse reflected from a target object,
• the receiving unit includes:
• a multi-receiving circuit AFE including a plurality of receiving circuits configured to amplify the echo pulse to output an amplified signals and an analog signal summing circuit configured to generate a summed signal based on the amplified signals;
• a sampling circuit configured to repeatedly perform a sampling operation on the summed signal to generate a plurality of sampling data;
• a signal integrator configured to generate integrated data for each of range cells based on the plurality of sampling data;
• a statistical signal converter configured to acquire noise statistical data based on the integrated data, and generate an extracted signal based on the noise statistical data;
• and
• an AFE controller configured to perform a characteristic verification operation on the noise statistical data, and adjust the summed signal based on a result of the characteristic verification operation.