Patent ID: 6970129

Claim:
A radar apparatus comprising: peak detection means for detecting a peak frequency component, whose signal intensity shows a peak, from a beat signal obtained by mixing a transmitted signal of a radar wave, having a rising section where its frequency increases gradually and a falling section where its frequency decreases gradually, and a received signal of the radar wave reflected from a target; peak pair extraction means for extracting, from temporary peak pairs obtained by arbitrarily combining peak frequency components in the rising section detected by said peak detection means and peak frequency components in the falling section detected thereby, a temporary peak pair comprising a pair of peak frequency components based on reflected waves from the same target as a peak pair, with information about a target specified by said peak pair extracted by said peak pair extraction means being obtained in each predetermined measurement cycle; estimation means for obtaining each of estimated values of a pair of peak frequency components to be detected in the present measurement cycle with respect to each of previous-cycle targets specified in a previous measurement cycle; decision means for, when only the peak frequency component corresponding to one of the pair of estimated values is detected by said peak detection means, making a decision as to whether the other estimated value satisfies a predetermined extrapolation condition; and extrapolation means for, when said decision means shows that the other estimated value satisfies said extrapolation condition, making a peak pair extrapolation on the assumption that a peak pair corresponding to said previous-cycle target is detected as the estimated values obtained by said estimation means.