US 11,899,133 B2
Method for determining at least one object information item of at least one target object which is sensed with a radar system, in particular of a vehicle, radar system and driver assistance system
Christian Sturm, Bietigheim-Bissingen (DE); Hamid Afrasiabi Vayghan, Bietigheim-Bissingen (DE); Yoke Leen Sit, Bietigheim-Bissingen (DE); and Gang Li, Bietigheim-Bissingen (DE)
Assigned to VALEO SCHALTER UND SENSOREN GMBH, Bietigheim-Bissingen (DE)
Appl. No. 17/258,003
Filed by Valeo Schalter und Sensoren GmbH, Bietigheim-Bissingen (DE)
PCT Filed Jun. 7, 2019, PCT No. PCT/EP2019/065001
§ 371(c)(1), (2) Date Jan. 5, 2021,
PCT Pub. No. WO2020/007573, PCT Pub. Date Jan. 9, 2020.
Claims priority of application No. 10 2018 116 378.9 (DE), filed on Jul. 6, 2018.
Prior Publication US 2021/0278501 A1, Sep. 9, 2021
Int. Cl. G01S 7/41 (2006.01); G01S 7/35 (2006.01); G01S 7/03 (2006.01); G01S 13/58 (2006.01); G01S 13/931 (2020.01)
CPC G01S 7/415 (2013.01) [G01S 7/03 (2013.01); G01S 7/356 (2021.05); G01S 13/584 (2013.01); G01S 13/931 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for determining at least one object information item of at least one target object which is sensed with a radar system of a vehicle, the method comprising:
transmitting transmission signals into a monitoring range of the radar system with at least three transmitters;
receiving echoes reflected at the at least one target object, of the transmission signals, as received signals with at least two receivers, wherein the received signals are converted into a form useable by an electronic control and/or evaluation device;
subjecting the received signals to at least one discrete Fourier transformation;
determining at least one target signal from the result of the at least one Fourier transformation;
determining at least one object information item from the at least one target signal;
generating, at the transmitter end, at least one first transmission signal, at least one second transmission signal, and at least one third transmission signal from a frequency-modulated continuous wave signal,
wherein the at least one second transmission signal and the at least one third transmission signal are encoded by phase modulations with respect to each other and with respect to the at least one first transmission signal, with the result that at least temporary signal orthogonality is brought about between the transmission signals,
wherein the at least one first transmission signal is transmitted with at least one first transmitter, and the at least one second transmission signal is transmitted with at least one second transmitter, and the at least one third transmission signal is transmitted with at least one third transmitter simultaneously into the monitoring range of the radar system, wherein the at least one second transmission signal is emitted with regular transmission pauses of a predefined length, and
wherein the received signals are subjected to at least one multi-dimensional discrete Fourier transformation, and
wherein at the receiver end, a plurality of target signals is determined both for all the receivers and individually for each receiver, from the result of the at least one multi-dimensional discrete Fourier transformation,
wherein, for each physically present target object, one of the target signals corresponds to the at least one first transmission signal, two of the target signals correspond to the at least one second transmission signal, and one of the target signals corresponds to the at least one third transmission signal.