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Journal ArticleDOI

Generalized digital Butterworth filter design

Ivan Selesnick, +1 more
- 01 Jun 1998 - 
- Vol. 46, Iss: 6, pp 1688-1694
TLDR
This correspondence introduces a new class of infinite impulse response (IIR) digital filters that unifies the classical digital Butterworth filter and the well-known maximally flat FIR filter.
Abstract
This correspondence introduces a new class of infinite impulse response (IIR) digital filters that unifies the classical digital Butterworth filter and the well-known maximally flat FIR filter. New closed-form expressions are provided, and a straightforward design technique is described. The new IIR digital filters have more zeros than poles (away from the origin), and their (monotonic) square magnitude frequency responses are maximally flat at /spl omega/=0 and at /spl omega/=/spl pi/. Another result of the correspondence is that for a specified cutoff frequency and a specified number of zeros, there is only one valid way in which to split the zeros between z=-1 and the passband. This technique also permits continuous variation of the cutoff frequency. IIR filters having more zeros than poles are of interest because often, to obtain a good tradeoff between performance and implementation complexity, just a few poles are best.

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Citations
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Near-Infrared Raman Spectroscopy for in vivo Detection of Cervical Precancers:

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Transient-Voltage-Based Protection Scheme for DC Line Faults in the Multiterminal VSC-HVDC System

TL;DR: In this article, a new protection scheme for dc line in multiterminal VSC-HVDC system is proposed, which consists of a main protection and a backup protection.
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Time-Domain Fault-Location Method on HVDC Transmission Lines Under Unsynchronized Two-End Measurement and Uncertain Line Parameters

TL;DR: In this paper, the Bergeron line model is adopted to construct a time-domain fault location equation, considering unsynchronized two-end measurement and uncertain line parameters, and the ratio coefficient of wave velocities between different frequencies and digital band-pass filter are presented for better performance of the proposed method.
Journal ArticleDOI

First results from the AMoRE-Pilot neutrinoless double beta decay experiment

V. Alenkov, +107 more
TL;DR: The advanced molybdenum-based rare process experiment (AMoRE) as mentioned in this paper aims to search for neutrinoless double beta decay with a dual heat and light readout.
Journal ArticleDOI

Estimating Activity‐related Energy Expenditure Under Sedentary Conditions Using a Tri‐axial Seismic Accelerometer

TL;DR: The explained variation in AEE by the model was higher than the explained variation by MI alone and shows that a tri‐axial seismic accelerometer is a valid tool for estimating AEE under sedentary conditions.
References
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Book

Multirate Systems and Filter Banks

TL;DR: In this paper, a review of Discrete-Time Multi-Input Multi-Output (DIMO) and Linear Phase Perfect Reconstruction (QLP) QMF banks is presented.
Book

Digital Filter Design

TL;DR: Introduction to Digital Filters Properties of Finite Impulse-Response Filters Design of Linear-Phase Finite Filters Minimum Phase and Complex Approximation and Comparison of Filtering Alternatives Appendix Index.
Journal ArticleDOI

Recursive digital filters with maximally flat group delay

TL;DR: In this article, a solution obtained by a direct approximation procedure in the z plane is presented, where the denominator of the transfer function turns out to be a Gaussian hypergeometric function, connected with the Legendre functions.
Journal ArticleDOI

Wavelets and recursive filter banks

TL;DR: It is shown that infinite impulse response filters lead to more general wavelets of infinite support than finite impulse response (FIR) filters and a complete constructive method that yields all orthogonal two channel filter banks is given.
Journal ArticleDOI

On the approximation problem in nonrecursive digital filter design

TL;DR: In this paper, a new class of selective non-recursive digital filters with a maximally flat frequency response in the passband and stopband is introduced, based on a special solution of the general Hermite polynomial interpolation and allows computation of the parameters of these filters in closed form.
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