Now showing items 21-40 of 353

    • A robust maximin approach for MIMO communications with imperfect channel state information based on convex optimization 

      Pascual Iserte, Antonio; Pérez Palomar, Daniel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (2006-01)
      Article
      Open Access
      This paper considers a wireless communication system with multiple transmit and receive antennas, i.e., a multiple-input-multiple-output (MIMO) channel. The objective is to design the transmitter according to an imperfect ...
    • A self-organized spectrum assignment strategy in next generation OFDMA networks providing secondary spectrum access 

      Bernardo Álvarez, Francisco; Agustí Comes, Ramon; Pérez Romero, Jordi; Sallent Roig, Oriol (2009)
      Conference report
      Open Access
      This paper proposes a Self-organized Spectrum Assignment strategy in the context of next generation multicell Orthogonal Frequency Division Multiple Access networks. The proposed strategy is able to dynamically find ...
    • A signal subspace framewok of nonlinearly constrained solutions 

      Konyk Jr., Stephen; Amin, Moeness G.; Lagunas Hernandez, Miguel A. (Elsevier, 1990)
      Conference report
      Open Access
    • A Small Baseline DIFSAR Approach for Investigating Deformations on Full Resolution SAR Interferograms 

      Lanari, Ricardo; Mora Sacristan, Óscar; Manunta, Michele; Mallorquí Franquet, Jordi Joan; Berardino, P.; Sansoti, Eugenio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-07-31)
      Article
      Open Access
      This paper presents a differential synthetic aperture radar (SAR) interferometry (DIFSAR) approach for investigating deformation phenomena on full-resolution DIFSAR interferograms. In particular, our algorithm extends ...
    • A taxonomy and survey of SCTP research 

      Budzisz, Lukasz; Garcia, Johan; Brunstrom, Anna; Ferrús Ferré, Ramón Antonio (2012-08)
      Article
      Restricted access - publisher's policy
      The Stream Control Transmission Protocol (SCTP) is a relatively recent general-purpose transport layer protocol for IP networks that has been introduced as a complement to the well-established TCP and UDP transport protocols. ...
    • Active microwave computed brain tomography: The response to a challenge 

      Broquetas Ibars, Antoni; Jofre Roca, Lluís (1991-02)
      Article
      Restricted access - publisher's policy
      The potential application of active microwave techniques to brain imaging is studied by numerical simulations and experimentally using a recently developed cylindrical microwave scanner. The potential advantages and ...
    • Adaptació de la plataforma dinamomètrica per l'anàlisi de la sortida de tacs en l'atletisme 

      Pellitero Cornet, Laura (Universitat Politècnica de Catalunya, 2016-06-08)
      Bachelor thesis
      Open Access
      Aquest projecte comença amb la voluntat pròpia de que estigués relacionat amb l’esport. Per poder-ho realitzar millor és va fer amb simultaneïtat les pràctiques i el projecte en el Centre d’Alt Rendiment (CAR) de Sant ...
    • Aerosol lidar intercomparison in the framework of SPALINET-The Spanish lidar network: methodology and results 

      Rocadenbosch Burillo, Francisco; Sicard, Michaël; Molero, Francisco; Guerrero Rascado, Juan Luis; Pedrós, Roberto; Expósito, Francisco Javier; Córdoba Jabonero, Carmen; Bolarín, Jose Miguel; Comerón Tejero, Adolfo; Moreno, José Maria; Navas Guzmán, Francisco; Requena, Alberto; Gil, Manuel; Pedro Díaz, Juan; Martínez Lozano, José Antonio; Alados Arboledas, Lucas; Pujades, Manuel (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-10)
      Article
      Open Access
      Abstract—A group of eight Spanish lidars was formed in order to extend the European Aerosol Research Lidar Network–Advanced Sustainable Observation System (EARLINET-ASOS)project. This study presents intercomparisons at the ...
    • Aerosol stratification characterization of an astronomical site by means of a backscatter lidar at the Roque de los Muchachos Observatory 

      Jiménez Fuensalida, Jesús; Muñoz Tuñón, Casiana; Sicard, Michaël; Tomás Martínez, Sergio; Md. Reba, Mohd Nadzri; Comerón Tejero, Adolfo; Batet Torrell, Óscar; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco (2009)
      Conference report
      Open Access
      The Roque de los Muchachos Observatory, located on the island of La Palma in the Canary Islands, is home of many astronomical facilities. In the context of the Extremely Large Telescope Design Study, an intensive lidar ...
    • Albayzin 2010 Evaluation campaign: speaker diarization 

      Zelenak, Martin; Schulz, Henrik; Hernando Pericás, Francisco Javier (2010)
      Conference lecture
      Open Access
      In this paper we present the evaluation results for the task of speaker diarization in broadcast news domain as part of the Albayzin 2010 evaluation campaign of language and speech technologies. The evaluation data was ...
    • An adaptive design of an all-zero spectral estimator 

      Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo (Institute of Electrical and Electronics Engineers (IEEE), 1981)
      Conference report
      Open Access
    • An analytical model for GMPLS control plane resilience quantification 

      Ruiz, M; Perelló Muntan, Jordi; Velasco Esteban, Luis Domingo; Spadaro, Salvatore; Comellas Colomé, Jaume (2009-12)
      Article
      Open Access
      This paper concentrates on the resilience of the Generalized Multi-Protocol Label Switching (GMPLS) enabled control plane. To this end, the problem of control plane resilience in GMPLS-controlled networks is firstly stated ...
    • An application of reinforcement learning for efficient spectrum usage in next-generation mobile cellular networks 

      Bernardo Álvarez, Francisco; Agustí Comes, Ramon; Pérez Romero, Jordi; Sallent Roig, Oriol (2010-07)
      Article
      Open Access
      This paper proposes reinforcement learning as a foundational stone of a framework for efficient spectrum usage in the context of nextgeneration mobile cellular networks. The objective of the framework is to efficiently use ...
    • An improved interference alignment scheme for frequency selective channels 

      Shen, Minqi; Host-Madsen, Anders; Vidal Manzano, José (2008)
      Conference report
      Open Access
      In this paper, the achievable rate of a K-user interference channel with single antenna at individual node is studied. Interference alignment and zero forcing are applied at the transmitter and receiver, respectively. ...
    • Analog joint source channel coding using space-filling curves and MMSE decoding 

      Hu, Yichuan; García Frías, Javier; Lamarca Orozco, M. Meritxell (2009)
      Conference report
      Open Access
      We investigate the performance of a discrete-time all-analog-processing joint sourcechannel coding system for the transmission of i.i.d. Gaussian and Laplacian sources over AWGN channels. In the encoder, two samples of ...
    • Analysis and evaluation of decentralized multiaccess Mac for ad-hoc networks 

      Pérez Neira, Ana Isabel; Realp, Marc (2003)
      Conference report
      Open Access
      In mobile ad-hoc radio networks, terminals are mobile and heterogeneous, the architecture of the network is continuously changing, communication links are packet oriented and radio resources are scarce. Therefore, ...
    • Analysis and synthesis of textures through the inference of Boolean functions 

      Domínguez Pumar, Manuel; Torres Urgell, Lluís (1997-05)
      Article
      Restricted access - publisher's policy
      This work deals with Boolean functions of non-linear and linear basis. The Boolean random functions of non-linear basis were proposed by Serra (1988,1989). These functions are generated through a Poisson point process upon ...
    • Analysis of orthogonal transmit beamforming using statistical channel information 

      Xu, Hongji; Liu, Ju; Rubio, Francisco; Pérez Neira, Ana Isabel (2005-12)
      Article
      Restricted access - publisher's policy
      The multiple-access interference (MAI) is one of the major factors threatening the performance of multiuser systems. Transmit beamforming is a powerful strategy to increase the system capacity and mitigate interference. ...
    • Analytical modelling of 200 GHz SiGe HBT high-frequency noise parameters 

      López González, Juan Miguel (2010-10-01)
      Article
      Restricted access - publisher's policy
      This paper presents an analytical model for high-frequency noise of high-speed SiGe heterojunction bipolar transistors (HBTs). The model allows circuit level noise parameters to be obtained: the minimum noise figure, the ...
    • Análisis de stubs radiales en circuito abierto como elementos de circuito microstrip 

      de los Reyes, Elías; Ferrando, Miguel; Comerón Tejero, Adolfo (Unión Científica Internacional de Radio (URSI), 1983)
      Conference report
      Open Access
      This paper presents an analysis of radial microstrip transmission lines, practical design corrections and comparison with measurements perfomed on Duroid 5880. It is proposed the use of the radial lines in combination with ...