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Composite hough transform for multitarget multisensor tracking

  • US 6,724,916 B1
  • Filed: 01/05/2000
  • Issued: 04/20/2004
  • Est. Priority Date: 01/05/2000
  • Status: Expired due to Fees
First Claim
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1. A computer system for processing digitized data to determine the track of a target comprising:

  • a plurality of arrays of sensors for receiving signals from a target;

    a receiver for receiving signals received by the plurality of sensor arrays;

    a data storage device;

    a computer for retrieving data from the data storage device and hypothesizing a track with track parameter values (θ

    , v, D, t01), where θ

    is reference track direction relative to east, v is target speed, D is the horizontal distance at CPA from a target to a sensor pair, and t01 is CPA time of reference track;

    generating a corresponding template delay curve in a primary correlogram;

    performing integration along the template delay curve in the primary correlogram;

    computing a delay curve parameter (θ

    2, v/D, t02) for a secondary array based on geomtricconstraints involving said track parameter values, where θ

    2 is reference track direction relative to secondary array and t02 is CPA time of reference track with respect to secondary array;

    generating a corresponding template delay curve in a secondary correlogram based on the delay curve parameter (θ

    2, v/D, t02);

    performing integration along the template delay curve in the secondary correlogram and storing integrated values;

    computing a delay curve parameter for a mirrored track (θ

    2m, v/D2m, t02m) for the secondary array based on geometric constraints;

    generating a corresponding template delay curve in the secondary correlogram;

    combining the integrated values and storing it in, the corresponding composite Hough space; and

    thresholding accumulated pixel values to detect the track.

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