Patent ID: 9244164
Filing Date: 2016-01-26
CPC Classification: G01S

Claim Text:
1. A method for unambiguous determination of a range to and of a relative velocity of an object with respect to a motor vehicle using a frequency-modulation continuous-wave radar in the motor vehicle, the method comprising: transmitting predetermined sequences of frequency-modulated signal pulses by the frequency-modulation continuous-wave radar in a measurement cycle; determining an unambiguity area (R defining mutually different unambiguity areas (R determining the range and the relative velocity on the basis of, in each case, at least one measured value for the range or for the relative velocity from each of the at least two successive measurement cycles; defining a tolerance band around every measured value for the range from a first measurement cycle of the at least two successive measurement cycles; determining whether the measured value for the range from a successive measurement cycle of the at least two successive measurement cycles is within the tolerance band; indicating an object located at the measured value for the range from the successive measurement cycle of the at least two successive measurement cycles if the measured value for the range from the successive measurement cycle of the at least two successive measurement cycles is determined to be within the tolerance band; and filtering out the measured value for the range from the successive measurement cycle of the at least two successive measurement cycles if the measured value for the range from the successive measurement cycle of the at least two successive measurement cycles is determined to be outside of the tolerance band, wherein the definition of different unambiguity areas (R wherein the definition of different unambiguity areas (V wherein mutually different pulse repetition frequencies (PRF) are set by variation of a time duration (T wherein the mutually different frequency shifts (f