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Log magnitude pulse interference detection for a radar system

  • US 4,710,772 A
  • Filed: 12/05/1985
  • Issued: 12/01/1987
  • Est. Priority Date: 12/05/1985
  • Status: Expired due to Term
First Claim
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1. In a radar system wherein received signals having amplitudes which may vary within a wide range of possible amplitudes are processed using automatic gain control (AGC), a pulse interference detection apparatus comprising:

  • means for converting a fixed point data representation of an in-phase (I) component and a quadrature (Q) component for each of said received signals to a floating point data representation having a mantissa and an exponent, said mantissa having at least one or more bits based on desired accuracy;

    means coupled to said converting means and in response to an AGC level word for generating a log magnitude value for each of said received signals; and

    means coupled to said log magnitude generating means for detecting a pulse of interference to one of said received signals in a sweep N-1 at range M based on an examination of said log magnitude value of adjacent sweeps N and N-2 at said range M.

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