APPLICATION PARAMETRIC METHODS FOR THE ANALYSIS OF NON-LINEAR SIGNALS

Myasnikova Mariya Georgievna, candidate of technical sciences, associate professor, sub-department of rocket-space and airation instrument, Penza State University (40 Krasnaya street, Penza, Russia), rkap@pnzgu.ru

621.391

10.21685/2307-5538-2018-3-4

Background. In the article the application of the Prony method for the analysis of nonlinear signals is considered. Separately, application of the method for signals with various types of nonlinearity is considered (nonlinearity of the type of insensitivity, nonlinearity of the saturation type, combined nonlinearity).
Materials and methods. The studies were carried out on model signals by mathematical modeling of processing algorithms in application software packages.
Results. The errors of the measurement of the amplitude and frequency were investigated using the Prony method for nonlinear signals. For each of the types of nonlinearity considered in the article, a signal processing algorithm is given, which makes it possible to improve the accuracy of measurement of parameters.
Conclusions. With all the types of nonlinearity considered, it is possible to use the Prony method to measure the signal parameters. The error in determining the parameters can be reduced by increasing the order of the model and using correction for linear sections.

nonlinear signal, signal spectrum, nonlinearity of the type of insensitivity, nonlinearity of the type of saturation