Kvitek E.V., Kutuzov V.I., Shevelenko V.D.
INCREASE OF SPEED OF INFORMATION HARMONICS PARAMETERS DETERMINATION BY THE METHOD FURIE OF GROUP TRANSFORMATION ^{[№ 1 ' 2005]}
Expressions for corresponding group signals, allowing to change the character of transformations in the process of realization of the direct return Furie transformations, which allowes to decrease frequency of discretization in comparison with Nayquist frequency for ranges of lower and middle frequencies, are given on the base of signals presentation as a group of frequency components, amassed in the are of lower frequencies, higher and middle friquencies. It allows to reduce number of calculating processes in comparison with needed on the base of quick Furie transformation.

Kvitek E.V., Shevelenko V.D
IDENTIFYING PARAMETERS OF TECHNOLOGICAL PROCESSES APPROXIMIED BY SPLINES IN FREQUENCY FIELD ^{[№ 1 ' 2003]}
The article analyses the possibility of identifying technological processes more accurately by means of presenting them by splines in frequency field instead of a time field.

^{[№ 5 ' 2002]}

E. V. Kvitek
MEASURING SIGNALS FILTRATION PRESENTED ON THE BASIS OF WALSH FUNCTIONS ^{[№ 3 ' 2001]}
This article deals with the measuring signals filtration method based on the use of Walsh functions as the orthogonal basis. The authors obtained correlation's which ensure the filtering property of the orthonormalizing basis by means of the equiamplitude Walsh polynomial reproduction. The article shows the possibility for practical use of the filtering device based on the peculiarities of the Walsh equiamplitude polynomials. It gives the frequency coefficient of lower frequencies filter transmission for considered class.

Ye.V.Kvitek, V.N.Tarasov, V.D.Shevelenko
FILTRATION OF MEASURING SIGNALS BY THE POLYNOMIAL ORTHOGONALIZATION METHOD ^{[№ 3 ' 2000]}
Filtration spectral method of measuring signals is considered in this article. This method is based on the possibility of signal transformation contraction by means of changing harmonic function basis into Kernel Dirihle basis.

Shevelenko V.D., Shevelenko D.V, Kvitek E.V.
FILTRATION OF MEASURING SIGNALS BY MEANS OF FORMING THE QUOTIENT SUMS OF FURJE ROWS ^{[№ 1 ' 1999]}
This article describes the spectral method of filtration of measuring signals founded on the possibility to reduce (to cancel) the volumes of transformations over a signal by means of transition from the basis of harmonic functions to the basis in the form of Dirichle nucleus. Correlations providing the realisation of the filtre property of orthorationing basis by means of the reproducing the Dirichle nucleus in the form of the amplitude-modulated oscillation were received. The authors show the possibility of the practical realisation of the filtre device and assess its errors.