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Документ Method of forecasting the conditionof radio-electronic situation of multiple systems in the conditions of uncertainty(Національний технічний університет "Харківський політехнічний інститут", 2019) Momit, AlexanderThe task of forecasting future values of the time series based on its previous values is the basis for planning in the economy, trade, energy and technical fields. Forecasting of a radio-electronic situation in the conditions of shortage of radio-frequency resource is a very important component of modern high-tech military conflicts, the transport basis of which are multi-antenna radio-emitting means. For this purpose, an analysis of the known methods of forecasting the radio-electronic situation is carried out in that article. It is established that nowadays there are many models of time series prediction, namely: regression and autoregressive models, neural network models, exponential smoothing models, Markov-based models, classification models, etc. Based on the above analysis, it is found that the most appropriate for use in the prediction problems of the electronic environment of multi-antenna communication systems are time series prediction methods, which are based on autoregressive models. The article proposes a technique for predicting the condition of the radio-electronic environment, which allows to increase the noise immunity of communication systems in the conditions of deliberate interference and the unsteady nature of the predicted process, in order to ensure electromagnetic compatibility and increase the efficiency of use of radio frequency resource by complexes. To solve the scientific problem, we use the general scientific methods of analysis and synthesis of complex technical systems, the theory of noise immunity of radio engineering systems and methods of mathematical modeling. It is advisable to use this technique while assessing the electronic environment and identifying measures to enhance the security of communications systems. The calculations show that the use of this method allows to reduce the error of the forecast by an average of 20%. It is advisable to practically implement the proposed methodology while developing software for programmable radio stations.Документ Methods of estimation of the channel state of air defense systems(NTU "KhPI", 2017) Zhyvotovskyi, Ruslan; Petruk, SergiiThe subjectof study in the article is the methods for assessing the state of channels of air-conditioning complexes operating in a complex electronic environment. The methods discussed in this article include the method of least squares, the method of mean square deviation, channels estimation methods for iterative methods of signal processing at reception, suboptimal algorithms for iterative channel estimation and information symbols based on t he maximum likelihood method, linear unbiased estimation methods with minimal dispersion and methods of linear estimation with a minimum of mean square deviation. The purposeof the study is to conduct an analysis of existing methods for assessing the state of the air defense airway channels in the conditions of radio-electronic suppression and multi-beam propagation of radio waves. The tasks solved in the study: a mathematical description of known methods for assessing the state of the channels and the development of recommendations for the synthesis of optimal methods for assessing the state of the channels. The methods used in the study: theory of communication, theory of noise i mmunity and electronic warfare. In the course of the study, recommendations were obtained for the synthesis of optimalmethods for assessing the status of channels under the conditions of intentional interference. Conclusions: in the presence of sufficient a priori information about the transmission of information symbols, the best results on the criterion of the ratio ofaccuracy of estimation and complexity of implementation is demonstrated by the algorithm of linear estimation at the minimum of the mean-square deviation. In the absence of sufficient a priori information about the transmission of symbols, the best optionis an unmatched estimate for the minimum of the smallest squares. In order to increase the accuracy of the evaluation of the transmission characteristics of the air defense airway channels inthe conditions of a complex electronic environment it is advisable to use iterative principles.Документ Model of impact interferences on radiocommunication systems for special communications(NTU "KhPI", 2017) Romanenko, Igor; Shyshatskyi, AndriiAs the analysis of recent events in the East of Ukraine shows, radio communication is the transport basis for the construction of telecommunication networks of special purpose. In view of the above, the subject of study in the article are the special radio communication systems, operating in a complex electronic environment. The purpose of this articleis to develop a mathematical model for the effects of interference on systems of special radio communication. The taskssolved in the course of the study: a formal description of various types of noise that is used to suppress the systems of special radio communication; analytical representation of the probability of a bit error for signals with different types of modulation under the influence of the main types of deliberate disturbances; development of recommendations for increasing the noise immunity of special radio communication systems with different types of signal modulation under the influence of deliberate interference. In the course of the study, the following method swere used: signal theory, radiocommunication theory and the theory of potential impedance protection. In the course of the study, analytical dependencies were obtained that allow us to calculate the probability of a bit error in the effect of intentional interruptions for different types of signal modulation. Conclusions: the proposed mathematical model should be used in the analytical modeling and evaluation of the performance of broadband radio networks of a special purpose taking into account the combined action of the additive white Gaussian noise and structural impediment, algorithms for the formation and processing of signals at the physical level, as well as the properties of the radio channel.Документ Analysis of modern condition of military radiocommunication system(НТУ "ХПІ", 2017) Romanenko, Igor; Shyshatskyi, AndriiAim of the article is to conduct an analysis of military communications systems that were used in the area of conducting antiterrorist operation in the Donetsk and Lugansk regions. The article analyzes the modern facilities of military communication, namely: military radiocommunication systems, military satellite communication systems, military systems of radio relay and tropospheric communication. The advantages and disadvantages of each type of communication are considered, the causes of their occurrence were considered, and the ways of solving these reasons in the future were substantiated. An analysis of the main technical characteristics of military communication systems, opportunities, advantages and disadvantages has been conducted. The perspectives for the development of military communication systems have been determined on the basis of the analysis of the military facilities of communication used in the article, which are used in the region of the antiterrorist operation in the Donetsk and Lugansk regions. To eliminate the problematic issues mentioned in the article, the authors of the article are proposing to launch their own military satellite for the needs of the Armed Forces of Ukraine; To develop new models of military communication; To conduct deep modernization of the existing radio stations, command-staff cars, radio relay and tropospheric stations; To integrate telecommunications equipment adopted in the last years into a single information space of the Armed Forces of Ukraine, as well as to reach agreement with representatives of leading telecommunication equipment manufacturers regarding the transfer of technologies and deployment of production in the territory of Ukraine.