Enviaments recents

  • A mobile controlled algorithm for improving the throughput in a s-aloha ds-cdma system 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 1996)
    Text en actes de congrés
    Accés obert
    This paper presents a novel adaptive DS-CDMA slotted-ALOHA packet random access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving the throughput and message delay delivery when traffic ...
  • Performance of a linear interference canceller for a ds/cdma synchronous system based on the ekf delay estimator 

    Díaz Romero, M. del Pilar; Agustí Comes, Ramon (. S.N., 1995)
    Text en actes de congrés
    Accés obert
    Since the conventional detector often fails to produce reliable decisions for a CDMA channel, several new multiuser detectors have previously proposed. In the present paper, the authors propose both a simple linear scheme ...
  • On the virtualization and dynamic orchestration of satellite communication services 

    Ferrús Ferré, Ramón Antonio; Koumaras, Harilaos; Sallent Roig, José Oriol; Rasheed, Tinku; Duros, Emmanuel; Riggio, R.; Kuhn, Nicolas; Gélard, Patrick; Ahmed, Toufik (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés obert
    Key features of satellite communications such as wide-scale coverage, broadcast/multicast support and high availability, together with significant amounts of new satellite capacity coming online, anticipate new opportunities ...
  • SDN and NFV for satellite infrastructures 

    Agapiou, George; Ferrús Ferré, Ramón Antonio; Koumaras, Harilaos; Sallent Roig, José Oriol; Rasheed, Tinku; Kuhn, Nicolas; Ahmed, Toufik (Institute of Electronics, Information and Communications Engineers (IEICE), 2016)
    Text en actes de congrés
    Accés obert
    The integration of SDN and NFV enablers into the satellite network could prove to be an essential means to save on physical sites, improve the time to bring new services to the market and open new ways to improve ...
  • Frequency planning optimisation in real mobile networks 

    Ruiz Boqué, Sílvia; Colet, X; Estevez, J (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Text en actes de congrés
    Accés obert
    Due to the annual increase of cellular subscribers, there is a growing interest by the network operators, in how to deploy the network infrastructure to achieve maximum capacity. A key point is the channel or frequency ...
  • On soft/hard handoff for packet data services in cellular CDMA mobiles systems 

    Ferrús Ferré, Ramón Antonio; Díaz Romero, M. del Pilar (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Text en actes de congrés
    Accés obert
    Benefits of macrodiversity operation for packet data services in third generation mobile systems are not obvious. Retransmission procedures to enhance link performance and higher downlink bandwidth requirements could ...
  • An efficient data transmission policy in an integrated voice-data ds-cdma network 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (IEEE Vehicular Technology Society, 1998)
    Text en actes de congrés
    Accés obert
    CDMA schemes appear to be promising access techniques for coping with the requirements of third-generation mobile systems, mainly because of their flexibility. This paper proposes an adaptive S-ALOHA DS-CDMA access scheme ...
  • Adaptive schemes for packet data in a ds-cdma environment 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC., 1997)
    Text en actes de congrés
    Accés obert
    This paper presents a novel adaptive DS-CDMA slotted-ALOHA packet random access scheme for improving the throughput of the conventional DS-CDMA slotted-ALOHA system. For this purpose a mobile-assisted algorithm is envisaged ...
  • PERFORMANCE OF TWO BRANCH SPACE AND POLARIZATION DIVERSITY AT 900 MHz 

    Ruiz Boqué, Sílvia; Vilades, M; RODRIGUEZ, J (IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC., 1997)
    Text en actes de congrés
    Accés obert
    This work summarizes the results of a measurement campaign undertaken to evaluate the performance of two branch space and polarization diversity schemes at 900 MHz in different environments (urban, suburban, rural flat and ...
  • Performance of Adaptive Bayesian equalizers in outdoor environments 

    Valenzuela González, José Luis; Casadevall Palacio, Fernando José (IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC., 1997)
    Text en actes de congrés
    Accés obert
    Outdoor communications are affected by multipath propagation that imposes an upper limit on the system data rate and restricts possible applications. In order to overcome the degrading effect introduced by the channel, ...

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