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METHOD AND APPARATUS FOR LOCATING A MOBILE DEVICE

  • US 20170350958A1
  • Filed: 08/25/2017
  • Published: 12/07/2017
  • Est. Priority Date: 06/03/2015
  • Status: Active Grant
First Claim
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1. A method for locating a mobile device, said method comprising:

  • periodically transmitting radio signals via a transmitter;

    utilizing said radio signals to time synchronize a mobile device;

    transmitting a modulated ultrasound signal via said transmitter, wherein said modulated ultrasound signal includes at least one symbol configured for pulse compression;

    in response to the receipt of a demodulated ultrasound signal sent from said mobile device, wherein said demodulated ultrasound signal is derived from said modulated ultrasound signal, extracting transmitter identifier and timing information from said demodulated ultrasound signal;

    determining a location of said transmitter based on said transmitter identifier information; and

    determining a location of said mobile device based on said timing information and said determined location of said transmitter.

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