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REAL-TIME METHOD AND SYSTEM FOR LOCATING A MOBILE OBJECT OR PERSON IN A TRACKING ENVIRONMENT

  • US 20120025973A1
  • Filed: 07/28/2010
  • Published: 02/02/2012
  • Est. Priority Date: 07/28/2010
  • Status: Active Grant
First Claim
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1. A real-time method of locating a mobile object or person in a tracking environment in which a plurality of sensors are located, the method comprising:

  • (a) providing a tracking tag wearable by the person or attachable to the object;

    (b) modulating a first carrier signal with a first packet including a first set of data to obtain a modulated first signal;

    (c) transmitting from the tag to a sensor nearest the tag the first signal, the first signal containing the first packet and having a first precision and a first range within the environment;

    (d) repeating steps (b) and (c) until a modulated second signal is received at the tag from the nearest sensor within a time period after step (c), the second signal containing a second packet including a second set of data and having a second precision and a second range within the environment;

    (e) receiving the second signal at the tag within the time period;

    (f) demodulating the second signal to obtain the second packet; and

    (g) determining location of the tag within the environment based on the second packet of the received demodulated second signal.

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