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Method and apparatus for locating a transmitter of a diffuse infrared signal within an enclosed area

  • US 5,903,373 A
  • Filed: 11/14/1997
  • Issued: 05/11/1999
  • Est. Priority Date: 07/03/1996
  • Status: Expired due to Fees
First Claim
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1. A method of locating a portable remote station transceiving a diffuse infrared communicated signal within an enclosed area containing a plurality of stationary infrared transceivers interconnected with a central controller, such method comprising the steps of:

  • detecting a particular transmission of the diffuse infrared communicated signal from the portable remote station within the enclosed area by the plurality of stationary transceivers;

    measuring a parametric value of the particular signal received by each stationary transceiver of the plurality of stationary transceivers; and

    locating the portable remote station by triangulation based upon differences in the parametric value measured by at least two of the plurality of stationary transceivers.

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