Patent ID: 11867826
Assignee: SONITOR TECHNOLOGIES AS
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A computer-implemented method, comprising:
receiving, by a mobile receiving unit, an acoustic signal from a transmitting device via a plurality of transmission paths, wherein the acoustic signal comprises one of a plurality of code keys;
correlating the acoustic signal with a magnitude block window to determine a signal peak;
deconvolving the signal peak with each of the plurality of code keys to yield a set of valid code keys from the plurality of code keys, wherein the plurality of code keys comprise Quadrature Phase Shift Keying (QPSK)-encoded Complementary-Code-Keying (CCK) codes;
determining a first likelihood of correctness for each valid code key based on at least one parameter associated with the acoustic signal;
determining a second likelihood of correctness for each valid code key based on a time of arrival;
identifying a code key associated with an identity of the transmitting device based on a joint likelihood of correctness based on the first likelihood of correctness and the second likelihood of correctness; and
determining a location of the mobile receiving unit using the identity of the transmitting device.