Exploració per autor "Sala Álvarez, José"Més informacióMés informació

Ara es mostren els items 100-109 de 109

    • Rate allocation in massive multiple access combining successive decoding with error control 

      Molina Oliveras, Francesc; Sala Álvarez, José (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      The Gaussian multiple access channel under asymptotically many code-division-multiple-access users and successive interference cancellation (SIC) is investigated in this work. Users transmit n-symbol packets and select ...

    • Regions de decisió i cota de la unió 

      Sala Álvarez, José (2018-10-01)
      Report de recerca
      Accés obert
      Aquest document presenta de forma gràfica: - La determinació de la regió de decisió R associada a un símbol complexe s = I + jQ . - La determinació de la seva probabilitat d’error i la d’una cot a superior (Cota de la ...

    • SENYALS I SISTEMES (Examen 2n Quadr.) 

      Sala Álvarez, José (Universitat Politècnica de Catalunya, 2002-04-01)
      Examen
      Accés restringit a la comunitat UPC

    • SENYALS I SISTEMES (Examen 2n Quadr.) 

      Sala Álvarez, José (Universitat Politècnica de Catalunya, 2002-06-01)
      Examen
      Accés restringit a la comunitat UPC

    • Separation of digital communication signals through joint space-time decorrelation 

      Sala Álvarez, José; Vázquez Grau, Gregorio (1994)
      Text en actes de congrés
      Accés obert
      In this paper we derive the optimum linear algorithm for the separation by an array of a given number of cyclostationary signals of the type encountered in digital communications. Spatially and temporally uncorrelated noise ...

    • Sidelobe suppression for multicarrier signals via structured spectral precoding 

      Hussain, Khawar; López Valcarce, Roberto; Rey Micolau, Francesc; Sala Álvarez, José; Villares Piera, Nemesio Javier (Institute of Electrical and Electronics Engineers (IEEE), 2024-01-22)
      Article
      Accés obert
      Reducing the large sidelobes of multicarrier signals is crucial to prevent adjacent channel interference. Spectral precoding is an effective approach toward this goal, at the expense of throughput loss due to precoder ...

    • SINR profile for spectral efficiency optimization of SIC receivers in the many-user regime 

      Sala Álvarez, José; Villares Piera, Nemesio Javier; Rey Micolau, Francesc (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Comunicació de congrés
      Accés obert
      In dense wireless scenarios, and particularly under high traffic loads, the design of efficient random access protocols is necessary. Some candidate solutions are based on Direct- Sequence Spread Spectrum ...

    • Spectrum sensing using correlated receiving multiple antennas in cognitive radios 

      Sedighi, Saeid; Taherpour, Abbas; Sala Álvarez, José (2013-11)
      Article
      Accés restringit per política de l'editorial
      Spectrum sensing is a key component for enabling the cognitive radio paradigm. In this paper, we propose a novel totally-blind spectrum sensing technique for cognitive radio device equipped with multiple antennas, namely ...

    • Statistical reference criteria for adaptive signal processing in digital communications 

      Sala Álvarez, José; Vázquez Grau, Gregorio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-01-01)
      Article
      Accés obert
      A general criterion for the design of adaptive systems in digital communications called the statistical reference criterion is proposed. The criterion is based on imposition of the probability density function of the ...

    • Stochastic dynamic models in PHY abstraction 

      Rey Micolau, Francesc; Sala Álvarez, José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Physical Layer (PHY) abstraction aims to model link performance and accelerate system-level analyses of communication systems by reducing simulation complexity and their associated computational costs. We examine a Physical ...