Patent ID: 11959993
Assignee: TAKEMETUIT INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 22:
23. A receiver device comprising:
a transducer configured to receive acoustic frequency signals;
a filtering module configured for, for each of a plurality of beacon signals, filtering the received acoustic signals by the frequencies of a frequency pattern of the beacon signal to generate a filtered signal for the beacon signal;
a correlation module configured for, for each of the plurality of beacon signals, carrying out a rolling correlation in time of the filtered signal of the beacon signal with a version of the information component of the beacon signal;
a peak detector module configured for, for each of the plurality of beacon signals, identifying a correlation peak from the rolling correlation for the beacon signal, the correlation peak providing time-delay information for the beacon signal; and
a multilateration module configured for determining a position of the receiver based on the locations of each of a plurality of beacon devices associated to the beacon signals and the time-delay information determined for the beacon signals.