Now showing items 21-40 of 106

    • 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
      Open Access
      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)
      External research report
      Open Access
      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)
      External research report
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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)
      External research report
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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 experimental validation of a software-defined radio access network testbed with slicing support 

      Koutlia, Katerina; Ferrús Ferré, Ramón Antonio; Coronado Calero, Estefanía; Riggio, Roberto; Casadevall Palacio, Fernando José; Umbert Juliana, Anna; Pérez Romero, Jordi (2019-01-01)
      Article
      Open Access
      Network slicing is a fundamental feature of 5G systems to partition a single network into a number of segregated logical networks, each optimized for a particular type of service or dedicated to a particular customer or ...
    • 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
      Open Access
      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
      Open Access
      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)
      Conference report
      Open Access
      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)
      Conference report
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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)
      External research report
      Open Access
      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 

      Kliks, Adrian; Kryszkiewicz, Pawel; Cichon, Krzysztof; Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José (2014)
      Article
      Restricted access - publisher's policy
      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 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)
      Conference report
      Restricted access - publisher's policy
      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 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)
      Conference lecture
      Open Access
      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)
      Conference report
      Open Access
      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)
      Conference report
      Open Access
      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
      Restricted access - publisher's policy
      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 ...