2018
DOI: 10.1109/tcsi.2017.2746747
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A Variational Approach for Designing Infinite Impulse Response Filters With Time-Varying Parameters

Abstract: Filter design with short transient state is a problem encountered in many fields of circuits, systems and signal processing. In this paper a novel low-pass filter design technique with time-varying parameters is introduced in order to minimize the rise-time parameter. Through the use of calculus of variations a method is developed to obtain the optimal closed-form expression for adjusting the parameters. In this context, two cases are addressed. The ideal case in which infinite bandwidth is required and a solu… Show more

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Cited by 4 publications
(2 citation statements)
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“…The proposed digital filter is based on an analog oscillatory system, which is subjected to the discretization process. The improvement of the dynamic behavior attained by the proposed filter structure is based on temporary changes in the value of dynamical parameters of the analog filter prototype [6,7].…”
Section: Introductionmentioning
confidence: 99%
“…The proposed digital filter is based on an analog oscillatory system, which is subjected to the discretization process. The improvement of the dynamic behavior attained by the proposed filter structure is based on temporary changes in the value of dynamical parameters of the analog filter prototype [6,7].…”
Section: Introductionmentioning
confidence: 99%
“…The duration of the transient state depends mainly on the filter order and the filter selectivity [6]. Long-lasting transients cause huge problems, particularly when short-time signals are filtered or when the initial phase of a processed signal is of great importance [7][8][9]. In such cases a useful signal can be considerably distorted due to the presence of the filter transient response or the signal can be entirely lost in the transient.…”
Section: Introductionmentioning
confidence: 99%