Bulgach T. Increasing of Efficiency Amplification and Transformation Systems (ATS) of Telecommunications Facilities.

The purpose of this dissertation is the further research of the modular Amplification and Transformation Systems (ATS) analysis and synthesis theory and the development of structural build-up principles, outcoming signal synthesis methods and control algorithms of multifunctional ATS of telecommunications facilities on its basis. The research is focused on studying signal reproduction and amplification processes using modulation methods. The research subject includes key invariant ATS with multiple modulation and predictive control. Research methods. Problems specified in this dissertation have been solved on the basis of the invariance theory, the automatic control theory, Fourier transformation, the adaptive control theory, the theory of fuzzy sets and developed synthesis methods of systems with fuzzy controls. Hardware used: radio and technical devices with implemented modular amplification and transformation systems that can be used as components of different telecommunications hardware. Theoretical and practical importance of outcomes. Scientific outcomes obtained thanks to the dissertation allow designing radio and technical devices with characteristics superior to the existing analogues. Based on the obtained outcomes, absolutely new multifunctional ATS with the specified characteristics have been produced and tested. Research outcomes have been utilised in the latest telecommunications hardware. Practical importance of obtained outcomes consists in the following: Developed build-up principles and ATS research outcomes allow implementation of structural invariance condition in the ATS with multiple modulation. It enables implementation of specified ATS functional characteristics provided that disturbance influence is compensated. Obtained analytical expressions that provide for operational piece and continuous approximation of the outcoming signal of the ATS with multiple modulation and allow performing structural and algorithmic optimization of the ATS power path. Examples of invariant ATSs with multiple modulation, extrapolation of influencing functions and digital correction of coordinate and parametric control algorithms in the delta modulation format have been developed. It has enabled implementation of the symmetrisation principle for non-linear disturbance transfer channels at the application level. Operation algorithms and functional build-up of the analyzer-extrapolator on the basis of the LDM coder have been developed. The coder performs identification and high-precision extrapolation of the influencing function. Methods for synthesis and stability analysis of the ATS with fuzzy control that provide for the combination of adaptive and fuzzy approaches during control algorithm synthesis have been developed. Scientific novelty of the obtained outcomes consists in the following: Build-up principles for ATS with multiple modulation and combination of features of generation, adjustment of outcoming signal parameters and compensation of coordinate and parametric disturbances in a single functional nod have been developed and justified. Approximation methods that allow high-precision piece and continuous approximation of random signals using a number of criteria (square deviation, mean integral estimate) have been proposed and developed. Structures and algorithms of adaptive and predictive ATS control using fuzzy logic framework have been developed and researched for the first time. They provide high precision of invariance conditions implementation, when the data on system properties and external influences are incomplete. Principles and methods of extrapolation of functions influencing ATS in order to increase precision compensation for coordinate and parametric disturbances have been proposed and justified. Invariant ATS structures with multiple modulation, extrapolation of influencing functions and digital correction of coordinate and parametric control algorithms in the delta modulation format have been proposed. It has enabled implementation of the symmetrisation principle for non-linear disturbance transfer channels at the application level. Operation algorithms and functional build-up of the analyzer-extrapolator on the basis of the LDM coder have been developed. The coder performs identification and high-precision extrapolation of functions. Implementation degree: proposed principles, algorithms and systems have been utilised in the developments of the Electrodynamics Institute of the National Academy of Sciences of Ukraine, "Cross-Industry Scientific and Technical Centre for Wind Energy of the Renewable Energy Institute of the National Academy of Sciences of Ukraine" public company, " Ukrainian State Radio-Frequency Centre " public company, "Ukrainian Scientific and Research Institute of Communication" public company. They are also used for educational purposes in the State University of Information and Communication Technologies (Kyiv). Utilisation industry (branch): technical sciences, telecommunications.