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DISTANCE ESTIMATION

  • US 20110103517A1
  • Filed: 08/14/2007
  • Published: 05/05/2011
  • Est. Priority Date: 08/14/2007
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • enabling reception of an orthogonal frequency division multiplexed signal at a receiver, every first time, the orthogonal frequency division multiplexed signal comprising a plurality of sub-carriers;

    transforming a received orthogonal frequency division multiplexed signal in order to determine data from the sub-carriers of the received orthogonal frequency divisional multiplexed signal;

    comparing the data determined from the sub-carriers with reference data; and

    using the difference between the data determined from the sub-carriers and the reference data to estimate a correction to a multiple of the first time in order to determine a distance between the receiver and an origin of the orthogonal frequency division multiplexed signal.

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