Bulgach S. Increase of reliability of functioning of the systems of mobile radio contact

Object of research: Mobileradio system. The aim of the thesis is to resolve the complex scientific and technical issues associated with increasing the reliability of mobile radio communications. Used methods of information theory, methods of invariance theory, methods of system analysis, elements of the methods of the theory of hierarchical multilevel systems, methods of optimal control methods for simulation. Theoretical and practical results and innovation: a comparative analysis of modern mobile communication systems in order to implement the recommendations of the most effective systems of certain parameters, improved methods for optimal design of radio communication systems in different operating conditions, the parameters of modern mobile communication systems for using the theory of complex systems has evolved methods of invariant systems with constant parameters that implement the property of invariance the most simple means. Determined if additive noise ratio is kind of quasidetermined or nonadditive noise ratio leads to a distortion of non-power signal parameters, the invariance characteristics of immunity can be achieved in the class of systems with constant parameters by using appropriate methods of modulation and demodulation signal and selecting the optimal waveform; - First proposed the concept of building an adaptive system of communication: from adaptation in a continuous channel (on the modem) and adaptation in discrete channel (on the codec). Investigated the actual use of these systems, identified advantages and disadvantages. Industry - engineering, telecommunications.