I.M. Moiseenko - Post-graduate Student, Saratov State University.Е-mail: quikc@yandex.ru M.Yu. Morozov - Ph.D. (Phys.-Math.), Researcher, Kotelnikov IRE RAS (Saratov Branch) A.R. Davoyan - Ph.D., University of Pennsylvania, USA. V.V. Popov - Dr.Sc. (Phys.-Math.), Head of Laboratory, Kotelnikov IRE RAS (Saratov Branch)