A. S. Bagdasaryan - Dr. Sci. (Eng.), professor, senior research fellow at IRE named after V. A. Kotelnikov RAS. Е-mail: bagdassarian@mail.ru
S. O. Nikolaeva - Post-graduate student, Voronezh State Technical University. E-mail: niks@mail.ru
V. D. Repnikov - Dr. Sci. (Phys.-Math.), professor, head of the department «Applied mathematics»