Articles (Departament de Tecnologies de la Informació i les Comunicacions): Recent submissions

  • Attarifar, Masoud; Abbasfar, Aliazam; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    We present a modification of conjugate beamforming for the forward link of cell-free massive MIMO networks. This modification eliminates the self-interference and yields a performance that, without forward pilots, closely ...
  • George, Geordie; Lozano Solsona, Angel; Haenggi, Martin (Institute of Electrical and Electronics Engineers (IEEE), 2019)
    We consider the number of users associating with each base station in a cellular network. Extending and unifying the characterizations for certain settings available in the literature, we derive a result that is asymptotic ...
  • Giraldo, Sergio; Ramírez, Rafael,1966- (Frontiers, 2016)
    Expert musicians introduce expression in their performances by manipulating sound properties such as timing, energy, pitch, and timbre. Here, we present a data driven computational approach to induce expressive performance ...
  • Fedorov, Vadim; Ballester, Coloma (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    This work presents an extension of the Non-Local Means denoising method, that effectively exploits the affine invariant self-similarities present in images of real scenes. Our method provides a better image denoising ...
  • Gigante, Guido; Deco, Gustavo; Marom, Shimon; Del Giudice, Paolo (Public Library of Science (PLoS), 2015)
    Cortical networks, in-vitro as well as in-vivo, can spontaneously generate a variety of collective dynamical events such as network spikes, UP and DOWN states, global oscillations, and avalanches. Though each of them has ...
  • Jobst, Beatrice M.; Hindriks, Rikkert; Laufs, Helmut; Tagliazucchi, Enzo; Hahn, Gerald; Ponce-Alvarez, Adrián; Stevner, Angus B. A.; Kringelbach, Morten L.; Deco, Gustavo (Nature Research, 2017)
    Recent research has found that the human sleep cycle is characterised by changes in spatiotemporal patterns of brain activity. Yet, we are still missing a mechanistic explanation of the local neuronal dynamics underlying ...
  • Saenger Amoore, Victor Manuel; Kahan, Joshua; Foltynie, Tom; Friston, Karl; Aziz, Tipu Z.; Green, Alex L.; Van Hartevelt, Tim J.; Cabral, Joana R. B.; Stevner, Angus B. A.; Fernandes, Henrique M.; Mancini, Laura; Thornton, John; Yousry, Tarek; Limousin, Patricia; Zrinzo, Ludvic; Hariz, Marwan; Marques, Paulo; Sousa, Nuno; Kringelbach, Morten L.; Deco, Gustavo (Nature Research, 2017)
    Deep brain stimulation (DBS) for Parkinson’s disease is a highly effective treatment in controlling otherwise debilitating symptoms. Yet the underlying brain mechanisms are currently not well understood. Whole-brain ...
  • Gamonal, Ferran P.; Ballester, Coloma; Haro Ortega, Gloria; Meinhardt-Llopis, Enric; Palomares, Roberto P. (Editor Image Processing On Line, 2019)
    We present a detailed analysis of FALDOI, a large displacement optical flow method proposed by P. Palomares et al. This method requires a set of discrete matches, which can be extremely sparse, and an energy functional ...
  • Fedorov, Vadim; Ballester, Coloma (Image Processing On Line, 2018)
    Image and video comparison is often approached by comparing patches of visual information. In this work we present a detailed description and implementation of an affine invariant patch simi- larity measure that performs ...
  • Vitoria, Patricia; Ballester, Coloma (Springer, 2018)
    Flare spot is one type of are artifact caused by a number of conditions, frequently provoked by one or more high-luminance sources within or close to the camera field of view. When light rays coming from a high-luminance ...
  • Nogueira, Ramon; Abolafia, Juan M.; Drugowitsch, Jan; Balaguer-Ballester, Emili; Sanchez-Vives, Maria V.; Moreno Bote, Rubén (Nature Research, 2017)
    Adaptive behavior requires integrating prior with current information to anticipate upcoming events. Brain structures related to this computation should bring relevant signals from the recent past into the present. Here ...
  • Schirner, Michael; Randal McIntosh, Anthony; Jirsa, Viktor K.; Deco, Gustavo; Ritter, Petra (eLife, 2018)
    The neurophysiological processes underlying non-invasive brain activity measurements are incompletely understood. Here, we developed a connectome-based brain network model that integrates individual structural and functional ...
  • Atasoy, Selen; Roseman, Leor; Kaelen, Mendel; Kringelbach, Morten L.; Deco, Gustavo; Carhart-Harris, Robin L. (Nature Research, 2017)
    Recent studies have started to elucidate the effects of lysergic acid diethylamide (LSD) on the human brain but the underlying dynamics are not yet fully understood. Here we used ’connectome-harmonic decomposition’, a novel ...
  • Hahn, Gerald; Ponce-Alvarez, Adrián; Monier, Cyril; Benvenuti, Giacomo; Kumar, Arvind; Chavane, Frédéric; Deco, Gustavo; Frégnac, Yves (Public Library of Science (PLoS), 2017)
    Brain activity displays a large repertoire of dynamics across the sleep-wake cycle and even during anesthesia. It was suggested that criticality could serve as a unifying principle underlying the diversity of dynamics. ...
  • Runnqvist, Elin; Strijkers, Kristof; Costa, Albert, 1970- (Public Library of Science (PLoS), 2019)
    We tested whether learning associated to lexical selection is error-based, and whether lexical selection is competitive by assessing the after-effects of producing words on subsequent production of semantic competitors ...
  • Wu, Yongpeng; Wing Kwan Ng, Derrick; Wen, Chao-Kai; Schober, Robert; Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    This paper investigates the design of precoders for single-user multiple-input multiple-output (MIMO) channels, and, in particular, for finite-alphabet signals. Based on an asymptotic expression for the mutual information ...
  • Toro Soto, Juan Manuel, 1976-; Shukla, Mohinish; Nespor, Marina; Endress, Ansgar D. (Springer, 2008)
    Consonants and vowels may play different roles during language processing, consonants being preferentially involved in lexical processing, and vowels tending to mark syntactic constituency through prosodic cues. In support ...
  • Deco, Gustavo; Martí, Daniel; Ledberg, Anders; Reig, Ramon; Sanchez Vives, Maria V. (Public Library of Science (PLoS), 2009)
    We introduce in this paper a new method for reducing neurodynamical data to an effective diffusion equation, either experimentally or using simulations of biophysically detailed models. The dimensionality of the data is ...
  • Aguado, Ainhoa M.; Olivares, Andy L.; Yagüe, Carlos; Silva, Etelvino; Nuñez-García, Marta; Fernandez-Quilez, Álvaro; Mill, Jordi; Genua, Ibai; Arzamendi, Dabit; De Potter, Tom; Freixa, Xavier; Camara, Oscar (Frontiers, 2019)
    According to clinical studies, around one third of patients with atrial fibrillation (AF) will suffer a stroke during their lifetime. Between 70 and 90% of these strokes are caused by thrombus formed in the left atrial ...
  • Ivanova, Iva; Branigan, Holly P.; McLean, Janet F.; Costa, Albert, 1970-; Pickering, Martin J. (Taylor & Francis, 2017)
    We frequently experience and successfully process anomalous utterances. Here we examine whether people do this by “correcting” syntactic anomalies to yield well-formed representations. In two structural priming experiments, ...

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