V.V. Vityazev - Dr. Sc. (Eng.), Professor, Chair of "Telecommunications and Fundamentals of Radio Engineering" Department, Ryazan State Radio Engineering University. E-mail: vityazev.v.v@rsreu.ru
E.A. Likhobabin - Research Associate of "Telecommunications and Fundamentals of Radio Engineering" Department, Ryazan State Radio Engineering University. E-mail: lichobabinea@gmail.com