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TDOA/GPS hybrid wireless location system

  • US 20050148346A1
  • Filed: 12/30/2003
  • Published: 07/07/2005
  • Est. Priority Date: 12/30/2003
  • Status: Active Grant
First Claim
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1. A method for the determination of the location of a mobile station (MS) equipped with embedded GPS signal reception capability and equipped to operate within a wireless communications network, the method comprising:

  • (a) receiving GPS data at a land station, said GPS data being received from a MS to be located;

    (b) at a land station equipped with location-measurement facilities, receiving a communications-band signal from said MS to be located and using the location-measurement facilities to extract location-related characteristic data from the communications-band signal; and

    (c) at a land station equipped for location-determination calculations, performing location-determination calculations using the GPS data and the extracted location-related characteristic data to derive an estimated location for the MS.

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