Оптимізація пошуку дискретних складних сигналів з необхідними властивостями для застосування у сучасних інформаційно-комунікаційних системах

• Дата: 2019
• Автори: Горбенко, Іван Дмитрович, Замула, Олександр Андрійович, Лик, Хо Чі
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Kamianets-Podilskyi National Ivan Ohiienko University 2019
• Онлайн доступ: http://mcm-tech.kpnu.edu.ua/article/view/173700
• Назва журналу: Mathematical and computer modelling. Series: Technical sciences

Among the main areas of the performance indicators improvement of information and communication systems (ICS), in particular, noise immunity, secrecy, and information security, it is possible to identify the areas associated with the use of phase-manipulated broadband signals and frequency-phase-manipulated signals. Since in multi-user systems, the code division of channels is based on the difference in signals, then the construction of ICS and performance indicators of these systems are determined by the choice of signals and their properties. In this case, discrete sequences (DS), that extend the spectrum (manipulate carrier frequency), should be based on nonlinear construction rules and have improved correlation, ensemble and structural properties. In particular, when using signals such as the physical carrier of information or synchronization signals, the time expenditures on the disclosure of the structure of the signals used are increasing and the setting of «optimal», from the standpoint of the counter-station, obstacles becomes problematic. Complex signals obtained on the basis of such sequences, possess, on the one hand, structural properties, similar to the properties of random (pseudorandom) sequences, and on the other hand, necessary ensemble and correlation properties. The side petals minimization levels of the ACF is of greatest importance when designing a signal for such applications as measuring the lag time, time resolution, etc. In this paper, the problem of optimizing the synthesis of nonlinear discrete sequences, which have improved ensemble, structural and autocorrelation properties, is formulated and solved. The use of non-linear discrete signals, which are formed on the basis of such sequences, will provide the necessary values of impedance protection, information and structural secrecy of the ICS operation