K.K. Vasiliev - Dr. Sc. (Eng.), Professor, Head of Department «Telecommunications», Ulyanovsk State Technical University. E-mail: vkk@ulstu.ru V.E. Dementiev - Ph. D. (Eng.), Associate Professor, Department «Telecommunications», Ulyanovsk State Technical University. E-mail: vitawed@mail.ru N.A. Andriyanov - Post-graduate Student, Department «Telecommunications», Ulyanovsk State Technical University. E-mail: nikita-and-nov@mail.ru