David Middleton

Abstract: A useful approximate first-order characteristic function for Class C interference is obtained, for arbitrary combinations of the additive Class A and Class B nongaussian components which define Class C noise. From this, in turn, the associated first-order probability density, W₁^(x)_C+G, is derived, including an independent gaussian component. The corresponding optimum threshold detection algorithms (for coherent, incoherent, and composite reception) are described, including the associated bias terms. The specific rôle of W₁^(x)_C+G in these threshold algorithms is noted, as well, also for the Class C statistics (L⁽²⁾, L ⁽⁴⁾) governing detector performance. Various topics for subsequent investigation are briefly indicated.

Keywords: Class A, B noise; non-Gaussian interference; interference models

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