Patent ID: 9702967
Date: 2017-07-11
CPC Classifications: G01S

Claim:
1. A method for setting a detection threshold for a received signal of a frequency-modulated continuous-wave radar sensor of a motor vehicle, in which: in successive measuring cycles of the radar sensor in each case a radar signal is emitted into a capture zone of the radar sensor and a radar signal reflected in the capture zone is received as a received signal by the radar sensor, in each measuring cycle a frequency spectrum relating to the respective received signal is determined, wherein individual frequency bins of the frequency spectrum each correspond to a signal level in a range-resolution cell of the radar sensor, and in each measuring cycle the detection threshold is set individually in each case for a subset composed of at least one frequency bin, and in order to set the detection threshold for the respectively current subset a noise level of the frequency spectrum is determined and the detection threshold is set as a function of the noise level, wherein in order to set the detection threshold for the current subset the noise level is determined from frequency bins of temporally preceding measuring cycles and/or from frequency bins of adjacent Doppler-resolution cells of the frequency spectrum.