Recent Submissions

  • Video object linguistic grounding 

    Herrera-Palacio, Alba; Ventura, Carles; Giró Nieto, Xavier (Association for Computing Machinery (ACM), 2019)
    Conference lecture
    Restricted access - publisher's policy
    The goal of this work is segmenting on a video sequence the objects which are mentioned in a linguistic description of the scene. We have adapted an existing deep neural network that achieves state of the art performance ...
  • Channel-aware energy allocation for throughput maximization in massive low-rate multiple access 

    Molina Oliveras, Francesc; Sala Álvarez, José; Rey Micolau, Francesc; Villares Piera, Nemesio Javier (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference report
    Restricted access - publisher's policy
    A multiple access (MA) optimization technique for massive low-rate direct-sequence spread spectrum communications is analyzed in this work. A dense network of users transmitting at the same rate to a common central node ...
  • SMF-POLOPT: an adaptive multitemporal pol(DIn)SAR filtering and phase optimization algorithm for PSI applications 

    Zhao, Feng; Mallorquí Franquet, Jordi Joan (Institute of Electrical and Electronics Engineers (IEEE), 2019-09-01)
    Article
    Open Access
    Speckle noise and decorrelation can hamper the application and interpretation of PolSAR images. In this paper, a new adaptive multitemporal Pol(DIn)SAR filtering and phase optimization algorithm is proposed to address these ...
  • Knotting fractional-order knots with the polarization state of light 

    Pisanty, Emilio; Jiménez Machado, Gerard; Vicuña Hernández, Verónica; Picón, Antonio; Celi, Alessio; Pérez Torres, Juan; Lewenstein, Maciej (2019-08-01)
    Article
    Restricted access - publisher's policy
    The fundamental polarization singularities of monochromatic light are normally associated with invariance under coordinated rotations: symmetry operations that rotate the spatial dependence of an electromagnetic field by ...
  • Decentralized random energy allocation for massive non-orthogonal code-division multiple access 

    Molina Oliveras, Francesc; Villares Piera, Nemesio Javier; Rey Micolau, Francesc; Sala Álvarez, José (2019-10-07)
    Article
    Open Access
    This work studies the spectral efficiency achievable when a very large number of terminals are connected simultaneously to a central node (uplink) through independent and identically-distributed flat-fading channels. ...
  • Average PER performance metrics of iterative successive interference cancellation 

    Molina Oliveras, Francesc; Sala Álvarez, José (2019-09-16)
    Article
    Open Access
    The average packet error rate (PER) and user-PER profiles of iterative successive interference cancellation (I-SIC) are analyzed for a proof-of-concept scenario where asymptotically many code-division-multiple-access users ...
  • A proof of de Bruijn identity based on generalized Price’s theorem 

    Riba Sagarra, Jaume; Cabrera Estanyol, Ferran de (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    Conference lecture
    Restricted access - publisher's policy
    This paper shows that de Bruijn identity, which relates entropy with Fisher information, can be obtained as a particular case of an immediate generalization of Price’s theorem, which is a tool used in the analysis of ...
  • Multi-satellite cycle-slip detection and exclusion using the noise subspace of residual dynamics 

    Riba Sagarra, Jaume; Cabrera Estanyol, Ferran de; Juan Zornoza, José Miguel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    Real-time detection of cycle-slips on undifferenced carrier-phase measurements is an important task to properly exclude wrong phase trackers from precise positioning algorithms. The detection is especially challenging in ...
  • Progress toward characterization of the atmospheric boundary layer over northern Alabama using observations by a vertically pointing, S-band profiling radar during VORTEX-Southeast 

    Tanamachi, Robin; Frasier, Steve; Waldinger, Joseph; LaFleur, Allison T.; Turner, David Dave; Rocadenbosch Burillo, Francisco (American Meteorological Society, 2019-09-09)
    Article
    Open Access
    During spring 2016 and spring 2017, a vertically pointing, S-band FMCW radar (UMass FMCW) was deployed in northern Alabama under the auspices of the Verification of the Origins of Rotation in Tornadoes Experiment (VORTEX) ...
  • Multi-view 3D face reconstruction in the wild using siamese networks 

    Ramon, Eduard; Escur, Janna; Giró Nieto, Xavier (Computer Vision Foundation, 2019)
    Conference report
    Open Access
    In this work, we present a novel learning based approach to reconstruct 3D faces from a single or multiple images. Our method uses a simple yet powerful architecture based on siamese neural networks that helps to extract ...
  • Coated conductor technology for the beamscreen chamber of future high energy circular colliders 

    Puig Molina, Teresa; Krkotic, Patrick; Romanov, Artur; O'Callaghan Castellà, Juan Manuel; Gutiérrez Royo, Joffre (2019-09-01)
    Article
    Restricted access - publisher's policy
    The surface resistance of state-of-the-art REBa2Cu3O7-x coated conductors has been measured at 8 GHz versus temperature and magnetic field. We show that the surface resistance of REBa2Cu3O7-x strongly depends on the ...
  • A universal specification for multicore fiber crosstalk 

    Gené Bernaus, Joan M.; Winzer, Peter J. (2019-05-01)
    Article
    Open Access
    In order to transition multi-core fiber (MCF) technologies from their research state to volume production, the key design specifications have to be broadly agreed upon, first and foremost an acceptable level of inter-core ...

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