Patent ID: 7456937

Claim:
A radar apparatus comprising: radar means configured for irradiating a transmitting wave in a given angle area, receiving a reflected wave of the transmitting wave reflected by a reflective object, and outputting a receiving signal corresponding to an intensity of the reflected wave; A/D converting means configured for sampling the receiving signal at a predetermined sampling frequency and converting the sampled receiving signal into a digital signal; peak center estimating means configured for estimating a peak center generation time in the receiving signal by using a plurality of digital signals produced by the A/D converting means; estimate error correcting means configured for correcting an estimate error of a peak center estimate time indicative of the peak center generation time and producing a corrected peak center estimate time, the estimate error being caused by deviation of the peak center generation time in the receiving signal outputted from the radar means from sampling time of the A/D converting means; and distance calculating means configured for calculating a distance to the reflective object on the basis of the corrected peak center estimate time that is estimated by the peak center estimating means and corrected by the estimate error correcting means.