Model example of suboptimal filtration

The paper considers optimization and research of suboptimal filtering methods of signal processing in the communication channels with complex types of interference in real time. The aim is to obtain mathematical expression that describes the impact of such transformation input influence in order to select authentically useful information from a set of signal and noise. Depending on what data is useful, the following problems should be solved: signal detection, evaluation of parameters for determination of the value of one or more parameters of the useful signal (amplitude, frequency, etc.) as precisely as possible; distinguishing of signals when several input signals can occur and indication of which signals actually present is required; reproduction of waveform, distorted by the influence of noise, into its original form.