Exploració per autor "Bas, Joan"

Ara es mostren els items 1-7 de 7

    • Desarrollo de una aplicación para la simulación de la propagación óptica en situaciones de turbulencia atmosférica 

      Salazar Suárez, Ferran; Marzoa Domínguez, Antonio; Bas, Joan (Sociedad Española de Óptica (SEDOPTICA), 2021)
      Comunicació de congrés
      Accés obert
      Un problema clásico en el ámbito de las comunicaciones ópticas es el efecto de la turbulencia atmosférica en la propagación del canal óptico. Los distintos parámetros atmosféricos, así como su variabilidad, hacen que se ...

    • Indoor monitoring system based on ARQ signaling generated by a Visible Light Communication link 

      Bas, Joan; Ortega Redondo, Juan Antonio; Busquets González, Martí; Dowhuszko, Alexis (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Visible Light Communications (VLC) is a candidate technology that complements the benefits of radio communication networks, particularly in those situations where a low-cost solution using license-free spectrum is required ...

    • Mutual information analysis of frequency packing schemes in multi-beam satellite systemswith phase noise 

      Bas, Joan; Caus López, Marius; Pérez Neira, Ana Isabel; Modenini, Andrea; Ebert, Johannes; García Armada, Ana (Curran, 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper analyzes frequency packing schemes applied to multibeam satellite systems. In order to simulate a realistic scenario we have taken into account the presence of co-channel interference and spectrum limitations. ...

    • New satellite random access preamble design based on pruned DFT-spread FBMC 

      Caus López, Marius; Pérez Neira, Ana Isabel; Bas, Joan; Blanco Botana, Luis (2020-07)
      Article
      Accés obert
      Next generation satellite payload technology is expected to provide digital processing capabilities. This will pave the way to regard satellites as flying base stations. However, the initial access procedure must be improved. ...

    • On the physical layer security of IoT devices over satellite 

      Bas, Joan; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés obert
      The security in satellite communications is a key issue due to the large footprint of the beams. This is specially critical in IoT devices that transmit data directly to satellite. Take into account that IoT devices are ...

    • Performance evaluation of frame slotted-ALOHA with succesive interference cancellation in machine-to-machine networks 

      Vázquez-Gallego, Francisco; Rietti, Marc; Bas, Joan; Alonso-Zárate, Jesús; Alonso Zárate, Luis Gonzaga (VDE Conference Publications, 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Machine-to-Machine (M2M) area networks connect a gateway with a huge number of energy-constrained end-devices. Therefore, energy efficiency is essential to prolong the lifetime of M2M networks. In this paper, we consider ...

    • Practical security considerations for IoT systems over satellite 

      Bas, Joan; Pérez Neira, Ana Isabel (Ka and Broadband Communications, Navigation and Earth Observation Conference, 2019)
      Text en actes de congrés
      Accés obert
      Currently, the forecast for the European market for IoT is a yearly 19.8% increase up to reach $241 billion in 2025. Thisstrong growing will be concentrated in verticals from manufacturing, utilities, retail and transportation ...