João Xavier

João Xavier

Faculty

Position: Assistant Professor (IST)

Signal and Image Processing Group (SIPG)

tp.aobsilu.ocincet.rsi@reivaxj

Phone :+351-218418296

Office: 7.22

Journal Papers

[1] Pedro Guerreiro, João Xavier, Distributed learning with time correlated information, IEEE Signal Processing Letters, Vol. 24, no. 11, pp. 1636-1640, November, 2017
[2] Brian Swenson, S. Kar, João Xavier, D. Leslie, Robustness properties in fictitious-play-type algorithms, SIAM Journal on Control and Optimisation, Vol. 55, No. 5, pp. 3295-3318, October, 2017
[3] Brian Swenson, S. Kar, João Xavier, Single sample fictitious play, IEEE Transactions on Automatic Control, Vol. 62, No. 11, pp. 6026-6031, May, 2017
[4] Marco Stošić, João Xavier, Marija Dodig, Projection on the intersection of convex sets, Linear Algebra and Its Applications, Vol. 509, No. 8-9, pp. 191-205, July, 2016 - PDF
[5] Dragana Bajovic, Jose M. F. Moura, João Xavier, Bruno Sinopoli, Distributed Inference Over Directed Networks: Performance Limits and Optimal Design, IEEE Transactions on Signal Image Processing, Vol. 64, No. 13, July, 2016
[6] Brian Swenson, S. Kar, João Xavier, Empirical Centroid Fictitious Play: An Approach for Distributed Learning in Multi-Agent Games, IEEE Transactions on Signal Processing, Vol. 63, No. 15, August, 2015 - PDF
[7] João Xavier, Identification of switched ARX models via convex optimization and expectation maximization, Elsevier, Journal of Process Control, vol. 28, pp. 9-16, 2015 - PDF
[8] João Xavier, Marco Stošić, On minimizing a quadratic function on Stiefel manifold, Elsevier, Linear Algebra and its Applications, Volume 475, 15 June 2015, Pages 251–264, 2015 - PDF
[9] João Mota, João Xavier, Pedro Aguiar, Distributed Optimization With Local Domains: Applications in MPC and Network Flows, IEEE Transactions on Automatic Control, 2015 - PDF
[10] Augusto Santos, João Xavier, Bi-Virus SIS Epidemics over Networks: Qualitative Analysis, IEEE Transactions on Network Science and Engineering, 2015 - PDF
[11] João Xavier, Dusan Jakovetic, Linear Convergence Rate of Class of Distributed Augmented Lagrangian Algorithms, IEEE Transactions on Automatic Control, vol. 60, no. 4, pp. 922-936, 2015 - PDF
[12] Cláudia Soares, João Xavier, João Pedro Gomes, Simple and Fast Convex Relaxation Method for Cooperative Localization in Sensor Networks Using Range Measurements, IEEE Transactions on Signal Processing, Vol. 63, No. 17, pp. 4532 - 4543, September, 2015 - PDF
[13] Cláudia Soares, João Xavier, João Pedro Gomes, Simple and fast cooperative localization for sensor networks, IEEE Transactions on Wireless Communications, vol. 13, no. 7, pp. 3951-3964, July , 2014 - PDF
[14] Dusan Jakovetic, João Xavier, Convergence Rates of Distributed Nesterov-Like Gradient Methods on Random Networks, IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 62, NO. 4, FEBRUARY, 2014 - PDF
[15] Dusan Jakovetic, João Xavier, Fast Distributed Gradient Methods, IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 59, NO. 5, MAY, 2014 - PDF
[16] Pinar Oguz-Ekim, João Pedro Gomes, João Xavier, Marco Stošić, Paulo Oliveira, An Angular Approach for Range-Based Approximate Maximum Likelihood Source Localization Through Convex Relaxation, IEEE Transactions on Wireless Communications, Vol. 13, No. 7, pp. 3951-3964, July. DOI:10.1109/TWC.2014.2314653, 2014
[17] Aamir Ahmad, José Santos-Victor, João Xavier, Pedro Lima, 3D to 2D Bijection for Spherical Objects Under Equidistant Fisheye Projection, Computer Vision and Image Understanding (CVIU), Elsevier,Vol. 125, August 2014, pp. 172–183, 2014 - PDF
[18] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, D-ADMM: A Communication-Efficient Distributed Algorithm for Separable Optimization, IEEE Transactions on Signal Processing, Vol. 6, Issue 10, pp. 2718-2723, 2013
[19] Ricardo Ferreira, João Xavier, João Paulo Costeira, Victor Barroso, Newton algorithms for riemannian distance related problems on connected locally symmetric manifolds, IEEE Journal of Selected Topics in Signal Processing, Vol. 7, No. 4, pp. 634-645, August, 2013 - PDF
[20] H. Reboredo, João Xavier, M. Rodrigues, Filter design with secrecy constraints: the MIMO Gaussian wiretap channel, IEEE Transactions on Signal Processing, vol. 61, no. 15, pp. 3799-3814, 2013
[21] Dragana Bajovic, João Xavier, J. M. Moura, B. Sinopoli, Consensus and products of random stochastic matrices: exact rate for convergence in probability, IEEE Transactions on Signal Processing, vol. 61, no. 10, pp. 2557-2571, 2013
[22] M. Paladini, Alessio Del Bue, João Xavier, L. Agapito, Marco Stošić, M. Dodig, Optimal metric projections for deformable and articulated structure-from-motion, International Journal of Computer Vision, 96, No.2, 252-276, 2012
[23] Dusan Jakovetic, J. M. Moura, João Xavier, Distributed Detection over Noisy Networks: Large Deviations Analysis, IEEE Transactions on Signal Processing, vol. 60, no. 8, pp. 4306-4320, August, 2012
[24] Dragana Bajovic, Dusan Jakovetic, J. M. Moura, João Xavier, B. Sinopoli, Large Deviations Performance of Consensus plus Innovations Distributed Detection With Non-Gaussian Observations, IEEE Transactions on Signal Processing, vol. 60, no. 11, pp. 59876002, November, 2012
[25] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, Distributed Basis Pursuit, IEEE Transactions on Signal Processing, vol. 60, no. 4, pp. 19421956, April, 2012
[26] P. Ekim, Robust Localization of Nodes and Time-Recursive Tracking in Sensor Networks Using Noisy Range Measurements, IEEE Transactions on Signal Processing, vol. 59, no 8, pp. 3930-3942, August, 2011
[27] João Xavier, Dusan Jakovetic, J. M. F. Moura, Cooperative convex optimization in networked systems: augmented Lagrangian algorithms with directed gossip communication, IEEE Transactions on Signal Processing, vol. 59, no.8, pp. 3889-3902, August , 2011
[28] Dragana Bajovic, B. Sinopoli, João Xavier, Sensor selection for event detection in wireless sensor networks, IEEE Transactions on Signal Processing, vol. 59, no. 10, pp. 4938-4953, 2011
[29] Dragana Bajovic, Dusan Jakovetic, João Xavier, B. Sinopoli, J. M. F. Moura, Distributed detection via Gaussian running consensus: large deviations asymptotic analysis, IEEE Transactions on Signal Processing, vol. 59, no. 9, pp. 4381-4396, September , 2011
[30] Dusan Jakovetic, João Xavier, J. M. F. Moura, Weight optimization for consensus algorithms with correlated switching topology, IEEE Transactions on Signal Processing, vol. 58, no.7, pp. 3788-3801, 2010
[31] Marco Stošić, Singular values of partially prescribed matrices, Linear Algebra and its Applications, Vol. 429, pp. 2136-2145, 2008
[32] Marko Beko, Further results on the capacity and error probability analysis of non-coherent MIMO systems in the low SNR regime, in IEEE Transactions on Signal Processing, vol. 56, no. 7, pp. 2915 - 2930, 2008 - PDF
[33] Marko Beko, Non-coherent Communication in Multiple-Antenna Systems: Receiver design and Codebook construction, IEEE Transactions on Signal Processing, Vol. 55, No. 12, pp. 5703 - 5715, 2007 - PDF
[34] Ricardo Oliveira, João Xavier, João Paulo Costeira, Multi-View Correspondence by Enforcement of Rigidity Constraints, Image and Vision Computing, Vol. 25, Issue 6, pp. 1008-1020, 2007 - PDF
[35] João Xavier, Victor Barroso, Paulo Lopes, Blind Source Separation and Channel Identification: Exploiting 2nd-Order Statistics in Bayesian Frameworks, Journal of the Brazilian Telecommunications Society (JTBS), 2004
[36] João Xavier, Victor Barroso, Jose M. F. Moura, Closed Form Correlative Coding (CFC2) Based Blind Identification of MIMO Channels: An Isometry Fitting to Second Order Statistics, IEEE Trans. on Signal Processing, 2001
[37] João Xavier, Victor Barroso, Blind Source Separation, ISI Cancellation and Carrier Phase Recovery in SDMA Systems for Mobile Communications, Wireless Personal Communications Journal, special issue on Wireless Broadband Communications, 1999
[38] Victor Barroso, Jose Moura, João Xavier, Blind Array Channel Division Multiple Access (AChDMA) for Mobile Communications, IEEE Transactions on Signal Processing, Vol. 46, no. 3, pp. 737-752, 1998
[39] João Xavier, Victor Barroso, Jose Moura, Closed-form Blind Channel Identification and Source Separation in SDMA Systems Through Correlative Coding, IEEE Journal on Selected Areas in Communications, special issue on Signal Processing for Wireless Communications, Vol. 16, no. 8, pp. 1506-1517, 1998

Book Chapters

[40] Victor Barroso, João Xavier, J. Moura, Blind Channel Identification and Source Separation in SDMA Systems, Invited article in chapter on Spatial Diversity and Source Estimation, in Antennas in Wireless Communications Handbook, Ed. Lal C. Godara, CRC Press, 2001

Conference Papers

[41] Brian Swenson, S. Kar, João Xavier, Computationally efficient learning in large-scale games: sampled fictitious play revisited, Proc. of ASILOMAR 2016 - 50th Annual Asilomar Conference on Signals, Systems, and Computers, pp. 1212-1215, Pacific Grove, CA, USA, 2017
[42] Augusto Santos, S. Kar, J. M. F. Moura, João Xavier, Thermodynamic limit of interacting particle systems over dynamical networks, Proc. of ASILOMAR 2016 - 50th Annual Asilomar Conference on Signals, Systems, and Computers, pp. 997-1000, Pacific Grove, CA, USA, 2017
[43] Brian Swenson, S. Kar, João Xavier, On robustness properties in empirical centroid fictitious play, Proc. of CDC 2015 - 54th IEEE Conference on Decision and Control, pp. 3324-3330, Osaka, Japan, 2015
[44] Brian Swenson, S. Kar, João Xavier, On asynchronous implementations of fictitious play for distributed learning, Proc. of ASILOMAR 2015 - 49th Annual Asilomar Conference on Signals, Systems, and Computers, pp. 1119-1124, Pacific Grove, CA, USA, 2015
[45] Augusto Santos, J. M. F. Moura, João Xavier, Sufficient condition for survival of the fittest in a bi-virus Epidemics, Proc. of ASILOMAR 2015 - 49th Annual Asilomar Conference on Signals, Systems, and Computers, pp. 1323-1327, Pacific Grove, CA, USA, 2015
[46] Brian Swenson, S. Kar, João Xavier, A computationally efficient implementation of fictitious play in a distributed setting, Proc. of EUPSICO 2015 - 23rd European Signal Processing Conference, pp. 1043-1047, Nice, France, 2015
[47] Sabina Zejnilović, João Xavier, João Pedro Gomes, B. Sinopoli, Selecting Observers for Source Localization via Error Exponents, Proc. of ISIT 2015 - IEEE International Symposium on Information Theory, Hong Kong, 2015
[48] João Xavier, Massive MIMO Full-Duplex Relaying with Optimal Power Allocation for Independent Multipairs, Proc. of SPAWC 2015 - 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Stockholm, Sweden , 2015 - PDF
[49] Cláudia Soares, João Xavier, João Pedro Gomes, Distributed, simple and stable network localization, Proc. of GlobalSIP - IEEE Global Conference on Signal and Information Processing, Atlanta, Georgia, USA, 2014 - PDF
[50] Brian Swenson, João Xavier, Strong Convergence to Mixed Equilibria in Fictitious Play, (CISS) 48th annual conference on information sciences and systems, Princeton University, March, 2014 - PDF
[51] João Mota, João Xavier, D-ADMM Based Distributed MPC with input-output models, 2014 IEEE Conference on Control Applications (CCA) Part of 2014 IEEE Multi-conference on Systems and Control, Antibes, France, October , 2014 - PDF
[52] Cláudia Soares, João Xavier, João Pedro Gomes, Distributed, simple and stable network localization, GlobalSIP 2014 - 2nd IEEE Global Conference on Signal and Information Processing, Atlanta, Georgia, USA, December , 2014 - PDF
[53] João Mota, João Xavier, Pedro Aguiar, M. Puschel, Distributed Compressed Sensing Algorithms: Completing the Puzzle, Proc. of GlobalSIP 2013 - IEEE Global Conference on Signal and Information Processing, Austin, USA, 2013
[54] João Mota, João Xavier, Pedro Aguiar, M. Puschel, A Unified Algorithmic Approach to Distributed Optimization, Proc. of GlobalSIP 2013 - IEEE Global Conference on Signal and Information Processing, Austin, USA, 2013
[55] João Mota, João Xavier, Pedro Aguiar, M. Puschel, Efficient Distributed Algorithms For Structured Optimization Problems, Proc. of SPAdeS-Nets 2013 - 1st IEEE/ACM Workshop on Signal Processing Advances in Sensor Networks, Philadelphia PA, USA, 2013
[56] Pinar Oguz-Ekim, João Pedro Gomes, João Xavier, Paulo Oliveira, RSS based Cooperation Sensor Network Localization with Unknown Transmit Power, Proc. of the 21st Signal Processing and Communications Applications Conference (SIU), Haspolat, Turkey, 2013 - PDF
[57] Pinar Oguz-Ekim, João Pedro Gomes, João Xavier, Paulo Oliveira, Experimental Evaluation of Simultaneous 3D Localization of Sensor Nodes and Tracking Moving Targets, Proc. of EUSIPCO 2012 - 20th European Signal Processing Conference, Bucharest, Romania, 2012 - PDF
[58] Dusan Jakovetic, J. M. Moura, João Xavier, Distributed Nesterov-like gradient algorithms, Proc. of CDC 2012 - 51st IEEE Conference on Decision and Control, Maui, Hawaii, USA, pp. 54595464, 2012
[59] Dragana Bajovic, João Xavier, B. Sinopoli, Products of stochastic matrices: Large deviation rate for Markov chain temporal dependencies, Proc. of Allerton 2012 - 50th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, USA, pp. 724729, 2012
[60] Dusan Jakovetic, J. M. Moura, João Xavier, Consensus + innovations detection: Phase transition under communication noise, Proc. of Allerton 2012 - 50th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, USA, pp. 15591563, 2012
[61] Dusan Jakovetic, J. M. Moura, João Xavier, Fast cooperative distributed learning, Proc. of ASILOMAR 2012 - 46th Annual Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA, pp. 15131517, 2012
[62] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, D-ADMM: A distributed algorithm for compressed sensing and other separable optimization problems, Proc. of ICASSP 2012 - IEEE International Conference on Acoustics, Speech and Signal Processing, Kyoto, Japan, pp. 28692872, 2012
[63] Dragana Bajovic, João Xavier, J. M. Moura, B. Sinopoli, Exact rate for convergence in probability of averaging processes via generalized min-cut, Proc. of CDC 2012 - 51st IEEE Conference on Decision and Control, Maui, Hawaii, USA, pp. 27182725, 2012
[64] Dusan Jakovetic, João Xavier, J. M. Moura, Convergence rate analysis of distributed gradient methods for smooth optimization, Proc. of TELFOR 2012 - 20th Telecommunications Forum Telfor, Belgrade, Serbia, pp. 867870, 2012
[65] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, ADMM for consensus on colored networks, Proc. of CDC 2012 - 51st IEEE Conference on Decision and Control, Maui, Hawaii, USA, pp. 51165121, 2012
[66] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, Distributed ADMM for model predictive control and congestion control, Proc. of CDC 2012 - 51st IEEE Conference on Decision and Control, Maui, Hawaii, USA, pp. 51105115, 2012
[67] Dragana Bajovic, Dusan Jakovetic, J. Moura, João Xavier, B. Sinopoli, Large deviations analysis of consensus+innovations detection in random networks, Proc. of ALLERTON 2011 - 49th Annual Allerton Conference on Communication, Control, and Computing, University of Illinois, Urbana-Champaign, USA, 2011
[68] Dragana Bajovic, Dusan Jakovetic, João Xavier, B. Sinopoli, J. Moura, Asymptotic performance of distributed detection over random networks, Proc. of ICASSP 2011 - IEEE International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic, 2011
[69] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, Basis pursuit in sensor networks, Proc. of ICASSP 2011 - IEEE International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic, 2011
[70] H. Reboredo, V. Prabhu, M. Rodrigues, João Xavier, Filter design with secrecy constraints: the MIMO Gaussian wiretap channel with zero-forcing receive filters, Proc. of ICASSP 2011 - IEEE International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic, 2011
[71] H. Reboredo, M. Rodrigues, M. Ara, João Xavier, Filter design with secrecy constraints: the degraded MIMO Gaussian wiretap channel, Proc. of VTC 2011 Spring - IEEE 73rd Vehicular Technology Conference, Budapest, Hungary, 2011
[72] Pinar Oguz-Ekim, João Pedro Gomes, João Xavier, Paulo Oliveira, A convex relaxation for approximate maximum-likelihood 2D source localization from range measurements, Proc. of ICASSP 2010 - IEEE International Conference on Acoustics, Speech and Signal Processing, Dallas, Texas, USA, 2010
[73] Alessio Del Bue, João Xavier, L. Agapito, M. Paladini, Bilinear factorization via Augmented Lagrange Multipliers, Proc. of ECCV 2010 - 11th European Conference on Computer Vision, Crete, Greece, 2010
[74] Dragana Bajovic, Dusan Jakovetic, João Xavier, B. Sinopoli, J. M. F. Moura, Distributed detection over random networks: a large deviations analysis, Proc. of Allerton 2010 - 48th Allerton Conference on Communication, Control, and Computing, Illinois, USA, 2010
[75] Dusan Jakovetic, João Xavier, J. M. F. Moura, Consensus in correlated random topologies: weights for finite time horizon, Proc. of ICASSP 2010 - IEEE International Conference on Acoustics, Speech and Signal Processing, Dallas, Texas, USA, 2010
[76] Marko Beko, João Xavier, Victor Barroso, Codebook design for communication in spread and nonspread space-time block codes-based systems, Proc. of ISWCS 2009 - 6th IEEE Symposium on Wireless Communication Systems, Sienna, Italy, 2009
[77] Dragana Bajovic, B. Sinopoli, João Xavier, Robust linear dimensionality reduction for hypothesis testing with application to sensor selection, Proc. of 47th Anual Allerton Conference on Communication, Control, and Computing, Illinois, USA, 2009
[78] Dragana Bajovic, B. Sinopoli, João Xavier, Sensor selection for hypothesis testing in wireless sensor networks: a Kullback-Leibler based approach, Proc. of CDC 2009 - 48th IEEE Conference on Decision and Control, Shanghai, China, 2009
[79] L. Agapito, Factorization for Non-Rigid and Articulated Structure using Metric Projections, Proc. of CVPR 2009 - IEEE Computer Science on Computer Vision and Pattern Recognition, Miami, USA, 2009
[80] Ricardo Ferreira, Shape from motion of nonrigid objects: the case of isometrically deformable flat surfaces, Proc. of BMVC 2009 - British Machine Vision Conference, London, UK, 2009
[81] M. Puschel, Distributed algorithms for basis pursuit, Proc. of SPARS 2009 - International Workshop on Signal Processing with Adaptive Sparse Structured Representation, Saint-Malo, France, 2009
[82] Ricardo Ferreira, Reconstruction of Isometrically Deformable Flat Surfaces in 3D from Multiple Camera Images, Proc. of ICASSP 2009 - IEEE International Conference on Acoustics, Speech, and Signal Processing, Taipei, Taiwan, 2009 - PDF
[83] Alessio Del Bue, Marco Stošić, M. Dodig, João Xavier, 2D-3D Registration of Deformable Shapes with Manifold Projection, Proc. of ICIP 2009 - IEEE International Conference on Image Processing, Cairo, Egypt, 2009 - PDF
[84] N. Delgado, F. Nunes, João Xavier, GNSS satellite selection for multiple-constellations using convex geometry, Proc. of NAVITEC 2008 - 4th ESA Workshop on Satellite Navigation User Equipment Technologies, Noordwijk, The Netherlands, 2008
[85] N. Delgado, F. Nunes, João Xavier, A geometrical approach for maximum likelihood estimation of multipath, Proc. of ION GNSS 2008 - The 21st International Technical Meeting of the Satellite Division of the Institute of Navigation, Savannah, Georgia, USA, 2008
[86] N. Monteiro, Detection of statistical periodicities in DNA by conflict and entropy minimization methods, Proc. of EUSIPCO 2008 - 16th European Signal Processing Conference, Lausanne, Switzerland, 2008
[87] Isabel Rodrigues, Fluorescence Confocal Microscopy Imaging Denoising with Photobleaching, Proc. of EMBC 2008 - 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Vancouver, British Columbia, Canada, 2008 - PDF
[88] Pedro Aguiar, Marco Stošić, Spectrally Optimal Factorization of Incomplete Matrices, Proc. of CVPR 2008 - IEEE Computer Society Conference on Computer Vision and Pattern Recognition, Anchorage, Alaska, 2008 - PDF
[89] José Rodrigues, ANSIG – An Analytic Signature for Permutation-Invariant Two-Dimensional Shape Representation, Proc. of CVPR 2008 - IEEE Computer Society Conference on Computer Vision and Pattern Recognition, Anchorage, Alaska, 2008
[90] Marko Beko, Low SNR analysis of the non-coherent MIMO channel under arbitrary channel and noise correlation structures, Proc. of SPAWC2008 - 9th IEEE Workshop on Signal Processing Advances in Wireless Communications, Recife, Brasil, 2008
[91] Marco Stošić, Globally Optimal Solution to Exploit Rigidity When Recovering Structure from Motion Under Occlusion, Proc. of ICIP 2008 - IEEE International Conference on Image Processing, San Diego, CA, USA, 2008
[92] José Rodrigues, Classification of Unlabeled Point Sets using ANSIG, Proc. of ICIP 2008 - IEEE International Conference on Image Processing, San Diego, CA, USA, 2008
[93] José Seabra, Convex Ultrasound Image Reconstruction with Log-Euclidean Priors, Proc. of EMBC 2008 - 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Vancouver, British Columbia, Canada, 2008 - PDF
[94] Marko Beko, João Xavier, Victor Barroso, Capacity and Error Probability Analysis of Non-Coherent MIMO Systems in the Low SNR Regime, Proc. ICASSP2007 - IEEE International Conference on Acoustics, Speech and Signal Processing, Honolulu, Hawaii, USA, 2007 - PDF
[95] Alex Alcocer, Paulo Oliveira, António Pascoal, João Xavier, Maximum Likelihood Attitude and Position Estimation from Pseudo-Range Measurements using Geometric Descent Optimization, Proc. CDC'06 - 45th IEEE Conference on Decision and Control, San Diego, USA, 2006
[96] João Xavier, Estimation of Attitude and Position from Range only Measurements using Geometric Descent Optimization on the Special Euclidean Group, Proc. FUSION2006 - 9th International Conference on Information Fusion, Florence, Italy, 2006 - PDF
[97] Ricardo Ferreira, João Xavier, Hessian of the Riemannian squared-distance function on connected locally symmetric spaces with applications, Proc. Controlo2006 - 7th Portuguese Conference in Automatic Control, special session on control, optimization and computation, Lisbon, Portugal, 2006 - PDF
[98] João Xavier, J. Manton, On the Generalization of AR Processes to Riemannian Manifolds, Proc. ICASSP2006 - IEEE International Conference on Acoustics, Speech and Signal Processing, Toulouse, France, 2006 - PDF
[99] Ricardo Ferreira, João Xavier, João Paulo Costeira, Victor Barroso, Newton Method for Riemannian Centroid Computation in Naturaly Reductive Homogeneous Spaces, Proc. ICASSP2006 - IEEE International Conference on Acoustics, Speech and Signal Processing, Toulouse, France , 2006 - PDF
[100] Marko Beko, João Xavier, Victor Barroso, Codebook Design for Non-Coherent Communication in Multiple-Antenna Systems, Proc. of ICASSP2006 - IEEE International Conference on Acoustics, Speech, and Signal Processing, Toulouse, France, 2006 - PDF
[101] Marko Beko, João Xavier, Victor Barroso, Codebook Design for the Non-Coherent GLRT Receiver and Low SNR MIMO Block Fading Channel, Proc. of SPAWC2006 - 7th IEEE Workshop on Signal Processing Advances in Wireless Communications, Cannes, France, 2006 - PDF
[102] Ricardo Oliveira, João Paulo Costeira, João Xavier, Contour Point Tracking by Enforcement of Rigidity Constraints, Proc. 3DIM2005 - IEEE International Conference on 3D Digital Imaging and Modeling, Ottawa, Ontario, Canada, 2005 - PDF
[103] Ricardo Oliveira, João Paulo Costeira, João Xavier, Optimal Point Correspondence through the Use of Rank Constraints, Proc. of CVPR2005 - IEEE International Conference on Computer Vision and Pattern Recognition, San Diego, USA, 2005 - PDF
[104] João Xavier, Victor Barroso, Intrinsic Variance Lower Bound (IVLB): An Extension of the Cramer-Rao Bound to Riemannian Manifolds, Proc. of ICASSP2005 - IEEE Conference on Acoustics, Speech and Signal Processing, Philadelphia, USA, 2005
[105] João Xavier, Victor Barroso, The Riemannian Geometry of Certain Parameter Estimation Problems with Singular Fisher Information Matrices, IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP'04, Vol. 2, pp. 1021-1024 , Montreal, Canada, 2004
[106] João Xavier, Victor Barroso, Geodesic Lower Bound for Parametric Estimation with Constraints, Proc. Workshop on IEEE Signal Processing Advances on Wireless Communications, SPAWC'04, Lisbon, Portugal, 2004
[107] P. Lopes, João Xavier, Victor Barroso, Exploiting 2nd Order Statistics in Bayesian Signal Reconstruction Problems, Proc. ICASSP2003 - IEEE International Conference on Acoustics, Speech and Signal Processing, Hong-Kong, 2003
[108] T. Patrao, João Xavier, Victor Barroso, An Interior Point Algorithm for Joint Symbol Detection and Multichannel Acquisition in Fast-Fading Narrowband Channels, Proc. SPAWC2003 - 4th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Rome, Italy, 2003
[109] João Xavier, Victor Barroso, Paulo Lopes, Blind Source Separation and Channel Identification: Exploiting 2nd-Order Statistics in Bayesian Frameworks, Proc. International Telecommunications Symposium, ITS2002, Natal, Brazil, 2002
[110] T. Patrao, João Xavier, Victor Barroso, Blind Symbol Detection and Channel Acquisition in Fast-Fading Wireless Systems with Space Diversity, To appear, IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2003, Hong Kong, 2002
[111] João Xavier, Victor Barroso, Intrinsic Distance Lower Bound for Unbiased Estimators on Riemannian Manifolds, Proc. IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2002, Orlando, USA, 2002
[112] João Xavier, Victor Barroso, Prewhitening of Mixing Matrices: Impact on the Contraction of Their Probability Mass Priors, Proc. International Symposium on Information Theory, ISIT2002, Lausanne, Suica, 2002
[113] João Xavier, Victor Barroso, Intrinsic Variance Lower Bound for Inference Problems on Riemannian Manifolds, Proc. 10th Mediterranean Conference on Control and Automation - MED2002- Lisboa, Portugal, 2002
[114] João Xavier, Victor Barroso, Tiago Patrao, Joint Symbol Detection and Multi-Channel Acquisition in Fast-Fading Narrowband Wireless Environments, Proc. International Telecommunications Symposium, ITS2002, Natal, Brazil, 2002
[115] João Xavier, Victor Barroso, Performance Analysis of a Second-Order Statistics Based Solution for the MIMO Channel Identification Problem, Proc. IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2001, Salt Lake City, USA, 2001
[116] João Xavier, Victor Barroso, Blind Identification of MIMO Channels Based on Correlative Coding: Performance Analysis, Proc. IEEE International Workshop on Signal Processing Advances for Wireless Communications, SPAWC'01, Taoyuan, Taiwan, R.O.C., 2001
[117] João Xavier, Victor Barroso, Second-Order Blind MIMO Channel Identification Based On Correlative Coding: Asymptotic Performance Analysis, Proc. IEEE International Symposium on Information Theory, Washington D.C., USA, 2001
[118] João Xavier, Victor Barroso, A Semi Blind Maximum Likelihood Approach for Resolving Linear Convolutive Mixtures, IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP'2000, Istanbul, Turkey, 2000
[119] João Xavier, Victor Barroso, Blind Identification of MIMO Systems Based on Source Correlative Coding, IEEE International Symposium on Information Theory, Sorrento, Italy, 2000
[120] João Xavier, Victor Barroso, Semi-Blind Maximum Likelihood Separation of Linear Convolutive Mixtures, IEEE workshop on Statistical Signal and Array Processing, SSAP 2000, Pocono Maner, USA, 2000
[121] João Xavier, Victor Barroso, A Channel Order Independent Method for Blind Equalization of SIMO/MIMO Systems, Proc. IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP' 99, USA, 1999
[122] João Xavier, Victor Barroso, Correlative Coding Approach for Blind Identification of MIMO Systems, Proc. of the 2nd IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, SPAWC' 99, USA, 1999
[123] Miloud Frikel, Victor Barroso, João Xavier, Blind Recursive Estimation of SIMO Channels, Proc. of the 2nd IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, SPAWC' 99, USA, 1999
[124] João Xavier, Victor Barroso, Polyhedral Concepts for Deterministic Blind Separation of Binary Sources, 33rd Asilomar Conference on Signals, Systems and Computers, USA, 1999
[125] João Xavier, Victor Barroso, Blind Identification of MIMO Channels: A Closed Form Solution Based on Second Order Statistics, Invited paper, Proc. Asilomar Conference on Signals, Systems and Computers, Asilomar, Pacific Grove, California, USA, 1999
[126] João Xavier, Victor Barroso, Polyhedral Methods for Blind Deterministic Separation of Binary Co – Channel Signals, IEEE GLOBECOM'99, Brasil, 1999
[127] João Xavier, Victor Barroso, Blind Direct Zero-Forcing Equalization of MIMO Channels, Proc. II Conference in Telecommunications, Portugal, 1999
[128] Miloud Frikel, Victor Barroso, João Xavier, Blind Channel Identification Using the Propagator Operator, Proc. II Conference in Telecommunications, Portugal, 1999
[129] João Xavier, Victor Barroso, J. Moura, Closed-Form Blind Identification of MIMO Channels, Proc. IEEE International Conference on Acoustics, Speech and Signal processing, ICASSP'98, pp. 3165-3168, Seattle, USA, 1998
[130] João Xavier, Victor Barroso, Low-Complexity Blind Minimum Variance Zero Forcing Equalization of SIMO Channels, Proc. IEEE International Symposium on Information Theory, 260, Boston, USA, 1998
[131] João Xavier, Victor Barroso, Blind SDMA with a signal space geometry matched algorithm, in Proc. IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP'97, pp. 3437-3440, Munich, Germany, 1997
[132] João Xavier, Victor Barroso, Separacao cega de fontes na presenca de IIS e escorregamento de fase em sistemas de acesso multiplo por divisao espacial, in Proc. I Conferencia Nacional de Telecomunicacoes, pp. 341-344, Aveiro, Portugal, 1997

PhD Theses

[133] João Xavier, Blind Identification of MIMO Channels Based on 2nd Order Statistics and Colored Inputs The Riemannian Geometry of Algorithms, Performance Analysis and Bounds over the Quotient Manifold of Identifiable Channel Classes, IST-UTL, 2002

MSc Theses

[134] João Xavier, Separacao cega de fontes e cancelamento de interferencia inter-simbolica em sistemas de comunicacao radio, Master Thesis, Instituto Superior Tecnico, Universidade Tecnica de Lisboa , 1997

Technical Reports

[135] M. Dodig, On minimizing a quadratic function on Stiefel manifolds, Technical Report, Institute for Systems and Robotics, Instituto Superior Tecnico, 2009 - PDF
[136] Alex Alcocer, Paulo Oliveira, António Pascoal, João Xavier, Maximum Likelihood Attitude and Position Estimation from Pseudo-Range Measurements using Geometric Descent Optimization, ISR Technical Report, 2006 - PDF
[1] Pedro Guerreiro, João Xavier, Distributed learning with time correlated information, IEEE Signal Processing Letters, Vol. 24, no. 11, pp. 1636-1640, November, 2017
[2] Brian Swenson, S. Kar, João Xavier, D. Leslie, Robustness properties in fictitious-play-type algorithms, SIAM Journal on Control and Optimisation, Vol. 55, No. 5, pp. 3295-3318, October, 2017
[3] Brian Swenson, S. Kar, João Xavier, Single sample fictitious play, IEEE Transactions on Automatic Control, Vol. 62, No. 11, pp. 6026-6031, May, 2017
[4] Marco Stošić, João Xavier, Marija Dodig, Projection on the intersection of convex sets, Linear Algebra and Its Applications, Vol. 509, No. 8-9, pp. 191-205, July, 2016 - PDF
[5] Dragana Bajovic, Jose M. F. Moura, João Xavier, Bruno Sinopoli, Distributed Inference Over Directed Networks: Performance Limits and Optimal Design, IEEE Transactions on Signal Image Processing, Vol. 64, No. 13, July, 2016
[6] Brian Swenson, S. Kar, João Xavier, Empirical Centroid Fictitious Play: An Approach for Distributed Learning in Multi-Agent Games, IEEE Transactions on Signal Processing, Vol. 63, No. 15, August, 2015 - PDF
[7] João Xavier, Identification of switched ARX models via convex optimization and expectation maximization, Elsevier, Journal of Process Control, vol. 28, pp. 9-16, 2015 - PDF
[8] João Xavier, Marco Stošić, On minimizing a quadratic function on Stiefel manifold, Elsevier, Linear Algebra and its Applications, Volume 475, 15 June 2015, Pages 251–264, 2015 - PDF
[9] João Mota, João Xavier, Pedro Aguiar, Distributed Optimization With Local Domains: Applications in MPC and Network Flows, IEEE Transactions on Automatic Control, 2015 - PDF
[10] Augusto Santos, João Xavier, Bi-Virus SIS Epidemics over Networks: Qualitative Analysis, IEEE Transactions on Network Science and Engineering, 2015 - PDF
[11] João Xavier, Dusan Jakovetic, Linear Convergence Rate of Class of Distributed Augmented Lagrangian Algorithms, IEEE Transactions on Automatic Control, vol. 60, no. 4, pp. 922-936, 2015 - PDF
[12] Cláudia Soares, João Xavier, João Pedro Gomes, Simple and Fast Convex Relaxation Method for Cooperative Localization in Sensor Networks Using Range Measurements, IEEE Transactions on Signal Processing, Vol. 63, No. 17, pp. 4532 - 4543, September, 2015 - PDF
[13] Cláudia Soares, João Xavier, João Pedro Gomes, Simple and fast cooperative localization for sensor networks, IEEE Transactions on Wireless Communications, vol. 13, no. 7, pp. 3951-3964, July , 2014 - PDF
[14] Dusan Jakovetic, João Xavier, Convergence Rates of Distributed Nesterov-Like Gradient Methods on Random Networks, IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 62, NO. 4, FEBRUARY, 2014 - PDF
[15] Dusan Jakovetic, João Xavier, Fast Distributed Gradient Methods, IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 59, NO. 5, MAY, 2014 - PDF
[16] Pinar Oguz-Ekim, João Pedro Gomes, João Xavier, Marco Stošić, Paulo Oliveira, An Angular Approach for Range-Based Approximate Maximum Likelihood Source Localization Through Convex Relaxation, IEEE Transactions on Wireless Communications, Vol. 13, No. 7, pp. 3951-3964, July. DOI:10.1109/TWC.2014.2314653, 2014
[17] Aamir Ahmad, José Santos-Victor, João Xavier, Pedro Lima, 3D to 2D Bijection for Spherical Objects Under Equidistant Fisheye Projection, Computer Vision and Image Understanding (CVIU), Elsevier,Vol. 125, August 2014, pp. 172–183, 2014 - PDF
[18] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, D-ADMM: A Communication-Efficient Distributed Algorithm for Separable Optimization, IEEE Transactions on Signal Processing, Vol. 6, Issue 10, pp. 2718-2723, 2013
[19] Ricardo Ferreira, João Xavier, João Paulo Costeira, Victor Barroso, Newton algorithms for riemannian distance related problems on connected locally symmetric manifolds, IEEE Journal of Selected Topics in Signal Processing, Vol. 7, No. 4, pp. 634-645, August, 2013 - PDF
[20] H. Reboredo, João Xavier, M. Rodrigues, Filter design with secrecy constraints: the MIMO Gaussian wiretap channel, IEEE Transactions on Signal Processing, vol. 61, no. 15, pp. 3799-3814, 2013
[21] Dragana Bajovic, João Xavier, J. M. Moura, B. Sinopoli, Consensus and products of random stochastic matrices: exact rate for convergence in probability, IEEE Transactions on Signal Processing, vol. 61, no. 10, pp. 2557-2571, 2013
[22] M. Paladini, Alessio Del Bue, João Xavier, L. Agapito, Marco Stošić, M. Dodig, Optimal metric projections for deformable and articulated structure-from-motion, International Journal of Computer Vision, 96, No.2, 252-276, 2012
[23] Dusan Jakovetic, J. M. Moura, João Xavier, Distributed Detection over Noisy Networks: Large Deviations Analysis, IEEE Transactions on Signal Processing, vol. 60, no. 8, pp. 4306-4320, August, 2012
[24] Dragana Bajovic, Dusan Jakovetic, J. M. Moura, João Xavier, B. Sinopoli, Large Deviations Performance of Consensus plus Innovations Distributed Detection With Non-Gaussian Observations, IEEE Transactions on Signal Processing, vol. 60, no. 11, pp. 59876002, November, 2012
[25] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, Distributed Basis Pursuit, IEEE Transactions on Signal Processing, vol. 60, no. 4, pp. 19421956, April, 2012
[26] P. Ekim, Robust Localization of Nodes and Time-Recursive Tracking in Sensor Networks Using Noisy Range Measurements, IEEE Transactions on Signal Processing, vol. 59, no 8, pp. 3930-3942, August, 2011
[27] João Xavier, Dusan Jakovetic, J. M. F. Moura, Cooperative convex optimization in networked systems: augmented Lagrangian algorithms with directed gossip communication, IEEE Transactions on Signal Processing, vol. 59, no.8, pp. 3889-3902, August , 2011
[28] Dragana Bajovic, B. Sinopoli, João Xavier, Sensor selection for event detection in wireless sensor networks, IEEE Transactions on Signal Processing, vol. 59, no. 10, pp. 4938-4953, 2011
[29] Dragana Bajovic, Dusan Jakovetic, João Xavier, B. Sinopoli, J. M. F. Moura, Distributed detection via Gaussian running consensus: large deviations asymptotic analysis, IEEE Transactions on Signal Processing, vol. 59, no. 9, pp. 4381-4396, September , 2011
[30] Dusan Jakovetic, João Xavier, J. M. F. Moura, Weight optimization for consensus algorithms with correlated switching topology, IEEE Transactions on Signal Processing, vol. 58, no.7, pp. 3788-3801, 2010
[31] Marco Stošić, Singular values of partially prescribed matrices, Linear Algebra and its Applications, Vol. 429, pp. 2136-2145, 2008
[32] Marko Beko, Further results on the capacity and error probability analysis of non-coherent MIMO systems in the low SNR regime, in IEEE Transactions on Signal Processing, vol. 56, no. 7, pp. 2915 - 2930, 2008 - PDF
[33] Marko Beko, Non-coherent Communication in Multiple-Antenna Systems: Receiver design and Codebook construction, IEEE Transactions on Signal Processing, Vol. 55, No. 12, pp. 5703 - 5715, 2007 - PDF
[34] Ricardo Oliveira, João Xavier, João Paulo Costeira, Multi-View Correspondence by Enforcement of Rigidity Constraints, Image and Vision Computing, Vol. 25, Issue 6, pp. 1008-1020, 2007 - PDF
[35] João Xavier, Victor Barroso, Paulo Lopes, Blind Source Separation and Channel Identification: Exploiting 2nd-Order Statistics in Bayesian Frameworks, Journal of the Brazilian Telecommunications Society (JTBS), 2004
[36] João Xavier, Victor Barroso, Jose M. F. Moura, Closed Form Correlative Coding (CFC2) Based Blind Identification of MIMO Channels: An Isometry Fitting to Second Order Statistics, IEEE Trans. on Signal Processing, 2001
[37] João Xavier, Victor Barroso, Blind Source Separation, ISI Cancellation and Carrier Phase Recovery in SDMA Systems for Mobile Communications, Wireless Personal Communications Journal, special issue on Wireless Broadband Communications, 1999
[38] Victor Barroso, Jose Moura, João Xavier, Blind Array Channel Division Multiple Access (AChDMA) for Mobile Communications, IEEE Transactions on Signal Processing, Vol. 46, no. 3, pp. 737-752, 1998
[39] João Xavier, Victor Barroso, Jose Moura, Closed-form Blind Channel Identification and Source Separation in SDMA Systems Through Correlative Coding, IEEE Journal on Selected Areas in Communications, special issue on Signal Processing for Wireless Communications, Vol. 16, no. 8, pp. 1506-1517, 1998
[1] Victor Barroso, João Xavier, J. Moura, Blind Channel Identification and Source Separation in SDMA Systems, Invited article in chapter on Spatial Diversity and Source Estimation, in Antennas in Wireless Communications Handbook, Ed. Lal C. Godara, CRC Press, 2001
[1] Brian Swenson, S. Kar, João Xavier, Computationally efficient learning in large-scale games: sampled fictitious play revisited, Proc. of ASILOMAR 2016 - 50th Annual Asilomar Conference on Signals, Systems, and Computers, pp. 1212-1215, Pacific Grove, CA, USA, 2017
[2] Augusto Santos, S. Kar, J. M. F. Moura, João Xavier, Thermodynamic limit of interacting particle systems over dynamical networks, Proc. of ASILOMAR 2016 - 50th Annual Asilomar Conference on Signals, Systems, and Computers, pp. 997-1000, Pacific Grove, CA, USA, 2017
[3] Brian Swenson, S. Kar, João Xavier, On robustness properties in empirical centroid fictitious play, Proc. of CDC 2015 - 54th IEEE Conference on Decision and Control, pp. 3324-3330, Osaka, Japan, 2015
[4] Brian Swenson, S. Kar, João Xavier, On asynchronous implementations of fictitious play for distributed learning, Proc. of ASILOMAR 2015 - 49th Annual Asilomar Conference on Signals, Systems, and Computers, pp. 1119-1124, Pacific Grove, CA, USA, 2015
[5] Augusto Santos, J. M. F. Moura, João Xavier, Sufficient condition for survival of the fittest in a bi-virus Epidemics, Proc. of ASILOMAR 2015 - 49th Annual Asilomar Conference on Signals, Systems, and Computers, pp. 1323-1327, Pacific Grove, CA, USA, 2015
[6] Brian Swenson, S. Kar, João Xavier, A computationally efficient implementation of fictitious play in a distributed setting, Proc. of EUPSICO 2015 - 23rd European Signal Processing Conference, pp. 1043-1047, Nice, France, 2015
[7] Sabina Zejnilović, João Xavier, João Pedro Gomes, B. Sinopoli, Selecting Observers for Source Localization via Error Exponents, Proc. of ISIT 2015 - IEEE International Symposium on Information Theory, Hong Kong, 2015
[8] João Xavier, Massive MIMO Full-Duplex Relaying with Optimal Power Allocation for Independent Multipairs, Proc. of SPAWC 2015 - 16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Stockholm, Sweden , 2015 - PDF
[9] Cláudia Soares, João Xavier, João Pedro Gomes, Distributed, simple and stable network localization, Proc. of GlobalSIP - IEEE Global Conference on Signal and Information Processing, Atlanta, Georgia, USA, 2014 - PDF
[10] Brian Swenson, João Xavier, Strong Convergence to Mixed Equilibria in Fictitious Play, (CISS) 48th annual conference on information sciences and systems, Princeton University, March, 2014 - PDF
[11] João Mota, João Xavier, D-ADMM Based Distributed MPC with input-output models, 2014 IEEE Conference on Control Applications (CCA) Part of 2014 IEEE Multi-conference on Systems and Control, Antibes, France, October , 2014 - PDF
[12] Cláudia Soares, João Xavier, João Pedro Gomes, Distributed, simple and stable network localization, GlobalSIP 2014 - 2nd IEEE Global Conference on Signal and Information Processing, Atlanta, Georgia, USA, December , 2014 - PDF
[13] João Mota, João Xavier, Pedro Aguiar, M. Puschel, Distributed Compressed Sensing Algorithms: Completing the Puzzle, Proc. of GlobalSIP 2013 - IEEE Global Conference on Signal and Information Processing, Austin, USA, 2013
[14] João Mota, João Xavier, Pedro Aguiar, M. Puschel, A Unified Algorithmic Approach to Distributed Optimization, Proc. of GlobalSIP 2013 - IEEE Global Conference on Signal and Information Processing, Austin, USA, 2013
[15] João Mota, João Xavier, Pedro Aguiar, M. Puschel, Efficient Distributed Algorithms For Structured Optimization Problems, Proc. of SPAdeS-Nets 2013 - 1st IEEE/ACM Workshop on Signal Processing Advances in Sensor Networks, Philadelphia PA, USA, 2013
[16] Pinar Oguz-Ekim, João Pedro Gomes, João Xavier, Paulo Oliveira, RSS based Cooperation Sensor Network Localization with Unknown Transmit Power, Proc. of the 21st Signal Processing and Communications Applications Conference (SIU), Haspolat, Turkey, 2013 - PDF
[17] Pinar Oguz-Ekim, João Pedro Gomes, João Xavier, Paulo Oliveira, Experimental Evaluation of Simultaneous 3D Localization of Sensor Nodes and Tracking Moving Targets, Proc. of EUSIPCO 2012 - 20th European Signal Processing Conference, Bucharest, Romania, 2012 - PDF
[18] Dusan Jakovetic, J. M. Moura, João Xavier, Distributed Nesterov-like gradient algorithms, Proc. of CDC 2012 - 51st IEEE Conference on Decision and Control, Maui, Hawaii, USA, pp. 54595464, 2012
[19] Dragana Bajovic, João Xavier, B. Sinopoli, Products of stochastic matrices: Large deviation rate for Markov chain temporal dependencies, Proc. of Allerton 2012 - 50th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, USA, pp. 724729, 2012
[20] Dusan Jakovetic, J. M. Moura, João Xavier, Consensus + innovations detection: Phase transition under communication noise, Proc. of Allerton 2012 - 50th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, USA, pp. 15591563, 2012
[21] Dusan Jakovetic, J. M. Moura, João Xavier, Fast cooperative distributed learning, Proc. of ASILOMAR 2012 - 46th Annual Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA, pp. 15131517, 2012
[22] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, D-ADMM: A distributed algorithm for compressed sensing and other separable optimization problems, Proc. of ICASSP 2012 - IEEE International Conference on Acoustics, Speech and Signal Processing, Kyoto, Japan, pp. 28692872, 2012
[23] Dragana Bajovic, João Xavier, J. M. Moura, B. Sinopoli, Exact rate for convergence in probability of averaging processes via generalized min-cut, Proc. of CDC 2012 - 51st IEEE Conference on Decision and Control, Maui, Hawaii, USA, pp. 27182725, 2012
[24] Dusan Jakovetic, João Xavier, J. M. Moura, Convergence rate analysis of distributed gradient methods for smooth optimization, Proc. of TELFOR 2012 - 20th Telecommunications Forum Telfor, Belgrade, Serbia, pp. 867870, 2012
[25] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, ADMM for consensus on colored networks, Proc. of CDC 2012 - 51st IEEE Conference on Decision and Control, Maui, Hawaii, USA, pp. 51165121, 2012
[26] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, Distributed ADMM for model predictive control and congestion control, Proc. of CDC 2012 - 51st IEEE Conference on Decision and Control, Maui, Hawaii, USA, pp. 51105115, 2012
[27] Dragana Bajovic, Dusan Jakovetic, J. Moura, João Xavier, B. Sinopoli, Large deviations analysis of consensus+innovations detection in random networks, Proc. of ALLERTON 2011 - 49th Annual Allerton Conference on Communication, Control, and Computing, University of Illinois, Urbana-Champaign, USA, 2011
[28] Dragana Bajovic, Dusan Jakovetic, João Xavier, B. Sinopoli, J. Moura, Asymptotic performance of distributed detection over random networks, Proc. of ICASSP 2011 - IEEE International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic, 2011
[29] João Mota, João Xavier, Pedro Aguiar, M. Pueschel, Basis pursuit in sensor networks, Proc. of ICASSP 2011 - IEEE International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic, 2011
[30] H. Reboredo, V. Prabhu, M. Rodrigues, João Xavier, Filter design with secrecy constraints: the MIMO Gaussian wiretap channel with zero-forcing receive filters, Proc. of ICASSP 2011 - IEEE International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic, 2011
[31] H. Reboredo, M. Rodrigues, M. Ara, João Xavier, Filter design with secrecy constraints: the degraded MIMO Gaussian wiretap channel, Proc. of VTC 2011 Spring - IEEE 73rd Vehicular Technology Conference, Budapest, Hungary, 2011
[32] Pinar Oguz-Ekim, João Pedro Gomes, João Xavier, Paulo Oliveira, A convex relaxation for approximate maximum-likelihood 2D source localization from range measurements, Proc. of ICASSP 2010 - IEEE International Conference on Acoustics, Speech and Signal Processing, Dallas, Texas, USA, 2010
[33] Alessio Del Bue, João Xavier, L. Agapito, M. Paladini, Bilinear factorization via Augmented Lagrange Multipliers, Proc. of ECCV 2010 - 11th European Conference on Computer Vision, Crete, Greece, 2010
[34] Dragana Bajovic, Dusan Jakovetic, João Xavier, B. Sinopoli, J. M. F. Moura, Distributed detection over random networks: a large deviations analysis, Proc. of Allerton 2010 - 48th Allerton Conference on Communication, Control, and Computing, Illinois, USA, 2010
[35] Dusan Jakovetic, João Xavier, J. M. F. Moura, Consensus in correlated random topologies: weights for finite time horizon, Proc. of ICASSP 2010 - IEEE International Conference on Acoustics, Speech and Signal Processing, Dallas, Texas, USA, 2010
[36] Marko Beko, João Xavier, Victor Barroso, Codebook design for communication in spread and nonspread space-time block codes-based systems, Proc. of ISWCS 2009 - 6th IEEE Symposium on Wireless Communication Systems, Sienna, Italy, 2009
[37] Dragana Bajovic, B. Sinopoli, João Xavier, Robust linear dimensionality reduction for hypothesis testing with application to sensor selection, Proc. of 47th Anual Allerton Conference on Communication, Control, and Computing, Illinois, USA, 2009
[38] Dragana Bajovic, B. Sinopoli, João Xavier, Sensor selection for hypothesis testing in wireless sensor networks: a Kullback-Leibler based approach, Proc. of CDC 2009 - 48th IEEE Conference on Decision and Control, Shanghai, China, 2009
[39] L. Agapito, Factorization for Non-Rigid and Articulated Structure using Metric Projections, Proc. of CVPR 2009 - IEEE Computer Science on Computer Vision and Pattern Recognition, Miami, USA, 2009
[40] Ricardo Ferreira, Shape from motion of nonrigid objects: the case of isometrically deformable flat surfaces, Proc. of BMVC 2009 - British Machine Vision Conference, London, UK, 2009
[41] M. Puschel, Distributed algorithms for basis pursuit, Proc. of SPARS 2009 - International Workshop on Signal Processing with Adaptive Sparse Structured Representation, Saint-Malo, France, 2009
[42] Ricardo Ferreira, Reconstruction of Isometrically Deformable Flat Surfaces in 3D from Multiple Camera Images, Proc. of ICASSP 2009 - IEEE International Conference on Acoustics, Speech, and Signal Processing, Taipei, Taiwan, 2009 - PDF
[43] Alessio Del Bue, Marco Stošić, M. Dodig, João Xavier, 2D-3D Registration of Deformable Shapes with Manifold Projection, Proc. of ICIP 2009 - IEEE International Conference on Image Processing, Cairo, Egypt, 2009 - PDF
[44] N. Delgado, F. Nunes, João Xavier, GNSS satellite selection for multiple-constellations using convex geometry, Proc. of NAVITEC 2008 - 4th ESA Workshop on Satellite Navigation User Equipment Technologies, Noordwijk, The Netherlands, 2008
[45] N. Delgado, F. Nunes, João Xavier, A geometrical approach for maximum likelihood estimation of multipath, Proc. of ION GNSS 2008 - The 21st International Technical Meeting of the Satellite Division of the Institute of Navigation, Savannah, Georgia, USA, 2008
[46] N. Monteiro, Detection of statistical periodicities in DNA by conflict and entropy minimization methods, Proc. of EUSIPCO 2008 - 16th European Signal Processing Conference, Lausanne, Switzerland, 2008
[47] Isabel Rodrigues, Fluorescence Confocal Microscopy Imaging Denoising with Photobleaching, Proc. of EMBC 2008 - 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Vancouver, British Columbia, Canada, 2008 - PDF
[48] Pedro Aguiar, Marco Stošić, Spectrally Optimal Factorization of Incomplete Matrices, Proc. of CVPR 2008 - IEEE Computer Society Conference on Computer Vision and Pattern Recognition, Anchorage, Alaska, 2008 - PDF
[49] José Rodrigues, ANSIG – An Analytic Signature for Permutation-Invariant Two-Dimensional Shape Representation, Proc. of CVPR 2008 - IEEE Computer Society Conference on Computer Vision and Pattern Recognition, Anchorage, Alaska, 2008
[50] Marko Beko, Low SNR analysis of the non-coherent MIMO channel under arbitrary channel and noise correlation structures, Proc. of SPAWC2008 - 9th IEEE Workshop on Signal Processing Advances in Wireless Communications, Recife, Brasil, 2008
[51] Marco Stošić, Globally Optimal Solution to Exploit Rigidity When Recovering Structure from Motion Under Occlusion, Proc. of ICIP 2008 - IEEE International Conference on Image Processing, San Diego, CA, USA, 2008
[52] José Rodrigues, Classification of Unlabeled Point Sets using ANSIG, Proc. of ICIP 2008 - IEEE International Conference on Image Processing, San Diego, CA, USA, 2008
[53] José Seabra, Convex Ultrasound Image Reconstruction with Log-Euclidean Priors, Proc. of EMBC 2008 - 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Vancouver, British Columbia, Canada, 2008 - PDF
[54] Marko Beko, João Xavier, Victor Barroso, Capacity and Error Probability Analysis of Non-Coherent MIMO Systems in the Low SNR Regime, Proc. ICASSP2007 - IEEE International Conference on Acoustics, Speech and Signal Processing, Honolulu, Hawaii, USA, 2007 - PDF
[55] Alex Alcocer, Paulo Oliveira, António Pascoal, João Xavier, Maximum Likelihood Attitude and Position Estimation from Pseudo-Range Measurements using Geometric Descent Optimization, Proc. CDC'06 - 45th IEEE Conference on Decision and Control, San Diego, USA, 2006
[56] João Xavier, Estimation of Attitude and Position from Range only Measurements using Geometric Descent Optimization on the Special Euclidean Group, Proc. FUSION2006 - 9th International Conference on Information Fusion, Florence, Italy, 2006 - PDF
[57] Ricardo Ferreira, João Xavier, Hessian of the Riemannian squared-distance function on connected locally symmetric spaces with applications, Proc. Controlo2006 - 7th Portuguese Conference in Automatic Control, special session on control, optimization and computation, Lisbon, Portugal, 2006 - PDF
[58] João Xavier, J. Manton, On the Generalization of AR Processes to Riemannian Manifolds, Proc. ICASSP2006 - IEEE International Conference on Acoustics, Speech and Signal Processing, Toulouse, France, 2006 - PDF
[59] Ricardo Ferreira, João Xavier, João Paulo Costeira, Victor Barroso, Newton Method for Riemannian Centroid Computation in Naturaly Reductive Homogeneous Spaces, Proc. ICASSP2006 - IEEE International Conference on Acoustics, Speech and Signal Processing, Toulouse, France , 2006 - PDF
[60] Marko Beko, João Xavier, Victor Barroso, Codebook Design for Non-Coherent Communication in Multiple-Antenna Systems, Proc. of ICASSP2006 - IEEE International Conference on Acoustics, Speech, and Signal Processing, Toulouse, France, 2006 - PDF
[61] Marko Beko, João Xavier, Victor Barroso, Codebook Design for the Non-Coherent GLRT Receiver and Low SNR MIMO Block Fading Channel, Proc. of SPAWC2006 - 7th IEEE Workshop on Signal Processing Advances in Wireless Communications, Cannes, France, 2006 - PDF
[62] Ricardo Oliveira, João Paulo Costeira, João Xavier, Contour Point Tracking by Enforcement of Rigidity Constraints, Proc. 3DIM2005 - IEEE International Conference on 3D Digital Imaging and Modeling, Ottawa, Ontario, Canada, 2005 - PDF
[63] Ricardo Oliveira, João Paulo Costeira, João Xavier, Optimal Point Correspondence through the Use of Rank Constraints, Proc. of CVPR2005 - IEEE International Conference on Computer Vision and Pattern Recognition, San Diego, USA, 2005 - PDF
[64] João Xavier, Victor Barroso, Intrinsic Variance Lower Bound (IVLB): An Extension of the Cramer-Rao Bound to Riemannian Manifolds, Proc. of ICASSP2005 - IEEE Conference on Acoustics, Speech and Signal Processing, Philadelphia, USA, 2005
[65] João Xavier, Victor Barroso, The Riemannian Geometry of Certain Parameter Estimation Problems with Singular Fisher Information Matrices, IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP'04, Vol. 2, pp. 1021-1024 , Montreal, Canada, 2004
[66] João Xavier, Victor Barroso, Geodesic Lower Bound for Parametric Estimation with Constraints, Proc. Workshop on IEEE Signal Processing Advances on Wireless Communications, SPAWC'04, Lisbon, Portugal, 2004
[67] P. Lopes, João Xavier, Victor Barroso, Exploiting 2nd Order Statistics in Bayesian Signal Reconstruction Problems, Proc. ICASSP2003 - IEEE International Conference on Acoustics, Speech and Signal Processing, Hong-Kong, 2003
[68] T. Patrao, João Xavier, Victor Barroso, An Interior Point Algorithm for Joint Symbol Detection and Multichannel Acquisition in Fast-Fading Narrowband Channels, Proc. SPAWC2003 - 4th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Rome, Italy, 2003
[69] João Xavier, Victor Barroso, Paulo Lopes, Blind Source Separation and Channel Identification: Exploiting 2nd-Order Statistics in Bayesian Frameworks, Proc. International Telecommunications Symposium, ITS2002, Natal, Brazil, 2002
[70] T. Patrao, João Xavier, Victor Barroso, Blind Symbol Detection and Channel Acquisition in Fast-Fading Wireless Systems with Space Diversity, To appear, IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2003, Hong Kong, 2002
[71] João Xavier, Victor Barroso, Intrinsic Distance Lower Bound for Unbiased Estimators on Riemannian Manifolds, Proc. IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2002, Orlando, USA, 2002
[72] João Xavier, Victor Barroso, Prewhitening of Mixing Matrices: Impact on the Contraction of Their Probability Mass Priors, Proc. International Symposium on Information Theory, ISIT2002, Lausanne, Suica, 2002
[73] João Xavier, Victor Barroso, Intrinsic Variance Lower Bound for Inference Problems on Riemannian Manifolds, Proc. 10th Mediterranean Conference on Control and Automation - MED2002- Lisboa, Portugal, 2002
[74] João Xavier, Victor Barroso, Tiago Patrao, Joint Symbol Detection and Multi-Channel Acquisition in Fast-Fading Narrowband Wireless Environments, Proc. International Telecommunications Symposium, ITS2002, Natal, Brazil, 2002
[75] João Xavier, Victor Barroso, Performance Analysis of a Second-Order Statistics Based Solution for the MIMO Channel Identification Problem, Proc. IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2001, Salt Lake City, USA, 2001
[76] João Xavier, Victor Barroso, Blind Identification of MIMO Channels Based on Correlative Coding: Performance Analysis, Proc. IEEE International Workshop on Signal Processing Advances for Wireless Communications, SPAWC'01, Taoyuan, Taiwan, R.O.C., 2001
[77] João Xavier, Victor Barroso, Second-Order Blind MIMO Channel Identification Based On Correlative Coding: Asymptotic Performance Analysis, Proc. IEEE International Symposium on Information Theory, Washington D.C., USA, 2001
[78] João Xavier, Victor Barroso, A Semi Blind Maximum Likelihood Approach for Resolving Linear Convolutive Mixtures, IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP'2000, Istanbul, Turkey, 2000
[79] João Xavier, Victor Barroso, Blind Identification of MIMO Systems Based on Source Correlative Coding, IEEE International Symposium on Information Theory, Sorrento, Italy, 2000
[80] João Xavier, Victor Barroso, Semi-Blind Maximum Likelihood Separation of Linear Convolutive Mixtures, IEEE workshop on Statistical Signal and Array Processing, SSAP 2000, Pocono Maner, USA, 2000
[81] João Xavier, Victor Barroso, A Channel Order Independent Method for Blind Equalization of SIMO/MIMO Systems, Proc. IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP' 99, USA, 1999
[82] João Xavier, Victor Barroso, Correlative Coding Approach for Blind Identification of MIMO Systems, Proc. of the 2nd IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, SPAWC' 99, USA, 1999
[83] Miloud Frikel, Victor Barroso, João Xavier, Blind Recursive Estimation of SIMO Channels, Proc. of the 2nd IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, SPAWC' 99, USA, 1999
[84] João Xavier, Victor Barroso, Polyhedral Concepts for Deterministic Blind Separation of Binary Sources, 33rd Asilomar Conference on Signals, Systems and Computers, USA, 1999
[85] João Xavier, Victor Barroso, Blind Identification of MIMO Channels: A Closed Form Solution Based on Second Order Statistics, Invited paper, Proc. Asilomar Conference on Signals, Systems and Computers, Asilomar, Pacific Grove, California, USA, 1999
[86] João Xavier, Victor Barroso, Polyhedral Methods for Blind Deterministic Separation of Binary Co – Channel Signals, IEEE GLOBECOM'99, Brasil, 1999
[87] João Xavier, Victor Barroso, Blind Direct Zero-Forcing Equalization of MIMO Channels, Proc. II Conference in Telecommunications, Portugal, 1999
[88] Miloud Frikel, Victor Barroso, João Xavier, Blind Channel Identification Using the Propagator Operator, Proc. II Conference in Telecommunications, Portugal, 1999
[89] João Xavier, Victor Barroso, J. Moura, Closed-Form Blind Identification of MIMO Channels, Proc. IEEE International Conference on Acoustics, Speech and Signal processing, ICASSP'98, pp. 3165-3168, Seattle, USA, 1998
[90] João Xavier, Victor Barroso, Low-Complexity Blind Minimum Variance Zero Forcing Equalization of SIMO Channels, Proc. IEEE International Symposium on Information Theory, 260, Boston, USA, 1998
[91] João Xavier, Victor Barroso, Blind SDMA with a signal space geometry matched algorithm, in Proc. IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP'97, pp. 3437-3440, Munich, Germany, 1997
[92] João Xavier, Victor Barroso, Separacao cega de fontes na presenca de IIS e escorregamento de fase em sistemas de acesso multiplo por divisao espacial, in Proc. I Conferencia Nacional de Telecomunicacoes, pp. 341-344, Aveiro, Portugal, 1997
[1] João Xavier, Separacao cega de fontes e cancelamento de interferencia inter-simbolica em sistemas de comunicacao radio, Master Thesis, Instituto Superior Tecnico, Universidade Tecnica de Lisboa , 1997

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