Creating and sharing knowledge for telecommunications

IT Member Profile

... Fernando de Sousa

Researcher

Fernando Sousa

Academic position: Associate Professor
Joining date: 01-01-1999
Roles in IT: Researcher
Thematic Line: Wireless Technologies
Group: Radio Systems – Lx

Email: Send Email
Address: IT – Lisboa
Instituto Superior Técnico - Torre Norte - Piso 10
Av. Rovisco Pais, 1
1049 - 001 Lisboa
Tel: +351 21 841 84 54
Fax: +351 21 841 84 72

ORCID iD
https://www.orcid.org/0000-0003-2520-7553

SCOPUS

Bio

Fernando Sousa received his B.Sc. in Electronics and Telecommunications Engineering from Instituto Superior de Engenharia de Lisboa (ISEL) and his E.E., M.Sc., and Ph.D. degrees in Electrical and Computer Engineering from the Instituto Superior Técnico (IST), University of Lisbon, Portugal. He is currently a coordinator professor at the Electronics, Telecommunications and Computer Engineering Department, ISEL, and researcher with the Communication Theory Group at the Instituto de Telecomunicações in Lisbon.

Scientific Achievements

  • PhD, Instituto Superior Técnico, 22-05-2014
  • MSc, Instituto Superior Técnico, 31-03-1993
  • Licenciatura, Instituto Superior Técnico, 31-12-1985
  • Undergraduate, Instituto Superior de Engenharia de Lisboa, 31-12-1983
  • Instituto Superior de Engenharia de Lisboa (ISEL), 01-01-1983, Professor-coordenador
10Papers in Journals
  • F. Nunes, F. Sousa, Efficient Signal Quality Monitoring of GNSS Signals Disturbed by Evil Waveforms, NAVIGATION: Journal of the Institute of Navigation, Vol. 71, No. 4, pp. navi.668 - navi.668, October, 2024,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, Deep Learning Soft-Decision GNSS Multipath Detection and Mitigation, Sensors, Vol. 24, No. 14, pp. 4663 - 4663, July, 2024,
    | Abstract     | Full text (PDF 557 KBs) | BibTex
  • F. Nunes, F. Sousa, J. M. Marçal, Multi-Frequency Simulation of Ionospheric Scintillation Using a Phase-Screen Model, NAVIGATION: Journal of the Institute of Navigation, Vol. 69, No. 4, pp. 1 - 22, December, 2022,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Characterization and performance analysis of generalized BOC modulations for GNSS, NAVIGATION: Journal of the Institute of Navigation, Vol. 66, No. 1, pp. 1 - 13, April, 2019,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, Generalized Gamma Fading Simulation of Scintillation Disturbed GNSS Signals, IEEE Transactions on Aerospace and Electronic Systems, Vol. 54, No. 4, pp. 2025 - 2034, August, 2018,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, GNSS Blind Interference Detection Based on Fourth-Order Autocumulants, IEEE Transactions on Aerospace and Electronic Systems, Vol. 52, No. 5, pp. 2576 - 2588, October, 2016,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, New Expressions for the Autocorrelation Function of BOC GNSS Signals, NAVIGATION: Journal of the Institute of Navigation, Vol. -60, No. -1, pp. -1 - -9, March, 2013,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, GNSS Near-Far Mitigation through Subspace Projection without Phase Information, IEEE Transactions on Aerospace and Electronic Systems, Vol. 48, No. 3, pp. 2746 - 2755, July, 2012,
    | Abstract     | BibTex
  • F. Nunes, J. Leitão, F. Sousa, Nonlinear Filtering in GNSS Pseudorange Dynamics Estimation Combining Code Delay and Carrier Phase, IEEE Journal on Selected Topics in Signal Processing, Vol. 3, No. 4, pp. 639 - 650, August, 2009,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Gating Functions for Multipath Mitigation in GNSS BOC Signals, IEEE Transactions on Aerospace and Electronic Systems, Vol. 43, No. 3, pp. 951 - 964, July, 2007,
    | Abstract     | BibTex
59Papers in Conferences
  • A. Negrinho, P. Boto, P. Fernandes, V. Mendonça, F. Nunes, F. Sousa, Signal Quality Monitoring Aspects in GNSS Signals Affected by Evil Waveforms, Institute of Navigation GPS/GNSS Conf., Denver, CO, United States, Vol., pp. 3947 - 3958, September, 2022,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, Performance of GNSS Evil Waveform Detectors in the Presence of Multipath, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Conference online, April, 2022,
    | Abstract     | Full text (PDF 506 KBs) | BibTex
  • F. Sousa, F. Nunes, A. Negrinho, P. Fernandes, P. Boto, Signal Quality Monitoring Aspects in GNSS Signals Affected by Evil Waveforms, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Conference online, April, 2022,
    | Abstract     | BibTex
  • A. Negrinho, P. Fernandes, P. Boto, F. Nunes, F. Sousa, Evil Waveforms Detection Solutions for Autonomous Navigation Integrity, Institute of Navigation Institute of Navigation GPS/GNSS Conf. ION GNSS, St. Louis, United States, Vol. 1, pp. 4097 - 4115, September, 2021,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, State-space Estimation of Ionospheric Scintillation Processes with a Static GNSS Receiver, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, December, 2018,
    | Abstract     | Full text (PDF 526 KBs) | BibTex
  • F. Nunes, F. Sousa, J. M. Marçal, Statistical Characterization of Ionospheric Scintillation using a Phase-screen Model, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, December, 2018,
    | Abstract     | Full text (PDF 417 KBs) | BibTex
  • J. M. Marçal, F. Nunes, F. Sousa, Performance of an adaptive partitioned vector tracking algorithm with real scintillation data, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, December, 2018,
    | Abstract     | Full text (PDF 696 KBs) | BibTex
  • F. Nunes, F. Sousa, J. M. Marçal, Analytic Phase-screen Model for Fast Simulation of Ionospheric Scintillation in GNSS Signals, International Conference on Localization and GNSS ICL-GNSS, Guimarães, Portugal, Vol., pp. 1 - 6, June, 2018,
    | Abstract     | BibTex
  • J. M. Marçal, F. Nunes, F. Sousa, Comparison of low complexity C/No estimators for GNSS signals affected by ionospheric scintillation, International Technical Symposioum on Navigation and Timing ITSNT, Toulouse, France, November, 2017 | Full text (PDF 348 KBs) | BibTex
  • J. M. Marçal, F. Nunes, F. Sousa, Robust vector tracking for carrier phase signals with separated estimation of common and individual errors, Institute of Navigation International Technical Meeting ITM, Monterey, CA, United States, Vol. -, pp. - - -, January, 2017,
    | Abstract     | Full text (PDF 559 KBs) | BibTex
  • J. M. Marçal, F. Nunes, F. Sousa, Performance of a scintillation robust vector tracking for GNSS carrier phase signals, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), -, Netherlands, Vol. -, pp. - - -, December, 2016,
    | Abstract     | BibTex
  • F. Nunes, J. Leitão, F. Sousa, Performance Analysis of an Absolute Phase Modulation Scheme for GNSS Signals, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. ., pp. . - ., December, 2016,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, Performance of a VDFLL GNSS Receiver Architecture in Presence of Interference, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2016,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, Performance Evaluation in AltBOC Receivers Affected by Interference, International Conference on Localization and GNSS ICL-GNSS, Barcelona, Spain, Vol. 1, pp. 1 - 6, June, 2016,
    | Abstract     | Full text (PDF 294 KBs) | BibTex
  • F. Sousa, F. Nunes, Sensitivity of GNSS Blind Interference Detection Algorithm Based on Fourth-order Autocumulants, International Conference on Localization and GNSS ICL-GNSS, Barcelona, Spain, Vol. 1, pp. 1 - 6, June, 2016,
    | Abstract     | Full text (PDF 218 KBs) | BibTex
  • F. Sousa, F. Nunes, Performance Comparison of a VDFLL versus VDLL and Scalar GNSS Receiver Architectures in Harsh Scenarios, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2014,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, Generation of Nakagami Correlated Fading in GNSS Signals Affected by Ionospheric Scintillation, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2014 | BibTex
  • F. Nunes, F. Sousa, Interference Detection in GNSS Signals Using the Gaussianity Criterion, European Signal Processing Conference EUSIPCO, Lisbon, Portugal, Vol. I, pp. 1 - 5, September, 2014,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, Practical Simulation of GNSS Signals in the Presence of Ionospheric Scintillation, IEEE Position, Location and Navigation Symp. - PLANS, Monterey-San Francisco, United States, Vol. I, pp. 50 - 58, May, 2014,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, Performance Analysis of a VDFLL GNSS Receiver Architecture under Ionospheric Scintillation and Multipath Conditions, IEEE Position, Location and Navigation Symp. - PLANS, Monterey-San Francisco, United States, Vol. I, pp. 602 - 611, May, 2014,
    | Abstract     | BibTex
  • F. Nunes, J. Leitão, F. Sousa, Absolute Modulation Scheme for Enhanced GNSS Receiver Performance, European Workshop on GNSS Signals and Signal Processing - EWGSSP, Munich, Germany, Vol. I, pp. 1 - 7, December, 2013,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, Interference Detection in GNSS Signals through the Sample Covariance Matrix, European Workshop on GNSS Signals and Signal Processing - EWGSSP, Munich, Germany, Vol. I, pp. 1 - 8, December, 2013,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, Jamming Detection in GNSS Signals Using the Sample Covariance Matrix, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2012,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, Characterization and Performance Analysis of a VDFLL GNSS Receiver Architecture, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2012,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, New Expressions for the Autocorrelation Function of Galileo Signals, European Navigation Conf. - ENC-GNSS, London, United Kingdom, Vol. I, pp. 1 - 15, November, 2011,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Performance Analysis of Low-Complexity VDLL Architectures for GNSS Signals, European Navigation Conf. - ENC-GNSS, London, United Kingdom, Vol. 1, pp. 1 - 13, November, 2011,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, J. M. Marçal, Low-Complexity VDLL Receiver for Multi-GNSS Constellations, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2010,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, Near-Far effect mitigation for GNSS software receivers using subspace projection, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 6, December, 2010,
    | Abstract     | BibTex
  • J. Lorga, P. F. Silva, J. Silva, T. Silva, M. Nunes, F. Nunes, F. Sousa, GNSS Hybridization for Indoor Positioning, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 13, December, 2010,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, N. Delgado, A VDLL Approach to GNSS Cell Positioning for Indoor Scenarios, Institute of Navigation GPS/GNSS Conf., Savannah, United States, Vol. 1, pp. 1690 - 1699, September, 2009,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, J. Leitão, Correlation Losses and Interference Rejection due to Quantization in CBOC Receivers, Institute of Navigation GPS/GNSS Conf., Savannah, United States, Vol. 1, pp. 3234 - 3241, September, 2009,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Performance Analysis of Altimeter-Aided GNSS Receiver for Indoor Scenarios, Conf. on Telecommunications - ConfTele, Santa maria da Feira, Portugal, Vol. 1, pp. 1 - 4, May, 2009,
    | Abstract     | Full text (PDF 259 KBs) | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Code Tracking Algorithm for GNSS Open-Loop Receivers Using Autocorrelation Interpolation, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2008,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, J. Leitão, Multipath Mitigation Techniques in MBOC GPS/Galileo Signals Using the CCRW Concept, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2008,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, J. Leitão, BOC/MBOC Multicorrelator Receiver with Least-Squares Multipath Mitigation Technique, Institute of Navigation GPS/GNSS Conf., Savannah, United States, Vol. 1, pp. 1 - 11, September, 2008,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Least-Squares Minimization Technique for Multipath Mitigation in GNSS Receivers, European Navigation Conf. - ENC-GNSS, Toulouse, France, Vol. 1, pp. 1 - 11, April, 2008,
    | Abstract     | BibTex
  • F. Sousa, F. Nunes, J. Leitão, Code Correlation Reference Waveforms for Multipath Mitigation in MBOC GNSS Receivers, European Navigation Conf. - ENC-GNSS, Toulouse, France, Vol. 1, pp. 1 - 10, April, 2008,
    | Abstract     | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Nonlinear Least-Squares Algorithm for Close-in Multipath Mitigation in GNSS Receivers, Institute of Navigation GPS/GNSS Conf., Fort Worth, United States, Vol. I, pp. 1 - 9, September, 2007 | BibTex
  • F. Nunes, J. Leitão, F. Sousa, Improving Pseudorange Estimation in GNSS Receivers with a Recursive Bayesian Approach, Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 1 - 4, May, 2007 | BibTex
  • F. Sousa, F. Nunes, J. Leitão, Asymmetrical Strobe Pulses for Multipath Mitigation in BOC GNSS Receivers, Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 1 - 4, May, 2007 | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Parallel Bayesian Code Delay and Doppler frequency Estimation in GNSS Receivers, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2006 | BibTex
  • F. Sousa, F. Nunes, J. Leitão, Strobe Correlator Design for Multipath Mitigation in BOC GNSS Receivers, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2006 | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Kalman Filtering for Acquisition of GNSS Signals in Highly-Manoeuvrable Receivers, IEEE Position, Location and Navigation Symp. - PLANS, San Diego, United States, Vol. 1, pp. 1 - 9, April, 2006 | BibTex
  • F. Sousa, F. Nunes, J. Leitão, Strobe Pulse Design for Multipath Mitigation in BOC GNSS Receivers, IEEE Position, Location and Navigation Symp. - PLANS, San Diego, United States, Vol. 1, pp. 1 - 8, April, 2006 | BibTex
  • F. Sousa, F. Nunes, J. Leitão, Partial Correlation Technique for the Acquisition of Weak GPS/Galileo Signals, Institute of Navigation Annual Meeting, Cambridge-Boston, United States, Vol. 1, pp. 543 - 552, June, 2005 | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Improving Multipath Mitigation in GPS/Galileo BOC Signals with Gating Functions, Institute of Navigation Annual Meeting, Cambridge-Boston, United States, Vol. 1, pp. 498 - 507, June, 2005 | BibTex
  • F. Nunes, F. Sousa, J. Silva, J. Leitão, Hybrid Code Delay Estimator for GPS/Galileo BOC Signals Using the Innovations Approach, Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. 1, pp. 1 - 4, April, 2005 | BibTex
  • A. Nunes, T. Ferreira, J. Borràs, F. Nunes, F. Sousa, G. Seco, Signal Generator and Receiver Toolbox for Galileo/GPS Signals, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2004 | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Multipath Mitigation Technique for BOC Signals Using Gating Functions, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2004 | BibTex
  • F. Sousa, F. Nunes, J. Leitão, An Acquisition Algorithm for Weak Signals in Galileo and Modernized GPS Systems, ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 480 - 487, December, 2004 | BibTex
  • F. Nunes, F. Sousa, J. Leitão, Innovations-based Code Discriminator for GPS/Galileo BOC Signals, IEEE Vehicular Networking Conf. (VNC), Los Angeles, United States, Vol. 1, pp. 1 - 5, September, 2004 | BibTex
  • F. Nunes, F. Sousa, J. Leitão, An Innovations Approach to False-lock Mitigation for GPS/Galileo BOC Signals, Institute of Navigation GPS/GNSS Conf., Long Beach, CA, United States, Vol. 1, pp. 1 - 8, September, 2004 | BibTex
  • F. Sousa, Fast Acquisition and Tracking in GNSS Receivers: An Innovations Based Approach, ESA DSP, Catnia, Italy, Vol. 1, pp. 412 - 419, September, 2003 | BibTex
  • F. Sousa, J. Leitão, Adaptive Carrier Tracking in Mobile Communication – An Innovations-Based Approach, IEEE Vehicular Networking Conf. (VNC), Vancouver, Canada, Vol. 4, pp. 2273 - 2277, September, 2002 | BibTex
  • F. Sousa, J. Leitão, Sincronização baseada no modelo da dinâmica emissor-receptor em comunicação móvel, Jornadas de Engenharia de Electrónica e Telecomunicações e de Computadores do ISEL, Lisboa, Portugal, Vol. 1, pp. 1 - 8, May, 2002 | BibTex
  • F. Sousa, J. Leitão, Carrier Tracking and Symbol Timing in Highly Accelerative Mobile Communications, ESA DSP, Lisboa, Portugal, Vol. 1, pp. 1 - 8, October, 2001 | BibTex
  • J. Leitão, F. Sousa, Recursive Bayesian Phase Estimation in Ranging and Mobile Communication, IEEE Workshop on Statistical Signal Processing - SSP, Singapore, Singapore, Vol. 1, pp. 202 - 205, August, 2001 | BibTex
  • F. Sousa, J. Leitão, Mobile Communications based on an Emitter/Receiver Dynamics Model, IEEE Vehicular Networking Conf. (VNC), Rhodes, Greece, Vol. 1, pp. 2998 - 3002, May, 2001 | BibTex
  • P. M. Marques, F. Sousa, J. Leitão, A DSP Based Long Distance Echo Canceller using Short Length Centered Adaptive Filters, IEEE International Conf. on Acoustics, Speech, and Signal Processing - ICASSP, Munich, Germany, Vol. ., pp. . - ., May, 1997 | BibTex

Closed Projects5

Acronym Name Funding Agency Start date Ending date
ARNAGGS Advanced Receivers and Navigation Algorithms for GPS/Galileo Signals FCT/PTDC 01-09-2007 01-03-2011
DNURS Development of a Navigation User Receiver Simulator ESA-ESTEC 03-01-2003 31-12-2003
ESTIP (III) ESTudo, desenvolvimento e experimentação de soluções inovadoras em redes IP (III) PT Inovação 01-01-2006 30-06-2006
INPOS Indoors Positioning Using GNSS Aided Techniques QREN 01-06-2008 01-06-2010
ROCAT Techniques for Robust Carrier Phase Tracking (under High Dynamics/Strong Fading/Scintillation Conditions) ESA-ESTEC 01-07-2012 01-06-2013
2Miscellaneous
  • F. Sousa, Entidade de Certificação Electrónica do Estado (ECEE), Member of Technical Committee, 03-12-2005
  • F. Sousa, Jornadas de Engenharia de Telecomunicações e Computadores, Member of Technical Committee, 04-05-2005

Activities from this researcher fall under the following United Nations Strategic Development Goals (SDGs):

© 2025, IT - Instituto de Telecomunicações | All Rights Reserved