US Patent 11061127 Vehicle radar system

A vehicle radar system including at least one transceiver arrangement (52) that is arranged to generate and transmit a least one FMCW chirp signal (4a, 4b). Each chirp signal (4a, 4b) includes a corresponding plurality of frequency ramps (r1, r2). The vehicle radar system (3) is arranged to receive reflected signals (5a, 5b) and to mix the received signals (5a, 5b) with the respective transmitted chirp signal (4a, 4b) to obtain at least one IF signal (14). The vehicle radar system (3) is further arranged to produce a periodically updated dwell list (34), and to collect and process data in dependence of the present dwell list (34). The present dwell list includes information where the probability of presence of objects exceeds a certain threshold.