A method and a radar sensor for transmitting frequency-modulated
transmitted signals and receiving partial waves reflected by objects in
the sensor detection range. A frequency shift of the received signal
relative to the transmitted signal is determined for each object
reflecting in each frequency ramp, it being possible to determine the
relative speeds and the distances of the detected objects from the
combination of frequency shifts of a plurality of ramps. The objects
detected in preceding measurement cycles are stored in a memory, their
relative speed and their distance being computed in advance for a future
measurement cycle. The expected frequency shifts are determined and the
frequency shifts of a plurality of ramps are combined in order to
determine the relative speeds and the distances for objects that have not
yet been stored in the memory.