Enviaments recents

  • Estimation and control in energy harvesting wireless communication networks 

    Calvo Fullana, Miguel (Universitat Politècnica de Catalunya, 2017-07-25)
    Tesi
    Accés obert
    Long thought to be an unattainable ambition, self-sustainable and green-powered wireless networks are rapidly becoming a reality. This is driven by recent hardware improvements in what is known as Energy Harvesting (EH). ...
  • Polarization and index modulations : a theoretical and practical perspective 

    Henarejos Hernández, Pol (Universitat Politècnica de Catalunya, 2017-07-19)
    Tesi
    Accés obert
    Radiocommunication systems have evolved significantly in recent years in order to meet present and future demands. Historically, time, frequency and more recently, spatial dimensions have been used to improve capacity and ...
  • Energy efficient offloading techniques for heterogeneous networks 

    Miliotis, Vasileios (Universitat Politècnica de Catalunya, 2016-03-11)
    Tesi
    Accés obert
    Mobile data offloading has been proposed as a solution for the network congestion problem that is continuously aggravating due to the increase in mobile data demand. The concept of offloading refers to the exploitation of ...
  • Subset selection in signal processing using sparsity-inducing norms 

    Blanco Botana, Luis (Universitat Politècnica de Catalunya, 2017-07-22)
    Tesi
    Accés obert
    This dissertation deals with different subset selection problems in wireless communications systems. These type of problems have a combinatorial nature, which makes them computationally intractable for medium and large-scale ...
  • Multi-view depth coding based on a region representation combining color and depth information 

    Maceira Duch, Marc (Universitat Politècnica de Catalunya, 2017-06-21)
    Tesi
    Accés obert
    Depth map data is used to supplement the color data in multi-view sequences. As depth maps present distinct Characteristics than natural color images, new coding techniques are required to represent their smooth regions ...
  • Medium-transparent MAC protocols for converged optical wireless networks 

    Kalfas, Georgios (Universitat Politècnica de Catalunya, 2017-05-12)
    Tesi
    Accés obert
    In order to address the explosive demand for high-capacity and omnipresent wireless access, modern cell-based wireless networks are slowly adopting two major solution roadmaps. The first is the employment of small-cell ...
  • Study of gene regulatory networks inference methods from gene expression data 

    Bellot Pujalte, Pau (Universitat Politècnica de Catalunya, 2017-05-08)
    Tesi
    Accés obert
    A cell is a the basic structural and functional unit of every living thing, it is protein-based an that regulates itself. The cell eats to stay alive, it grows and develops; reacting to the environment, while subjected to ...
  • Dispersive source models in wireless communications subscriber location 

    Játiva Espinoza, René (Universitat Politècnica de Catalunya, 2017-04-06)
    Tesi
    Accés obert
    Mobile subscriber positioning is an issue in permanent revision due to the new possibilities of relation that the knowledge of the position introduces, among users and an increasing number of devices. This problem is boarded ...
  • Large vocabulary continuous speech recognition for the transcription of Catalan broadcast news and conversations : towards analysis and modelling of acoustic reduction in spontaneous speech 

    Schulz, Henrik (Universitat Politècnica de Catalunya, 2017-03-02)
    Tesi
    Accés obert
    The transcription of spontaneous speech still poses a challenge to state-of-the-art methods for automatic speech recognition. The present thesis describes the comprehensive development of a large vocabulary continuous ...
  • Robust indoor positioning in WLAN networks 

    Castro-Arvizu, Juan Manuel (Universitat Politècnica de Catalunya, 2017-03-24)
    Tesi
    Accés obert
    Navigation and location technologies have been reaching in a major interest where Global Navigation Satellite System (GNSS) is mostly adopted. The limitation of this technology is that direct sky view is needed for reliable ...
  • Orbital differential SAR interferometry with polarimetric data 

    Monells Miralles, Daniel (Universitat Politècnica de Catalunya, 2017-01-18)
    Tesi
    Accés obert
    Space-borne Synthetic Aperture Radar (SAR) systems have demonstrated great effectiveness to survey wide areas, independently of the weather conditions and the day/night cycle. One of the most exploited applications is ...
  • Region-based particle filter leveraged with a hierarchical co-clustering 

    Varas González, David (Universitat Politècnica de Catalunya, 2016-11-14)
    Tesi
    Accés obert
    In this thesis, we exploit the hierarchical information associated with images to tackle two fundamental problems of computer vision: video object segmentation and video segmentation. In the first part of the thesis, we ...

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