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

Claim 16:
17. The system of claim 12, further comprising a receiver device having:
a transducer configured to receive acoustic frequency signals;
a filtering module configured for, for each of a plurality of beacon signals transmitted from a working subset of at least three of the plurality of differently located beacon devices, 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 beacon device of the working subset of beacon devices and the time-delay information of the beacon signals received from the working subset of beacon devices.