Manuel Alberto Reis de Oliveira Violas

Manuel Violas

Academic position:	Assistant Professor
Joining date:	01-01-1999
Roles in IT:	Senior Researcher
Scientific Area:	Optical Communications
Group:	Optical Communications Systems – Av

Email: Send Email
Address: IT – Aveiro
Instituto de Telecomunicações
Campus Universitário de Santiago
P-3810-193 AVEIRO - PORTUGAL
Tel: +351 234 377 900
Fax: +351 234 377 901

https://www.orcid.org/0000-0003-1240-6430

Scientific Achievements

Degrees

PhD, Universidade de Aveiro, 01-01-1999

Academic Activities

Supervision of theses

1PhD Student

Research on Nonlinearities in Radio over Fiber, PhD Student, Zhansheng Liu, Defended 04-2014

Co-Supervision of theses

1PhD Student

“Cooperative Positioning for Heterogeneous Wireless Systems”, PhD Student, Senka Hadzic, Defended 02-2014

2MSc Student

Implementação e Avaliação em FPGAs de um Sistema Cooperativo para os Futuros Sistemas 5G, MSc Student, JOAQUIM TEIXEIRA MELIM, Expected conclusion 07-2020
Implementação numa FPGA de Técnicas MIMO Projectadas para Sistemas de 4G, MSc Student, TIAGO MIGUEL DE PINA CORREIA, Concluded 12-2013

Publications

20Papers in Journals

A. Esfahani, G. Mantas, JCR Ribeiro, J. B. Bastos, S.M. Mumtaz, M. Violas, A. M. O. D. Duarte, J. Rodriguez, An Efficient Web Authentication Mechanism Preventing Man-In-The-Middle Attacks in Industry 4.0 Supply Chain, IEEE Access, Vol. Roadmap to 5G: Rising to the Challenge, No. 09595, pp. 1 - 10, April, 2019 | BibTex
M. Violas, Modeling and simulation of RSOA with a dual-electrode configuration, Microwave and Optical Tech. Letters, Vol. 59, No. 8, pp. 1824 - 1828, May, 2017 | BibTex
M. Violas, J.L. Lourenço, A. Silva, A. Gameiro, AN OFDM Platform for Wireless Systems Testing: Alamouti 2x1 MIMO Example, WSEAS Trans. on Communications, Vol. 13, No. 1, pp. 672 - 682, December, 2014,
| Abstract | BibTex
S. Hadzic, D. Yang, J. Rodriguez, M. Violas, RSS-based Near-Collinear Anchor aided Positioning Algorithm for Ill-conditioned Scenario, Wireless Communications and Mobile Computing, Vol. 2, No. 1, pp. 18 - 18, November, 2014 | BibTex
W. Dghais Dghais, V. M. C. Ribeiro, Z. Liu, Z. Vujicic, M. Violas, A. Teixeira, Efficient RSOA Modelling using Polar Complex-Valued Neural Networks, Optics Communications, Vol. ?, No. ?, pp. 1 - 4, September, 2014,
| Abstract | BibTex
S. Hadzic, D. Yang, M. Violas, J. Rodriguez, Energy Efficient Mobile Tracking in Heterogeneous Networks using Node Selection, Eurasip Journal on Wireless Communications and Networking, Vol. 2014, No. 2, pp. 1 - 10, January, 2014 | BibTex
T. Pereira, M. Violas, J.L. Lourenço, A. Gameiro, A. Silva, C. Ribeiro, An FPGA Implementation of OFDM Transceiver for LTE Applications, Intrnl. Journal On Advances in Systems and Measurements, Vol. 6, No. 1-2, pp. 224 - 234, June, 2013,
| Abstract | Full text (PDF 958 KBs) | BibTex
Z. Liu, M. Violas, N.B.C. Carvalho, Modeling and Simulation of a Reflective Semiconductor Optical Amplifier Modulator Using X-Parameters®, IEEE Photonics Technology Letters, Vol. 25, No. 3, pp. 272 - 274, February, 2013 | BibTex
Z. Liu, M. Violas, N.B.C. Carvalho, Wideband Dynamic Behavioral Modeling of Reflective Semiconductor Optical Amplifiers Using a Tapped-Delay Multilayer Perceptron, Optics Express, Vol. 21, No. 3, pp. 3354 - 3362, February, 2013 | BibTex
Z. Liu, M. Violas, N.B.C. Carvalho, Analysis on Dynamic Characteristics of Reflective Semiconductor Optical Amplifier Based on a Memory Polynomial Model, Microwave and Optical Tech. Letters, Vol. 54, No. 3, pp. 805 - 808, March, 2012,
| Abstract | BibTex
D. Wake, A. Nkansah, P. Assimakopoulos, N. J. G. Gomes, M. Violas, Z. Liu, S. Pato, F. M. Ferreira, G. Valicourt, R. Brenot, Rádio sobre Fibra, Revista RTI - Redes, Telecom e Instalações, Vol. -, No. -, pp. 52 - 63, November, 2011 | BibTex
Z. Liu, M. Violas, N.B.C. Carvalho, Digital Predistortion for RSOAs as External Modulators in Radio over Fiber Systems, Optics Express, Vol. 19, No. 18, pp. 17641 - 17646, August, 2011,
| Abstract | BibTex
Z. Liu, M. Sadeghi, G. Valicourt, R. Brenot, M. Violas, Experimental Validation of a Reflective Semiconductor Optical Amplifier Model Used as a Modulator in Radio Over Fiber Systems, IEEE Photonics Technology Letters, Vol. 23, No. 9, pp. 576 - 578, May, 2011,
| Abstract | BibTex
M. Violas, D. Wake, F. Van Dijk, F. Van Dijk, C. Ware, A. Enard, D. Make, Z. Liu, M. Lamponi, R. Brenot, Radio-Over-Fiber Access Network Architecture Based on New Optimized RSOA Devices With Large Modulation Bandwidth and High Linearity, IEEE Transactions on Microwave Theory and Techniques, Vol. 58, No. 11, pp. 3248 - 3258, November, 2010,
| Abstract | BibTex
G. Valicourt, F. Pommereau, F. Poingt, M. Lamponi, G. H. Duan, M. Violas, R. Brenot, Chirp Reduction in Directly Modulated Multi-Electrode RSOA Devices in Passive Optical Networks, IEEE Photonics Technology Letters, Vol. 22, No. 19, pp. 1425 - 1427, October, 2010,
| Abstract | BibTex
D. Wake, A. Nkansah, N. J. G. Gomes, G. Valicourt, R. Brenot, M. Violas, Z. Liu, F. M. Ferreira, S. Pato, A Comparison of Radio over Fiber Link Types for the Support of Wideband Radio Channels, Journal of Lightwave Technology, Vol. 28, No. 16, pp. 2416 - 2422, August, 2010,
| Abstract | BibTex
M. V. Drummond, R.N. Nogueira, M. Violas, P. Monteiro, C. Sterner, P.-Y. Fonjallaz, All-Optical generation of 40 Gb/s Single Sideband Signals Using a Fiber Bragg Grating, Optics Communications, Vol. 283, No. 12, pp. 2492 - 2495, June, 2010,
| Abstract | BibTex
M. V. Drummond, R.N. Nogueira, P. Monteiro, M. Violas, C. Sterner, P.-Y. Fonjallaz, Tunable Optical Dispersion Compensator based on Power Splitting between Two Dispersive Media, Journal of Lightwave Technology, Vol. 28, No. 8, pp. 1164 - 1175, April, 2010,
| Abstract | BibTex
M. Madureira, D. Fonseca, M. Violas, R. Aguiar, A. Cartaxo, P. Monteiro, Postdetection adjustable simultaneous compensation of DGD and GVD in a 40-Gb/s optical single-sideband system, IEEE Photonics Technology Letters, Vol. 19, No. 18, pp. 1356 - 1358, September, 2007 | BibTex
Luís M. R. Teixeira, P. Monteiro, M. Violas, A. Teixeira, J. M. Santos, Adaptive Chromatic Dispersion Compensation Using Electrical Transversal Filters, Revista do Departamento de Electrónica e de Telecomunicações, Universidade de Aveiro, Vol. 4, No. 2, pp. 186 - 190, January, 2004 | BibTex

30Papers in Conferences

M. Violas, J. Carvalho, D. Castanheira, A. Gameiro, Development and Evaluation of an OFDM Radar in a FPGA, IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM), Victorioa, Canada, Vol., pp. -, August, 2019 | BibTex
T.P. Pereira, M. Violas, A. Gameiro, C. Ribeiro, J.L. Lourenço, Real Time FPGA based Testbed for OFDM Development with ML synchronization, IARIA International Conf. on Systems and Networks Communications - ICNS, Lisbon, Portugal, Vol. 1, pp. 1 - 5, November, 2012,
| Abstract | BibTex
Z. Liu, M. Violas, N.B.C. Carvalho, Transmission of Four Channels SCM Over Fiber and Nonlinear Compensation for RSOA External Modulators, IEEE GLOBECOM Workshops: Distributed Antenna Systems for Broadband Mobile Communication, Houston, United States, Vol. -, pp. 1 - 5, December, 2011,
| Abstract | BibTex
Z. Liu, M. Violas, M. Sadeghi, G. Valicourt, 4 Channels Subcarrier Multiplexing Optical Link Using an RSOA Modulator, IEEE International Topical Meeting on Microwave Photonics, Montreal, Canada, Vol. --, pp. 128 - 130, October, 2010,
| Abstract | BibTex
D. Wake, A. Nkansah, N. J. G. Gomes, M. Violas, Z. Liu, S. Pato, F. M. Ferreira, G. Valicourt, R. Brenot, Design and Performance of Radio over Fibre Links for Next Generation Wireless Systems using Distributed Antennas, Future Network and Mobile Summit, Florence, Italy, Vol. --, pp. -- - --, June, 2010,
| Abstract | BibTex
M. V. Drummond, R.N. Nogueira, P. Monteiro, M. Violas, P.-Y. Fonjallaz, Novel Opto-Electrical Tunable Dispersion Compensator for IM Signals, European Conf. on Optical Communications - ECOC, Vienna, Austria, Vol. P3.06, pp. 1 - 2, September, 2009,
| Abstract | BibTex
R.N. Nogueira, M. V. Drummond, C. Marques, A. Teixeira, P.S André, M. Violas, P. Monteiro, P.-Y. Fonjallaz, All-optical signal processing techniques with fiber based devices, International Conf. on Transparent Networks – ICTON, Azores, Portugal, Vol. -, pp. - - -, July, 2009 | BibTex
R.N. Nogueira, M. V. Drummond, M. Violas, P. Monteiro, Tunable Passive Compensating Devices for High Bit Rate Optical Systems, International Conf. on Transparent Networks – ICTON, Athens, Greece, Vol. Th.B1.2, pp. 266 - 269, July, 2008,
| Abstract | BibTex
P. Monteiro, M. Madureira, D. Fonseca, R. Aguiar, A. Cartaxo, M. Violas, Optical Channel Impairments Mitigation on 40 Gb/s Systems Resorting to Post-Detection Adjustable Electrical Compensation, International Conf. on Transparent Networks – ICTON, Rome, Italy, Vol. 1, pp. 20 - 23, July, 2007 | BibTex
R. Aguiar, P. Monteiro, M. Madureira, D. Fonseca, A. Cartaxo, M. Violas, Electronic dispersion compensation solution for high-speed optical fiber communications, Symp. on Innovative Lightwave Technology Evolution for 100GbE Services, 0, Japan, Vol. 0, pp. 0 - 0, March, 2007 | BibTex
D. Fonseca, A. Cartaxo, P. Monteiro, T. Silveira, A. Ferreira, M. Violas, 40 Gbit/s OSSB-NRZ transmitter for high capacity systems, European Conf. on Optical Communications - ECOC, Glasgow, United Kingdom, Vol. 4, pp. 787 - 788, September, 2005 | BibTex
A.P.S. Ferreira, T. Silveira, R. Ribeiro, P. Monteiro, M. Violas, A. Teixeira, Mitigation of Chromatic Dispersion Effects on Optical Single Sideband Signals by Butterworth Filtering, International Conf. on Transparent Networks – Mediterranean Winter - ICTON MW, Barcelona, Spain, Vol. 2, pp. 76 - 79, July, 2005 | BibTex
P. Montero, M. Violas, R. Ribeiro, Luís M. R. Teixeira, M. Madureira, R. Aguiar, R. F. Rocha, Adaptive Electronic Equalizers for Very High Speed Optical Communication Systems, Symp. on Enabling Optical Networks - SEON, Aveiro, Portugal, Vol. 1, pp. 2 - 3, June, 2005 | BibTex
R. Aguiar, M. Madureira, M. Violas, P. Monteiro, An Electrically Adjustable Distributed Pulse Shaping Filter for 40-Gbit/s Optical Links, IEEE International Symp. on Circuits and Systems - ISCAS, Kobe, Japan, Vol. 1, pp. 1 - 1, May, 2005 | BibTex
R. Aguiar, M. Madureira, P. Monteiro, M. Violas, Practical Implementations Of Monolithic Transversal Filters For Electric Dispersion Compensation On High-Speed Optical Links, Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. 0, pp. 0 - 0, May, 2005 | BibTex
A.P.S. Ferreira, T. Silveira, P. Monteiro, R. Ribeiro, M. Violas, R. F. Rocha, Robustness analysis of a 40Gb/s Optical Single Side Band Transmitter with electrical dispersion compensation, Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. cd, pp. cd - cd, April, 2005 | BibTex
Luís M. R. Teixeira, M. Violas, Feasibility of Transversal Filters for Adaptive Chromatic Dispersion Compensators in Multigigabit Optical Communication Systems, Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. 1, pp. - - -, April, 2005 | BibTex
M. Madureira, P. Monteiro, R. Aguiar, M. Violas, Practical implementaions of monolithic transversal filters for electric dispersion compensation on high-speed optical links, Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. 0, pp. 0 - 0, April, 2005 | BibTex
J. Machado, Luís M. R. Teixeira, M. Madureira, J. M. Santos, P. Monteiro, A. N. Pinto, M. Violas, Dynamic Electronic Dispersion Compensation for Efficient Micro & Millimetre Wave Optical Transceivers, Photonic Signal Processing for Defence Applications, Rome, Italy, Vol. -, pp. - - -, March, 2005 | BibTex
T. Silveira, A.P.S. Ferreira, P. Monteiro, M. Violas, R. Ribeiro, R. F. Rocha, Luís M. R. Teixeira, Electrical Dispersion Compensation at 10Gb/s Optical Single Sideband Transmission Systems, IEEE Lasers and Electro Optics Society Annual Meeting - LEOS, San Juan, Puerto Rico, Vol., pp. 759 - 760, November, 2004 | BibTex
P. Monteiro, Luís M. R. Teixeira, M. Violas, R. Ribeiro, A. Teixeira, R. F. Rocha, Adaptive Electronic Equalizers for Multigigabit Optical Communication Systems, International Symp. in Circuits and Systems, Linz, Austria, Vol. -, pp. 200 - 203, August, 2004 | BibTex
Luís M. R. Teixeira, P. Monteiro, M. Violas, A. Teixeira, Optical Signal Monitoring for Adaptive Equalization Using Transversal Filters, Symp. on Enabling Optical Networks - SEON, Porto, Portugal, Vol. 1, pp. 101 - 102, June, 2004 | BibTex
P. Monteiro, M. Violas, R. Ribeiro, R. F. Rocha, Electronic Post-detection Filter for Multigigabit Optical Communication Systems, IEEE International Symp. on Electron Devices for Microwave and Optoelectronics Applications, Orlando, United States, Vol. 03TH8691, pp. 192 - 197, November, 2003 | BibTex
T. Maia, R. Ribeiro, P. Monteiro, M. Violas, 10Gbit/s Optical Single Sideband Transmission using Zero Forcing Equalization, International Conf. on Wireless and Optical Communications - WOC, Banff, Canada, Vol. 1, pp. 104 - 109, July, 2003 | BibTex
T. Maia, M. Violas, P. Monteiro, R. Ribeiro, 10Gbit/s Optical Single Sideband Transmitter, Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. 1, pp. 241 - 244, June, 2003 | BibTex
R. Aguiar, M. Madureira, P. Monteiro, M. Violas, M. Gloanec, E. Leclerc, B. Lefebvre, Broadband Optical Receiver for Multigigabit-per-second (40Gb/s) Optical Communication Systems in 0.135ƒÝm PHEMT technology, IEEE International Symp. on Circuits and Systems - ISCAS, Bangkoq, Thailand, Vol. 1, pp. 409 - 412, May, 2003 | BibTex
R. Aguiar, M. Madureira, P. Monteiro, M. Violas, M. Gloanec, E. Leclerc, B. Lefebvre, High Gain GaAs 10Gbps Receiver with Integrated Bondwire Effects, IEEE International Symp. on Circuits and Systems - ISCAS, Bangkoq, Thailand, Vol. 1, pp. 173 - 176, March, 2003 | BibTex
R. Aguiar, M. Madureira, P. Monteiro, M. Violas, M. Gloanec, E. Leclerc, B. Lefebvre, Broadband Optical Receiver for Multigigabit-per-second (40Gb/s) Optical Communications Systems, IEEE International Symp. on Electron Devices for Microwave and Optoelectronics Applications, Manchester, United Kingdom, Vol. 1, pp. 271 - 275, November, 2002 | BibTex
P. Monteiro, M. Violas, R. Ribeiro, R. F. Rocha, Active Distributed Transversal Filters for Multigigabit Optical Communication Systems, International Workshop on Microwave Filters, Touluse, France, Vol. -, pp. - - -, June, 2002 | BibTex
P. Monteiro, R. Ribeiro, M. Violas, R. F. Rocha, 40 Gbit/s GaAs MMIC Signal Processor for Optical Communication Systems, Gallium Arsenide Applications Symp. - GAAS, London, United Kingdom, Vol. -, pp. 615 - 618, September, 2001 | BibTex

Patents

1Patents

R.N. Nogueira, M. Violas, M. V. Drummond, FILTRO ÓPTICO COM RESPOSTA SINTONIZÁVEL DE FORMA CONTÍNUA BASEADO NA COMBINAÇÃO DE DIFERENTES FILTROS ÓPTICOS, PT104237, -1, (status pending)

Projects

Currently running projects4

Acronym	Name	Funding Agency	Start date	Ending date
5G	SI I&DT Copromoção Nr. 024539 - Componentes e serviços para redes 5G	P2020	01-01-2018	31-12-2020
MASSIVE5G	Multi-band Access Strategies for 5G Cooperative Networks	FCT/POCI	01-06-2018	01-05-2021
ORCIP	Optical Radio Convergence Infrastructure for Communications and Power Delivering	PO Centro	01-05-2017	30-04-2029
RETIOT	Utilização de Tecnologias de Reflectometría no melhoramento do futuro Internet das Coisas e Sistemas Ciber-Físicos	P2020	09-01-2017	08-01-2021

Closed Projects19

Acronym	Name	Funding Agency	Start date	Ending date
ATLAS	All-optical Terabit per second Lambda-Shifted transmission	EU	01-01-2000	31-12-2002
BENEFIC	Best ENergy EFficiency solutions for heterogeneous multI-core Communicating systems	QREN	01-01-2014	01-06-2015
CelCop	Multicell Cooperation for Future Wireless Systems	IT/LA	01-06-2011	01-10-2013
COPWIN	Coordinated MultiPoint Strategies for Future Wireless Networks	FCT/PTDC	01-07-2013	01-01-2016
CROWN	Co-operative Radio over Fibre for Wireless Networks	FCT/PTDC	01-03-2011	01-02-2014
DiNEq	Digital Nonlinear Equalization in Very-High Speed Coherent Optical Transmission Systems	FCT/PTDC	01-07-2013	01-06-2015
DiRecTRadio	All-Digital Reconfigurable System-on-Chip Transmitter for Cognitive Radio Systems	IT/LA	01-07-2011	01-06-2013
ETOBLU	Terminal Optical Equipments for Single Side Band	ADI	01-09-2003	28-02-2005
ETOBLU	Terminal Equipments for Optical Single Side Band Transmission	Siemens Networks SA	01-10-2004	31-12-2006
FUTON	Fibre Optic Networks for Distributed, Extendible Heterogeneous Radio Architectures and Service Provisioning	EU/FP7	01-01-2008	01-06-2010
FUTON	Fibre Optic Networks for Distributed, Extendible Heterogeneous Radio Architectures and Service Provisioning	EU/FP7	01-01-2008	01-06-2010
HETCOP	Joint Cooperative and Cognitive Strategies for Heterogeneous Wireless Systems	IT/LA	01-04-2014	01-07-2016
ISIS	InfraStructures for broadband access in wireless/photonics and Integration of Strengths in Europe	EU	01-01-2006	31-12-2008
OPTRONET	OPtimized Transponders for Robust NETworks	ADI, Nokia Siemens Networks SA	01-01-2006	30-06-2008
OPTRONET	OPtimized Transponders for Robust Optical NETworks	ADI	01-01-2006	01-06-2008
PHOTON	Distributed and Extendible Heterogeneous Radio Architectures using	FCT/PTDC	01-11-2007	01-11-2010
PURE-5GNET	Cooperative Multi-band Access Strategies for 5G Ultra Dense Networks	IT, FCT	01-04-2016	01-09-2018
THE MOST	Transimpedance Highly Efficient Micro & millimetrewave Optical Smart Transceiver	ADI	01-01-2003	31-12-2006
TOBLU	Single Side Band Optical Transmission	FCT/POSI	01-01-2001	30-06-2004

Other Scientific Achievements

1Prototypes

P. Monteiro, T. Maia, M. Violas, R. Ribeiro, R. F. Rocha, 10 Gbit/s Optical Single Side Band Transmission System

IT Member Profile