Patent ID: 9618604
Date: 2017-04-11
CPC Classifications: G01S

Claim:
1. A wireless positioning system, comprising: a plurality of fixed transmitters each of which transmits a unique audio localization signal, each fixed transmitter configured to transmit the audio localization signal via a first communication channel using one or more speaker devices associated with the fixed transmitter; and a fixed receiver for receiving the audio localization signals from the fixed transmitters, receiving locations of the fixed transmitters, determining phase offsets of the fixed transmitters, and transmitting phase offset and location data of the fixed transmitters to a mobile receiver as metadata via a second communication channel; wherein the mobile receiver is configured to receive the audio localization signals from the plurality of fixed transmitters, and to determine a location of the mobile receiver based at least in part on the received audio location signals and the phase offset and location data of the fixed transmitters provided by the fixed receiver.