Please download the dossier by clicking on the dossier button x
×

Methods and systems for determining the location of an electronic device

  • US 7,800,541 B2
  • Filed: 03/31/2008
  • Issued: 09/21/2010
  • Est. Priority Date: 03/31/2008
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of determining a location of an electronic device, the method comprising:

  • transmitting one or more signals between a first electronic device at an unknown location and three or more electronic devices at three or more corresponding known locations, wherein the one or more signals each includes a plurality of simultaneous tones having different frequencies;

    determining at least one first phase difference between at least two tones having a first frequency difference in the one or more signals accumulated during transmission between the first electronic device at the unknown location and a first electronic device of said three or more electronic devices;

    determining at least one second phase difference between at least two tones having a second frequency difference in the one or more signals accumulated during transmission between the first electronic device at the unknown location and a second electronic device of said three or more electronic devices;

    determining at least one third phase difference between at least two tones having a third frequency difference in the one or more signals accumulated during transmission between the first electronic device at the unknown location and a third electronic device of said three or more electronic devices; and

    determining the location of said first electronic device at the unknown location using said first, second, and third phase differences and said first, second, and third frequency differences.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×