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Radio frequency communication system

  • US 10,534,067 B2
  • Filed: 07/01/2019
  • Issued: 01/14/2020
  • Est. Priority Date: 08/24/2012
  • Status: Active Grant
First Claim
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1. A method of tracking a position of a radiofrequency (RF)-transmitting device based on RF signals transmitted by the RF-transmitting device, comprising the steps of:

  • calculating a present position of a RF-transmitting device based on RF signals transmitted by the RF-transmitting device;

    determining the present position of the RF-transmitting device is an invalid position when a distance between the present position of the RF-transmitting device and a previous position of the RF-transmitting device exceeds a tolerance value that varies according to a velocity of the RF-transmitting device;

    recalibrating, in response to determining the present position of the RF-transmitting device is an invalid position, the present position of the RF-transmitting device by;

    obtaining data from RF signals transmitted by the RF-transmitting device; and

    identifying a plurality of candidate position solutions;

    evaluating at least one of the plurality of candidate position solutions against the obtained data to search for an acceptable candidate position solution; and

    when the evaluating finds an acceptable candidate position solution, tracking the RF-transmitting device using the acceptable candidate position solution as the present position of the RF-transmitting device.

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