Butusov D.N. 1
Karimov T.I. 1
Karimov A.I. 1
1 Saint-Petersburg State Electrotechnical University
In this paper a continuous model of dynamic system discretization technique, known as delta-transform, is considered. Delta transform shows better accuracy than Laplace discrete transform (z-transform) in fixed-point arithmetic, but has poor signal to noise ratio when input signal frequency is low. A Delta-xi-transform, that does not have this negative feature, is introduced. New discretization method is compared with delta-transform in a series of computer experiments. Accuracy and frequency analysis is performed for the Bessel filter example model. Theoretical results are verified by various computer experiments, performed in MATLAB withFilter Design Toolbox.
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