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Radar return signal processing method

  • US 5,416,488 A
  • Filed: 12/27/1993
  • Issued: 05/16/1995
  • Est. Priority Date: 12/27/1993
  • Status: Expired due to Fees
First Claim
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1. A method for distinguishing targets from active clutter and from passive clutter in a radar system, said method comprising the steps of:

  • forming a range-Doppler map from a return signal generated by a radar receiver, said map having a multiplicity of map cells wherein each map cell characterizes an amplitude component of said return signal at one of a plurality of range gates and one of a plurality of Doppler bins;

    forming a list of potential targets from said map, said list identifying subject map cells whose amplitudes exceed a threshold value;

    evaluating amplitudes of said subject cells against amplitudes of selected ones of said map cells to identify subject cells whose amplitudes are likely to have resulted from passive clutter; and

    said evaluating step comprises, for each Doppler bin of said map, the step of comparing amplitudes of said subject cells with peak amplitudes for the Doppler bins within which said subject cells reside.

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