Design of IIR fullband differentiators using parallel all-pass structure
| Autor: | Ivan Krstić, Miloš Živković, Goran Stančić |
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| Rok vydání: | 2019 |
| Předmět: |
Frequency response
Computer science Applied Mathematics Phase (waves) 020206 networking & telecommunications 02 engineering and technology Filter (signal processing) Chebyshev filter Differentiator Nonlinear system Computational Theory and Mathematics Artificial Intelligence Control theory Signal Processing Phase response 0202 electrical engineering electronic engineering information engineering 020201 artificial intelligence & image processing Computer Vision and Pattern Recognition Electrical and Electronic Engineering Statistics Probability and Uncertainty Infinite impulse response |
| Zdroj: | Digital Signal Processing. 87:132-144 |
| ISSN: | 1051-2004 |
| Popis: | A new approach for the design of recursive fullband digital differentiators using parallel all-pass structure is discussed in this paper. While magnitude response of designed fullband differentiator approximates the ideal one in the weighted Chebyshev sense, its phase response is a nearly-linear function of frequency at low frequencies. The low-pass differentiators, presented in this paper, are obtained by cascading the proposed recursive fullband differentiators with the corresponding low-pass filters. The phase response linearity error of such low-pass differentiators is shown to be primarily affected by the phase response nonlinearity of the utilized low-pass filter. A comparison with some of the existing fullband and low-pass differentiators shows that proposed differentiators require less multiplications, while their phase and magnitude responses are either better or slightly worse than those of existing differentiators. |
| Databáze: | OpenAIRE |
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