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Документ The concept of information security in the IoT system(Національний технічний університет "Харківський політехнічний інститут", 2019) Serkov, A.; Kravets, V.; Kasilov, O.; Lazurenko, B.; Mickus, A.The subject of the study are the processes of securing information in wireless control and communication channels of the Internet of Things (IoT) system. The goalis to develop the concept of broadband Internet access and the implementation of key security competencies in the implementation of IoT projects. The taskis to ensure stable and secure operation of the IoT system. The modelis based on the reference model DigComp 2.0, created within the framework of a system of digital competence of citizens. More over, the main area of competence of this model is security. The methodused: methods of analytical, simulation modeling and temporal position-pulse coding. The following results are obtained: A security concept has been developed in the wireless control and communication channels of the IoT system. It is shown,that to obtain high noise immunity of control and communication channels and to protect information from interception, wireless ultra-wideband communication technology should be used, which allows for large volumes and speeds of information transfer. The possibility of joint interference-free operation in the same frequency range of both traditional narrow-band communication systems and systems using ultra-wideband signals is substantiated. A technical solution for the design of an ultra-wideband receiving -transmitting antenna system is proposed. Conclusions.The use of channels with an ultra-wide frequency band allows for an increase in the number of control and communication channels of the IoT system. Predistribution between the channels of orthogonal codes implements the process of control and communication without interception of information and mutual interference. Moreover, the application of the method of temporal position-pulse coding prevents inter symbol distortions of ultrashort pulsescoding. It also reduces the level of distortion of information signals caused by its multipath propagation, which guarantees the security of information in the IoT system.Документ Method of coding information distributed by wireless communication lines under conditions of interference(Національний технічний університет "Харківський політехнічний інститут", 2018) Serkov, A.; Breslavets, Vitaliy; Tolkachov, M.; Kravets, V.The subject matter of the paper is the processes of analysis and evaluation of the effectiveness of information coding methods in wireless systems. The aim is to improve noise immunity of information messages under conditions of powerful electromagnetic interference, with the help of complex signal-code constructions. The objective is to develop a method for noise-immune encoding in a wireless information transmission system, providing increase ininformation transmission rate. The methods used: Simulation and digital signal coding. The following results have been obtained: A method for encoding information transmitted via wireless communication lines in presence of interference. For signal coding, it is proposed to use Gaussian monocycle with time-dependent position-pulse modulation (PPM). It is shown that for organization of independent channels within a single frequency band, it is practical to use a system of orthogonal codes. Pulses of the useful information signal accumulated in a receiver correlator provide significantly increase in signal-to-noise ratio, allowing transmission of information over a wide frequency range well below the noise level. As a result of encoding information in wireless information transmission systems with the help of ultra-short pulse signals, the effectiveness of the proposed method is aquantitatively and qualitatively evaluated. Using Pulse Position Modulation coding in wireless information transmission systems allows transmitting large volumes of information with high transmission rate and high noise immunity of the communication channel as well as protecting the channel from message interception. Ability to work with low radiating power and high signal capacity to penetrate various obstacles ensure fulfilment of electromagnetic compatibility requirements as well as stable communication in conditions of multipath radio wave propagation. Apossibility that powerful electromagnetic disturbances accompanying a lightning discharge may have catastrophic impact on the information transmission channel is also eliminated.