Patent ID: 11906634
Assignee: NOVATEL INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. The computer implemented method of claim 8, wherein the channel distortion authentication procedure further comprises:
in response to determining that the second value does not exceed the predefined pseudorange threshold, waiting a predefined time period;
during the predefined time period, repeatedly:
measuring a third double difference of a second pseudorange measurement of the signals;
determining whether a third value corresponding to the third double difference of the second pseudorange measurement exceeds the predefined pseudorange threshold;
in response to determining that the third value exceeds the predefined pseudorange threshold, determining that the signals are the authentic navigation signals; and
upon the predefined time period elapsing without determining that the third value exceeds the predefined pseudorange threshold, determining that the signals are the spoofing signals.