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System and Method for Three-Dimensional Geolocation of Emitters Based on Energy Measurements

  • US 20120235864A1
  • Filed: 03/16/2011
  • Published: 09/20/2012
  • Est. Priority Date: 03/16/2011
  • Status: Active Grant
First Claim
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1. A system for locating an emitter within an area comprising:

  • a receiver to receive signals transmitted by said emitter and obtain measurements of signal strength for said received signals at a plurality of different locations within said area; and

    a processor to process said signal strength measurements to locate said emitter within said area, wherein said processor includes;

    a location module to process said signal strength measurements and determine a three-dimensional location of said emitter within said area based on relationships of distances between said emitter and each of said plurality of locations, wherein said distances are unknown, said signal strength measurements are proportional to said unknown distances, and said location module includes;

    a variable module to determine said three-dimensional location by solving a set of simultaneous equations relating to said distances, wherein said set of simultaneous equations includes a first set of variables including values for coordinates of said plurality of locations, a second set of variables including values for distances between a reference origin in said area and said plurality of locations, a third set of variables representing said unknown distances between said emitter and said plurality of locations, and unknown variables representing coordinates of said three-dimensional location of said emitter within said area, and wherein said third set of variables representing said unknown distances within said set of simultaneous equations includes values that are approximated by corresponding signal strength measurements to solve for said unknown variables and determine said three-dimensional location.

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