Patent ID: 11906633
Assignee: NOVATEL INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A computer implemented method comprising the steps of:
receiving a set of navigation system (NS) signals at a plurality of antennas;
for each NS signal of the set of NS signals, obtaining a carrier to noise density measurement;
performing double differencing of each of the obtained carrier to noise density measurements, wherein each possible double difference case is performed on the obtained carrier to noise density measurements;
determining whether the double difference of each of the carrier to noise density measurements exceeds a second predefined threshold; and
for each of the carrier to noise density measurements where the double difference exceeds the second predefined threshold, labeling the NS signal associated with the carrier to noise density measurement as authentic; and
in response to at least a predefined number of NS signals of the set of NS signals being labeled as authentic, determining position using the set of NS signals.