O.V. Melnik1, M.B. Nikiforov2, V.A. Sablina3, A.D. Chernenko4

1–4 Ryazan State Radio Engineering University named after V.F. Utkin (Ryazan, Russia)
1 omela111@yandex.ru, 2 nikiforov.m.b@evm.rsreu.ru, 3 flyingvictory@mail.ru, 4 anuta201294@yandex.ru