Ara es mostren els items 1-20 de 26

    • Adaptive beam pattern selection and resource allocation for NOMA-based LEO satellite systems 

      Wang, Anyue; Lei, Lei; Hu, Xin; Lagunas Targarona, Eva; Pérez Neira, Ana Isabel; Chatzinotas, Symeon (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      The low earth orbit (LEO) satellite system is one of the promising solutions to provide broadband services to a wide-coverage area for future integrated LEO-6G networks, where users' demands vary with time and geographical ...
    • Casting signal processing to reall-world data 

      Closas Gómez, Pau; Conti, Andrea; Dardari, Davide; Decarli, Nicoló; Falletti, Emanuela; Fernández Prades, Carlos; Gholami, Mohammad Reza; Nájar Martón, Montserrat; Lagunas Targarona, Eva; Pini, Marco; Rydström, Mats; Sottile, Francesco; Ström, Erik G. (Elsevier, 2011-10)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This chapter presents the results of a testing and validation activity carried out to analyze the performance of signal-processing techniques related to positioning and navigation. The steps included the setup of a measurement ...
    • Compressed spectrum sensing in the presence of interference: comparison of sparse recovery strategies 

      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
      Existing approaches to Compressive Sensing (CS) of sparse spectrum has thus far assumed models contaminated with noise (either bounded noise or Gaussian with known power). In practical Cognitive Radio (CR) networks, primary ...
    • Compressive sensing based candidate detector and its applications to spectrum sensing and through-the-wall radar imaging 

      Lagunas Targarona, Eva (Universitat Politècnica de Catalunya, 2014-03-07)
      Tesi
      Accés obert
      Signal acquisition is a main topic in signal processing. The well-known Shannon-Nyquist theorem lies at the heart of any conventional analog to digital converters stating that any signal has to be sampled with a constant ...
    • Compressive sensing for through wall radar imaging of stationary scenes using arbitrary data measurements 

      Lagunas Targarona, Eva; Amin, Moeness G.; Ahmad, Fauzia; Nájar Martón, Montserrat (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, we deal with removal of wall EM reflections prior to image reconstruction using step-frequency radars. The goal is to enable behind-the-wall target detection and localization from reduced data measurements. ...
    • Determining building interior structures using compressive sensing 

      Lagunas Targarona, Eva; Amin, Moeness; Ahmad, Fauzia; Nájar Martón, Montserrat (2013-01-22)
      Article
      Accés obert
      We consider imaging of the building interior structures using Compressive Sensing (CS) with applications to through-the-wall imaging and urban sensing. We consider a monostatic synthetic aperture radar imaging system ...
    • Estimación conjunta de TOA y DOA en sistemas UWB para localización 

      Lagunas Targarona, Eva (Universitat Politècnica de Catalunya, 2009-06)
      Projecte/Treball Final de Carrera
      Accés obert
      El objetivo de este proyecto es el diseño de un algoritmo de localización para sistemas con tecnología Ultra-Wideband (UWB).
    • Innovative signal processing techniques for wireless positioning 

      Dardari, Davide; Di Dio, Mario; Emmanuele, Andrea; Fontanella, Diana; Gezici, Sinan; Gholami, Mohammad Reza; Kieffer, Michel; Lagunas Targarona, Eva; Louveaux, Jérôme; Mallat, Achraf; Nájar Martón, Montserrat; Navarro, Monica; Nicoli, Monica; Reggiani, Luca; Rydström, Mats; Ström, Erik G.; Vandendorpe, Luc; Zanier, Francesca (Elsevier, 2011-10)
      Capítol de llibre
      Accés restringit per política de l'editorial
    • Joint beam-hopping scheduling and power allocation in NOMA-assisted satellite systems 

      Wang, Anyue; Lei, Lei; Lagunas Targarona, Eva; Chatzinotas, Simeon; Pérez Neira, Ana Isabel; Ottersten, Bjorn (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      In this paper, we investigate potential synergies of non-orthogonal multiple access (NOMA) and beam hopping (BH) for multi-beam satellite systems. The coexistence of BH and NOMA provides time-power-domain flexibilities in ...
    • Joint optimization of beam-hopping design and NOMA-assisted transmission for flexible satellite systems 

      Wang, Anyue; Lei, Lei; Lagunas Targarona, Eva; Pérez Neira, Ana Isabel; Chatzinotas, Symeon; Ottersten, Björn (Institute of Electrical and Electronics Engineers (IEEE), 2022-10)
      Article
      Accés obert
      Next-generation satellite systems require more flexibility in resource management such that available radio resources can be dynamically allocated to meet time-varying and non-uniform traffic demands. Considering potential ...
    • Joint TOA and DOA estimation compliant with IEEE 802.15.4a standard 

      Lagunas Targarona, Eva; Nájar Martón, Montserrat; Navarro, Monica (2010)
      Text en actes de congrés
      Accés obert
      Ultra-WideBand (UWB) technology offers the potential of achieving high ranging accuracy through signal Time-Of-Arrival (TOA) measurements, even in harsh enviroments due to its ability to resolve multipath and penetrate ...
    • Joint wall mitigation and compressive sensing for indoor image reconstruction 

      Lagunas Targarona, Eva; Amin, Moeness; Ahmad, Fauzia; Nájar Martón, Montserrat (IEEE Press. Institute of Electrical and Electronics Engineers, 2012)
      Article
      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. The research in this area thus far has assumed ...
    • 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 ...