A.B. Natalin - Ph. D. (Eng.), Associate Professor, Department of Radio Engineering Theory, Electrotechnical University «LETI» (Saint Petersburg) E-mail: abnatalyin@yandex.ru A.A. Samolyanov - Engineer, Scientific Laboratory of Radios Systems and Signal Processing, Electrotechnical University «LETI» (Saint Petersburg) E-mail: samol@mail.ru A.B. Sergienko - Ph. D. (Eng.), Associate Professor, Department of Radio Engineering Theory, Electrotechnical University «LETI» (Saint Petersburg) E-mail: sandy@ieee.org