Ara es mostren els items 21-40 de 105

  • Cross-layer schedulling strategy for UMTS downlink enhancement 

    Ferrús Ferré, Ramón Antonio; Alonso Zárate, Luis Gonzaga; Umbert Juliana, Anna; Revés Ballesté, Xavier; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-06)
    Article
    Accés obert
    This article describes the benefits of including cross-layer information in the scheduling mechanism of a UMTS downlink channel. In particular, the information obtained from the fast power control algorithm is used to ...
  • D21.3 Analysis of initial results at EuWIN@CTTC 

    Fernandez-Prades, Carles; Masera, Guido; Dardari, Davide; Calanchi, Giacomo; Umbert Juliana, Anna; Pérez Romero, Jordi; Kliks, Adrian; Kryszkiewicz, Pawel; Casadevall Palacio, Fernando José; Closas, Pau; Moragrega, Ana; Arribas, Javier; Bartzoudis, Nikolaos; Font-Bach, Oriol; Payaró, Miquel; Vinogradov, Evgenii; Oestges, Claude; Joseph, Wout; Hanssens, Brecht; Degli-Esposti, Vittorio; Vitucci, Enrico; Fleury, Bernard; Zemen, Thomas; Gan, Mingming; Nafka, Amor (2014-11)
    Report de recerca
    Accés obert
    The nature of this Deliverable of WP2.1 (“Radio interfaces for next-generation wireless systems”) is mainly descriptive and its purpose is to provide a report on the status of the different Joint Research Activities (JRAs) ...
  • D6.2 - Prototype description and field trial results 

    Fouillot, Pascale; Casadevall Palacio, Fernando José; Pérez Romero, Jordi; Gavrilovska, Liljana; Atanasovski, Vladimir; Denkovski, Daniel; Rakovic, Valentin; Pavloski, Mihajlo; Iacobelli, Lorenzo; Faies, Mohammed; Ramos, Filipe; Hau Chin, Woon; Farnham, Tim; Dejonghe, Antoine; Cai, Tao; Lidström, Erik; van de Beek, Jaap; Polydoros, Andreas; Dagres, Ioannis; Sayrac, Berna; Riihijärvi, Janne; Wang, Peng; Mähönen, Petri; Nasreddine, Jad Nayef; Ansari, Junaid; Meshkova, Elena (2012-06)
    Report de recerca
    Accés obert
    Deliverable D6.2 del projecte FARAMIR
  • Decision feedback equalization and carrier recovery in 140 Mbit QAM digital radio systems 

    Olmos Bonafé, Juan José; Agustí Comes, Ramon; Casadevall Palacio, Fernando José (Institute of Electrical and Electronics Engineers (IEEE), 1988)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The tracking behavior of a decision-feedback equalizer coupled to a carrier recovery loop in the presence of dynamic multipath-fading activity is studied. Minimum-phase/non-minimum-phase-type fading transitions, with ...
  • Deffinition and evaluation of JRRM and ASM algorithms 

    López Benítez, Miguel; Umbert Juliana, Anna; Casadevall Palacio, Fernando José; Pérez Romero, Jordi (2010-01)
    Report de recerca
    Accés obert
    This deliverable (DR9.2) describes the radio resource management, joint radio resource management and advanced spectrum management strategies developed in each of the tasks of WPR.9 during the second year of study. The ...
  • Deployment of indoor LTE small cells in TV white spaces 

    Abdelkader, Abdelrahman; Pérez Romero, Jordi; Umbert Juliana, Anna; Casadevall Palacio, Fernando José; Kliks, Adrian; Kryszkiewicz, Pawel (2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This work focuses on the deployment of LTE small cells acting as secondary transmitters in TVWS for indoor scenarios making use of measurements stored in a Radio Environment Map (REM) that characterizes the DVB-T reception. ...
  • Design and implementation of a wide-band real-time mobile channel emulator 

    Olmos Bonafé, Juan José; Gelonch Bosch, Antonio José; Casadevall Palacio, Fernando José; Femenias Nadal, Guillem (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1999-05)
    Article
    Accés obert
    A new wide-band mobile channel emulator for the CODIT project is designed and implemented. The UMTS code-division testbed (CODIT R2020) is a research project within the European RACE-II program set up by the Commission of ...
  • Design and implementation of a wide-band real-time mobile channel emulator 

    Olmos Bonafé, Juan José; Gelonch Bosch, Antonio José; Casadevall Palacio, Fernando José; Femenias Nadal, Guillem (1999-05)
    Article
    Accés obert
    A new wide-band mobile channel emulator for the CODIT project is designed and implemented. The UMTS code-division testbed (CODIT R2020) is a research project within the European RACE-II program set up by the Commission of ...
  • Design principles and performance evaluation of mSCTP-CMT for transport-layer based handover 

    Budzisz, Lukasz; Ferrús Ferré, Ramón Antonio; Casadevall Palacio, Fernando José (2009-04)
    Text en actes de congrés
    Accés obert
    Handling mobility at the transport layer is a promising approach to achieve seamless handover in the context of heterogeneous wireless access networks. In particular, features such as multihoming and dynamic address ...
  • Determinación de la probabilidad de error en sistemas de comunicación digital por fibras ópticas: estudio comparativo de métodos “cuasi-exactos” 

    Casadevall Palacio, Fernando José; Junyent Giralt, Gabriel; Olmos Bonafé, Juan José; Agustí Comes, Ramon (1983)
    Text en actes de congrés
    Accés obert
    En este trabajo se presenta un estudio comparativo de diversos métodos para calcular la probabilidad de error en un sistema de comunicación digital por fibra óptica. Los procedimientos utilizados permiten determinar el ...
  • Discrete-time spectrum occupancy model based on Markov chain and duty cycle models 

    Casadevall Palacio, Fernando José; López Benítez, Miguel (2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents an empirical time-dimension model of spectrum use in the context of dynamic spectrum access. Concretely, a discrete-time two-state Markov chain with novel duty cycle models is proposed as an adequate ...
  • Diseño óptimo del preamplificador de recepción para un sistema de transmisión de datos a alta velocidad por fibra óptica 

    Casadevall Palacio, Fernando José; Junyent Giralt, Gabriel; Agustí Comes, Ramon (1983)
    Text en actes de congrés
    Accés obert
    En esta comunicación se realiza el análisis y el diseño óptimo desde el punto de vista de ruido del amplificador de recepción de un sistema de transmisión de datos a alta velocidad por fibra óptica. Su estructura es la de ...
  • DR9.3 Final report of the JRRM and ASM activities 

    Debbah, Merouane; Kliks, Adrian; Moy, Christophe; Palicot, Jacques; Jouini, Wassim; Casadevall Palacio, Fernando José; Umbert Juliana, Anna; López Benítez, Miguel; Pérez Romero, Jordi; Serrador, António; Caeiro, Luisa; Correia, Luis; Moretti, Marco; Bezerra Rodrigues, Emanuel; Sroka, Pawel; Bogucka, Hanna (2010-12)
    Report de recerca
    Accés obert
    This deliverable provides the final report with the summary of the activities carried out in NEWCOM++ WPR9, with a particular focus on those obtained during the last year. They address on the one hand RRM and JRRM strategies ...
  • DVB-T channels measurements for the deployment of outdoor REM databases 

    Kryszkiewicz, Pawel; Kliks, Adrian; Cichon, Krzysztof; Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The goal of this work is to discuss the stability and other important features of the observed spectrum occupancy in the context of outdoor Radio Environment Maps database deployment. Reliable deployment ...
  • DVB-T channels measurements for the deployment of outdoor REM databases 

    Kliks, Adrian; Kryszkiewicz, Pawel; Cichon, Krzysztof; Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (2014)
    Article
    Accés restringit per política de l'editorial
    In this paper the analysis of the spectrum occupancy in the TV band is provided based on the outdoor measurements campaigns carried out in Poznan, Poland in 2013 and 2014. The goal of this work is to discuss the stability ...
  • DVB-T channels power measurements in indoor/outdoor cases 

    Kliks, Adrian; Kryszkiewicz, Pawel; Cichon, Krzysztof; Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (Institute of Electronics, Information and Communications Engineers (IEICE), 2014)
    Comunicació de congrés
    Accés obert
    In this paper the analysis of the spectrum occupancy in the TV band is provided based on the indoor and outdoor measurements campaigns carried out in Poznan, Poland, and Barcelona, Spain, in 2013. The goal of this work ...
  • Ecualización en banda base para sistemas de transmisión digital por fibra óptica a alta velocidad: estudio comparativo de diferentes criterios de diseño 

    Casadevall Palacio, Fernando José; Junyent Giralt, Gabriel (Unión Científica Internacional de Radio (URSI), 1983)
    Text en actes de congrés
    Accés obert
    For data rates above 100Mb/s, multimode systems are generally modal dispersion rather than loss limited and some form of equalization is highly desired. We have investigated the performance of varius equalizers. Linear ...
  • Egalisation no-lineaire en fibre optique a 140 et 560 Mbit/s 

    Junyent Giralt, Gabriel; Agustí Comes, Ramon; Casadevall Palacio, Fernando José (Institute of Electrical and Electronics Engineers (IEEE), 1982)
    Text en actes de congrés
    Accés obert
    Dans cet article, on introduit un égaliseur non-linéaire du type récursif avec décision dans la boucle pour compenser les effets de l'interférence entre symboles qui est présente dans un système de transmission numérique ...
  • Empirical Time-Dimension Model of Spectrum Use Based on a Discrete-Time Markov Chain With Deterministic and Stochastic Duty Cycle Models 

    López Benítez, Miguel; Casadevall Palacio, Fernando José (2011-07)
    Article
    Accés restringit per política de l'editorial
    The spectrum occupancy models widely used to date in dynamic spectrum access/cognitive radio (DSA/CR) research frequently rely on assumptions and oversimplifications that have not been validated with empirical measurement ...
  • Energy and spectral efficiencies tradeoff with filter optimization in multiple access interference-aware networks 

    Souza, Alvaro R.C.; Abrao, Taufik; Sampaio, Lucas H.; Jeszensky, Paul Jean E.; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (Wiley-Blackwell, 2013-08)
    Article
    Accés restringit per política de l'editorial
    In this contribution, the optimised deployment of both spectrum and energy resources scarcely available in the mobile multiple access systems has been analysed, with special attention to the impact of the filter design on ...