Departament de Teoria del Senyal i Comunicacions: Envíos recientes
Mostrando ítems 221-240 de 355
Face recognition by means of advanced contributions in machine learning
Face recognition (FR) has been extensively studied, due to both scientific fundamental challenges and current and potential applications where human identification is needed. FR systems have the benefits of their non ...
Ultrashort laser pulse measurement for multiphoton microscopy
In this thesis, we address specific efforts towards developing the precise aspect of ultrashort laser pulse measurement in the context of biomedical research. The motivation for pursuing these new developments was triggered ...
Nonlinear simulation and design of microwave, multi-device distributed autonomous circuits
It is widely believed that many drawbacks in today's wireless communication paradigm might be relieved by enabling high carrier frequency transmission, and endowing both the network and the user equipment with some degree ...
Micromachined polymer based components for highly integrated millimeterwave subsystems
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 ...
GNSS array-based acquisition: theory and implementation
This Dissertation addresses the signal acquisition problem using antenna arrays in the general framework of Global Navigation Satellite Systems (GNSS) receivers. The term GNSS classi es those navigation systems based on a ...
Concept design, analysis, and Integration of the new U.P.C. multispectral lidar system
The increasing need for range-resolved aerosol and water-vapour atmospheric observation networks worldwide has given rise to multi-spectral LIDARs (Light Detection and Ranging, a synonym of laser radar) as advanced remote ...
Feedback of channel state information in multi-antenna systems based on quantization of channel Gram matrices
This dissertation deals with the proper design of efficient feedback strategies for Multiple-Input Multiple-Output (MIMO) communication systems. MIMO systems outperform single antenna systems in terms of achievable throughput ...
Speaker diarization and tracking in multiple-sensor environments
This thesis verses about the research conducted in the topic of speaker recognition in real conditions like as meeting rooms, telephone quality speech and radio and TV broadcast news. The main objective is concerned to the ...
Proposal and evaluation of channel assignment algorithms for wireless local area networks with opportunistic spectrum acces capabilities
The growing need for wireless connectivity is pushing the massive adoption and usage of Wireless Local Area Networks (WLANs) based on the IEEE 802.11 standard (Wi-Fi), leading to dense deployments of individual, uncoordinated ...
Exponentiated weibull fading channel model in free-space optical communications under atmospheric turbulence
Free-space optical (FSO) communications is drawing increasing attention as a promising technology to overcome bandwidth shortage, of an evermore crowded wireless marketplace. Currently radio-frequency (RF) technology ...
GNSS-R as a source of opportunity for remote sensing of the cryosphere
This work evaluates the potential use of signals from the Global Navigation Satellite Systems (GNSS) that scatter off the Earth surface for the retrieval of geophysical information from the cryosphere. For this purpose, ...
Radio frequency interference in microwave radiometry: statistical analysis and study of techniques for detection and mitigation
Microwave radiometry field has been increasing its performance with higher accuracy measurements, leading to a more presence in the remote sensing field. Several space-borne, air-borne and ground-based radiometers have ...
Analysis and design of an edge-technique-based Doppler wind lidar: practical assessment of a laboratory prototype
This thesis is the initial stage in the development of a range-resolving Doppler wind lidar. Atmospheric lidars emit pulsed laser radiation that after being scattered by air molecules and suspended aerosol particles is ...
RFID multiantenna systems for wireless communications and sensing
Many scientific, industrial and medical applications require the measurement of different physical parameters in order to collect information about the spatially distributed status of some process. Very often this information ...
Application of network coding in satellite broadcast and multiple access channels
Satellite broadcasting and relaying capabilities enable mobile broadcast systems over wide geographical areas, which opens large market possibilities for handheld, vehicular and fixed user terminals. The geostationary (GEO) ...
A Bayesian approach to robust identification: application to fault detection
In the Control Engineering field, the so-called Robust Identification techniques deal with the problem of obtaining not only a nominal model of the plant, but also an estimate of the uncertainty associated to the nominal ...
GMPLS-based provisioning of ethernet connections over WSON with quality of service
The rapid growth of the data traffic, caused by the ever-growing number of Internet users and the services requiring huge bandwidth (e.g., videoconferences, IPTV, etc.) show that the existing transport network infrastructure ...
Articulated models for human motion analysis
Human motion analysis is as a broad area of computer vision that has strongly attracted the interest of researchers in the last decades. Motion analysis covers topics such as human motion tracking and estimation, action ...
Nonlinear mechanisms in passive microwave devices
The telecommunications industry follows a tendency towards smaller devices, higher power and higher frequency, which imply an increase on the complexity of the electronics involved. Moreover, there is a need for extended ...
Post-processing methods for ocean monitoring in sar images
In the recent years, a wide interest has been focused on research and development for the operational use of satellite remote sensing tools for Earth observation. Among different types of sensors, Synthetic Aperture Radars ...
