Patent ID: 11921223
Assignee: NOVATEL INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. The computer implemented method of claim 6, wherein carrier phase authentication procedure further comprises:
in response to determining that the second value does not exceed the predefined carrier phase threshold, waiting a predefined time period;
during the predefined time period, repeatedly:
measuring a third double difference of a second carrier phase measurement of the signals;
determining whether a third value corresponding to the third double difference of the second carrier phase measurement exceeds the predefined carrier phase threshold;
in response to determining that the third value exceeds the predefined carrier phase threshold, determining that the signals are authentic; and
upon the predefined time period elapsing without determining that the third value exceeds the predefined carrier phase threshold, determining that the signals are the spoofing signals.