Benvinguts al Repositori Digital de la UPF

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

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

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  • Tulino, Antonia M.; Lozano Solsona, Angel; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2005)
    This paper applies random matrix theory to obtain analytical characterizations of the capacity of correlated multiantenna channels. The analysis is not restricted to the popular separable correlation model, but rather it ...
  • 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 ...
  • Lozano Solsona, Angel; Tulino, Antonia M.; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2006)
    The analysis of the multiantenna capacity in the high-SNR regime has hitherto focused on the high-SNR slope (or maximum multiplexing gain), which quantifies the multiplicative /nincrease as function of the number of antennas. ...
  • Tulino, Antonia M.; Lozano Solsona, Angel; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2006)
    We characterize the capacity-achieving input covariance for multi-antenna channels known instantaneously at the receiver and in distribution at the transmitter. Our characterization, valid for arbitrary numbers of antennas, ...
  • Parés, Narcís, 1966-; Parés, Roc, 1968- (MIT Press, 2006)
    After analyzing how VR experiences are modeled within human computer interaction (CHI) we have found there is a deep theoretical gap. Similarly to how the scientific community has defined CHI models for multimedia applications, ...
  • Gouyon, Fabien; Widmer, Gerhard; Serra, Xavier; Flexer, Arthur (University of California Press, 2006)
    This article brings forward the question of which acoustic features are the most adequate for identifying beats computationally in acoustic music pieces. We consider many different features computed on consecutive short ...
  • Jorrín-Abellán, Iván M.; Ruiz-Requies, Inés; Hernández Leo, Davinia; Villasclaras-Fernández, Eloy D.; Dimitriadis, Yannis; Rubia-Avi, Bartolomé; Asensio-Pérez, Juan I. (International Forum of Educational Technology & Society, 2006)
    This paper introduces Collage, a high-level IMS-LD compliant authoring tool that is specialized for CSCL (Computer-Supported Collaborative Learning). Nowadays CSCL is a key trend in elearning since it highlights the ...
  • Parés, Narcís, 1966-; Carreras, Anna; Durany, Jaume; Ferrer, Jaume; Freixa Font, Pere; Gómez, David; Kruglanski, O.; Parés, Roc, 1968-; Ribas, Joan Ignasi; Soler, M.; Sanjurjo, A. (Mary Ann Liebert, Inc, 2006)
    On starting to think about interaction design for low-functioning persons in the autistic spectrum (PAS), especially children, one finds a number of questions that are difficult to answer: Can we typify the PAS user? Can ...
  • Ramírez, Rafael,1966-; Maestre Gómez, Esteban; Pertusa, Antonio; Gómez Gutiérrez, Emilia, 1975-; Serra, Xavier (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    We propose a novel approach to the task of identifying performers from their playing styles. We investigate how skilled musicians (Jazz saxophone players in particular) express and communicate their view of the musical and ...
  • Igual, Laura; Preciozzi, Javier; Garrido, Luís; Almansa, Andrés; Caselles, Vicente; Rougé, Bernard (AIMS American Institute of Mathematical Sciences, 2007)
    In this work we propose a new automatic methodology for computing accurate digital elevation models (DEMs) in urban environments from low baseline stereo pairs that shall be available in the future from a new kind of earth ...
  • Ballester, Coloma; Bertalmío, Marcelo; Caselles, Vicente; Garrido Ostermann, Luis; Marques, Adrián; Ranchin, Florent (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    Video is usually acquired in interlaced format, where each image frame is composed of two image fields, each field/nholding same parity lines. However, many display devices require progressive video as input; also, many ...
  • Hernández Leo, Davinia; Bote-Lorenzo, Miguel L.; Asensio-Pérez, Juan I.; Gómez-Sánchez, Eduardo; Villasclaras-Fernández, Eloy D.; Jorrín-Abellán, Iván M.; Dimitriadis, Yannis (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    This paper describes a Computer-Supported Collaborative Learning (CSCL) case study in engineering education carried out within the context of a network management course. The case study shows that the use of two computing ...
  • Deco, Gustavo; Scarano, Leandro; Soto-Faraco, Salvador, 1970- (Society for Neuroscience, 2007)
    Recent single-cell studies in monkeys (Romo et al., 2004) show that the activity of neurons in the ventral premotor cortex covaries with the animal's decisions in a perceptual comparison task regarding the frequency of ...
  • Serra, Xavier; Bonada, Jordi, 1973- (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    This paper introduces the concept of synthesis based on performance sampling. It explains that although sampling has been considered a way to capture and reproduce the sound of an instrument, it should be better considered ...
  • Serra, Xavier; Bresin, Roberto; Camurri, Antonio (Taylor & Francis (Routledge), 2007)
    Based on the current context of the Sound and Music Computing (SMC) field, the state of the art in research and the open issues that have been identified and described in other articles of this journal issue, in this article ...
  • Pérez Sanagustín, Maria del Mar; Hernández Leo, Davinia; Santos Rodríguez, Patrícia; Sayago Barrantes, Sergio; Blat, Josep; Griffiths, Dai (International Association of Online Engineering (IAOE), 2008)
    Dialogic learning and interactive groups have proved to be a useful methodological approach applied/nin educational situations for lifelong adult learners. The principles of this approach stress the/nimportance of dialogue ...
  • Lozano Solsona, Angel (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Expressions relating spectral efficiency, power, and Doppler spectrum, are derived for Rayleigh-faded wireless channels with Gaussian signal transmission. No side information on the state of the channel is assumed at the ...
  • 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 ...
  • Girardin, Fabien; Dal Fiore, Filippo; Ratti, Carlo; Blat, Josep (Taylor & Francis (Routledge), 2008)
    In recent years, the large deployment of mobile devices has led to a massive/nincrease in the volume of records of where people have been and when they were there./nThe analysis of these spatio-temporal data can supply ...
  • 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 ...