Yelizarenko A. Methods to ensure the required of channels of mobile technological radio communications in the conditions of railway infrastructure influence

Object of study - the process of designing, calculating and organizing performance monitoring of the networks of technological radio communication with mobile objects at the railway transport. The aim of the thesis is to increase the reliability of channels train technological radio communication in the design phase and operation. Research methods: methods of the theory of radio wave propagation, probability theory and stochastic processes; methods of technical electrodynamics. With the development of improved statistical models of radio wave propagation and the method of calculating channel mobile radio used elements of the theory of radio wave propagation and the theory of probability and random processes. When developing mathematical models of complexed multi-band antennas used methods of technical electrodynamics. To confirm the reliability of the theoretical development of the computer simulation and experimental studies (field measurements of signal levels in open areas and in tunnels). Scientific novelty of the obtained results. 1. An improved statistical model of radio wave propagation in mobile radio channels, which differs from the known fact that fully takes into consideration the factors that determine the levels of signals in the conditions of influence of the railway infrastructure and provides improved accuracy of forecasting. 2. Further development of the method of calculation channels of the movable technological train radio communication, which, unlike existing technology and frequency provides versatility, and the analytical form of payment simplifies automation and enhances the reliability of forecasting. 3. For the first time developed a mathematical model complexed multi-band antennas based on linear nested, conical and pyramidal emitters, which provide the same width of the main lobe of the radiation pattern. The practical significance of the findings is as follows. 1. Using the proposed model improves the accuracy of determining the energy characteristics of radio channels at 8-11 dB at stations and stages of Railways in comparison with the recommendations of the International Union of Railways. 2. Developed method of calculating the range of channels radiating cable in tunnels, Railways and schemes of organization of data networks train radio communication in tunnels with a length up to 2 km. 3. Recommendations on organization and calculation of technological radio communication channels using radiating cable in tunnels made in the developed "rules of organization and calculation of train radio communication networks" approved by Order of the State administration of railway transport of Ukraine dated 09.06.2009, No. 340-C. 4. The structure and algorithms of automation of the measuring complex of the radio channel of mobile radio. The results of research implemented in research works which were carried out in the Ukrainian state University of railway transport and in the educational process of the Department of transportation, which is confirmed by corresponding sales records.