Ara es mostren els items 13-26 de 26

    • NOMA-enabled multi-beam satellite systems: Joint optimization to overcome offered-requested data mismatches 

      Wang, Anyue; Lei, Lei; Lagunas Targarona, Eva; Pérez Neira, Ana Isabel; Chatzinotas, Symeon; Ottersten, Björn (Institute of Electrical and Electronics Engineers (IEEE), 2021-01)
      Article
      Accés obert
      Non-Orthogonal Multiple Access (NOMA) has the potentials to improve the performance of multi-beam satellite systems. The performance optimization in satellite-NOMA systems can be different from that in terrestrial-NOMA ...
    • On fairness optimization for NOMA-enabled multi-beam satellite systems 

      Wang, Anyue; Lei, Lei; Lagunas Targarona, Eva; Pérez Neira, Ana Isabel; Chatzinotas, Simeon; Ottersten, Bjorn (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés obert
      In a multi-beam satellite communication system, traffic requests are typically asymmetric across beams and highly heterogeneous among terminals. In practical operations, it is important to achieve a good match between the ...
    • Pattern matching for building feature extraction 

      Lagunas Targarona, Eva; Amin, Moeness G.; Ahmad, Fauzia; Nájar Martón, Montserrat (2014-12-01)
      Article
      Accés restringit per política de l'editorial
      We address the problem of detecting building dominant scatterers using a reduced number of measurements with applications to through-the-wall radar (TWR) and urban sensing. We consider oblique illumination, which specially ...
    • Precoding with received-interference power control for multibeam satellite communication systems 

      Lagunas Targarona, Eva; Pérez Neira, Ana Isabel; Martínez Gost, Marc; Lagunas Hernandez, Miguel A.; Vázquez Oliver, Miguel Ángel; Ottersten, Björn (Frontiers Media SA, 2021-05-24)
      Article
      Accés obert
      Zero-Forcing (ZF) and Regularized Zero-Forcing (RZF) precoding are low-complexity sub-optimal solutions widely accepted in the satellite communications community to mitigate the resulting co-channel interference caused by ...
    • Robust primary user identification using compressive sampling for cognitive radios 

      Lagunas Targarona, Eva; Nájar Martón, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In cognitive radio (CR), the problem of limited spectral resources is solved by enabling unlicensed systems to opportunistically utilize the unused licensed bands. Compressive Sensing (CS) has been successfully applied to ...
    • Shared access satellite-terrestrial reconfigurable backhaul network enabled by smart antennas at mm-wave band 

      Artiga Campos, Xavier; Pérez Neira, Ana Isabel; Baranda Hortigüela, Jorge; Lagunas Targarona, Eva; Chatzinotas, Symeon; Ziaragkas, Georgios (2018-09-01)
      Article
      Accés obert
      5G traffic expectations require not only the appropriate access infrastructure, but also the corresponding backhaul infrastructure to ensure a well-balanced network scaling. Optical fibre and terrestrial wireless backhaul ...
    • Space-time-frequency candidate methods for spectrum sensing 

      Lagunas Targarona, Eva; Nájar Martón, Montserrat; Lagunas Hernandez, Miguel A. (2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The basic idea behind Cognitive Radio (CR) is to allow unlicensed users to utilize licensed frequency bands when they do not interfere to the primary (licensed) users. Thus, an important requirement of CR systems is to ...
    • Sparse channel estimation based on compressed sensing theory for UWB systems 

      Lagunas Targarona, Eva (Universitat Politècnica de Catalunya, 2010-12-23)
      Projecte Final de Màster Oficial
      Accés obert
      Català: L'estimació de canal en receptors wireless esdevé un factor determinant a l'hora de incrementar les prestacions dels sistemes sense fils per tal de satisfer les exigències cada vegades més elevades dels consumidors ...
    • Sparse correlation matching-based spectrum sensing for open spectrum communications 

      Lagunas Targarona, Eva; Nájar Martón, Montserrat (2012-02)
      Article
      Accés obert
      To deal with the current spectrum scarcity problem and exploiting the fact that exclusive access through tightly regulated licensing leads to idle spectrum, cognitive radio has been proposed as a way to reuse this ...
    • Spatial sparsity based direct positioning for IR-UWB in IEEE 802.15.4a channels 

      Lagunas Targarona, Eva; Navarro, Mònica; Closas Gómez, Pau; Nájar Martón, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, we focus on the application of Compressive Sensing (CS) techniques to Impulse Radio (IR) Ultra-WideBand (UWB) positioning systems under indoor propagation environments. Direct Position Estimation (DPE) ...
    • Spectral feature detection with Sub-Nyquist sampling for wideband spectrum sensing 

      Lagunas Targarona, Eva; Nájar Martón, Montserrat (2015-07-01)
      Article
      Accés obert
      Compressive sensing (CS) has been successfully applied to alleviate the sampling bottleneck in wideband spectrum sensing leveraging the sparsity described by the low spectral occupancy of the licensed radios. However, the ...
    • TOA Estimation in UWB: Comparison between time and frequency domain processing 

      Lagunas Targarona, Eva; Taponecco, Lorenzo; Nájar Martón, Montserrat; D'Amico, Antonio (2010)
      Text en actes de congrés
      Accés obert
      A comparison between time and frequency domain TOA estimators compliant with the 802.15.4a Standard has been made. The time domain estimator is done in two stages. One has the goal of identify the rst pulse in each symbol ...
    • Transmit beamforming design with received-Interference power constraints: The Zero-Forcing Relaxation 

      Lagunas Targarona, Eva; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.; Vázquez Oliver, Miguel Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
      Accés obert
      The use of multi-antenna transmitters is emerging as an essential technology of the future wireless communication systems. While Zero-Forcing Beamforming (ZFB) has become the most popular low-complexity transmit beamforming ...
    • Wall mitigation techniques for indoor sensing within the compressive sensing framework 

      Lagunas Targarona, Eva; Amin, Moeness G.; Ahmad, Fauzia; Nájar Martón, Montserrat (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Compressive sensing (CS) for urban operations and through-the-wall radar imaging has been shown to be successful in fast data acquisition and moving target localizations. However, the research work in this area thus ...