METHOD AND DEVICE FOR RADAR DETECTION WITH CONTINUOUS WAVE FREQUENCY MODULATION HAVING AMBIGUOUS RISE BETWEEN DISTANCE AND SPEED

摘要

The invention relates to a continuous wave frequency modulation radar detection method and device having ambiguity resolved between distance and speed. The radar emits at least two parallel ramps (32, 33) alternately and frequency modulation discontinues slightly offset by a frequency variation (DeltaF),, the frequency switching from one ramp to another at the end of a given duration (Tf), the distance from a detected target being estimated as a function of the phase difference (Deltaphi) between a received signal (S1 (t)) (t)) corresponding to the first ramp (32) and a received signal (S2 (t)) corresponding to the second ramp (33) , the speed of the target being obtained from the estimated distance and the ambiguity line associated with the target.Application: notably speed cameras for cars. /P