Golevych O. The ensembles of wideband chaotic telecommunication signals with the reduction of system interference

The object - signals and processes for generating and applying subcarrier oscillations in multi-channel radio and telecommunication systems. The subject of research is ensembles of subcarriers on the basis of deterministic chaos. The research methods are methods of electrical circuits and signals theory for the analysis of chaos oscillators' structure and characteristics; statistical and correlation analysis theory for estimation of chaotic signals' parameters and chaotic oscillators' classification; optimal reception and noise immunity of telecommunication systems provision theory for assessing the level of system interference which creates channel subcarriers' ensembles of various dynamic systems; mathematical modeling methods and differential equations' solutions with a variable integration step for chaotic signals of required length realization; methods of the chaotic systems' nonlinear dynamics' analysis for studying properties of deterministic chaos oscillators' synthesized signal ensembles. Theoretical and practical results are as follows: a set of programs was developed that enables to carry out the identification of chaotic regimes of any chaos oscillator generation with the usage of cluster and parallel computing to determine the chaotic operation modes' parameters; it also gives possibility to implement the integrated analysis of any chaos oscillator by studying intercorrelated and spectral characteristics of chaotic signals with different values of input parameters to decrease the value of system interference in UWB telecommunication systems. On the basis of the developed draft patterns of chaotic signals' oscillators ("deterministic chaos" type) the possibility to study chaotic dynamic's modes, information transfer processes with the switch chaotic modes in real time was provided. The results, obtained in the course of thesis' carrying out, can be used to design direct chaotic transmitting devices on the basis of chaos oscillators, which were described by systems of nonlinear differential equations and non-linear recurrence equations. Scientific and practical results, presented in the thesis, were applied for the detection of broadband noise-like signals in the units of the telecommunication equipment (Ltd. "Terratel"). The results, obtained in the thesis, were implemented into the educational process at the department of radioelectronic devices and telecommunications in Khmelnytsky National University. All implementation results were confirmed by relevant acts.