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ULTRASOUND-BASED LOCALIZATION OF CLIENT DEVICES WITH INERTIAL NAVIGATION SUPPLEMENT IN DISTRIBUTED COMMUNICATION SYSTEMS AND RELATED DEVICES AND METHODS

  • US 20150268327A1
  • Filed: 11/05/2014
  • Published: 09/24/2015
  • Est. Priority Date: 05/29/2012
  • Status: Active Grant
First Claim
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1. A client device configured to communicate in a distributed communication system, comprising:

  • a controller;

    an ultrasound receiver coupled to the controller, the ultrasound receiver configured to receive ultrasound pulses over at least one microphone; and

    a radio-frequency (RF) transceiver coupled to the controller, the RF transceiver configured to wirelessly receive and transmit RF communication signals over at least one antenna;

    an inertial navigation system (INS) operatively coupled to the controller;

    the controller configured to;

    calculate a position using received ultrasound signals; and

    use the INS to calculate a second position from the first position when the received ultrasound signals are below a predefined threshold.

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