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Three-dimensional maximum a posteriori (map) tracking

  • US 5,425,136 A
  • Filed: 03/23/1992
  • Issued: 06/13/1995
  • Est. Priority Date: 03/23/1992
  • Status: Expired due to Term
First Claim
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1. A three-dimensional tracker for determining a path of a target moving through space, said tracker comprising:

  • storage means for storing sample time interval, frequency and beam direction data comprising a three-dimensional set of Fast Fourier Transform (FFT) magnitude detected data representative of a three-dimensional image of a target moving through space, which data comprises a set of numerical values representative of sample time interval versus frequency data for each beam direction, said sample time intervals covering a time period of interest;

    processor means for processing said stored set of numerical values by sequentially processing a predetermined number of subarrays of numerical values such that numerical path values from each numerical value of a previous time interval to each numerical value of a current time interval are computed, a largest integrated path value from one time interval to a next time interval is determined, and the path through the entire set of numerical values that has a maximum integrated numerical value is indicative of the path of the target over said time interval of interest; and

    means for outputting the path of the target over said time interval of interest, said target path as indicated by said path through said entire set of numerical values that has said maximum integrated numerical value.

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