Universitat Politècnica de Catalunya
Now showing items 172-191 of 321
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 ...
This thesis aims to study different language-specific approaches for Multilingual Machine Translation without parameter sharing and their properties compared to the current state-of-the-art based on parameter-sharing. We ...
The ability to capture depth information form an scene has greatly increased in the recent years. 3D sensors, traditionally high cost and low resolution sensors, are being democratized and 3D scans of indoor and outdoor ...
This Ph.D. thesis addresses remote sensing of the atmosphere by means of lidar and S-band clear-air weather radar, and related data signal processing. Active remote sensing by means of these instruments offers unprecedented ...
This Ph.D. thesis focuses on: (i) the design and integration of a polarimetric channel for the multi-spectral Raman lidar station of the Universitat Politècnica de Catalunya (UPC), Remote Sensing, Antennas, Microwaves and ...
LIDAR es un acrónimo de LIght Detection And Ranging. En la presente tesis, se usan técnicas basadas en lidar elástico para monitorizar la atmósfera remotamente y derivar información cuantitativa acerca de sus parámetros ...
Els objectius principals d'aquesta tesis són l'avaluació del rendiment a nivell d'enllaç i l'estudi de l'abstracció de l'enllaç pel LTE/LTE-Advanced DL. S’ha desenvolupat un simulador del nivell d'enllaç E-UTRA DL basat ...
The tremendous increase in data traffic has spurred a rapid evolution of the optical networks for a reliable, affordable, cost effective and scalable network infrastructure. To meet some of these requirements, network ...
Els oceans mantenen una fràgil i complexa cadena que enllaça un alt nombre de factors biològics, sociològics i econòmics. Actualment, aquest ecosistema està amenaçat per l'activitat humana i uns dels punts més crítics és ...
In matrix completion, the objective is to recover an unknown matrix from a small subset of observed entries. Most successful methods for recovering the unknown entries are based on the assumption that the unknown full ...
Since the earliest of times, humans have been interested in recording their life experiences, for future reference and for storytelling purposes. This task of recording experiences --i.e., both image and video capture-- ...
En esta Tesis se utiliza una técnica de fuente adaptada para medir los parámetros de ruido de transistores de efecto campo, como MESFET y HEMT. Para ello, se ha implementado un sistema de medida en el margen de frecuencias ...
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 ...
El objetivo básico de la tesis ha sido el desarrollo de algoritmos de reconstrucción que permiten obtener imágenes de cuerpos biológicos de alto contraste. Los datos de entrada de los distintos algoritmos son los campos ...
La región de microondas en el espectro electromagnético tiene propiedades únicas que le permiten a las señales propagarse a través de la atmósfera bajo casi cualquier condición climática, ésta es la razón por la cual los ...
Actualment hi ha un ús creixent de dispositius mòbils i de la necessitat d’informació i, per això, cada vegada es necessiten sistemes sense fils amb majors velocitats de dades i més amplada de banda. A més, els sistemes ...
This thesis presents the development and assessment of imaging techniques in the millimeterwave (mmW) and terahertz frequency bands. In the first part of the thesis, the development of a 94 GHz passive screener based on a ...
From the perspective of increasingly data rate requirements in mobile communications, it is deemed necessary to do further research so that the future goals can be reached. To that end, the radio-based communications are ...
Massive antenna architectures and millimeter-wave bands appear on the horizon as the enabling technologies of future broadband wireless links, promising unprecedented spectral efficiency and data rates. In the recently ...
Se desarrolla un tratamiento unificado para la síntesis y la modelación de este tipo de reguladores que facilita y sistematiza el diseño de los mismos. Su síntesis permite explicar la existencia de realizaciones ya conocidas ...
