Patent ID: 7312745

Claim:
A radar comprising: a transmitter transmitting a transmission signal having an alternately repeating upstream-modulation section in which a frequency gradually increases and a downstream-modulation section in which the frequency gradually decreases; a receiver receiving a reception signal serving that is a reflection signal of the transmission signal reflected from a target; an analyzer acquiring data on a frequency spectrum of a beat signal for the transmission signal and the reception signal; an extractor extracting, from among a plurality of first projecting portions appearing in the frequency spectrum of the beat signal in the upstream-modulation section and a plurality of second projecting portions appearing in the frequency spectrum of the beat signal in the downstream-modulation section, a pair of projecting portions resulting from reflection of the transmission signal by the target; and a detector detecting a distance to the target and a relative speed with respect to the target in accordance with frequencies of the extracted pair of projecting portions, wherein the extractor further predicting a center frequency of peak frequencies of the first and second projecting portions at a point in time after a predetermined time based on a peak frequency of the first projecting portion at the predetermined time, and extracting the pair of projecting portions acquired at the point in time in accordance with the center frequency.