The article considers a method for detecting periodic signals under the background of
random interference. The implementation of the detector on the basis of a non-autonomous
chaotic oscillator is proposed. The authors have justified choosing a tangent bifurcation as
the basis of the detection mechanism. It is assumed that in the absence of a detectable signal
at the input of the chaotic oscillator, its operation mode will be chaotic, and if it is available,
a periodic mode will be established. A numerical model of the detector in Matlab / Simulink is
implemented, which implements a system of differential equations for the chaotic oscillator
Murali-Lakshmanan-Chua. As an informative parameter of the detector, the amount of
chaotic emissions during the detection period was chosen and theoretical dependencies for it
were presented. The proposed model allowed to carry out statistical studies of the boundary
of chaos and periodic oscillations for the chaos generator under the influence of random
narrow-band interference. Based on the dependencies obtained, the optimal parameters of the
system were selected. The study as a whole made it possible to conclude that the proposed
detector can be used as a node of devices receiving an information signal against a
background of non-stationary interference.
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Patrusheva Tatyana Vasilievna
Altai State Technical University
Barnaul, Russian Federation
Patrushev Egor Mikhailovich
Candidate of Technical Sciences, Associate Professor
Altai State Technical University
Barnaul, Russian Federation
