Patent ID: 11968597
Assignee: ZAINAR, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 16:
17. A method comprising:
for each transceiver in a set of transceivers:
receiving a multicarrier uplink signal from a device, the multicarrier uplink signal comprising a set of subcarrier uplink signals for a set of subcarrier frequencies;
accessing a multicarrier reference signal indicative of the device, the multicarrier reference signal:
characterizing a set of subcarrier reference signals for the set of subcarrier frequencies;

for a subcarrier frequency in the set of subcarrier frequencies:
calculating a phase difference between the subcarrier uplink signal for the subcarrier frequency and a subcarrier reference signal for the subcarrier frequency;
calculating a phase offset based on the subcarrier frequency; and
calculating an adjusted phase difference, in a set of adjusted phase differences, based on the phase difference and the phase offset; and

calculating a time-of-arrival estimate, in a set of time-of-arrival estimates, based on the set of adjusted phase differences; and

calculating a time-of-arrival of the multicarrier uplink signal based on the set of time-of-arrival estimates.