Radar apparatus

A radar device comprising:

• a trigger pulse generator which generates a trigger pulse of a predetermined width at a predetermined period;
• a transmitter which emits into an intended search space a radar wave having a predetermined frequency pulse-modulated by the trigger pulse from the trigger pulse generator;
• a receiver which receives a reflected wave of the radar wave emitted by the transmitter and outputs a receive signal;
• a delay unit which delays the trigger pulse from the trigger pulse generator by a predetermined delay time;
• a local pulse generator which outputs a local pulse signal having the predetermined frequency pulse-modulated by the trigger pulse delayed by the predetermined delay time by the delay unit;
• a correlation value detector which determines a strength correlation value between the receive signal output from the receiver and the local pulse signal output from the local pulse generator;
• a delay time changing unit which sequentially changes the predetermined delay time of the delay unit within a range of the predetermined period representing a generation period of the trigger pulse generated by the trigger pulse generator;
• a correlation value storage unit which stores the strength correlation value detected by the correlation value detector for each delay time changed by the delay time changing unit;
• a frequency distribution generator which generates a frequency distribution of the strength correlation value stored in the correlation value storage unit with respect to the delay time;
• and
• a search control unit which executes an analyzation for the intended search space based on the frequency distribution generated by the frequency distribution generator.