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Real-time locating system and method using timing signal

  • US 20020181565A1
  • Filed: 05/03/2002
  • Published: 12/05/2002
  • Est. Priority Date: 05/04/2001
  • Status: Active Grant
First Claim
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1. A location system comprising:

  • a plurality of signal readers for receiving signals from a wireless transmitter to be located, said signals comprising a wideband, spread spectrum signal and a timing marker appended a predetermined time in front of the wideband, spread spectrum signal for indicating the presence of the wideband, spread spectrum signal; and

    a location processor operatively coupled to said signal readers for detecting the timing markers of signals and responsive to a detection of a timing marker, correlating a signal as a first-to-arrive signal and conducting differentiation of first-to-arrive signals to locate a wireless transmitter.

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