US 12,306,321 B2
Method and system for determining the position of at least one object
Christian Grewing, Jülich (DE); Christian Roth, Düsseldorf (DE); -Ing. Markus Robens, Aachen (DE); and Alessandra Lai, Aachen (DE)
Assigned to Forschungszentrum Jülich GmbH, (DE)
Appl. No. 17/908,807
Filed by Forschungszentrum Jülich GmbH, Jülich (DE)
PCT Filed Jan. 12, 2021, PCT No. PCT/EP2021/050446
§ 371(c)(1), (2) Date Sep. 1, 2022,
PCT Pub. No. WO2021/175502, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 102020202642.4 (DE), filed on Mar. 2, 2020.
Prior Publication US 2023/0101932 A1, Mar. 30, 2023
Int. Cl. G01S 5/02 (2010.01)
CPC G01S 5/0246 (2020.05) [G01S 5/0221 (2013.01); G01S 5/0226 (2013.01); G01S 5/0295 (2020.05)] 20 Claims
OG exemplary drawing
 
1. A method for position determination of at least one object in which at least four transmitters transmit circularly polarized signals and a receiver to be localized receives the circularly polarized signals, wherein a polarization rotation direction at each transmitter and receiver is the same, wherein at least two transmitters transmit periodic signals of different frequencies, these frequencies being closely adjacent such that the closely adjacent frequencies are less than one bandwidth of the transmitted signals apart, wherein the receiver is configured to identify and disregard signals with a signal strength below a predetermined threshold value.