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Method and system for improving time of arrival (TOA) measurements in a wirless communication network

  • US 20070121679A1
  • Filed: 11/30/2005
  • Published: 05/31/2007
  • Est. Priority Date: 11/30/2005
  • Status: Active Grant
First Claim
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1. A method of estimating time of arrival (TOA) in an ad-hoc communications network, comprising the steps of:

  • sending a ranging message from a first node to a second node;

    receiving a signal at the second node;

    measuring the TOA of the received signal;

    correlating the received signal with a reference signal to obtain a measured correlation function;

    estimating a phase delay of the received signal utilizing the measured correlation function;

    constructing a reference correlation function based on the amplitude and the phase delay of the measured correlation function; and

    calculating a score based on similarities between the reference correlation function and the measured correlation function.

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