Robust detector for narrow-band signals in non-Gaussian noise

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Abstract
For the detection of a bandpass signal with Rayleigh amplitude and uniform phase we first show the degradation in performance of the square-law detector when the in-phase and quadrature noise components have small degrees of non-Gaussian contamination. A robust detector using limiter-squarers instead of square-law characteristics to limit the influence of occasional, large observations is proposed. Specific numerical results illustrate the considerable advantage of the robust structure when small degrees of deviation occur from the nominal Gaussian assumption.

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