Manuel Duarte Ortigueira

73 papers Misc 4Journal 52Unranked 16
YearRankTypeTitle / Venue / Authors
2024 J jnl
A Factory of Fractional Derivatives.
Symmetry
Manuel Duarte Ortigueira
2024 J jnl
On Lebesgue Constants.
Axioms
Manuel Duarte Ortigueira, Gabriel Bengochea
2024 J jnl
Principles of fractional signal processing.
Digit. Signal Process.
Manuel Duarte Ortigueira
2024 J jnl
The causal
Int. J. Syst. Sci.
Gabriel Bengochea, Manuel Duarte Ortigueira, Luis Verde-Star
2023 — conf
Trans-Boolean Cyber Physical Systems.
DoCEIS
Francisco Neves, Raul Tello Rato, Manuel Duarte Ortigueira
2022 J jnl
A Preliminary Exploration of the Placental Position Influence on Uterine Electromyography Using Fractional Modelling.
Sensors
Müfit San, Arnaldo Batista, Sara Russo, Filipa Esgalhado, Catarina R. Palma dos Reis, Fátima C. Serrano, Manuel Duarte Ortigueira
2022 J jnl
Adaptive Filtering for the Maternal Respiration Signal Attenuation in the Uterine Electromyogram.
Sensors
Daniela Martins, Arnaldo Batista, Helena Mouriño, Sara Russo, Filipa Esgalhado, Catarina R. Palma dos Reis, Fátima C. Serrano, Manuel Duarte Ortigueira
2022 J jnl
Electrohysterography extracted features dependency on anthropometric and pregnancy factors.
Biomed. Signal Process. Control.
Martim Almeida, Helena Mouriño, Arnaldo G. Batista, Sara Russo, Filipa Esgalhado, Catarina R. Palma dos Reis, Fátima C. Serrano, Manuel Duarte Ortigueira
2022 J jnl
Fractional derivative of power type functions.
Comput. Appl. Math.
Gabriel Bengochea, Manuel Duarte Ortigueira
2022 J jnl
On the Feasibility of Real-Time HRV Estimation Using Overly Noisy PPG Signals.
Comput.
Filipa Esgalhado, Valentina Vassilenko, Arnaldo Batista, Manuel Duarte Ortigueira
2022 J jnl
Peak Detection and HRV Feature Evaluation on ECG and PPG Signals.
Symmetry
Filipa Esgalhado, Arnaldo Batista, Valentina Vassilenko, Sara Russo, Manuel Duarte Ortigueira
2022 — conf
Real-Time PPG-Based HRV Implementation Using Deep Learning and Simulink.
DoCEIS
Filipa Esgalhado, Arnaldo Batista, Valentina Vassilenko, Manuel Duarte Ortigueira
2021 J jnl
Bilateral Tempered Fractional Derivatives.
Symmetry
Manuel Duarte Ortigueira, Gabriel Bengochea
2021 — conf
Improvements on Signal Processing Algorithm for the VOPITB Equipment.
DoCEIS
Filipa E. Cardoso, Valentina Vassilenko, Arnaldo Batista, Paulo Bonifácio, Sergio Rico Martin, Juan Muñoz-Torrero, Manuel Duarte Ortigueira
2021 J jnl
The contractiongram: A method for the visualization of uterine contraction evolution using the electrohysterogram.
Biomed. Signal Process. Control.
Arnaldo G. Batista, Ricardo Cebola, Filipa Esgalhado, Sara Russo, Catarina R. Palma dos Reis, Fátima C. Serrano, Valentina Vassilenko, Manuel Duarte Ortigueira
2020 — conf
Idle Tone Detection in Biomedical Signals Using Time-Frequency Techniques.
DoCEIS
Filipa E. Cardoso, Arnaldo Batista, Valentina Vassilenko, Andreia Serrano, Manuel Duarte Ortigueira
2020 J jnl
On the properties of some operators under the perspective of fractional system theory.
Commun. Nonlinear Sci. Numer. Simul.
Manuel Duarte Ortigueira, J. Tenreiro Machado
2020 J jnl
Uterine contractions clustering based on electrohysterography.
Comput. Biol. Medicine
Filipa Esgalhado, Arnaldo Batista, Helena Mouriño, Sara Russo, Catarina R. Palma dos Reis, Fátima C. Serrano, Valentina Vassilenko, Manuel Duarte Ortigueira
2019 J jnl
Variable order fractional systems.
Commun. Nonlinear Sci. Numer. Simul.
Manuel Duarte Ortigueira, Duarte Valério, J. Tenreiro Machado
2018 J jnl
A critical analysis of the Caputo-Fabrizio operator.
Commun. Nonlinear Sci. Numer. Simul.
Manuel Duarte Ortigueira, J. Tenreiro Machado
2018 J jnl
Corrigendum to "On the computation of the multidimensional Mittag-Leffler function" [Commun. Nonlinear Sci. Numer. Simulat. 53 (2017) 278-287].
Commun. Nonlinear Sci. Numer. Simul.
Manuel Duarte Ortigueira, António M. Lopes, J. A. Tenreiro Machado
2018 J jnl
Reducing bias in fractional order impedance estimation for lung function evaluation.
Biomed. Signal Process. Control.
Dana Copot, Robin De Keyser, Eric Derom, Manuel Duarte Ortigueira, Clara M. Ionescu
2017 J jnl
On the computation of the multidimensional Mittag-Leffler function.
Commun. Nonlinear Sci. Numer. Simul.
Manuel Duarte Ortigueira, António M. Lopes, J. A. Tenreiro Machado
2016 J jnl
A multichannel time-frequency and multi-wavelet toolbox for uterine electromyography processing and visualisation.
Comput. Biol. Medicine
Arnaldo Batista, Shirin Najdi, Daniela M. Godinho, Catarina Martins, Fátima C. Serrano, Manuel Duarte Ortigueira, Raul Tello Rato
2016 J jnl
Exponentials and Laplace transforms on nonuniform time scales.
Commun. Nonlinear Sci. Numer. Simul.
Manuel Duarte Ortigueira, Delfim F. M. Torres, Juan J. Trujillo
2015 J jnl
A generalized power series and its application in the inversion of transfer functions.
Signal Process.
Manuel Duarte Ortigueira, Juan J. Trujillo, Valery I. Martynyuk, Fernando J. V. Coito
2015 J jnl
Comments on "Discretization of fractional order differentiator over Paley-Wiener space".
Appl. Math. Comput.
Manuel Duarte Ortigueira
2015 J jnl
Discrete-time differential systems.
Signal Process.
Manuel Duarte Ortigueira, Fernando J. V. Coito, Juan J. Trujillo
2015 J jnl
Fractional model of an electrochemical capacitor.
Signal Process.
Valeriy Martynyuk, Manuel Duarte Ortigueira
2015 J jnl
Fractional signal processing and applications.
Signal Process.
Manuel Duarte Ortigueira, Clara M. Ionescu, J. Tenreiro Machado, Juan J. Trujillo
2015 J jnl
From a generalised Helmholtz decomposition theorem to fractional Maxwell equations.
Commun. Nonlinear Sci. Numer. Simul.
Manuel Duarte Ortigueira, Margarita Rivero, Juan J. Trujillo
2015 J jnl
Integer/fractional decomposition of the impulse response of fractional linear systems.
Signal Process.
Manuel Duarte Ortigueira, J. Tenreiro Machado, Margarita Rivero, Juan J. Trujillo
2015 J jnl
What is a fractional derivative?
J. Comput. Phys.
Manuel Duarte Ortigueira, J. A. Tenreiro Machado
2014 J jnl
A simple approach to the particular solution of constant coefficient ordinary differential equations.
Appl. Math. Comput.
Manuel Duarte Ortigueira
2014 J jnl
Comments on "The fractional Laplace transform".
Signal Image Video Process.
Manuel Duarte Ortigueira
2014 J jnl
On the Recursive Solution to the Normal Equations: Some Other Results [Lecture Notes].
IEEE Signal Process. Mag.
Manuel Duarte Ortigueira
2014 J jnl
On the particular solution of constant coefficient fractional differential equations.
Appl. Math. Comput.
Manuel Duarte Ortigueira
2013 — conf
ARMA Modelling for Sleep Disorders Diagnose.
DoCEIS
João Caldas da Costa, Manuel Duarte Ortigueira, Arnaldo Batista, Teresa Paiva
2012 — conf
A New Approach to Rational Discrete-Time Approximations to Continuous-Time Fractional-Order Systems.
DoCEIS
Carlos J. C. Matos, Manuel Duarte Ortigueira
2012 J jnl
A real regularised fractional derivative.
Signal Image Video Process.
Manuel Duarte Ortigueira, Richard L. Magin, Juan J. Trujillo, M. Pilar Velasco
2012 — conf
Short Time Fourier Transform and Automatic Visual Scoring for the Detection of Sleep Spindles.
DoCEIS
João Caldas da Costa, Manuel Duarte Ortigueira, Arnaldo Batista
2012 J jnl
The Incremental Ratio Based Causal fractional Calculus.
Int. J. Bifurc. Chaos
Manuel Duarte Ortigueira, Margarita Rivero, Juan J. Trujillo
2011 — conf
ARMA Modelling of Sleep Spindles.
DoCEIS
João Caldas da Costa, Manuel Duarte Ortigueira, Arnaldo Batista
2011 — book
Fractional Calculus for Scientists and Engineers
Manuel Duarte Ortigueira
2011 J jnl
Fractional signals and systems.
Signal Process.
Manuel Duarte Ortigueira, J. A. Tenreiro Machado, Juan J. Trujillo, Blas M. Vinagre
2011 J jnl
On the fractional signals and systems.
Signal Process.
Richard L. Magin, Manuel Duarte Ortigueira, Igor Podlubny, Juan J. Trujillo
2010 — conf
A Contribution for the Automatic Sleep Classification Based on the Itakura-Saito Spectral Distance.
DoCEIS
Eduardo Cardoso, Arnaldo Batista, Rui Rodrigues, Manuel Duarte Ortigueira, Cristina Bárbara, Cristina Martinho, Raul Tello Rato
2010 — conf
Fractional Filters: An Optimization Approach.
DoCEIS
Carlos J. C. Matos, Manuel Duarte Ortigueira
2010 — conf
MicroECG: An Integrated Platform for the Cardiac Arrythmia Detection and Characterization.
DoCEIS
Bruno Nascimento, Arnaldo Batista, Luis Brandão Alves, Manuel Duarte Ortigueira, Raul Tello Rato
2010 J jnl
On the Fractional Linear Scale Invariant Systems.
IEEE Trans. Signal Process.
Manuel Duarte Ortigueira
2010 J jnl
System initial conditions vs derivative initial conditions.
Comput. Math. Appl.
Manuel Duarte Ortigueira, Fernando J. V. Coito
2009 — conf
On the Linear Scale Fractional Systems - An Application of the Fractional Quantum Derivative.
ICINCO-SPSMC
Manuel Duarte Ortigueira
2007 J jnl
Wireless Systems New quasi-orthogonal BCH-derived sequences for CDMA applications.
Eur. Trans. Telecommun.
Cesaltina N. E. Ricardo, Manuel Duarte Ortigueira, José António Beltran Gerald
2006 J jnl
A coherent approach to non-integer order derivatives.
Signal Process.
Manuel Duarte Ortigueira
2006 J jnl
A new least-squares approach to differintegration modeling.
Signal Process.
Manuel Duarte Ortigueira, António Joaquim Serralheiro
2006 J jnl
Fractional calculus applications in signals and systems.
Signal Process.
Manuel Duarte Ortigueira, José António Tenreiro Machado
2006 J jnl
Riesz potential operators and inverses via fractional centred derivatives.
Int. J. Math. Math. Sci.
Manuel Duarte Ortigueira
2005 J jnl
New PN Even Balanced Sequences for Spread-Spectrum Systems.
EURASIP J. Wirel. Commun. Netw.
José A. L. Inácio, José António Beltran Gerald, Manuel Duarte Ortigueira
2003 J jnl
A new symmetric fractional B-spline.
Signal Process.
Manuel Duarte Ortigueira
2003 — conf
Efficient digital self-calibration of video-rate pipeline ADCs using white Gaussian noise.
ISCAS (1)
M. Unterweissacher, João Goes, Nuno F. Paulino, Guiomar Evans, Manuel Duarte Ortigueira
2003 J jnl
Fractional signal processing and applications.
Signal Process.
Manuel Duarte Ortigueira, José António Tenreiro Machado
2003 — conf
Low-voltage low-power CMOS analogue circuits for Gaussian and uniform noise generation.
ISCAS (1)
Guiomar Evans, João Goes, Adolfo Steiger-Garção, Manuel Duarte Ortigueira, Nuno F. Paulino, Jilseph Lopes Silva
2003 J jnl
On the initial conditions in continuous-time fractional linear systems.
Signal Process.
Manuel Duarte Ortigueira
2001 — conf
A signal processing view of differintegration.
ECC
Manuel Duarte Ortigueira, Arnaldo G. Batista
2001 — conf
New results on fractional linear prediction.
ECC
Manuel Duarte Ortigueira, Carlos J. C. Matos
2001 J jnl
The comb signal and its Fourier transform.
Signal Process.
Manuel Duarte Ortigueira
1997 Misc conf
Fractional discrete-time linear systems.
ICASSP
Manuel Duarte Ortigueira
1996 J jnl
A new algorithm for the factorization and inversion of recursively generated matrices.
Signal Process.
Manuel Duarte Ortigueira
1993 J jnl
ARMA realization from the reflection coefficient sequence.
Signal Process.
Manuel Duarte Ortigueira
1991 J jnl
Eigendecomposition versus singular value decomposition in adaptive array signal processing.
Signal Process.
Manuel Duarte Ortigueira, Miguel Angel Lagunas
1990 Misc conf
A weighted min-norm method with a recursive implementation.
ICASSP
Manuel Duarte Ortigueira, Miguel Angel Lagunas
1984 Misc conf
A framework for the evaluation of spectral analysis techniques.
ICASSP
Manuel Duarte Ortigueira, José M. Tribolet
1983 Misc conf
On the double Levinson recursion formulation of ARMA spectral estimation.
ICASSP
Manuel Duarte Ortigueira, José M. Tribolet