Method for determining at least one object information of at least one target object, which is detected by a radar system, in particular of a vehicle, radar system and driver assistance system

摘要

A method for determining at least one object information of at least one target object (18) that is detected by a radar system (12), in particular of a vehicle (10), a radar system (12) and a driver assistance system (20) are described. In the method, transmission signals (32a, 32b) are transmitted to a monitoring area (14) of the radar system (12) with at least one transmitter (26a, 26b). With at least one receiver (30), echoes of the transmission signals (32a, 32b) reflected at the at least one target object (18) are received as received signals (34a, 34b) and, if necessary, in an electronic control and / or evaluation device (28). brought usable shape. The received signals (34a, 34b) are subjected to at least one multi-dimensional discrete Fourier transformation. At least one target signal is determined from the result of the at least one Fourier transformation. At least one object information is determined from the at least one target signal. At least one first transmit signal (32a) and at least one second transmit signal (32b) are generated on the transmitter side from a frequency-modulated continuous wave signal. The at least one second transmit signal (32b) is coded by means of a phase modulation with respect to the at least one first transmit signal (32a), so that an at least temporary signal orthogonality between the at least one first transmit signal (32a) and the at least one second transmit signal (32b) is achieved , The at least one first transmission signal (32a) is transmitted with at least one first transmitter (26a) and the at least one second transmission signal (32b) is transmitted with at least one second transmitter (26b) simultaneously into the monitoring area (14) of the radar system (12). The at least one second transmission signal (32b) is transmitted with regular transmission pauses of predetermined length.