Departament de Teoria del Senyal i Comunicacions: Envíos recientes
Mostrando ítems 101-120 de 355
Cellular networks for smart grid communication
The next-generation electric power system, known as smart grid, relies on a robust and reliable underlying communication infrastructure to improve the efficiency of electricity distribution. Cellular networks, e.g., LTE/LTE-A ...
Deep learning for i-vector speaker and language recognition
Over the last few years, i-vectors have been the state-of-the-art technique in speaker and language recognition. Recent advances in Deep Learning (DL) technology have improved the quality of i-vectors but the DL techniques ...
Investigation of continuous-wave range-resolved lidar systems for gas detection and concentration measurement
The techniques for detection of the atmosphere constituents and their distribution in the space have evolved in the last years driven by needs in the environmental, meteorological and climate science fields and backed by ...
Design and stochastic analysis of emerging large-scale wireless-powered sensor networks
Undeniably, the progress in wireless networks during the last two decades is extraordinary. However, the ever-increasing upward trend in the numbers of wireless devices that will overwhelm every field of our everyday life, ...
Contribution to ground-based and UAV SAR systems for Earth observation
Mankind's way of life is the main driver of a planetary-scale change that is marked by the growing of human population's demand of energy, food, goods, services and information. As a result, it have emerged new ecological, ...
Contribution to advanced sensor development for passive imaging of the Earth
This work has been formally undertaken within the frame of the scholarship number BES-2012-053917 of 1 December 2012, by the "Secretario de Estado de Investigación del Ministerio de Economía y Competitividad" related to ...
Redes de acceso UDWDM operadas con láseres aleatorios de sintonía limitada
A new passive optical network (PON) for access, making use of ultra-dense wavelength division multiplexing (UDWDM) by densely spacing channels by a few gigahertz and introducing the "wavelength-to-the-user" concept, is ...
Discriminative features for GMM and i-vector based speaker diarization
Speaker diarization has received several research attentions over the last decade. Among the different domains of speaker diarization, diarization in meeting domain is the most challenging one. It usually contains spontaneous ...
Unsupervised learning for expressive speech synthesis
Nowadays, especially with the upswing of neural networks, speech synthesis is almost totally data driven. The goal of this thesis is to provide methods for automatic and unsupervised learning from data for expressive speech ...
Multivariate approach-based system for the automated interpretation of spectra : application to pigments identification through Raman spectroscopy in art analysis
The application of spectroscopic techniques is crucial for art historians and conservators who require knowledge of materials used in works of art (pigments, dyes, binders, additives, ...) in particular instances. In this ...
Reconfigurable high efficiency class-F power amplifier using CMOS-MEMS technology
The increasing demand for wireless products to be part of our daily lives brings the need for longer battery lifetime, smaller size and lower cost. To increase battery lifetime, high efficiency power amplifiers (PAs) are ...
Aplicaciones avanzadas del principio superregenerativo a comunicaciones por radiofrecuencia
There exists today an increasing demand for wireless devices which require low cost and minimum power consumption radiofrequency front-ends. Precisely, these are two remarkable characteristics of the superregenerative ...
Polarization and index modulations : a theoretical and practical perspective
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 ...
Estimation and control in energy harvesting wireless communication networks
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). ...
Energy efficient offloading techniques for heterogeneous networks
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
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
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
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
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
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 ...
