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Methods for estimating the number of emitters and their parameters

  • US 5,854,601 A
  • Filed: 04/29/1996
  • Issued: 12/29/1998
  • Est. Priority Date: 04/29/1996
  • Status: Expired due to Term
First Claim
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1. A method for estimating the number of emitters of intermittent or periodic pulsed energy waveforms received at a sensor location and the parameters of said intermittent or periodic energy waveforms, comprising:

  • (a) accumulating over a selected period of time output of said sensor, said output consisting of a set of vectors, each of said vectors consisting of at least one element of parameters of direction, frequency, and amplitude, and which element(s) specify(ies) a point in a space defined by said element(s) for each of said waveforms received when at least said parameter of direction is included;

    (b) dividing said space into a plurality of bins, considering each said vector in turn, and apportioning weight of said each said vector to be accumulated within at least some of said plurality of bins;

    (c) determining at the end of said selected period of time which of said bins exceed a threshold strength and are, therefore, said emitters; and

    (d) calculating said at least one element of parameters for each said emitter as appropriate for said vector elements selected for said space.

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