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Time of arrival delay cancellations

  • US 9,702,970 B2
  • Filed: 04/28/2014
  • Issued: 07/11/2017
  • Est. Priority Date: 08/30/2013
  • Status: Active Grant
First Claim
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1. A transponder of a ranging system, comprising:

  • a signal receiver for receiving a challenge signal and a ranging signal from an interrogator, the ranging signal sent from the interrogator a time interval after the challenge signal;

    a signal processor for processing the challenge signal, generating a response signal in response to the challenge signal and storing the response signal; and

    a signal transmitter for sending the stored response signal in response to the ranging signal from the interrogator.

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