Error probabilites for a.s.k./p.s.k. systems in an additive mixture of Gaussian and impulsive noise

A simple expression for the error probability for coherent a.s.k/p.s.k systems in an additive mixture of Gaussian and impulsive noise is obtained. It is shown that the impulsive noise considered may, in certain situations, be treated as conditionally Gaussian. This allows the above error probability to be expressed a weighted sum of the error probabilities due to Gaussian noises of different noise powers.