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Train integrity and end of train location via RF ranging

  • US 8,918,237 B2
  • Filed: 03/15/2013
  • Issued: 12/23/2014
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. An end of train device, comprising:

  • a radio frequency transceiver that utilizes coherent phase frequency shift keyed modulation of radio frequency transmissions;

    at least one mechanism that monitors last car information and that is in communication with the radio frequency transceiver;

    a PLL counter and event timer in communication with the radio frequency transceiver, the PLL counter and event timer includes a radio frequency counter configured to count the number of cycles received in a radio frequency signal, a clock and a time stamp device.

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