Radar device and signal processing method

A radar device comprising:

• an extracting unit configured to extract history peak signals according to estimated peak signals, from a difference frequency between a transmission signal in which a frequency varies in a predetermined cycle and a reception signal obtained by receiving a reflected wave of a transmission wave based on the transmission signal from a target, in a first period in which the frequency of the transmission signal increases and a second period in which the frequency decreases;
• an estimating unit configured to estimate current peak signals as the estimated peak signals on the basis of previous peak signals extracted by the extracting unit;
• a pairing unit configured to pair the history peak signal of the first period and the history peak signal of the second period;
• a re-pairing unit configured to re-pair the history peak signals paired by the pairing unit, on the basis of peak signals existing in a predetermined range including the history peak signals paired by the pairing unit;
• and
• an information generating unit configured to generate information on the target on the basis of a result of the pairing of the pairing unit and a result of the re-pairing of the re-pairing unit.