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Документ Analysis of the known methods of channels communication control with the interference and selective fading(Національний технічний університет "Харківський політехнічний інститут", 2019) Zhyvotovskyi, Ruslan; Momit, Alexander; Onbinskyi, Yaroslav; Lyashenko, AnnaDesigning adaptive radio systems, depending on their purpose, solves the problem of optimizing one of the performance indicators with restrictions on others. In turn, the development and implementation of adaptive information sharing techniques require the establishment of effective procedures for monitoring and predicting the status of communication channels and the quality of information transmission. Given the rapid development of electronic warfare facilities, the expansion of the list of interferences that can be created by these complexes, it is great relevance for further scientific research on the creation of new methods of monitoring the status of the communication channel. In this research, the authors analyzed the characteristics of the main methods for assessing the status of communication channels. In the course of the analysis, the authors used general scientific methods of analysis and synthesis, the basic provisions of communication theory, data transfer theory, space-time coding theory, noise immunity theory, signal-code theory, etc. The authors of the article analysis of the known methods of estimating the state of the channel of multi-antenna communication systems showed that the known scientific articles do not contain the following: parallel estimation of the status of the channel by several indicators; obtaining a generalized channel status assessment; continuous evaluation of several characteristics in real-time; at the same time evaluate both the linesdown and the lines up; the combination of the impulse response of the channel state, the frequency response of the channel status, and the bit error probability is not used for the estimation. It is established that at present there is no universal methodof monitoring the status of channels of multi-antenna radio communication systems, which would give an accurate, fast estimate of the status of the channel in real-time, which would allow effective adaptation in a channel with non-stationary parameters.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 Method of signal processing in МІМО systems of unmanned aviation complexes(НТУ "ХПІ", 2018) Zhyvotovskyi, Ruslan; Petruk, SergiiNoise immunity of receiving signals in the MIMO (Multiple Input Multiple-Output) system essentially depends on the choice of the signal processing method on the receiving side. Existing methods of signal processing, in the MIMO system, that provide a given quality of information transmission, have high computational complexity, so there is a necessity to improve these methods. The purpose of this article is to increase the impedance of channels of control and data transmission of unmanned aerial systems, which was achieved by developing new method of signal processing in multi-antenna systems of unmanned aerial systems. The article developed an improved method of signal processing in MIMO systems of unmanned aerial systems, the essence of which is the ability to work with a known and unknown correlation matrix, the division of received signals into groups and the evaluation of each group, taking into account the evaluation error. During the research, the theory of communication, signal theory, the theory of antennas and the theory of noise-proof coding were used. The difference between an improved method is, that the method allows you to work with an unknown correlation matrix. While processing a signal in a demodulator, each iteration takes into account not only the estimate obtained in the previous step, but also the degree of accuracy of the character estimation. The proposed improved method has characteristics, that are close to the characteristics of demodulator, optimal for the criterion of maximum likelihood, but much less computational complexity. The method allows you to reduce computing costs by 20 times,compared with the maximum likelihood algorithm. The practical implementation of this method will allow the creation of software for communication equipment of unmanned aeronautical complexes, which operate in difficult conditions of the radio electronic environment.Документ Justification of perspectives directions of upgrading radiocommunication systems of Armed Forces Ukraine(НТУ "ХПІ", 2017) Zhyvotovskyi, Ruslan; Petruk, SergiiAim. In the article explore issues and directions of the innovative approach to the development of automated complexes and radio communication facilities for special purposes. During the research it was determined that the effectiveness of the military radio communication system would be improved by facilities of modernization of the latest facilities of radio communication of foreign production or by improving the existing system of military radiocommunication. Presented directions and features of leading research and development works for the improvement and development of channels and systems of military radio communication, the creation of nodes and centers of radio communication, automated complexes and radio communication of special purpose were presented. Was given generalized approach to the construction of the system of automated radio communication, antenna-hardware complexes, software and hardware complexes of radio prediction and planning of use of radio frequency resource. Conclusions. According to the results of the conducted researches, conceptual decisions about the system engineering and technological reconfiguration of the existing radio communication system are proposed, which will allow to work in the automated radio networks as part of the radio centers of information and telecommunication units; to unify the facilities and complexes of radio communication with facilities of communication and automation, to provide counter work with the equipment of the old park, as well as to construct a fundamentally new radio communication system with the ability to calculate the planning and forecasting of the radio frequency resource.