Patent ID: 7242344
Filing Date: 2007-07-10
Classification: G01S

Abstract:
1. A radar apparatus in which a transmission wave based on a frequency modulated transmitted signal comprising an up modulation period and a down modulation period is irradiated onto a target, and a reflected wave from said target is received as a received signal, so that said target is detected by observing a beat signal generated by mixing said transmitted signal and said received signal, thereby measuring a distance or a relative speed to said target, said apparatus comprising: a distance and speed calculation section that calculates, as candidates for one target at the current observation, distances or relative speeds with respect to said one target by using a plurality of formulae; an prediction section that obtains an predicted distance calculation formula at the following observation from said distances or relative speeds calculated at the current observation; a correlation determination section that determines whether said distance calculation formula at the current observation is equal to said predicted distance calculation formula at the current observation predicted from the last observation; and a target selection section that outputs the calculation result of said distance and speed calculation section only when said prediction distance calculation formula at the current observation is equal to said predicted distance calculation formula predicted from the last observation.