Abstract

A first-order nonlinear radio filter with the monostable potential of the signal-noise interaction is investigated within the framework of the spectral approach. It is shown that, in the case when signal frequencies are not very high, a stationary solution to the equation describing the behavior of the filter can be sought for in the form of a Fourier series. The solution obtained in the study is used to explain the basic features of the stochastic signal filtering effect. As a result of this effect, the output signal-to-noise ratio exceeds its input value. Theoretical predictions are compared to experimental data.

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