Exploració per tema "Xarxes de ràdio cognitiva"

Ara es mostren els items 16-26 de 26

    • Low-overhead heuristic algorithms for spectrum sensing in cognitive radio networks 

      Miliotis, Vasileios; Koutsopoulos, Iordanis; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (VDE Conference Publications, 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Cognitive Radio (CR) has matured as a research field and has the goal to improve the utilization of spectrum. This technology enables a CR user to function in unlicensed or licensed bands without causing interference to ...

    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...

    • Modeling the lion attack in cognitive radio networks 

      Hernández Serrano, Juan; León Abarca, Olga; Soriano Ibáñez, Miguel (2011)
      Article
      Accés obert
      Cognitive radio is a promising technology aiming to improve the utilization of the radio electromagnetic spectrum. A cognitive radio is a smart device which runs radio applications software to perform signal processing. ...

    • OneFIT functional and system architecture - D2.2 

      Akezidou, Maria; Gebert, Jens; Lange, Christian; Wich, Andreas; Georgakopoulos, Andreas; Demestichas, Panagiotis; Stavroulaki, Vera; Tsagkaris, Kostas; Tzifa, Lia; Schmidt, Andreas; Mueck, Markus; Martin, Oscar; Visiedo, David; Moreno, Oscar; Bantouna, Aimilia; Kritikou, Yiouli; Koutsouris, Nikos; Thomatos, Evangelos; Logothetis, Marios; Mouton, Christian; Tosic, M.; Bender, Paul; Sallent Roig, Oriol; Boskovic, Dragan; Filo, Marcin; Ferrús Ferré, Ramón Antonio; Mustonen, Miia; Matinmikko, Marja (2011-02-28)
      Report de recerca
      Accés obert
      This document presents the OneFIT functional and system architecture for the management and control of infrastructure coordinated opportunistic networks (ONs). The most relevant building blocks "Cognitive management System ...

    • Radio environmental maps: information models and reference model. Document number D4.1 

      Casadevall Palacio, Fernando José; Agustí Comes, Ramon; Pérez Romero, Jordi; López Benítez, Miguel; Grimoud, Sebastien; Sayrac, Berna; Dagres, Ioannis; Polydoros, Andreas; Riihijärvi, Janne; Nasreddine, Jad Nayef; Mähönen, Petri; Gavrilovska, Liljana; Atanasovski, Vladimir; van de Beek, Jaap (2011-04-30)
      Report de recerca
      Accés obert
      We describe herein the envisioned improvements of the REMs due to advanced sensing and processing. In relation to that, we also discuss the underlying modelling assumptions. Finally, we comment on how REMs can be of use ...

    • Reinforcement learning for load management in DiffServ-MPLS mobile networks 

      Vucevic, Nemanja; Pérez Romero, Jordi; Sallent Roig, Oriol; Agustí Comes, Ramon (2009)
      Text en actes de congrés
      Accés obert
      Cognitive networks are envisaged to provide optimized resource usage in future. While heterogeneity and resource scarcity draw research attention to the wireless part, the rest of the network (mobile backhaul) is rarely ...

    • Resource Management in Multicarrier Based Cognitive Radio Systems 

      Shaat, Musbah M. R. (Universitat Politècnica de Catalunya, 2012-03-09)
      Tesi
      Accés obert
      The ever-increasing growth of the wireless application and services affirms the importance of the effective usage of the limited radio spectrum. Existing spectrum management policies have led to significant spectrum ...

    • Securing cognitive radio networks 

      León Abarca, Olga; Hernández Serrano, Juan; Soriano Ibáñez, Miguel (2010-05)
      Article
      Accés restringit per política de l'editorial

    • Spectrum sharing in cognitive radio networks with imperfect sensing: a discrete-time Markov model 

      Gelabert Doran, Xavier Bernardi; Sallent Roig, Oriol; Agustí Comes, Ramon; Pérez Romero, Jordi (2010-10)
      Article
      Accés restringit per política de l'editorial
      An efficient and utmost utilization of currently scarce and underutilized radio spectrum resources has stimulated the introduction of what has been coined Cognitive Radio (CR) access methodologies and implementations. While ...

    • Study of admission and control system in a centralized cognitive radio network for heterogeneous wireless frequency devices 

      Torró Vilert, Albert (Universitat Politècnica de Catalunya, 2011-05-25)
      Projecte Final de Màster Oficial
      Accés obert
      This project focuses on the Cognitive Radio Technology initially proposed by Joseph Mitola at the end of 90s. The concept of Cognitive Radio introduces the idea that nowadays telecommunications systems must be aware of the ...