Benvinguts al Repositori Digital de la UPF

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 ...
  • Costa, Albert, 1970-; Vives, Marc-Lluís; Corey, Joanna Darrow, 1986- (SAGE Publications, 2017)
    Recent research has revealed that people’s preferences, choices, and judgments are affected by whether information is presented in a foreign or a native language. Here, we review this evidence, focusing on various ...
  • 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 ...
  • Timmer, Kalinka; Calabria, Marco; Branzi, Francesca Martina, 1984-; Baus, Cristina; Costa, Albert, 1970- (Frontiers, 2018)
    Bilingual speakers are suggested to use control processes to avoid linguistic interference from the unintended language. It is debated whether these bilingual language control (BLC) processes are an instantiation of the ...
  • Runnqvist, Elin; Strijkers, Kristof; Sadat Schaffai, Jasmin, 1982-; Costa, Albert, 1970- (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 ...
  • Baus, Cristina; Costa, Albert, 1970- (Elsevier, 2015)
    This study investigates the temporal dynamics of sign production and how particular aspects of the signed modality influence the early stages of lexical access. To that end, we explored the electrophysiological correlates ...
  • 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, ...
  • Marques, Ricardo; Bouville, Christian; Bouatouch, Kadi (Wiley, 2018)
    This paper proposes optimal quadrature rules over the hemisphere for the shading integral. We leverage recent work regarding the theory of quadrature rules over the sphere in order to derive a new theoretical framework ...
  • 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 ...
  • Schaper, Marie-Monique; Santos, Maria; Parés, Narcís, 1966- (Elsevier, 2018)
    The roles that children are allowed to play in the co-design of an interactive experience are strongly influenced and determined by the views of designers and other adult stakeholders on childhood, as well as by their ...
  • 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 ...
  • Corey, Joanna Darrow, 1986-; Hayakawa, Sayuri; Foucart, Alice; Aparici Aznar, Melina; Botella, Juan; Costa, Albert, 1970-; Keysar, Boaz (American Psychological Association (APA), 2017)
    Though moral intuitions and choices seem fundamental to our core being, there is surprising new evidence that people resolve moral dilemmas differently when they consider them in a foreign language (Cipolletti et al., 2016; ...
  • 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 ...
  • Farrús, Mireia; Costa-jussà, Marta R.; Mariño Acebal, José B.; Poch, Marc; Hernández, Adolfo; Henríquez, Carlos; Fonollosa, José A Rodriguez (Springer, 2011)
    This work aims to improve an N-gram-based statistical machine translation system between the Catalan and Spanish languages, trained with an aligned Spanish-Catalan parallel corpus consisting of 1.7 million sentences taken ...