The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2022
Filed:
Aug. 02, 2019
Thales Management & Services Deutschland Gmbh, Ditzingen, DE;
Sébastien Bomart, Strasbourg, FR;
André Schüttpelz, Sachsenheim, DE;
Arberita Kusari, Stuttgart, DE;
Frieder Beck, Kirchheim unter Teck, DE;
Ulrich Kälberer, Stuttgart, DE;
THALES MANAGEMENT & SERVICES DEUTSCHLAND GMBH, Ditzingen, DE;
Abstract
A test metric for satellite sent GNSS code signals is proposed, wherein a signal sent by each satellite i is received at different GNSS receivers, and bias-removed, averaged over the receivers and normalized measurement values are derived out of autocorrelation function values. A correlation matrix Ris built from a matrix Xcontaining the measurement values in the form of measurement value vectors {right arrow over (X)}from the present time epoch tand from previous time epochs twith k=1, . . . , n−1, wherein a principal component analysis is done of matrix R, wherein a transformed vector {right arrow over (T)}=PC·{right arrow over (X)}is calculated, with PCcontaining at least two eigenvectors having the largest eigenvalues of all eigenpairs. A signal quality monitor test metric SQMis built from the square sum of the entries of transformed vector {right arrow over (T)}, and if SQMis larger than a threshold THR, the satellite signals are disallowed for position determination at all GNSS receivers.