Journal ArticleDOI
Computation of harmonic comb filter weights
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TLDR
A simple formula for the coefficients of such a polynomial and for their derivatives with respect to the frequency interval is presented and is applied as well to the computation of Butterworth filter parameters.Abstract:
Harmonic comb filters are characterized in the frequency domain by notches arranged at equal intervals, and centered about DC. For a finite impulse response harmonic comb filter, the characteristic polynomial has its roots on the unit circle at equal angular intervals, symmetrically about 1+j0. A simple formula for the coefficients of such a polynomial and for their derivatives with respect to the frequency interval is presented. This result is applied as well to the computation of Butterworth filter parameters. >read more
Citations
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Patent
Signal processing apparatus.
Kheir Diab,Esmaiel Kiani-Azarbayjany,Ibrahim M. Elfadel,Rex Mccarthy,Walter M. Weber,Robert Smith +5 more
TL;DR: In this paper, a method and apparatus for analyzing two measured signals that are modeled as containing primary and secondary portions is presented, where coefficients relate the two signals according to a model defined in accordance with the present invention.
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TL;DR: In this article, a method and an apparatus to analyze two measured signals that are modeled as containing desired and undesired portions such as noise, FM and AM modulation are presented, and coefficients relate the two signals according to a model defined in accordance with the present invention.
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Method and apparatus for estimating physiological parameters using model-based adaptive filtering
Clark R. Baker,Thomas J. Yorkey +1 more
TL;DR: In this paper, a method and apparatus for reducing the effects of noise on a system for measuring physiological parameters, such as, for example, a pulse oximeter, is presented. But it does not take into account the physical limitations on various physiological parameters being monitored when weighting and averaging a series of measurements.
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Pulse oximeter with parallel saturation calculation modules
Clark R. Baker,Thomas J. Yorkey +1 more
TL;DR: In this article, a method and apparatus for reducing the effects of noise on a system for measuring physiological parameters, such as, for example, a pulse oximeter, is presented. But it does not take into account the physical limitations on various physiological parameters being monitored when weighting and averaging a series of measurements.
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Method and apparatus for estimating a physiological parameter
Clark R. Baker,Thomas J. Yorkey +1 more
TL;DR: In this paper, a method and apparatus for reducing the effects of noise on a system for measuring physiological parameters, such as, for example, a pulse oximeter, is presented. But it does not take into account the physical limitations on various physiological parameters being monitored when weighting and averaging a series of measurements.
References
More filters
Journal ArticleDOI
Adaptive comb filtering for harmonic signal enhancement
Arye Nehorai,Boaz Porat +1 more
TL;DR: Results of simulations indicate that the variances of the estimates are of the same order of magnitude as the CRB for sufficiently large data sets, and illustrate the performance in enhancing noisy artificial periodic signals.
Journal ArticleDOI
Explicit formulas for the synthesis of optimum broad-band impedance-matching networks II
Wai-Kai Chen,K. Kourounis +1 more
TL;DR: The paper shows that the most practical RLC load can be optimally matched to a resistive generator over a finite frequency band to achieve the Butterworth or Chebyshev transducer power-gain characteristic of arbitrary order.