Synthesis of quasi-optimum two-level signal discriminator with level changing at unknown point

Optimum estimates were derived for the moments at which the level of a two-level signal changes. It is assumed that digitizing of an additive mixture of a binary signal and normal random noise results in a sequence of random quantities with irregularity manifested by a change in the mathematical expectation at an unknown point. A circuit is derived for a quasioptimum two-level signal discriminator. The noise tolerance of the proposed discrimination method is estimated; graphs are plotted to illustrate the behavior of the logarithm, and the error probabilities which occur in testing the hypothesis of level has change by using the likelihood ratio. The receiving synthesizer is most effective under conditions of a priori indeterminacy with regard to the moment of delay of the signal.