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Instituto de Telecomunicações
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Short CV

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Wireless Communications
Jose Manuel Nunes Leitão Academic position: Full Professor
Joining date: 01-01-1993
Role in IT: Senior Researcher
Scientific Area: Wireless Communications
Group: Communication Theory – Lx
 
Degrees 

- Agregação, Instituto Superior Técnico, 15-06-1993
 
Affiliations 

- Instituto Superior Técnico, Full Professor, 01-05-1976
 
Involvement in Projects 

- Currently running projects

Acronym Name Funding Agency Start date Ending date
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


   
Academic Activities 

Supervision of theses

PhD

- Open loop structures in digital receivers:Software Radio Approach, PhD, Fernando Sousa, 12-2008

- Ambiguity Resolution in GPS Positioning, PhD, José Eduardo C. Sanguino, 6-2004

- Importance Sampling Evaluation of Digital Phase Detectors with Carrier Phase Tracking, PhD, Alberto Sena da Silva , 7-2003

 
Publications 

    Book Chapters  [6] 

- Figueiredo, M. A. T.; Leitão, J.; 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.

- Fred, A. L. N.; Leitão, J.; "A Comparative Study of String Dissimilarity Measures in Structural Clustering" - Chapter in International Conference on Advances in Pattern Recognition, Sameer Singh , Springer, , 1998.

- Fred, A. L. N.; Leitão, J.; "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.

- Figueiredo, M. A. T.; Leitão, J.; 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.

- Figueiredo, M. A. T.; Leitão, J.; "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.

- Figueiredo, M. A. T.; Leitão, J.; "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.

    Papers in Journals  [18] 

- Nunes, F.; Leitão, J.; Sousa, F.; "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

- Sena da Silva, F. S. ; Leitão, J.; "Importance Sampling Evaluation of Digital Phase Detectors with Carrier Phase Tracking. A Large Deviations Approach.", IEEE Trans. on Signal Processing, Vol. 56, No. 12, pp. 5976 - 5986, December, 2008.
Abstract | BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Gating Functions for Multipath Mitigation in GNSS BOC Signals", IEEE Trans. on Aerospace and Electronic Systems, Vol. 43, No. 3, pp. 951 - 964, July, 2007.
Abstract | BibTex

- Fred, A. L. N.; Leitão, J.; "A New Cluster Isolation Criterion Based on Dissimilarity Increments", IEEE Trans. on Pattern Analysis and Machine Intelligence, Vol. 25, No. 8, pp. 944 - 958, August, 2003.
Full text (PDF 6813KB) | BibTex

- Dias, J.; Leitão, J.; E. Fonseca; "Reconstruction of Backscattering and extinction coefficients in Lidar: a stochastic filtering approach", IEEE Trans. on Geoscience and Remote Sensing, Vol. 42, No. 2, pp. 604 - 624, February, 2003.
Abstract | BibTex

- Dias, J.; Leitão, J.; "Efficient computation of tr{AB-1} for Toeplitz matrices", IEEE Signal Processing Letters, Vol. 9, No. 2, pp. 44 - 46, May, 2002.
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- Dias, J.; Leitão, J.; "The ZpiM Algorithm for Interferometric Image Reconstruction in SAR/SAS", IEEE Trans. on Image Processing, Vol. 11, No. 4, pp. 408 - 422, April, 2002.
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- Figueiredo, M. A. T.; Leitão, J.; A. K. Jain; "Unsupervised contour representation and estimation using B-splines and a minimum description length criterion", IEEE Trans. on Image Processing, Vol. 9, No. 6, pp. 1075 - 187, June, 2000.
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- Dias, J.; Leitão, J.; "Nonparametric Estimation of Mean Doppler and Spectral Width", IEEE Trans. on Geoscience and Remote Sensing, Vol. 38, No. 1, pp. 271 - 282, January, 2000.
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- Nunes, F.; Leitão, J.; "Signal Processing Aspects of Fusion Plasma Broadband Reflectometry", IEEE Trans. on Signal Processing, Vol. 47, No. 2, pp. 378 - 388, February, 1999.
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- Nunes, F.; Leitão, J.; "A Nonlinear Filtering Approach to Estimation and Detection in Mobile Communications", IEEE Journal on Selected Areas in Communications, Vol. 16, No. 9, pp. 1649 - 1659, December, 1998.
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- Figueiredo, M. A. T.; Leitão, J.; "Absolute phase image reconstruction: a stochastic nonlinear filtering approach", IEEE Trans. on Image Processing, Vol. 7, No. 7, pp. 868 - 882, July, 1998.
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- Figueiredo, M. A. T.; Leitão, J.; "Unsupervised image restoration and edge location using compound Gauss-Markov random fields and the MDL principle", IEEE Trans. on Image Processing, Vol. 6, No. 8, pp. 1089 - 1102, August, 1997.
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- Dias, J.; Leitão, J.; "Wall position and thickness estimation from sequences of echocardiograms images", IEEE Trans. on Medical Imaging, Vol. 15, No. 1, pp. 25 - 38, February, 1996.
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- Dias, J.; Leitão, J.; "Asymptotically efficient estimation of spectral moments", IEEE Trans. on Signal Processing, Vol. 43, No. 9, pp. 2222 - 2225, September, 1995.
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- Figueiredo, M. A. T.; Leitão, J.; "A nonsmoothing approach to the estimation of vessel contours in angiograms", IEEE Trans. on Medical Imaging, Vol. 14, No. , pp. 162 - 172, March, 1995.
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- Figueiredo, M. A. T.; Leitão, J.; "Sequential and parallel image restoration: Neural network implementations", IEEE Trans. on Image Processing, Vol. 3, No. , pp. 789 - 802, November, 1994.
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- Figueiredo, M. A. T.; Leitão, J.; "Bayesian estimation of ventricular contours in angiographic images", IEEE Trans. on Medical Imaging, Vol. 11, No. 3, pp. 416 - 429, March, 1992.
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    Papers in Conference Proceedings  [59] 

- Nunes, F.; Leitão, J.; Sousa, F.; "Absolute Modulation Scheme for Enhanced GNSS Receiver Performance", Proc European Workshop on GNSS Signals and Signal Processing - EWGSSP, Munich, Germany, Vol. I, pp. 1 - 7, December, 2013.
Abstract | BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Performance Analysis of Low-Complexity VDLL Architectures for GNSS Signals", Proc European Navigation Conf. - ENC-GNSS, London, United Kingdom, Vol. 1, pp. 1 - 13, November, 2011.
Abstract | BibTex

- M.-J. Rendas; Leitão, J.; "Rumor-Robust Distributed Data Fusion", Proc 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

- Sousa, F.; Nunes, F.; Leitão, J.; "Correlation Losses and Interference Rejection due to Quantization in CBOC Receivers", Proc Institute of Navigation GPS/GNSS Conf., Savannah, United States, Vol. 1, pp. 3234 - 3241, September, 2009.
Abstract | BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Performance Analysis of Altimeter-Aided GNSS Receiver for Indoor Scenarios", Proc Conf. on Telecommunications - ConfTele, Santa maria da Feira, Portugal, Vol. 1, pp. 1 - 4, May, 2009.
Abstract | Full text (PDF 259KB) | BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Code Tracking Algorithm for GNSS Open-Loop Receivers Using Autocorrelation Interpolation", Proc ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2008.
Abstract | BibTex

- Sousa, F.; Nunes, F.; Leitão, J.; "Multipath Mitigation Techniques in MBOC GPS/Galileo Signals Using the CCRW Concept", Proc ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2008.
Abstract | BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "BOC/MBOC Multicorrelator Receiver with Least-Squares Multipath Mitigation Technique ", Proc Institute of Navigation GPS/GNSS Conf., Savannah, United States, Vol. 1, pp. 1 - 11, September, 2008.
Abstract | BibTex

- Sousa, F.; Nunes, F.; Leitão, J.; "Code Correlation Reference Waveforms for Multipath Mitigation in MBOC GNSS Receivers", Proc European Navigation Conf. - ENC-GNSS, Toulouse, France, Vol. 1, pp. 1 - 10, April, 2008.
Abstract | BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Least-Squares Minimization Technique for Multipath Mitigation in GNSS Receivers", Proc European Navigation Conf. - ENC-GNSS, Toulouse, France, Vol. 1, pp. 1 - 11, April, 2008.
Abstract | BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Nonlinear Least-Squares Algorithm for Close-in Multipath Mitigation in GNSS Receivers", Proc Institute of Navigation GPS/GNSS Conf., Fort Worth, United States, Vol. I, pp. 1 - 9, September, 2007.
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- Sousa, F.; Nunes, F.; Leitão, J.; "Asymmetrical Strobe Pulses for Multipath Mitigation in BOC GNSS Receivers", Proc Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 1 - 4, May, 2007.
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- Nunes, F.; Leitão, J.; Sousa, F.; "Improving Pseudorange Estimation in GNSS Receivers with a Recursive Bayesian Approach", Proc Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 1 - 4, May, 2007.
| BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Parallel Bayesian Code Delay and Doppler frequency Estimation in GNSS Receivers", Proc ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2006.
| BibTex

- Sousa, F.; Nunes, F.; Leitão, J.; "Strobe Correlator Design for Multipath Mitigation in BOC GNSS Receivers", Proc ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2006.
| BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Kalman Filtering for Acquisition of GNSS Signals in Highly-Manoeuvrable Receivers", Proc IEEE Position, Location and Navigation Symp. - PLANS, San Diego, United States, Vol. 1, pp. 1 - 9, April, 2006.
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- Sousa, F.; Nunes, F.; Leitão, J.; "Strobe Pulse Design for Multipath Mitigation in BOC GNSS Receivers", Proc IEEE Position, Location and Navigation Symp. - PLANS, San Diego, United States, Vol. 1, pp. 1 - 8, April, 2006.
| BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Improving Multipath Mitigation in GPS/Galileo BOC Signals with Gating Functions", Proc Institute of Navigation Annual Meeting, Cambridge-Boston, United States, Vol. 1, pp. 498 - 507, June, 2005.
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- Sousa, F.; Nunes, F.; Leitão, J.; "Partial Correlation Technique for the Acquisition of Weak GPS/Galileo Signals ", Proc Institute of Navigation Annual Meeting, Cambridge-Boston, United States, Vol. 1, pp. 543 - 552, June, 2005.
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- Nunes, F.; Sousa, F.; J. Silva; Leitão, J.; "Hybrid Code Delay Estimator for GPS/Galileo BOC Signals Using the Innovations Approach", Proc Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. 1, pp. 1 - 4, April, 2005.
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- Sousa, F.; Nunes, F.; Leitão, J.; "An Acquisition Algorithm for Weak Signals in Galileo and Modernized GPS Systems", Proc ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 480 - 487, December, 2004.
| BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "Multipath Mitigation Technique for BOC Signals Using Gating Functions", Proc ESA Workshop on Satellite Navigation User Equipment Technologies (NAVITEC), Noordwijk, Netherlands, Vol. 1, pp. 1 - 8, December, 2004.
| BibTex

- Nunes, F.; Sousa, F.; Leitão, J.; "An Innovations Approach to False-lock Mitigation for GPS/Galileo BOC Signals", Proc Institute of Navigation GPS/GNSS Conf., Long Beach, CA, United States, Vol. 1, pp. 1 - 8, September, 2004.
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- Nunes, F.; Sousa, F.; Leitão, J.; "Innovations-based Code Discriminator for GPS/Galileo BOC Signals", Proc IEEE Vehicular Networking Conf. (VNC), Los Angeles, United States, Vol. 1, pp. 1 - 5, September, 2004.
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- Nunes, F.; Leitão, J.; "Innovations-based Channel Estimation and symbol Detection of Multi-level OFDM Signals", Proc IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Comm., Lisboa, Portugal, Vol. 1, pp. 1 - 4, July, 2004.
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- Nunes, F.; Leitão, J.; "A New Fast Code/Frequency Acquisition Algorithm for GPS C/A Signals", Proc IEEE Vehicular Networking Conf. (VNC), Orlando, United States, Vol. 1, pp. 1 - 5, October, 2003.
| BibTex

- Nunes, F.; Leitão, J.; "State-space Estimation of Rapidly-varying Carrier Frequency Offsets in OFDM Systems", Proc IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Comm., Roma, Italy, Vol. 1, pp. 370 - 374, June, 2003.
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- Nunes, F.; Leitão, J.; "Joint Doppler Frequency and Frequency-Rate Estimation in LEO Satellite Communications", Proc IEEE Global Telecommunications Conf. - GLOBECOM, Taipei, Taiwan, Vol. 1, pp. 1 - 5, November, 2002.
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- Nunes, F.; Leitão, J.; "16-DAPSK Innovations-based Sequence Detection for Satellite Communications with Imperfect Carrier Synchronization", Proc IEEE Vehicular Networking Conf. (VNC), Vancouver, Canada, Vol. 1, pp. 1 - 5, September, 2002.
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- Nunes, F.; Leitão, J.; "16-DAPSK Sequence Detection in Fading Channels with Carrier Frequency Offset Estimation", Proc IEEE International Symp. on Personal, Indoor and Mobile Radio Commun - PIMRC , Lisbon, Portugal, Vol. 5, pp. 2072 - 2076, September, 2002.
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- Leitão, J.; "Adaptive carrier tracking in mobile communication. An innovations based approach", Proc IEEE Vehicular Networking Conf. (VNC), Vancouver, Canada, Vol. , pp. 00 - 03, September, 2002.
| BibTex

- Sousa, F.; Leitão, J.; "Adaptive Carrier Tracking in Mobile Communication – An Innovations-Based Approach", Proc IEEE Vehicular Networking Conf. (VNC), Vancouver, Canada, Vol. 4, pp. 2273 - 2277, September, 2002.
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- Sousa, F.; Leitão, J.; "Sincronização baseada no modelo da dinâmica emissor-receptor em comunicação móvel", Proc Jornadas de Engenharia de Electrónica e Telecomunicações e de Computadores do ISEL, Lisboa, Portugal, Vol. 1, pp. 1 - 8, May, 2002.
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- Dias, J.; Leitão, J.; "A Discrete/Continuous Minimization Method In Interferometric Image Processing", Proc Energy Minimization Methods in Computer Vision and Pattern Recognition, Sophia Antipolis, France, Vol. , pp. 375 - 390, November, 2001.
| BibTex

- Sousa, F.; Leitão, J.; "Carrier Tracking and Symbol Timing in Highly Accelerative Mobile Communications", Proc ESA DSP, Lisboa, Portugal, Vol. 1, pp. 1 - 8, October, 2001.
| BibTex

- Nunes, F.; Leitão, J.; "Doppler Frequency and Frequency-Rate Estimation in Fading Channels. Application to LEO Satellite Communications", Proc ESA DSP, Sesimbra, Portugal, Vol. 1, pp. 8.4(1) - 8.4(8), October, 2001.
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- Dias, J.; Leitão, J.; "InSAR Phase Unwrapping: A Bayesian Approach", Proc IEEE International Geoscience and Remote Sensing Symp.- IGARSS, Sydney, Australia, Vol. I, pp. 396 - 400, September, 2001.
| BibTex

- Sena da Silva, F. S. ; Leitão, J.; "Importance Sampling Analysis of Digital Phase Detectors with Carrier Phase Tracking", Proc IEEE Workshop on Statistical Signal Processing - SSP, Singapore, Singapore, Vol. I, pp. 50 - 53, August, 2001.
| BibTex

- Leitão, J.; Sousa, F.; "Recursive Bayesian Phase Estimation in Ranging and Mobile Communication", Proc IEEE Workshop on Statistical Signal Processing - SSP, Singapore, Singapore, Vol. 1, pp. 202 - 205, August, 2001.
| BibTex

- Sena da Silva, F. S. ; Leitão, J.; "Error Floor Assessment of Digital Phase Detectors with Carrier Phase Tracking. A Large Deviations Approach", Proc IEEE International Symp. on Information Theory - ISIT, Washington DC, United States, Vol. I, pp. 137 - 137, June, 2001.
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- Nunes, F.; Leitão, J.; "M-DPSK Detection, Channel Estimation and Power Control in LEO Satellite Communications", Proc IEEE International Conf. on Communications - ICC, Helsinki, Finland, Vol. 4, pp. 2655 - 2659, June, 2001.
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- Nunes, F.; Leitão, J.; "Adaptive Scheme for M-DPSK Signals in LEO Satellite Communications", Proc IEEE Vehicular Networking Conf. (VNC), Rhodes, Greece, Vol. 4, pp. 2993 - 2997, May, 2001.
| BibTex

- Sena da Silva, F. S. ; Leitão, J.; "Importance Sampling Evaluation of Digital Phase Detectors Based on Extended Kalman-Bucy Filters", Proc IEEE International Conf. on Acoustics, Speech, and Signal Processing - ICASSP, Salt Lake City, United States, Vol. IV, pp. 2537 - 2540, May, 2001.
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- Sousa, F.; Leitão, J.; "Mobile Communications based on an Emitter/Receiver Dynamics Model", Proc IEEE Vehicular Networking Conf. (VNC), Rhodes, Greece, Vol. 1, pp. 2998 - 3002, May, 2001.
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- Nunes, F.; Leitão, J.; "Adaptive M-DPSK Scheme for Fading Channels", Proc Conf. on Telecommunications - ConfTele, Figueira da Foz, Portugal, Vol. 1, pp. 341 - 345, April, 2001.
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- Nunes, F.; Leitão, J.; "M-DPSK Receiver for Doppler-Shift Mobile Communications", Proc IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Comm., Taoyuan, Taiwan, Vol. 1, pp. 22 - 25, March, 2001.
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- Sanguino, J.; S. M. Marques; L. P. Pontes; Leitão, J.; "Operational Aspects of a DGPS-based Vessel Traffic System", Proc ESA DASIA, Montreal, Canada, Vol. --, pp. 637 - 641, May, 2000.
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- Nunes, F.; Leitão, J.; "Improving UAV-Ground Digital Links with GPS Data", Proc UAV's International Conf., Bristol, United Kingdom, Vol. 1, pp. 15.1 - 15.7, April, 2000.
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- Nunes, F.; Leitão, J.; "Nonlinear Channel Estimation in Fading OFDM Systems", Proc IEEE Global Telecommunications Conf. - GLOBECOM, Rio de Janeiro, Brazil, Vol. 4, pp. 2157 - 2161, December, 1999.
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- Nunes, F.; Leitão, J.; "Fast Phase Acquisition Receiver for LEO Communications in Rician Channels ", Proc IEEE International Conf. on Communications - ICC, Vancouver, Canada, Vol. 2, pp. 1058 - 1062, June, 1999.
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- Sanguino, J.; S. M. Marques; L. P. Pontes; Leitão, J.; "Architecture of a GPS-based Transponder. Application to a Vessel Traffic System", Proc ESA DASIA, Lisbon, Portugal, Vol. --, pp. 503 - 509, May, 1999.
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- Nunes, F.; Leitão, J.; "A Fast Phase Acquisition Receiver for Nongeostationary Orbit Satellites", Proc Conf. on Telecommunications - ConfTele, Sesimbra, Portugal, Vol. 1, pp. 50 - 54, April, 1999.
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- Nunes, F.; Leitão, J.; "Open-loop Receiver for MSK with Doppler Frequency Shift", Proc IEEE Global Telecommunications Conf. - GLOBECOM, Sydney, Australia, Vol. 6, pp. 3626 - 3631, December, 1998.
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- Sena da Silva, F. S. ; Leitão, J.; "Contour Processing for Left Ventricle Function Automatic Classification", Proc Portuguese Conf. on Pattern Recognition - RecPad, Lisboa, Portugal, Vol. I, pp. 199 - 204, March, 1998.
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- Nunes, F.; Leitão, J.; "Doppler Shift Robust Receiver for Digital Parallel Signalling in Fading Channels", Proc IEEE Global Telecommunications Conf. - GLOBECOM, Phoenix, United States, Vol. 3, pp. 1225 - 1229, November, 1997.
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- Marques, P.; Sousa, F.; Leitão, J.; "A DSP Based Long Distance Echo Canceller using Short Length Centered Adaptive Filters", Proc IEEE International Conf. on Acoustics, Speech, and Signal Processing - ICASSP, Munich, Germany, Vol. ., pp. . - ., May, 1997.
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- Nunes, F.; Leitão, J.; "Doppler Shift Robust Receiver for Mobile Satellite Communications", Proc IEEE Global Telecommunications Conf. - GLOBECOM, London, United Kingdom, Vol. 1, pp. 405 - 409, November, 1996.
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- Nunes, F.; Leitão, J.; "A Nonlinear Filtering Approach to Symbol Detection and State Estimation in Rice/Rayleigh Channels", Proc IEEE International Conf. on Communications - ICC, Seattle, United States, Vol. 3, pp. 1795 - 1799, June, 1995.
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- Nunes, F.; Leitão, J.; "State Estimation in Rice/Rayleigh Channels Using a Nonlinear Filtering Technique", Proc IEEE International Conf. on Communications - ICC, New Orleans, United States, Vol. 2, pp. 903 - 907, May, 1994.
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   - Project Reports [1] 

- Nunes, F.; Sousa, F.; Leitão, J.; J. Silva; "Development of a Navigation User Receiver Simulator", IT/Skysoft/ESA, p237, February, 2004.

 


 
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