Satellite positioning system spoofing mitigation

A mobile device comprising:

• at least one receiver configured to receive a first plurality of positioning signals and a second plurality of positioning signals;
• at least one memory;
• and
• at least one processor communicatively coupled to the at least one receiver and the at least one memory and configured to:
• measure the first plurality of positioning signals to determine active measurements of the first plurality of positioning signals;
• determine, based on the active measurements, a first conformance indicator that is indicative of how well the active measurements correspond to expected measurements of the first plurality of positioning signals;
• determine, based on the first conformance indicator and a second conformance indicator, whether any of the first plurality of positioning signals is spoofed, the second conformance indicator being indicative of how well previous measurements of the second plurality of positioning signals, made before the active measurements of the first plurality of positioning signals, corresponded to previously-expected measurements of the second plurality of positioning signals;
• and
• determine position information of the mobile device using the active measurements of the first plurality of positioning signals other than any of the active measurements corresponding to a respective one of the first plurality of positioning signals determined to be spoofed.

A mobile device comprising:

• means for measuring a first plurality of positioning signals to determine active measurements of the first plurality of positioning signals;
• means for determining, based on the active measurements, a first conformance indicator that is indicative of how well the active measurements correspond to expected measurements of the first plurality of positioning signals;
• means for determining, based on the first conformance indicator and a second conformance indicator, whether any of the first plurality of positioning signals is spoofed, the second conformance indicator being indicative of how well previous measurements of a second plurality of positioning signals, made before the active measurements of the first plurality of positioning signals, corresponded to previously-expected measurements of the second plurality of positioning signals;
• and
• means for determining position information of the mobile device using the active measurements of the first plurality of positioning signals other than any of the active measurements corresponding to a respective one of the first plurality of positioning signals determined to be spoofed.