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Creating and sharing knowledge in communications and information technology
... José Manuel Nunes Leitão

Senior Researcher

José Leitão

Academic position: Full Professor
Joining date: 01-01-1999
Roles in IT: Senior Researcher
Thematic Line: Basic Sciences and Enabling Technologies
Group: Physics of Information and Quantum Technologies - Lx
IT – Lisboa
Instituto Superior Técnico - Torre Norte - Piso 10
Av. Rovisco Pais, 1
1049 - 001 Lisboa
Tel: +351 21 841 84 54
Email: Send Email
ORCID iD
Collaboration Network

Scientific Achievements

  • Agregação, Instituto Superior Técnico, 15-06-1993
  • PhD, Instituto Superior Técnico, 01-02-1983
  • Instituto Superior Técnico, 01-05-1976,
6Books Chapters
  • M. A. T. Figueiredo, J. Leitão, A. K. Jain, On Fitting Mixture Models, Chapter in, Energy Minimization Methods in Computer Vision and Pattern Recognition, E. Hancock and M. Pellilo, Springer, Berlin, 1999
  • A. L. N. Fred, J. Leitão, A Comparative Study of String Dissimilarity Measures in Structural Clustering, Chapter in, International Conference on Advances in Pattern Recognition, Sameer Singh, Springer, 1998
  • A. L. N. Fred, J. Leitão, Minimal Sample Size for Grammatical Inference - a Bootstraping Approach, Chapter in, 2nd International Workshop on Statistical Techniques in Pattern Recognition, A. Amin, D. Dori, P. Pudil and H. Freeman, Springer, 1998
  • M. A. T. Figueiredo, J. Leitão, A. K. Jain, Adaptive parametrically deformable contours, Chapter in, Energy Minimization Methods in Computer Vision and Pattern Recognition, M. Pellilo and E. Hancock, Springer, Berlin, 1997
  • M. A. T. Figueiredo, J. Leitão, Image restoration using a standard Hopfield neural network, Chapter in, Image Processing: Theory and Applications, G. Vernazza, A. Venetsanopoulos, and C. Branccini, Elsevier Science, Amsterdam, 1993
  • M. A. T. Figueiredo, J. Leitão, Signal estimation using a standard Hopfield neural network', Chapter in, Acoustic Signal Processing for Ocean Exploration, J. Moura and I. Lourtie, Kluwer Academic, Dordrecht, 1992
19Papers in Journals
60Papers in Conferences
  • 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. 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. 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
  • M.-J. Rendas, J. Leitão, Rumor-Robust Distributed Data Fusion, IEEE International Conf. on Multisensor Fusion and Integration for Intelligent Systems - MFI2010, Salt Lake City, United States, Vol. I, pp. 230 - 235, September, 2010,
    | 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
  • 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. Nunes, J. Leitão, Innovations-based Channel Estimation and symbol Detection of Multi-level OFDM Signals, IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Comm., Lisboa, Portugal, Vol. 1, pp. 1 - 4, July, 2004 | BibTex
  • F. Nunes, J. Leitão, A New Fast Code/Frequency Acquisition Algorithm for GPS C/A Signals, IEEE Vehicular Networking Conf. (VNC), Orlando, United States, Vol. 1, pp. 1 - 5, October, 2003 | BibTex
  • F. Nunes, J. Leitão, State-space Estimation of Rapidly-varying Carrier Frequency Offsets in OFDM Systems, IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Comm., Roma, Italy, Vol. 1, pp. 370 - 374, June, 2003 | BibTex
  • F. Nunes, J. Leitão, Joint Doppler Frequency and Frequency-Rate Estimation in LEO Satellite Communications, IEEE Global Communications Conference - GLOBECOM, Taipei, Taiwan, Vol. 1, pp. 1 - 5, November, 2002 | BibTex
  • F. Nunes, J. Leitão, 16-DAPSK Sequence Detection in Fading Channels with Carrier Frequency Offset Estimation, IEEE International Symp. on Personal, Indoor and Mobile Radio Commun - PIMRC, Lisbon, Portugal, Vol. 5, pp. 2072 - 2076, September, 2002 | BibTex
  • F. Nunes, J. Leitão, 16-DAPSK Innovations-based Sequence Detection for Satellite Communications with Imperfect Carrier Synchronization, IEEE Vehicular Networking Conf. (VNC), Vancouver, Canada, Vol. 1, pp. 1 - 5, September, 2002 | BibTex
  • J. Leitão, Adaptive carrier tracking in mobile communication. An innovations based approach, IEEE Vehicular Networking Conf. (VNC), Vancouver, Canada, Vol., pp. 00 - 03, September, 2002 | 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
  • J. Bioucas-Dias, J. Leitão, A Discrete/Continuous Minimization Method In Interferometric Image Processing, Energy Minimization Methods in Computer Vision and Pattern Recognition, Sophia Antipolis, France, Vol., pp. 375 - 390, November, 2001 | BibTex
  • F. Nunes, J. Leitão, Doppler Frequency and Frequency-Rate Estimation in Fading Channels. Application to LEO Satellite Communications, ESA DSP, Sesimbra, Portugal, Vol. 1, pp. 8.4(1) - 8.4(8), October, 2001 | 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. Bioucas-Dias, J. Leitão, InSAR Phase Unwrapping: A Bayesian Approach, IEEE International Geoscience and Remote Sensing Symp.- IGARSS, Sydney, Australia, Vol. I, pp. 396 - 400, September, 2001 | BibTex
  • F. S. Sena da Silva, J. Leitão, Importance Sampling Analysis of Digital Phase Detectors with Carrier Phase Tracking, IEEE Workshop on Statistical Signal Processing - SSP, Singapore, Singapore, Vol. I, pp. 50 - 53, August, 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. Nunes, J. Leitão, M-DPSK Detection, Channel Estimation and Power Control in LEO Satellite Communications, IEEE International Conference on Communications - ICC, Helsinki, Finland, Vol. 4, pp. 2655 - 2659, June, 2001 | BibTex
  • F. S. Sena da Silva, J. Leitão, Error Floor Assessment of Digital Phase Detectors with Carrier Phase Tracking. A Large Deviations Approach, IEEE International Symp. on Information Theory - ISIT, Washington DC, United States, Vol. I, pp. 137 - 137, June, 2001 | BibTex
  • F. Nunes, J. Leitão, Adaptive Scheme for M-DPSK Signals in LEO Satellite Communications, IEEE Vehicular Networking Conf. (VNC), Rhodes, Greece, Vol. 4, pp. 2993 - 2997, May, 2001 | BibTex
  • F. S. Sena da Silva, J. Leitão, Importance Sampling Evaluation of Digital Phase Detectors Based on Extended Kalman-Bucy Filters, IEEE International Conf. on Acoustics, Speech, and Signal Processing - ICASSP, Salt Lake City, United States, Vol. IV, pp. 2537 - 2540, May, 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
  • F. Nunes, J. Leitão, Adaptive M-DPSK Scheme for Fading Channels, Conf. on Telecommunications - ConfTele, Figueira da Foz, Portugal, Vol. 1, pp. 341 - 345, April, 2001 | BibTex
  • F. Nunes, J. Leitão, M-DPSK Receiver for Doppler-Shift Mobile Communications, IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Comm., Taoyuan, Taiwan, Vol. 1, pp. 22 - 25, March, 2001 | BibTex
  • J. Sanguino, S. M. Marques, L. P. Pontes, J. Leitão, Operational Aspects of a DGPS-based Vessel Traffic System, ESA DASIA, Montreal, Canada, Vol. --, pp. 637 - 641, May, 2000 | BibTex
  • F. Nunes, J. Leitão, Improving UAV-Ground Digital Links with GPS Data, UAV's International Conf., Bristol, United Kingdom, Vol. 1, pp. 15.1 - 15.7, April, 2000 | BibTex
  • F. Nunes, J. Leitão, Nonlinear Channel Estimation in Fading OFDM Systems, IEEE Global Communications Conference - GLOBECOM, Rio de Janeiro, Brazil, Vol. 4, pp. 2157 - 2161, December, 1999 | BibTex
  • F. Nunes, J. Leitão, Fast Phase Acquisition Receiver for LEO Communications in Rician Channels, IEEE International Conference on Communications - ICC, Vancouver, Canada, Vol. 2, pp. 1058 - 1062, June, 1999 | BibTex
  • J. Sanguino, S. M. Marques, L. P. Pontes, J. Leitão, Architecture of a GPS-based Transponder. Application to a Vessel Traffic System, ESA DASIA, Lisbon, Portugal, Vol. --, pp. 503 - 509, May, 1999 | BibTex
  • F. Nunes, J. Leitão, A Fast Phase Acquisition Receiver for Nongeostationary Orbit Satellites, Conf. on Telecommunications - ConfTele, Sesimbra, Portugal, Vol. 1, pp. 50 - 54, April, 1999 | BibTex
  • F. Nunes, J. Leitão, Open-loop Receiver for MSK with Doppler Frequency Shift, IEEE Global Communications Conference - GLOBECOM, Sydney, Australia, Vol. 6, pp. 3626 - 3631, December, 1998 | BibTex
  • F. S. Sena da Silva, J. Leitão, Contour Processing for Left Ventricle Function Automatic Classification, Portuguese Conf. on Pattern Recognition - RecPad, Lisboa, Portugal, Vol. I, pp. 199 - 204, March, 1998 | BibTex
  • F. Nunes, J. Leitão, Doppler Shift Robust Receiver for Digital Parallel Signalling in Fading Channels, IEEE Global Communications Conference - GLOBECOM, Phoenix, United States, Vol. 3, pp. 1225 - 1229, November, 1997 | 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
  • F. Nunes, J. Leitão, Doppler Shift Robust Receiver for Mobile Satellite Communications, IEEE Global Communications Conference - GLOBECOM, London, United Kingdom, Vol. 1, pp. 405 - 409, November, 1996 | BibTex
  • F. Nunes, J. Leitão, A Nonlinear Filtering Approach to Symbol Detection and State Estimation in Rice/Rayleigh Channels, IEEE International Conference on Communications - ICC, Seattle, United States, Vol. 3, pp. 1795 - 1799, June, 1995 | BibTex
  • F. Nunes, J. Leitão, State Estimation in Rice/Rayleigh Channels Using a Nonlinear Filtering Technique, IEEE International Conference on Communications - ICC, New Orleans, United States, Vol. 2, pp. 903 - 907, May, 1994 | BibTex

Closed Projects13

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
CETMC Channel Estimation Techniques in Mobile Communications FCT/POSI 01-01-2001 31-12-2004
DNURS Development of a Navigation User Receiver Simulator ESA-ESTEC 03-01-2003 31-12-2003
DP-PMI Doctoral Programme in the Physics and Mathematics of Information: Foundations of Future Information Technologies (DP-PMI) FCT 01-01-2014 01-12-2021
ICNS Integrated Communication and Navigation Systems FCT/POSI 01-01-2001 01-01-2003
INPOS Indoors Positioning Using GNSS Aided Techniques QREN 01-06-2008 01-06-2010
ISSMIA Integration of Stochastic and Structural Models in Image and Pattern Analysis-Phase II FCT/POSI 01-06-2001 01-01-2003
P-Quantum Practical Quantum Communications IT/LA 01-09-2011 01-08-2013
QMiCS QMiCS – Quantum Microwave Communication and Sensing EU/H2020 01-10-2018 30-09-2021
QuantPrivTel QuantPrivTel: Quantum PrivateTelecommunications FCT/PTDC 01-01-2010 01-06-2013
QuantTel Quantum Secure Telecommunications IT/LA 01-11-2008 01-10-2010
QuNet QuNet - Quantum Telecommunication Networks IT 01-11-2016 01-10-2018
TheBlinQC TheBlinQC – Theory-Blind Quantum Control EU/H2020, FCT 01-02-2018 01-02-2021
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