Patent ID: 8436764

Claim:
A method for operating a radar sensor, comprising: emitting a continuous radar signal having varying frequency, the frequency changing according to a cyclically repeated modulation sequence of a number n of successive linear frequency ramps having different slopes a n , mixing a received radar signal reflected from an object with the emitted radar signal to form an intermediate frequency signal (ZF), analyzing the intermediate frequency signal (ZF) with respect to its frequency spectrum while going through each of the n frequency ramps, peaks occurring in the frequency spectra of the intermediate frequency signal (ZF) each corresponding to one ambiguity line (MG) in a distance/velocity space ( 30 ), the slope of each ambiguity line (MG) being a function of the slope a n of the respective frequency ramp, determining positions (d, v r ) of possible objects at intersection points of the ambiguity lines (MG), and precalculating the expected position (d′, v r ′) the possible objects will have at the point in time of a repetition of the modulation sequence, wherein the slope a n of at least one of the frequency ramps is established for a subsequent modulation sequence in such a way that none of the expected positions (d′, v r ′) of a possible object in the distance/velocity space is at an intersection point of precalculated ambiguity lines (MG′) of the other possible objects.