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Visualitzant Articles (Departament de Tecnologies de la Informació i les Comunicacions) per títol

Visualitzant Articles (Departament de Tecnologies de la Informació i les Comunicacions) per títol

Ordena per: Ordre: Resultats:

  • Cramer, Ronald; Daza, Vanesa; Gracia, Ignacio; Jiménez Urroz, Jorge; Leander, Gregor; Martí, Jaume, 1943-; Padró, Carles (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Error-correcting codes and matroids have been widely used in the study of ordinary secret sharing schemes. In this paper, the connections between codes, matroids, and a special class of secret sharing schemes, namely, ...
  • Batard, Thomas; Bertalmío, Marcelo (SIAM (Society for Industrial and Applied Mathematics), 2014)
    We present a generalization of the Euclidean and Riemannian gradient operators to a vector bundle, a geometric structure generalizing the concept of manifold. One of the key ideas is to replace the standard differentiation ...
  • Biglieri, Ezio; Hong, Yi; Viterbo, Emanuele (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    We focus on full-rate, fast-decodable space–time block codes (STBCs) for 2 x 2 and 4 x 2 multiple-input multiple-output (MIMO) transmission. We first derive conditions and design criteria for reduced-complexity maximum-likelihood ...
  • Sezginer, Serdar; Sari, Hikmet; Biglieri, Ezio (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    The 2×2 MIMO profiles included in Mobile WiMAX specifications are Alamouti’s space-time code (STC) fortransmit diversity and spatial multiplexing (SM). The former has/nfull diversity and the latter has full rate, but neither ...
  • Daza, Vanesa; Herranz, Javier; Sáez, Germán (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    In a distributed key distribution scheme, a set of servers helps a set of users in a group to securely obtain a common key. Security means that an adversary who corrupts some servers and some users has no information about ...
  • El Ayach, Omar; Lozano Solsona, Angel; Heath, R. W., Jr. (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Interference alignment (IA) is a cooperative transmission strategy that, under some conditions,/nachieves the interference channel’s maximum number of degrees of freedom. Realizing IA gains,/nhowever, is contingent upon ...
  • Runnqvist, Elin; Strijkers, Kristof; Sadat Schaffai, Jasmin, 1982-; Costa, Albert (Frontiers Media, 2011)
    Despite a large amount of psycholinguistic research devoted to the issue of processing differences between a first and a second language, there is no consensus regarding the locus where these emerge or the mechanism behind ...
  • Deco, Gustavo; Jirsa, Viktor K. (Society for Neuroscience, 2012)
    The ongoing activity of the brain at rest, i.e., under no stimulation and in absence of any task, is astonishingly highly structured into/nspatiotemporal patterns. These spatiotemporal patterns, called resting state networks, ...
  • Lozano Solsona, Angel; Tulino, Antonia M.; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    This paper formulates power allocation policies that maximize the region of mutual informations/nachievable in multiuser downlink OFDM channels. Arbitrary partitioning of/nthe available tones among users and arbitrary ...
  • Lozano Solsona, Angel; Tulino, Antonia M.; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2006)
    The mutual information of independent parallel Gaussian-noise channels is maximized, under an average power constraint, by independent Gaussian inputs whose power is allocated according to the waterfilling policy. In ...
  • Jin, Yu; Díaz, Begoña; Colomer, Marc; Sebastián Gallés, Núria (Public Library of Science, 2014)
    Individual differences in second language (L2) phoneme perception (within the normal population) have been related to/nspeech perception abilities, also observed in the native language, in studies assessing the ...
  • Masquelier, Timothée; Hugues, Etienne; Deco, Gustavo; Thorpe, Simon J. (Society for Neuroscience, 2009)
    Recent experiments have established that information can be encoded in the spike times of neurons relative to the phase of a background oscillation in the local field potential—a phenomenon referred to as “phase-of-firing ...
  • Morales-Jiménez, David; Paris, José F.; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Exact closed-form expressions are obtained for the outage probability of maximal ratio combining in η-μ fading/nchannels with antenna correlation and co-channel interference. The scenario considered in this work assumes ...
  • Mungara, Ratheesh K.; George, Geordie; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    The spectral efficiency achievable by IA (interfer-/nence alignment) in a/nK/n-user MIMO (multiple-input multiple-/noutput) interference channel is studied in the face of time-/nselective ...
  • Geers, Arjan; Larrabide, Ignacio, 1978-; Radaelli, Alessandro Guido; Bogunovic, Hrvoje; Kim, Minsuok; Gratama van Andel, Hugo A. F.; Majoie, Charles B. L. M.; VanBavel, E; Frangi Caregnato, Alejandro (American Society of Neuroradiology, 2011)
    Patient-specific simulations of the hemodynamics in intracranial aneurysms can be constructed by using image-based vascular models and CFD techniques. This work evaluates the impact of the choice of imaging technique on ...
  • Bijnens, Bart; García Cañadilla, Patricia, 1985-; Crispi Brillas, Fàtima; Cruz-Lemini, Mónica; Triunfo, Stefania; Nadal, Alfons; Valenzuela Alcaraz, Brenda; Rudenick, Paula A.; Gratacós Solsona, Eduard (Elsevier, 2015)
    Introduction: Intrauterine growth restriction (IUGR) due to placental insufficiency is associated with blood-flow redistribution in order to maintain perfusion to the brain. However, some hemodynamic parameters that might ...
  • Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    In a MIMO layered architecture, several codewords/nare transmitted from a multiplicity of antennas. Although the/nspectral efficiency is maximized if the rates of these codewords/nare separately controlled, the feedback ...
  • Friston, Karl; Breakspear, Michael; Deco, Gustavo (Frontiers Media, 2012)
    This paper considers state-dependent dynamics that mediate perception in the brain. In particular, it considers the formal basis of self-organized instabilities that enable perceptual transitions during Bayes-optimal ...
  • Overvliet, Krista E.; Karana, Elvin; Soto-Faraco, Salvador, 1970- (Elsevier, 2016)
    In many daily contexts, we prefer natural ‘materials’ over un-natural ones. Textiles embodied in garments that are worn on the body all day, or in bed sheets slept under every night touch us literally, on a daily basis. ...
  • Vazquez-Corral, Javier; Connah, David; Bertalmío, Marcelo (MDPI, 2014)
    Color camera characterization, mapping outputs from the camera sensors to an/nindependent color space, such as XY Z, is an important step in the camera processing/npipeline. Until now, this procedure has been primarily ...