E.I. Algazin - Dr.Sc. (Eng.), Professor, Department of Electronics and Electrical Engineering, Novosibirsk State Technical University. E-mail: algei@ngs.ru A.P. Kovalevsky - Ph.D. (Phys.-Math.), Associate Professor, Department of Mathematics, Novosibirsk State Technical University Y.M. Veshkurtsev - Dr.Sc. (Eng.), Professor, Department of Radio Engineering Devices and Diagnostics Systems, Omsk State Technical University