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  • Stochastic estimation of the Frobenius norm in the ACA convergence criterion  Open access

     Heldring, Alexander; Ubeda Farre, Eduardo; Rius Casals, Juan-manuel
    IEEE transactions on antennas and propagation
    Vol. 63, num. 3, p. 1155-1159
    DOI: 10.1109/TAP.2014.2386306
    Date of publication: 2015-03-01
    Journal article
    Access to the full text
  • Nonconforming discretization of the electric-field integral equation for closed perfectly conducting objects

     Ubeda Farre, Eduardo; Rius Casals, Juan-manuel; Heldring, Alexander
    IEEE transactions on antennas and propagation
    Vol. 62, num. 8, p. 4171-4186
    DOI: 10.1109/TAP.2014.2325954
    Date of publication: 2014-08-01
    Journal article
    Image
  • Regularization of the 2D TE-EFIE for homogeneous objects discretized by the Method of Moments with discontinuous basis functions

     Sekulic, Ivan; Ubeda Farre, Eduardo; Rius Casals, Juan-manuel; Heldring, Alexander
    International Conference on Electromagnetics in Advanced Applications
    p. 500-502
    DOI: 10.1109/ICEAA.2014.6903906
    Presentation's date: 2014-08
    Presentation of work at congresses
    Image
  • On the convergence of the ACA algorithm for radiation and scattering problems

     Heldring, Alexander; Ubeda Farre, Eduardo; Rius Casals, Juan-manuel
    IEEE transactions on antennas and propagation
    Vol. 62, num. 7, p. 3806-3809
    DOI: 10.1109/TAP.2014.2316293
    Date of publication: 2014-07-01
    Journal article
    Image
  • Volumetric testing with wedges for a nonconforming discretization of the Electric-Field Integral Equation

     Ubeda Farre, Eduardo; Rius Casals, Juan-manuel; Heldring, Alexander
    IEEE International Symposium on Antennas and Propagation
    p. 2192-2193
    DOI: 10.1109/APS.2014.6905423
    Presentation's date: 2014-07
    Presentation of work at congresses
    Image
  • Nonconforming discretization of the Magnetic-Field Integral Equation with volumetric testing

     Ubeda Farre, Eduardo; Rius Casals, Juan-manuel; Heldring, Alexander
    IEEE International Symposium on Antennas and Propagation
    p. 2194-2195
    DOI: 10.1109/APS.2014.6905424
    Presentation's date: 2014-07
    Presentation of work at congresses
    Image
  • New graphical processing technique for fast shadowing computation in PO surface integral

     Rius Casals, Juan-manuel; Carbo Meseguer, Alexis; Bjerkemo, Jakob; Ubeda Farre, Eduardo; Heldring, Alexander; Mallorqui Franquet, Jordi Joan; Broquetas Ibars, Antoni
    IEEE transactions on antennas and propagation
    Vol. 62, num. 5, p. 2587-2595
    DOI: 10.1109/TAP.2014.2307321
    Date of publication: 2014-05-01
    Journal article
    Image
  • Grup de Teledetecció, Antenes, Microones i Superconductivitat

     Aguasca Sole, Alberto; Barlabe Dalmau, Antoni; Blanch Boris, Sebastian; Broquetas Ibars, Antoni; Camps Carmona, Adriano Jose; Cardama Aznar, Angel; Elias Fuste, Antonio; Duffo Ubeda, Nuria; Fabregas Canovas, Francisco Javier; Jofre Roca, Luis; Heldring, Alexander; López Martínez, Carlos; Mallorqui Franquet, Jordi Joan; O'callaghan Castella, Juan Manuel; Pradell Cara, Lluis; Rius Casals, Juan-manuel; Romeu Robert, Jordi; Torres Torres, Francisco; Ubeda Farre, Eduardo; Vall-llossera Ferran, Mercedes Magdalena; Duran Martinez, Israel; Wu, Lin; Gilasgar, Mitra; Lort Cuenca, Marc; Imbert Villa, Marc; Martin Alemany, Francisco; Chaparro Danon, David; Pablos Hernandez, Miriam; Pascual Biosca, Daniel; Park, Hyuk; Alonso Arroyo, Alberto; Onrubia Ibañez, Raul; Yam Ontiveros, Luis Eduardo; Rodriguez Silva, Juan Carlos; Piles Guillem, Maria; Deng, Xinping; Querol Borras, Jorge; Corbella Sanahuja, Ignasi
    Competitive project
  • Iterative method of moments solution of problems involving electrically large and concave geometries

     Heldring, Alexander; Rius Casals, Juan-manuel; Ubeda Farre, Eduardo
    International Conference on Electromagnetics in Advanced Applications
    p. 266-269
    DOI: 10.1109/ICEAA.2013.6632235
    Presentation's date: 2013-09-09
    Presentation of work at congresses
    Image
  • Volumetric testing for a nonconforming discretization in method of moments of the electric-field surface integral equation

     Ubeda Farre, Eduardo; Rius Casals, Juan-manuel; Heldring, Alexander
    International Conference on Electromagnetics in Advanced Applications
    p. 121-124
    DOI: 10.1109/ICEAA.2013.6632202
    Presentation's date: 2013-09
    Presentation of work at congresses
    Image
  • Discretization of the EFIE in Method of Moments without continuity of the normal current component across edges

     Ubeda Farre, Eduardo; Rius Casals, Juan-manuel; Heldring, Alexander
    IEEE International Symposium on Antennas and Propagation
    p. 448-449
    DOI: 10.1109/APS.2013.6710885
    Presentation's date: 2013-07-08
    Presentation of work at congresses
  • Preconditioning the Electric Field Integral Equation with the MS-CBD method

     Heldring, Alexander; Ubeda Farre, Eduardo; Rius Casals, Juan-manuel
    Iberian Meeting on Computational Electromagnetics
    Presentation's date: 2013-05-14
    Presentation of work at congresses
    Image
  • Fast shadowing computation in physical optics surface

     Rius Casals, Juan-manuel; Carbo, Alex; Ubeda Farre, Eduardo; Heldring, Alexander
    Iberian Meeting on Computational Electromagnetics
    Presentation's date: 2013-05-14
    Presentation of work at congresses
    Image
  • GRECO Code Rejuvenated: hybrid CPU-graphical processing

     Rius Casals, Juan-manuel; Carbo, Alex; Ubeda Farre, Eduardo; Heldring, Alexander
    European Conference on Antennas and Propagation
    p. 2348-2351
    Presentation's date: 2013-04-10
    Presentation of work at congresses
    Image
  • The multiscale compressed block decomposition as a preconditioner for method of moments computations

     Heldring, Alexander; Ubeda Farre, Eduardo; Rius Casals, Juan-manuel
    European Conference on Antennas and Propagation
    p. 390-393
    Presentation's date: 2013-04-08
    Presentation of work at congresses
    Image
  • Stable discretization of the electric-magnetic field integral equation with the taylor-orthogonal basis functions

     Ubeda Farre, Eduardo; Tamayo Palau, José María; Rius Casals, Juan-manuel; Heldring, Alexander
    IEEE transactions on antennas and propagation
    Vol. 61, num. 3, p. 1484-1490
    DOI: 10.1109/TAP.2012.2227925
    Date of publication: 2013-03
    Journal article
    Image
  • Accelerated direct solution of the method-of-moments linear system

     Heldring, Alexander; Tamayo Palau, José María; Ubeda Farre, Eduardo; Rius Casals, Juan-manuel
    Proceedings of the IEEE
    Vol. 101, num. 2, p. 364-371
    DOI: 10.1109/JPROC.2012.2193369
    Date of publication: 2013-02
    Journal article
    Image
  • Sparsified adaptive cross approximation algorithm for accelerated method of moments computations

     Heldring, Alexander; Tamayo Palau, José María; Simon, Carine; Ubeda Farre, Eduardo; Rius Casals, Juan-manuel
    IEEE transactions on antennas and propagation
    Vol. 61, num. 1, p. 240-246
    DOI: 10.1109/TAP.2012.2215292
    Date of publication: 2013-01
    Journal article
    Image
  • Dispositivos pasivos avanzados para cabezales multibanda, multimodo

     Rocas Cantenys, Eduard; Mateu Mateu, Jordi; Heldring, Alexander; González Arbesú, José María; Collado Gomez, Juan Carlos; Ubeda Farre, Eduardo
    Competitive project
  • Multilevel adaptive cross approximation (MLACA)

     Tamayo Palau, Jose Maria; Heldring, Alexander; Rius Casals, Juan-manuel
    IEEE transactions on antennas and propagation
    Vol. 59, num. 12, p. 4600-4608
    DOI: 10.1109/TAP.2011.2165476
    Date of publication: 2011-12
    Journal article
  • Block LU decomposition versus partitioned matrix inverse for compressed direct solution of method of moments linear system

     Heldring, Alexander; Rius Casals, Juan-manuel
    Iberian Meeting on Computational Electromagnetics
    p. 9-12
    Presentation's date: 2011-11-02
    Presentation of work at congresses
  • Sparsified ACA for accelerated iterative solution of the MoM linear system

     Heldring, Alexander; Rius Casals, Juan-manuel; Ubeda Farre, Eduardo; Tamayo Palau, Jose Maria
    Iberian Meeting on Computational Electromagnetics
    p. 13-15
    Presentation's date: 2011-11-02
    Presentation of work at congresses
    Image
  • Accelerated direct solution of the MoM linear system using block compression and nested factorization

     Heldring, Alexander; Rius Casals, Juan-manuel
    International Conference on Electromagnetics in Advanced Applications
    p. 636-639
    DOI: 10.1109/ICEAA.2011.6046415
    Presentation's date: 2011-09-13
    Presentation of work at congresses
    Image
  • Zeroth-Order Complete Discretizations of Integral-Equation formulations involving conducting or dielectric objects at very low frequencies

     Ubeda Farre, Eduardo; Tamayo Palau, José María; Rius Casals, Juan-manuel; Heldring, Alexander
    IEEE transactions on antennas and propagation
    Vol. 59, num. 7, p. 2735-2741
    DOI: 10.1109/TAP.2011.2152316
    Date of publication: 2011-05-10
    Journal article
  • A recursive acceleration technique for static potential Green's functions of a rectangular cavity combining image and modal series

     Tamayo Palau, Jose Maria; López-Peña, Sergio; Mattes, Michael; Heldring, Alexander; Rius Casals, Juan-manuel; Mosig, Juan Ramón
    IEEE transactions on microwave theory and techniques
    Vol. 59, num. 3, p. 542-551
    DOI: 10.1109/TMTT.2010.2103088
    Date of publication: 2011-03
    Journal article
    Image
  • Multilevel adaptive cross approximation and direct evaluation method for fast and accurate discretization of electromagnetic integral equations  Open access  awarded activity

     Tamayo Palau, José María
    Department of Signal Theory and Communications, Universitat Politècnica de Catalunya
    Theses
  • Multiscale compressed block decomposition for fast direct solution of method of moments linear system

     Heldring, Alexander; Rius Casals, Juan-manuel; Tamayo Palau, Jose Maria; Parrón, Josep; Ubeda Farre, Eduardo
    IEEE transactions on antennas and propagation
    Vol. 59, num. 2, p. 526-536
    DOI: 10.1109/TAP.2010.2096385
    Date of publication: 2011-02
    Journal article
    Image
  • Simulation of shipborne small HF antennas with RWG discretization and fast solver

     Rius Casals, Juan-manuel; Jofre Roca, Luis; Tamayo Palau, Jose Maria; Heldring, Alexander; Ubeda Farre, Eduardo
    IEEE International Conference on Wireless Information Technology and Systems
    DOI: 10.1109/ICWITS.2010.5611892
    Presentation's date: 2010-09-01
    Presentation of work at congresses
    Image
  • Fast direct solution of the combined field integral equation  Open access

     Heldring, Alexander; Tamayo Palau, Jose Maria; Rius Casals, Juan-manuel
    URSI Commission B International Symposium on Electromagnetic Theory
    Presentation's date: 2010-08-17
    Presentation of work at congresses
    Access to the full text
  • Accelerated direct solution of the MoM-VIE for dielectric scatterers  Open access

     Heldring, Alexander; Tamayo Palau, Jose Maria; Rius Casals, Juan-manuel; Ubeda Farre, Eduardo
    Iberian Meeting on Computational Electromagnetics
    p. 25-29
    Presentation's date: 2010-05-19
    Presentation of work at congresses
    Access to the full text
  • Analysis of numerical integration in the evaluation of hyper-singular integrals in Galerkin surface integral equation formulations via the direct evaluation method

     Tamayo Palau, Jose Maria; Polimeridis, Athanasios G.; Rius Casals, Juan-manuel; Heldring, Alexander; Mosig, Juan Ramón
    European Conference on Antennas and Propagation
    p. 1-5
    Presentation's date: 2010-04-16
    Presentation of work at congresses
  • Direct MoM solution of electrically large problems with N2 complexity

     Heldring, Alexander; Rius Casals, Juan-manuel; Tamayo Palau, Jose Maria
    European Conference on Antennas and Propagation
    Presentation's date: 2010-04-15
    Presentation of work at congresses
  • Software framework for integration of method of moments kernels with direct or iterative fast solvers

     Rius Casals, Juan-manuel; Herrero, J. A.; Tamayo Palau, Jose Maria; Heldring, Alexander; Ubeda Farre, Eduardo; Parrón, Josep; López-Peña, Sergio; Polimeridis, Athanasios G.; Mosig, Juan Ramón; Espinosa, Hugo; Boag, Amir
    European Conference on Antennas and Propagation
    p. 1-2
    Presentation's date: 2010-04-15
    Presentation of work at congresses
  • Comments on "Fast direct solution of method of moments linear system"

     Heldring, Alexander; Rius Casals, Juan-manuel; Tamayo Palau, Jose Maria
    IEEE transactions on antennas and propagation
    Vol. 58, num. 3, p. 1015-1016
    DOI: 10.1109/TAP.2009.2039330
    Date of publication: 2010-03
    Journal article
  • TECNOLOGIA Y NUEVAS TECNICAS DE DISEÑO PARA INTEGRACION EN CHIP DE CABECERAS DE MICROONDAS

     Mateu Mateu, Jordi; Ubeda Farre, Eduardo; González Arbesú, José María; Heldring, Alexander; Collado Gomez, Juan Carlos
    Competitive project
  • Application of Multilevel Adaptive Cross Approximation (MLACA) to electromagnetic scattering and radiation problems  Open access

     Tamayo Palau, Jose Maria; Heldring, Alexander; Rius Casals, Juan-manuel
    International Conference on Electromagnetics in Advanced Applications
    p. 1-4
    Presentation's date: 2009-09-14
    Presentation of work at congresses
    Access to the full text
  • Framework for integration of fast solvers in method of moments kernels

     Rius Casals, Juan-manuel; Tamayo Palau, Jose Maria; Heldring, Alexander; Parrón, Josep; Ubeda Farre, Eduardo
    LEMA-EPFL Workshop on Integral Techniques for Electromagnetics
    Presentation's date: 2009-09-08
    Presentation of work at congresses
  • On the degrees of freedom in the interaction between sets of elementary scatterers  Open access

     Heldring, Alexander; Tamayo Palau, Jose Maria; Rius Casals, Juan-manuel
    European Conference on Antennas and Propagation
    p. 2413-2416
    Presentation's date: 2009-03
    Presentation of work at congresses
    Access to the full text
  • Compression of the MoM matrix using macrobasis functions with a full-controlable accuracy  Open access

     Tamayo Palau, Jose Maria; Heldring, Alexander; Rius Casals, Juan-manuel
    European Conference on Antennas and Propagation
    Presentation of work at congresses
    Access to the full text
  • Multilevel adaptive cross approximation (MLACA)  Open access

     Tamayo Palau, Jose Maria; Heldring, Alexander; Rius Casals, Juan-manuel
    2012 IEEE International Symposium on Antennas and Propagation
    p. 1-4
    Presentation of work at congresses
    Access to the full text
  • Fast iterative solution of integral equations with method of moments and matrix decomposition algorithm - Singular value decomposition

     Rius Casals, Juan-manuel; Parron, J; Heldring, Alexander; Ubeda Farre, Eduardo; Tamayo Palau, Jose Maria
    IEEE transactions on antennas and propagation
    Vol. 56, num. 8, p. 2314-2324
    DOI: 10.1109/TAP.2008.926762
    Date of publication: 2008-09
    Journal article
  • Compressed block-decomposition algorithm for fast capacitance extraction

     Heldring, Alexander; Rius Casals, Juan-manuel; Parron, J; Tamayo Palau, Jose Maria
    IEEE transactions on computer-aided design of integrated circuits and systems
    Vol. 27, num. 2, p. 265-271
    DOI: 10.1109/TCAD.2007.907236
    Date of publication: 2008-02
    Journal article
  • Polynomial Interpolators of variable order for Method of Moments acceleration with the Multilevel Field Interpolation Algorithm (MLFIA)

     Espinosa, Hugo G; Heldring, Alexander; Tamayo Palau, Jose Maria; Rius Casals, Juan-manuel
    IEEE International Antennas and Propagation Symposium
    Presentation of work at congresses
  • Multiscale CBD for Fast Direct Solution of MoM Linear System

     Heldring, Alexander; Tamayo Palau, Jose Maria; Rius Casals, Juan-manuel; Parrón, J; Ubeda Farre, Eduardo
    IEEE International Antennas and Propagation Symposium
    Presentation of work at congresses
  • Progress in MoM Solution of Electromagnetic Scattering and Radiation at UPC AntennaLab

     Heldring, Alexander; Tamayo Palau, Jose Maria; Ubeda Farre, Eduardo; Rius Casals, Juan-manuel
    VI Encuentro Ibérico de Electromagnetismo Computacional
    Presentation of work at congresses
  • Fast Direct Solution of MoM linear system

     Heldring, Alexander; Tamayo Palau, Jose Maria; Ubeda Farre, Eduardo; Rius Casals, Juan-manuel
    IEEE transactions on antennas and propagation
    Vol. 55, num. 11, p. 3220-3228
    Date of publication: 2007-11
    Journal article
  • The S-Transform and its inverses: Side effects of discretizing and filtering

     Simon, C; Ventosa, S; Schimmel, M; Heldring, Alexander; Danobeitia, J J; Gallart, J; Manuel Lazaro, Antonio
    IEEE transactions on signal processing
    Vol. 55, num. 10, p. 4928-4937
    Date of publication: 2007-10
    Journal article
  • Accurate computation of the impedance elements of the magnetic-field integral equation with RWG basis functions through field-domain and source-domain integral swapping

     Ubeda Farre, Eduardo; Heldring, Alexander; Rius Casals, Juan-manuel
    Microwave and optical technology letters
    Vol. 49, num. 3, p. 709-712
    Date of publication: 2007-03
    Journal article
  • Application of the Multilevel Field Interpolation Algorithm to Large PEC Structures in 2-D

     Espinosa, H G; Heldring, Alexander; Rius Casals, Juan-manuel
    IEEE International Antennas and Propagation Symposium
    Presentation of work at congresses
  • Integration of CBLU Solver in the Finite Array GSM Code

     Rubio Lopez, Javier; Heldring, Alexander; Rius Casals, Juan-manuel; Gonzalez de Aza, Miguel Angel; Zapata Ferrer, Juan
    European Conference on Antennas and Propagation (EuCAP 2007)
    Presentation of work at congresses