Multipath mitigation for multiband GNSS receiver

A method of position determination at a mobile device, the method comprising:

• obtaining a set of satellite signal measurements through measuring, for each satellite in a first plurality of satellites, a first signal from the satellite in a first frequency band and a second signal from the satellite in a second frequency band, wherein the first plurality of satellites includes at least a first satellite, a second satellite, and a third satellite;
• determining that at least one measurement in the set of satellite signal measurements is impaired, based on a difference between a measurement of the first signal from a particular satellite and a measurement of the second signal from the particular satellite;
• determining an observed ionospheric delay based on the difference;
• and
• determining that the measurement of the first signal from the particular satellite or the measurement of the second signal from the particular satellite is impaired through comparing the observed ionospheric delay to an expected ionospheric delay.

A wireless device comprising:

• a wireless receiver configured to receive satellite signals from at least a first plurality of satellites, the satellite signals including, for each satellite in the first plurality of satellites, a first signal from the satellite in a first frequency band and a second signal from the satellite in a second frequency band, wherein the first plurality of satellites includes at least a first satellite, a second satellite, and a third satellite;
• a memory;
• and
• one or more processing units communicatively coupled with the wireless receiver and the memory, the one or more processing units configured to:
• obtain a set of satellite signal measurements corresponding to measurements of the satellite signals received by the wireless receiver;
• determine that at least one measurement in the set of satellite signal measurements is impaired, based on a difference between a measurement of the first signal from a particular satellite and a measurement of the second signal from the particular satellite, wherein, to determine that the at least one measurement in the set of satellite signal measurements is impaired, the one or more processing units are configured to determine that the difference exceeds one or more thresholds, and wherein the one or more thresholds include a first threshold associated with the first signal from the particular satellite and a second threshold associated with the second signal from the particular satellite;
• and
• determine a position of the wireless device based on non-impaired measurements in the set of satellite signal measurements.

A wireless device comprising:

• a wireless receiver configured to receive satellite signals from at least a first plurality of satellites, the satellite signals including, for each satellite in the first plurality of satellites, a first signal from the satellite in a first frequency band and a second signal from the satellite in a second frequency band, wherein the first plurality of satellites includes at least a first satellite, a second satellite, and a third satellite;
• a memory;
• and
• one or more processing units communicatively coupled with the wireless receiver and the memory, the one or more processing units configured to:
• obtain a set of satellite signal measurements corresponding to measurements of the satellite signals received by the wireless receiver;
• determine that at least one measurement in the set of satellite signal measurements is impaired, based on a difference between a measurement of the first signal from a particular satellite and a measurement of the second signal from the particular satellite;
• determine an observed ionospheric delay based on the difference;
• determine that the measurement of the first signal from the particular satellite or the measurement of the second signal from the particular satellite is impaired through comparing the observed ionospheric delay to an expected ionospheric delay;
• and
• determine a position of the wireless device based on non-impaired measurements in the set of satellite signal measurements.

A non-transitory computer-readable medium storing instructions therein for execution by one or more processing units, comprising instructions to:

• obtain a set of satellite signal measurements through measuring, at a mobile device and for each satellite in a first plurality of satellites, a first signal from the satellite in a first frequency band and a second signal from the satellite in a second frequency band, wherein the first plurality of satellites includes at least a first satellite, a second satellite, and a third satellite;
• determine that at least one measurement in the set of satellite signal measurements is impaired, based on a difference between a measurement of the first signal from a particular satellite and a measurement of the second signal from the particular satellite, wherein, to determine that the at least one measurement in the set of satellite signal measurements is impaired, the non-transitory computer-readable medium further comprises instructions to determine that the difference exceeds one or more thresholds, and wherein the one or more thresholds include a first threshold associated with the first signal from the particular satellite and a second threshold associated with the second signal from the particular satellite;
• and
• determine a position of the mobile device based on non-impaired measurements in the set of satellite signal measurements.