Roman Kaszynski

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Processing of the brainstem auditory-evoked potential (BAEP) signal is achieved with a simple averaging over a number of realizations. The proposed filtering method of the BAEP signal is an extremely attractive alternative for long-duration examination with a repeated stimulus. Repetitive stimulation (20-30 times) allows additional averaging to be performed(More)
Linear time-varying (LTV) systems have found a niche of their own in the processing of continuous-time signals. In this brief, it is shown how the reduction of the duration of the transient response of a class of continuous-time LTV filters may be seen as the combined effect of the increased dampening of its amplitude response and the increase of the(More)
The filter of constant component with spectral-response characteristic having pass-band narrowed to frequency o = O and stop-band (with a tolerance) limited by frequency R is proposed. Under such filtration assumptions, different possibilities of synthesis for the filters with constant and variable parameters arise. As evaluation index of constant component(More)
The paper presents the methodology how to vary in time values omega<sub>0i</sub> = omega<sub>0i</sub>(t) in selected links of a structure of low-pass Bessel filters. In examinations of the filters a significant shortening of the transient state is achieved at the cost of slight increase in the oscillations. It allows to shorten time intervals of filtered(More)
One important problem of signal processing in measurement systems is designing a filter that possesses a linear-phase response and, at the same time, has a short transient state. This paper presents the methodology of varying, in the time parameters, a low-pass Bessel filter and a filter of a constant component. In the proposed filters, significant(More)
One of the important problems of analog signal processing is to design the filters which possess linear phase characteristics. This paper presents the concept of time-varying Butterworth filters with linear phase response. The compensation of the phase characteristics is carried out with the aid of a phase shifter which is cascade-connected to the structure(More)
A classical problem in the field of filter theory is the construction of continuous-time filters which simultaneously possess constant group delay in the passband and steep amplitude selectivity. Such a kind of problem is usually solved using allpass filters which are able to compensate the group delay response without destroying the magnitude response.(More)
One of the important problems of the analog signal processing is to design the filters which possess linear phase response in the frequency domain and at the same time the sharpness of the step response in the time domain. This paper presents theoretical concept of time-varying Butterworth filters with equalized group delay response. The compensation of the(More)
This paper presents theoretical concept of time-varying Butterworth filters with compensated group delay response. The compensation of the phase characteristics is carried out with the aid of a phase shifter which is cascade-connected to the structure of the classic Butterworth filter. The parameters of the phase shifter were calculated in this way that the(More)