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Ara es mostren els items 102-121 de 252

    • Flexible MIMO architectures: guidelines in the design of MIMO parameters 

      Payaró Llisterri, Miquel; Pascual Iserte, Antonio; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (2005)
      Text en actes de congrés
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      One of the multiple advantages of communicating through MIMO systems is their inherent ability to provide flexible configurations. Following this line of thought, in this paper we present a generic framework to study ...

    • Forward link interference mitigation in mobile interactive satellite systems 

      Henarejos Hernández, Pol; Vazquez, Miguel Angel; Cocco, Giuseppe; Pérez Neira, Ana Isabel (American Institute of Aeronautics and Astronautics (AIAA), 2013)
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      We present the results of the performance evaluation of polarization-time coding and soft interference cancellation in multi-beam satellite systems a ected by co-channel interference in realistic setups. The standard of ...

    • Fuzzy adaptive signal predistorter for OFDM signals 

      Bas Botella, Juan Antonio; Pérez Neira, Ana Isabel (Eurasip, 2000)
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      This work develops an adaptive High Power Amplifier (HPA) predistorter that applies the fuzzy logic and fuzzy set theory. As Volterra and Fourier series models or Neural Networks, a fuzzy logic system (FLS) is a nonlinear ...

    • Fuzzy inference based robust beamforming 

      Morell Pérez, Antoni; Pascual Iserte, Antonio; Pérez Neira, Ana Isabel (2005-10)
      Article
      Accés restringit per política de l'editorial
      This paper presents a new approach to robust beamforming based on fuzzy logic theory that is suitable for both point and scattered sources. The presented technique is based on the optimum beamformer and makes it robust to ...

    • Fuzzy logic for robust detection in wireless communications 

      Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.; Bas, J (Institute of Electrical and Electronics Engineers (IEEE), 1997)
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      This work addresses the problem of spatial reference estimation in mobile scenarios. Novel techniques based on fuzzy logic are introduced to enhance the performance of a tracking system. Specifically, the model-free function ...

    • Fuzzy logic in signal processing 

      Pérez Neira, Ana Isabel (2000-06-01)
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      Accés restringit per política de l'editorial

    • Fuzzy techniques for robust localization & tracking 

      Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.; Bas, J (GRETSI SERVICE, 1997)
      Text en actes de congrés
      Accés obert
      This work addresses the problem of spatial reference estimation in mobile scenarios. Novel techniques based on fuzzy logic are introduced to enhance the performance of a tracking system. Specifically, the model-free ...

    • Fuzzy-based spectrum handoff in cognitive radio networks crowncom 

      Giupponi, Lorenza; Pérez Neira, Ana Isabel (2008)
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      This paper focuses on spectrum handoffs in a cognitive radio network where secondary (unlisenced) users (i.e. cognitive radios) opportunistically use frequency channels as long as the aggregate interference caused at ...

    • Gedomis: un testbed multi-antenna en temps real 

      Font Bach, Oriol; López Bueno, David; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; Pérez Neira, Ana Isabel (2008-06)
      Article
      Accés restringit per política de l'editorial
      Els sistemes multi-antena són una solució tecnològica viable cada cop més present als estàndards de sistemes ràdio actuals. Aquí presentem el demostrador Gedomis en procés de desenvolupament per provar la viabilitat ...

    • Generalized multicast multibeam precoding for satellite communications 

      Joroughi, Vahid; Vázquez, Miguel Ángel; Pérez Neira, Ana Isabel (2017-02-01)
      Article
      Accés obert
      This paper deals with the problem of precoding in multibeam satellite systems. In contrast to general multiuser multiple-input-multiple-output cellular schemes, multibeam satellite architectures suffer from different ...

    • Gestión inteligente de los recursos radio para redes Ad-hoc de alta velocidad a través del desarrollo de técnicas de lógica Fuzzy, procesado de señal y protocolos de acceso al medio 

      Pérez Neira, Ana Isabel; Pascual Iserte, Antonio; Nájar Martón, Montserrat (2005)
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      The general goal of Girafa is to increase throughput and quality of service (QoS) in ad-hoc networks by applying strategies of reconfigurability and PHY/MAC cross-layer design and by developing techniques involving fuzzy ...

    • GREENET – An early stage training network in enabling technologies for green radio 

      Alonso Zárate, Luis Gonzaga; Di Renzo, Marco; Fitzek, Frank H.P.; Granelli, Fabrizio; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2011)
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      In this paper, we describe GREENET (an early stage training network in enabling technologies for green radio), which is a new project recently funded by the European Commission under the auspices of the 2010 Marie Curie ...

    • GSLC architecture for sequence detectors using spatial diversity 

      Lagunas Hernandez, Miguel A.; Pérez Neira, Ana Isabel; Vidal Manzano, José (1998)
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      The role of advanced front-ends including spatial diversity, has been considered as an independent part of peak-distortion equalizers, Wiener and Viterbi equalizers. This involves that the optimum processing to remove point ...

    • High performance doa trackers derived from paralell low resolution detectors 

      Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (IEEE, 1996)
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      Traditionally, high resolution spectral direction of arrival (DOA) estimation has been associated with algorithms rather than with a processing scheme or architecture. Motivated by previous work on feasible implementations ...

    • High Performance DOA trackers derived from parallel low resolution detectors 

      Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (1996)
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      Traditionally, high resolution spectral direction of arrival (DOA) estimation has been associated with algorithms rather than with a processing scheme or architecture. Motivated by previous work on feasible implementations ...

    • High-rate distributed multi-source cooperation using complex field coding 

      Cano, Alfonso; Gómez Vilardebó, Jesús; Pérez Neira, Ana Isabel; Giannakis, Georgios G. (2009)
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      A multisource cooperative protocol is developed capable of achieving diversity order up to the number of cooperating users at a high throughput. In this design each source jointly encodes its own new information symbol ...

    • High-Throughput Multi-Source Cooperation via Complex-Field Network Codin 

      Li, Guobing; Cano, Alfonso; Gómez Vilardebó, Jesús; Giannakis, Georgios G.; Pérez Neira, Ana Isabel (2011-05)
      Article
      Accés restringit per política de l'editorial
      Physical-layer network coding over wireless networks can provide considerable throughput gains with respect to traditional cooperative relaying strategies at no loss of diversity gain. In this paper, a novel cooperation ...

    • Hybrid analog-digital transmit beamforming for spectrum sharing backhaul networks 

      Vázquez Oliver, Miguel Ángel; Blanco Botana, Luis; Pérez Neira, Ana Isabel (2018-02-14)
      Article
      Accés obert
      This paper deals with the problem of analog-digital transmit beamforming under spectrum sharing constraints for backhaul systems. In contrast to fully digital designs, where the spatial processing is done at baseband unit ...

    • Hybrid analog-digital transmit beamforming for spectrum sharing satellite-terrestrial systems 

      Vazquez, Miguel Angel; Blanco, Luis; Artiga Campos, Xavier; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      This paper deals with the problem of hybrid analog-digital transmit beamforming under spectrum sharing constraints. Hybrid multiantenna architectures are ideal for high throughput wireless links, where full-digital solutions ...

    • Hybrid Space-Ground Processing for High-Capacity Multi-beam Satellite Systems 

      Vanelli-Coralli, A.; Thibault, I.; Pérez Neira, Ana Isabel; Mosquera, C.; Arnau Yañez, J; Bergmann, N; Candreva, E. A.; Corazza, G. E.; de Gaudenzi, R.; Devillers, Bertrand; Gappmair, W; Lombardo, F. (2011)
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      Signal processing in satellite applications is usually performed either on-ground or on-board, i.e. at the gateway station or in the payload. Within the framework of the European Space Agency (ESA) SatNEx III study, a ...