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SYSTEM AND METHOD FOR LOCATING A POINT IN SPACE

  • US 20130016011A1
  • Filed: 02/20/2012
  • Published: 01/17/2013
  • Est. Priority Date: 07/13/2011
  • Status: Active Grant
First Claim
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1. A method for locating a point in a first region based on receipt of a radio frequency (rf) signal that emanates from the point, comprising:

  • providing an antenna array in the first region at a first position and rotatable about a first axis;

    providing a series of phase-array patterns for implementation with the antenna array to provide measures of rf signal strength;

    using each phase-array pattern to provide a plurality of phase-array signal strength reference values as a function of angle of rotation about the first axis;

    with the antenna array at the first position, further using a plurality of the phase-array patterns to acquire a plurality of rf signal strength values, each value based on reception of the rf signal that emanates from the point;

    determining a set of correlation values where each value is a correlation between (i) signal strength reference values acquired with patterns in the series at one of the angles and (ii) the rf signal strength values acquired with the antenna array which are each based on reception of the rf signal that emanates from the point; and

    using the correlation values to identify a direction relative to the first position along which the point is located.

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