Patent ID: 7248205
Filing Date: 2007-07-24
Classification: G01S

Abstract:
1. 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.