US 12,461,249 B2
GNSS signal multipath detection device, and associated carrier geolocation system and multipath detection method
David Depraz, Valence (FR); and Christian Mehlen, Valence (FR)
Assigned to THALES, Courbevoie (FR)
Appl. No. 18/263,263
Filed by THALES, Courbevoie (FR)
PCT Filed Jan. 28, 2022, PCT No. PCT/EP2022/052011
§ 371(c)(1), (2) Date Jul. 27, 2023,
PCT Pub. No. WO2022/162127, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 21 00867 (FR), filed on Jan. 29, 2021.
Prior Publication US 2024/0118429 A1, Apr. 11, 2024
Int. Cl. G01S 19/22 (2010.01); G01S 19/39 (2010.01)
CPC G01S 19/22 (2013.01) [G01S 19/396 (2019.08)] 11 Claims
OG exemplary drawing
 
1. A GNSS signal multipath detection device for a GNSS receiver on-board a carrier, the carrier further comprising one or a plurality of antennas defining an apparent phase center and at least one plane of arrival of the GNSS signals, the or each antenna being apt to receive GNSS signals propagating along either direct or indirect paths and to transmit same to the GNSS receiver, the GNSS receiver being apt to supply an observable value determined from the signals received by the or each antenna;
the detection device comprising:
a movement generation module configured for generating a motion of the apparent phase center according to a predetermined control law;
a control module configured for determining the control law;
a prediction module configured for determining, at each instant, a prediction of the observable value provided by the GNSS receiver at the same instant, from the control law and directions of arrival of the direct paths of the GNSS signals with respect to the or each plane of arrival;
an anomaly detection module configured for detecting multipaths of GNSS signals received by the GNSS receiver, by comparing the observable value from the GNSS receiver with the corresponding prediction thereof.