Patent ID: 7522093

Claim:
A radar comprising: a transmitter that transmits a transmission signal having repetition of modulation intervals in which a frequency gradually changes in a predetermined frequency range with time; a receiver that receives a reflected signal of the transmission signal from a target; a frequency spectrum unit that obtains a frequency spectrum of a beat signal of the transmission signal and the reflected signal; a spike noise detector that detects whether spike noise is superimposed on the beat signal; a noise threshold setting unit that increases a noise threshold when superimposition of the spike noise is detected; and a detecting unit that detects information of the target based on data exceeding the noise threshold among data defining the frequency spectrum, wherein the noise threshold setting unit estimates a noise floor level of the frequency spectrum on the basis of a maximum absolute value of an amplitude of the spike noise included in the beat signal and sets a value obtained by adding a predetermined value to the noise floor level or a value obtained by multiplying the noise floor level by a predetermined coefficient as the noise threshold.