A.Yu. Gordeev - Post-Graduate Student, Department of Theoretical Radio Physics and Radio Engineering, Moscow State Technical University of Radio Engineering, Electronics and Automation (MSTU MIREA). E-mail: alexur-gor2008@gmail.com V.V. Yatsishen - Dr.Sc. (Eng.), Professor, Department of Forensic Expertise and Physical Materials Science, Volgo-grad State University (VolSU). E-mail: yatsishen@list.ru