Systems and methods for multicarrier phase-based localization

A location management server configured to:

• for each transceiver in a set of transceivers:
• access a time-of-arrival of a multicarrier uplink signal, the time-of-arrival calculated by:
• accessing a multicarrier reference signal;
• receiving the multicarrier uplink signal:
• comprising a subcarrier uplink signal for each subcarrier frequency in a set of subcarrier frequencies;
• for each subcarrier frequency in the set of subcarrier frequencies:
• generating a set of adjusted phase differences by adjusting a phase difference between a subcarrier uplink signal for the subcarrier frequency and the reference subcarrier signal for the subcarrier frequency by a phase offset;
• and
• calculate the time-of-arrival of the multicarrier uplink signal based on the set of adjusted phase differences;
• and
• calculate an uplink location estimate of a user device based on a set of time-differences-of-arrival, derived from the time-of-arrival of the multicarrier uplink signal at each transceiver, and a location of each transceiver in the set of transceivers.

A location management server configured to:

• for each transceiver in a set of transceivers:
• access a time-of-arrival of a multicarrier uplink signal transmitted from a user device, the time-of-arrival calculated by:
• receiving the multicarrier uplink signal:
• comprising a subcarrier uplink signal for each subcarrier frequency in a set of subcarrier frequencies;
• for each subcarrier frequency in the set of subcarrier frequencies:
• calculating a phase difference between each subcarrier uplink signal and a corresponding subcarrier reference signal;
• calculating a phase offset based on the subcarrier frequency and a calibration function for the transceiver;
• generating an adjusted phase difference in a set of adjusted phase differences, for the multicarrier uplink signal based on the phase difference and the phase offset;
• and
• calculating the time-of-arrival of the multicarrier uplink signal based on the set of adjusted phase differences;
• and
• calculate an uplink location estimate for a user device based on a set of time-differences-of-arrival, derived from the time-of-arrival of the multicarrier uplink signal, and a known location of each transceiver in the set of transceivers.