Departament de Teoria del Senyal i Comunicacions: Recent submissions
Now showing items 161-180 of 355
Quality evaluation of DInSAR results from the phase statistical analysis
The Earth is continuously monitored by sensors capable of providing diversified information about several phenomena. In particular Synthetic Aperture Radar (SAR) is able to observe the Earth in all-day and all-weather ...
Interferometric GNSS-R processing : modeling and analysis of advanced processing concepts for altimetry
This PhD dissertation is focused on the use of the opportunity signals from the Global Navigation Satellite Systems (GNSS), that scatter-off the Earth's surface for perform ocean mesoscale altimetry (the so called GNSS-R ...
Contributions to the determination of electromagnetic bias in Gnss-R altimetry
In this Ph. D. dissertation the electromagnetic bias in GNSS-R (Global Navigation Satellite Systems Reflectometry) altimetry has been studied. GNSS-R altimetry is a new type of system that uses navigation signals as signals ...
Multifunctional metamaterial designs for antenna applications
Over the last decades, Metamaterials (MTMs) have caught the attention of the scientific community. Metamaterials are basically artificially engineered materials which can provide unusual electromagnetic properties not ...
Atmospheric compensation experiments on free-space optical coherent communication systems
In the last years free-space optical communications systems for wireless links have been proposed, studied, and implemented mainly due to the higher bandwidth that this technology is able to provide. Still, radio frequency ...
Cognitive management frameworks and spectrum management strategies exploiting cognitive radio paradigm
Cognitive Radio (CR) paradigm represents an innovative solution to mitigate the spectrum scarcity problem by enabling Dynamic Spectrum Access (DSA), defined in order to conciliate the existing conflicts between the ...
Contribution to the optimization of 4G mobile communications by means of advanced carrier aggregation strategies
Mobile broadband subscriptions and data traffic have increasingly grown in the past years with the deployment of the 3G and 4G technologies and the massive use of mobile devices. In this sense, LTE-A has been presented as ...
Grapheme-to-phoneme conversion in the era of globalization
This thesis focuses on the phonetic transcription in the framework of text-to-speech conversion, especially on improving adaptability, reliability and multilingual support in the phonetic module. The language is constantly ...
Ground moving target indication with synthetic aperture radars for maritime surveillance
The explosive growth of shipping traffic all over the World, with around three quarters of the total trade goods and crude oil transported by sea, has raised newly emerging concerns (economical, ecological, social and ...
Contribution to the development of pico-satellites for Earth observation and technology demonstrators
The submitted Ph.D. thesis is a contribution to the development of pico-satellites and nano-satellites for Earth Observation and Technology Demonstrators. Development of satellites with a mass from 1 kg up to 10 kg has ...
Stochastic optimization and interactive machine learning for human motion analysis
The analysis of human motion from visual data is a central issue in the computer vision research community as it enables a wide range of applications and it still remains a challenging problem when dealing with unconstrained ...
Contributions to radio frequency interference detection and mitigation in Earth observation
Radio Frequency Interference (RFI) is the most common problem for electronic measuring systems. The presence of those electromagnetic waves can harm the measurements taken from very sensitive instruments, like microwave ...
Virtual network provisioning over flexible optical transport infrastructure
Current transport network owners are focused on offering services on top of the infrastructures they own, while end users have no control over them. Traditionally, this has been their business model, as the cost of building ...
Design of efficient microwave power amplifier systems
In the future communication systems, it is of key importance that the transceivers are capable of operating in multiple frequency bands and with complex signals. In this context, the power amplifier is a critical component ...
Geosynchronous synthetic aperture radar for Earth continuous observation missions
This thesis belongs to the field of remote sensing, particularly Synthetic Aperture Radar (SAR) systems from the space. These systems acquire the signals along the orbital track of one or more satellites where the transmitter ...
Design and implementation of low complexity adaptive optical OFDM systems for software-defined transmission in elastic optical networks
Due to the increasing global IP traffic and the exponential growing demand for broadband services, optical networks are experimenting significant changes. Advanced modulation formats are being implemented at the Digital ...
Self-managed resources in network virtualisation environments
Network virtualisation is a promising technique for dealing with the resistance of the Internet to architectural changes, enabling a novel business model in which infrastructure management is decoupled from service ...
Energy-efficient wireless communication schemes and real-time middleware for machine-to-machine networks
Esta tesis estudia sistemas Machine-to-Machine (M2M) en los que se ejecutan tareas de manera autónoma sin, o con mínima intervención humana. Los sistemas M2M están formados por dispositivos desplegados en un entorno que ...
Una contribución a la investigación de la espectroscopia Raman en el análisis de pigmentos : resultados teóricos y experimentales
Esta Tesis se ha enmarcado en un proyecto financiado por la CICYT gracias al cual se adquirió un equipo portátil de espectroscopia Raman con fibra óptica. Esto determinó el objetivo inicial de esta investigación, que ...
High-resolution deformation measurement using "Persistent Scatterer Interferometry"
Persistent Scatterer Interferometry (PSI) is a group of advanced differential interferometric SAR techniques that are used to measure and monitor terrain deformation. Different PSI techniques have been proposed in the last ...
