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  • Edge diffraction computation using GRECO

     Rius, J.; Carbo, A.; Ubeda, E.; Heldring, A.
    European Conference on Antennas and Propagation
    DOI: 10.1109/EuCAP.2016.7481925
    Presentation's date: 2016-04
    Presentation of work at congresses
  • Efficient analysis of homogeneous dielectric and plasmonic media with integral equation MEI (IE-MEI)

     Rius, J.; Planes, G.; Ubeda, E.; Heldring, A.
    International Conference on Electromagnetics in Advanced Applications
    p. 509-512
    DOI: 10.1109/ICEAA.2015.7297166
    Presentation's date: 2015-09-10
    Presentation of work at congresses
  • Simultaneously improving the efficiency and compression of the adaptive cross approximation algorithm

     Heldring, A.; Ubeda, E.; Rius, J.
    International Conference on Electromagnetics in Advanced Applications
    p. 16-18
    DOI: 10.1109/ICEAA.2015.7297064
    Presentation's date: 2015-09-10
    Presentation of work at congresses
  • Nonconforming discretization of the combined-field integral equation with volumetric testing

     Ubeda, E.; Rius, J.; Heldring, A.
    IEEE International Symposium on Antennas and Propagation
    p. 1156-1157
    DOI: 10.1109/APS.2015.7304966
    Presentation's date: 2015-07-20
    Presentation of work at congresses
  • Testing over the boundary interface for the nonconforming discretization of the Electric-Field Integral Equation

     Ubeda, E.; Sekulic, I.; Rius, J.; Heldring, A.
    IEEE International Symposium on Antennas and Propagation
    p. 1170-1171
    DOI: 10.1109/APS.2015.7304973
    Presentation's date: 2015-07-20
    Presentation of work at congresses
  • Volumetric testing parallel to the boundary surface for a nonconforming discretization of the electric-field integral equation  Open access

     Ubeda, E.; Rius, J.; Heldring, A.; Sekulic, I.
    IEEE transactions on antennas and propagation
    Vol. 63, num. 7, p. 3286-3291
    DOI: 10.1109/TAP.2015.2426793
    Date of publication: 2015-07
    Journal article
    Access to the full text
  • Versatile facet-oriented discretization of the electric-field integral equation

     Ubeda, E.; Sekulic, I.; Rius, J.; Heldring, A.
    Computational Electromagnetics International Workshop
    p. 1-2
    DOI: 10.1109/CEM.2015.7237423
    Presentation's date: 2015-07-01
    Presentation of work at congresses
  • Adapted ACA algorithm with improved efficiency and compression rate  Open access

     Heldring, A.; Ubeda, E.; Rius, J.
    Iberian Meeting on Computational Electromagnetics
    Presentation's date: 2015-05-07
    Presentation of work at congresses
    Access to the full text
  • Integral Equation MEI (IE-MEI) analysis of homogeneus dielectric and plasmonic media in 2D  Open access

     Rius, J.; Planes, G.; Ubeda, E.; Heldring, A.
    Iberian Meeting on Computational Electromagnetics
    Presentation's date: 2015-05-06
    Presentation of work at congresses
    Access to the full text
  • Volumetric testing for the nonconforming discretization of integral equations in scattering problems

     Ubeda, E.; Sekulic, I.; Rius, J.; Heldring, A.
    European Conference on Antennas and Propagation
    p. 1-4
    Presentation's date: 2015-04-13
    Presentation of work at congresses
  • Stochastic estimation of the Frobenius norm in the ACA convergence criterion  Open access

     Heldring, A.; Ubeda, E.; Rius, J.
    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, E.; Rius, J.; Heldring, A.
    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
  • Regularization of the 2D TE-EFIE for homogeneous objects discretized by the Method of Moments with discontinuous basis functions

     Ubeda, E.; Sekulic, I.; Rius, J.; Heldring, A.
    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
  • On the convergence of the ACA algorithm for radiation and scattering problems

     Heldring, A.; Ubeda, E.; Rius, J.
    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
  • Volumetric testing with wedges for a nonconforming discretization of the Electric-Field Integral Equation

     Ubeda, E.; Rius, J.; Heldring, A.
    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
  • Nonconforming discretization of the Magnetic-Field Integral Equation with volumetric testing

     Ubeda, E.; Rius, J.; Heldring, A.
    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
  • New graphical processing technique for fast shadowing computation in PO surface integral

     Rius, J.; Carbo, A.; Bjerkemo, J.; Ubeda, E.; Heldring, A.; Mallorqui, J.J.; Broquetas, A.
    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
  • Grup de Teledetecció, Antenes, Microones i Superconductivitat

     Aguasca, A.; Barlabe, A.; Blanch, S.; Broquetas, A.; Camps, A.; Cardama, A.; Elias, A.; Duffo, N.; Fabregas, F.; Jofre, L.; Heldring, A.; Lopez, C.; Mallorqui, J.J.; O'callaghan, J.; Pradell, L.; Rius, J.; Romeu, J.; Torres, F.; Ubeda, E.; Vall-llossera, M.; Duran, I.; Wu, L.; Gilasgar, M.; Lort, M.; Imbert, M.; Martin, F.; Chaparro, D.; Pablos, M.; Pascual, D.; Park, H.; Alonso-Arroyo, A.; Onrubia, R.; Yam , L.E.; Rodriguez, J.; Piles, M.; Deng, X.; Querol, J.; Corbella, I.
    Competitive project
  • Iterative method of moments solution of problems involving electrically large and concave geometries

     Heldring, A.; Rius, J.; Ubeda, E.
    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
  • Volumetric testing for a nonconforming discretization in method of moments of the electric-field surface integral equation

     Ubeda, E.; Rius, J.; Heldring, A.
    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
  • Discretization of the EFIE in Method of Moments without continuity of the normal current component across edges

     Ubeda, E.; Rius, J.; Heldring, A.
    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, A.; Ubeda, E.; Rius, J.
    Iberian Meeting on Computational Electromagnetics
    Presentation's date: 2013-05-14
    Presentation of work at congresses
  • Fast shadowing computation in physical optics surface

     Rius, J.; Carbo, A.; Ubeda, E.; Heldring, A.
    Iberian Meeting on Computational Electromagnetics
    Presentation's date: 2013-05-14
    Presentation of work at congresses
  • GRECO Code Rejuvenated: hybrid CPU-graphical processing

     Rius, J.; Carbo, A.; Ubeda, E.; Heldring, A.
    European Conference on Antennas and Propagation
    p. 2348-2351
    Presentation's date: 2013-04-10
    Presentation of work at congresses
  • The multiscale compressed block decomposition as a preconditioner for method of moments computations

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

     Ubeda, E.; Tamayo, J.; Rius, J.; Heldring, A.
    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
  • Accelerated direct solution of the method-of-moments linear system

     Heldring, A.; Tamayo, J.; Ubeda, E.; Rius, J.
    Proceedings of the IEEE
    Vol. 101, num. 2, p. 364-371
    DOI: 10.1109/JPROC.2012.2193369
    Date of publication: 2013-02
    Journal article
  • Dispositivos pasivos avanzados para cabezales multibanda, multimodo

     Rocas, E.; Mateu, J.; Heldring, A.; Gonzalez, J.; Collado, J.; Ubeda, E.
    Competitive project
  • Sparsified adaptive cross approximation algorithm for accelerated method of moments computations

     Heldring, A.; Tamayo, J.; Simon, C.; Ubeda, E.; Rius, J.
    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
  • Multilevel adaptive cross approximation (MLACA)

     Tamayo, J.M.; Heldring, A.; Rius, J.
    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, A.; Rius, J.
    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, A.; Rius, J.; Ubeda, E.; Tamayo, J.M.
    Iberian Meeting on Computational Electromagnetics
    p. 13-15
    Presentation's date: 2011-11-02
    Presentation of work at congresses
  • Accelerated direct solution of the MoM linear system using block compression and nested factorization

     Heldring, A.; Rius, J.
    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
  • Zeroth-Order Complete Discretizations of Integral-Equation formulations involving conducting or dielectric objects at very low frequencies

     Ubeda, E.; Tamayo, J.; Rius, J.; Heldring, A.
    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, J.M.; López-Peña, S.; Mattes, M.; Heldring, A.; Rius, J.; Mosig, J. R.
    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
  • Multilevel adaptive cross approximation and direct evaluation method for fast and accurate discretization of electromagnetic integral equations  Open access  awarded activity

    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, A.; Rius, J.; Tamayo, J.M.; Parrón, J.; Ubeda, E.
    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
  • Simulation of shipborne small HF antennas with RWG discretization and fast solver

     Rius, J.; Jofre, L.; Tamayo, J.M.; Heldring, A.; Ubeda, E.
    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
  • Fast direct solution of the combined field integral equation  Open access

     Heldring, A.; Tamayo, J.M.; Rius, J.
    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, A.; Tamayo, J.M.; Rius, J.; Ubeda, E.
    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, J.M.; Polimeridis, A. G.; Rius, J.; Heldring, A.; Mosig, J. R.
    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, A.; Rius, J.; Tamayo, J.M.
    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, J.; Herrero, J. A.; Tamayo, J.M.; Heldring, A.; Ubeda, E.; Parrón, J.; López-Peña, S.; Polimeridis, A. G.; Mosig, J. R.; Espinosa, H.; Boag, A.
    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, A.; Rius, J.; Tamayo, J.M.
    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, J.; Ubeda, E.; Gonzalez, J.; Heldring, A.; Collado, J.
    Competitive project
  • Application of Multilevel Adaptive Cross Approximation (MLACA) to electromagnetic scattering and radiation problems  Open access

     Tamayo, J.M.; Heldring, A.; Rius, J.
    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, J.; Tamayo, J.M.; Heldring, A.; Parrón, J.; Ubeda, E.
    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, A.; Tamayo, J.M.; Rius, J.
    European Conference on Antennas and Propagation
    p. 2413-2416
    Presentation's date: 2009-03
    Presentation of work at congresses
    Access to the full text
  • Multilevel adaptive cross approximation (MLACA)  Open access

     Tamayo, J.M.; Heldring, A.; Rius, J.
    2012 IEEE International Symposium on Antennas and Propagation
    p. 1-4
    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, J.M.; Heldring, A.; Rius, J.
    European Conference on Antennas and Propagation
    Presentation of work at congresses
    Access to the full text