Now showing items 41-60 of 106

  • 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
    Restricted access - publisher's policy
    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 ...
  • Enhanced analysis of WCDMA networks with repeaters deployment 

    García Lozano, Mario; Alonso Zárate, Luis Gonzaga; Casadevall Palacio, Fernando José; Ruiz Boqué, Sílvia; Correia, Luis M. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-08)
    Article
    Open Access
    This paper addresses the analysis of WCDMA systems with repeaters deployment. A generic and compact expression for up- and downlinks evaluation has been mathematically derived so that transmission powers and other radio ...
  • Equalization and space diversity techniques in mobile environments 

    Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José (1994-04)
    Article
    Open Access
    The development of high-quality digital mobile radio systems has become a major goal in the field of digital communications. The possibility of providing speech and data services free of wire constrictions in different ...
  • Equalization and space diversity techniques in mobile environments: under certain conditions, diversity techniques perform better than equalization techniques in typical mobile radio environments 

    Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José (IEEE., 1994-03)
    Article
    Open Access
    The development of high-quality digital mobile radio systems has become a major goal in the field of digital communications. The possibility of providing speech and data services free of wire constrictions in different ...
  • ETSI reconfigurable radio systems – software defined radio and cognitive radio standards 

    Ahtiainen, Ari; Casadevall Palacio, Fernando José; Sallent Roig, José Oriol; Pérez Romero, Jordi; Mueck, Markus; Dimitrakopoulos, George; Tsagkaris, Kostas; Gebert, Jens; Nolte, Klaus; Filin, Stanislav; Harada, Hiroshi; Baldini, Gianmarco (2009)
    Conference report
    Open Access
    This paper details the current work status of the ETSI Reconfigurable Radio Systems (RRS) Technical Committee (TC) and gives an outlook on the future evolution. In particular, Software Defined Radio (SDR) related study ...
  • ETSI reconfigurable radio systems: status and future directions on software defined radio and cognitive radio standards 

    Sallent Roig, José Oriol; Mueck, Markus; Piiponen, Antti; Kalliojarvi, Kari; Dimitrakopoulos, George; Tsagkaris, Kostas; Demestichas, Panagiotis; Casadevall Palacio, Fernando José; Pérez Romero, Jordi; Kandeepan, Sithamparanathan; Street, Michael; Bender, Paul; Deschamps, Benoist; Gebert, Jens; Haustein, Thomas; Debbah, Merouane; Harada, Hiroshi; Filin, Stanislav; Baldini, Gianmarco; Lota, Jaswinder; Hayar, Aawatif (2010-09)
    Article
    Open Access
    This article details the current work status of the ETSI Reconfigurable Radio Systems Technical Committee, positions the ETSI work with respect to other standards efforts (IEEE 802, IEEE SCC41) as well as the European ...
  • Evaluación del nivel de utilización del espectro: Posibilidades de la tecnología cognitive radio en España 

    López Benítez, Miguel; Casadevall Palacio, Fernando José; Umbert Juliana, Anna (2009)
    Conference report
    Open Access
    Cognitive radio has been identified as a promising solution to the so-called spectrum scarcity problem. The basic idea of this paradigm is to allow unlicensed users to access in an opportunistic and non-interfering ...
  • EVEREST IST - 2002 - 00185 : D23 : final report 

    Casadevall Palacio, Fernando José (2005-12-31)
    External research report
    Open Access
    This deliverable constitutes the final report of the project IST-2002-001858 EVEREST. After its successful completion, the project presents this document that firstly summarizes the context, goal and the approach objective ...
  • Fairness-based dynamic sub-carrier assignment for real time services in OFDMA networks 

    Bezerra Rodrigues, Emanuel; Casadevall Palacio, Fernando José (VDE Conference Publications, 2014)
    Conference report
    Restricted access - publisher's policy
    Fairness is a crucial aspect for resource allocation in wireless systems, particularly in the downlink of 4G Orthogonal Frequency Division Multiple Access (OFDMA)-based systems. Therefore, it would be interesting for network ...
  • Feasibility condition for the uplink of a CDMA multiservice mobile communication system with repeaters 

    Alonso Zárate, Luis Gonzaga; García Lozano, Mario; Casadevall Palacio, Fernando José (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05)
    Article
    Open Access
    This paper derives a general analytical expression of the feasibility condition for the uplink of a CDMA mobile communications system in a general scenario where the users in the system belong to an arbitrary number of ...
  • Final report on the evaluation of RRM/CRRM algorithms 

    Barbaresi, Andrea; Casadevall Palacio, Fernando José; Gelabert Doran, Xavier; Majkowski, Jakub; Pérez Romero, Jordi; Sallent Roig, José Oriol; Sánchez González, Juan; Umbert Juliana, Anna; Alayon Glasunov, Andrés; Almeida, Teresa (2005-10-31)
    External research report
    Open Access
    This deliverable provides a definition and a complete evaluation of the RRM/CRRM algorithms selected in D11 and D15, and evolved and refined on an iterative process. The evaluation will be carried out by means of simulations ...
  • Influencia del ruido shot en las prestaciones de los ecualizadores en banda-base en sistemas de transmisión digital por fibra óptica 

    Casadevall Palacio, Fernando José; Junyent Giralt, Gabriel; Agustí Comes, Ramon (1985)
    Conference report
    Open Access
    En este trabajo se analiza la influencia del ruido Shot en la mejora que introduce un ecualizador en las prestaciones de un sistema de transmisión digital con fibra multimodo. Se consideran dos tipos de estructura para el ...
  • Issues on packet transmissioin strategies in a TDD-TD/CDMA scenario 

    Pérez Romero, Jordi; Agustí Comes, Ramon; Sallent Roig, José Oriol; Casadevall Palacio, Fernando José (European Commission, 2000)
    Conference report
    Open Access
    This paper presents a packet transmission scheme that deals with the problems of a TDD CDMA scenario with different levels of frame structure asymmetry in adjacent base stations by distributing the users in the slots ...
  • Modeling and simulation of joint time-frequency properties of spectrum usage in cognitive radio 

    Casadevall Palacio, Fernando José; López Benítez, Miguel; López Pérez, David Orencio; Vasilakos, Athanasios V. (2011)
    Conference report
    Restricted access - publisher's policy
    The development of the Dynamic Spectrum Access/Cogni- tive Radio (DSA/CR) technology can signi cantly bene t from the availability of realistic models able to accurately capture and reproduce the statistical properties ...
  • Modeling and simulation of time-correlation properties of spectrum use in cognitive radio 

    López Benítez, Miguel; Casadevall Palacio, Fernando José (2011)
    Conference report
    Restricted access - publisher's policy
    The development of the cognitive radio technology can enormously benefit from the availability of realistic and accurate spectrum occupancy models. Time-dimension models of spectrum use proposed in the literature so far ...
  • Modelling approach used in the real time emulator of the Rainbow demonstrator 

    Díaz Romero, M. del Pilar; Olmos Bonafé, Juan José; Berberana, Ignacio; Casadevall Palacio, Fernando José (Institute of Electrical and Electronics Engineers (IEEE), 1997)
    Conference report
    Open Access
    An overview of the main characteristics of the real time emulator (RTE) to be implemented in the context of the Rainbow project is presented. First of all, the RTE functional description is shown in order to justify the ...
  • Modelling approach used in the real time emulator of the rainbow demostrator 

    Díaz Romero, M. del Pilar; Olmos Bonafé, Juan José; Berberana, Ignacio; Casadevall Palacio, Fernando José (Institute of Electrical and Electronics Engineers (IEEE), 1997)
    Conference report
    Open Access
    An overview of the main characteristics of the real time emulator (RTE) to be implemented in the context of the Rainbow project is presented. First of all, the RTE functional description is shown in order to justify the ...
  • Monitorización de radioenlaces digitales de gran capacidad 

    Agustí Comes, Ramon; Casadevall Palacio, Fernando José (Universidad de Sevilla, 1984)
    Conference report
    Open Access
    In digital radio links, where the transmission quality is determined by the average error rate, a pseudo-error method is presented to monitor the link performance. Results are shown for a 16 QAM modulation system and 140Mb/s ...
  • On concurrent multipath transfer in SCTP-based handover scenarios 

    Budzisz, Lukasz; Ferrús Ferré, Ramón Antonio; Casadevall Palacio, Fernando José; Amer, Paul (IEEE Computer Society Publications, 2009-06)
    Conference report
    Open Access
    Abstract—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 ...
  • On the behavior of the LINC transmitter 

    Casadevall Palacio, Fernando José; Olmos Bonafé, Juan José (Institute of Electrical and Electronics Engineers (IEEE), 1990)
    Conference report
    Open Access