Method and apparatus for continuous wave frequency modulation radar detection with range-velocity ambiguity resolution

摘要

The invention relates to a process and a device for detecting radar with frequency modulation to a continuous wave with a removal of ambiguity between the distance and the vitesse.le radar emits at least, alternately, two ramps (32, 33) which are parallel and discontinuous frequency modulation is slightly offset by a variation in frequency (deltaf), the frequency of the switching of a ramp to the other at the end of a given period (tf), the distance of a detected target is estimated as a function of the phase difference (deltaphi) between a received signal (s1 (t)) (t)) corresponding to the first ramp (32) and a signal received (s2 (t)) corresponding to the second ramp (33), the speed of the target being obtained from the estimated distance and of the ambiguity straight line associated with the cible.application: especially radars for automobiles.