I.М. Lerner1, R.R. Fayzullin2, D.V. Shushpanov3, V.I. Il’in4, I.V. Ryabov5, А.N. Khairullin6
1,2,6 Kazan National Research Technical University A.N. Tupolev – KAI (Kazan, Russia)
3 St. Petersburg State University of Telecommunications. prof. M.A. Bonch-Bruevich (St. Petersburg, Russia)
4 Kazan (Privolzhsky) Federal University (Kazan, Russia)
5 Volga State Technological University (Yoshkar-Ola, Russia)