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

Claim 13:
14. The receiver of claim 13, wherein when performing the carrier phase authentication procedure, the processor is further configured to:
wait a predefined time period in response to determining that the second value does not exceed the predefined carrier phase threshold;
during the predefined time period, the processor further configured to repeatedly:
measure a third double difference of a second carrier phase measurement of the signals;
determine whether a third value correspond to the third double difference of the second carrier phase measurement exceeds the predefined carrier phase threshold;

determine that the signals are authentic in response to determining that the third value exceeds the predefined carrier phase threshold; and
determine that the signals are the spoofing signals upon the predefined time period elapsing without determining that the third value exceeds the predefined carrier phase threshold.