Now showing items 260-279 of 345

    Quality evaluation of DInSAR results from the phase statistical analysis 

    Centolanza, Giuseppe (Date of defense: 2015-10-23)

    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 ...

    Quality of service, security and trustworthiness for network slices 

    Alemany Prats, Pol (Date of defense: 23-03-23)

    (English) The telecommunications' systems are becoming much more intelligent and dynamic due to the expansion of the multiple network types (i.e., wired, wireless, Internet of Things (IoT) and cloud-based networks). Due ...

    Quasi-perfect codes for the classical-quantum channel 

    Blasco Coll, Andreu (Date of defense: 2023-09-27)

    (English) Quantum computers use the laws of quantum mechanics to do complex operations that classical computers can't solve. Quantum computers and other physical quantum systems require quantum information to be completely ...

    Radiation pattern reconfigurable microfabricated planar millimeter-wave antennas 

    Balcells Ventura, Jordi (Date of defense: 2011-05-20)

    Els serveis de telecomunicacions i sistemes radar estan migrant a freqüències mil•limètriques (MMW), on es disposa d 'una major amplada de banda i conseqüentment d'una major velocitat de transmissió de dades. Aquesta ...

    Radio access network optimization with proactive resource management for 5G and beyond 

    Guerra Gómez, Rolando (Date of defense: 2023-05-19)

    (English) The Fifth-Generation (5G) of cellular networks significantly increases the performance and flexibility of the offered services to users and service providers. The strict network requirement of 5G use cases has ...

    Radio and computing resource management in SDR clouds 

    Gómez, Ismael (Date of defense: 2013-12-19)

    The aim of this thesis is defining and developing the concept of an efficient management of radio and computing resources in an SDR cloud. The SDR cloud breaks with today's cellular architecture. A set of distributed ...

    Radio frequency interference detection and mitigation techniques for navigation and Earth observation 

    Querol Borràs, Jorge (Date of defense: 2018-11-09)

    Radio-Frequency Interference (RFI) signals are undesired signals that degrade or disrupt the performance of a wireless receiver. RFI signals can be troublesome for any receiver, but they are especially threatening for ...

    Radio frequency interference in microwave radiometry: statistical analysis and study of techniques for detection and mitigation 

    Tarongí Bauzá, José Miguel (Date of defense: 2013-03-06)

    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 ...

    Radio resource management for V2X in cellular systems 

    Albonda, Haider Daami R. (Date of defense: 2020-07-21)

    The thesis focuses on the provision of cellular vehicle-to-everything (V2X) communications, which have attracted great interest for 5G due to the potential of improving traffic safety and enabling new services related to ...

    Radio resource management strategies for interference mitigation in 4G heterogeneous wireless networks 

    Koutlia, Aikaterini (Date of defense: 2016-05-18)

    The new era of mobile communications is dictated by the user demand for robust and high speed connections, data hungry applications and seamless connectivity. Operators and researchers all over the world are challenged to ...

    Radio resource management techniques for QoS provision in 5G networks 

    Datsika, Eftychia (Date of defense: 2018-11-26)

    As numerous mobile applications and over-the-top (OTT) services emerge and mobile Internet connectivity becomes ubiquitous, the provision of high quality of service (QoS) is more challenging for mobile network operators ...

    Randomized space-time block coding for the multiple-relay channel 

    Gregoratti, David (Date of defense: 2010-06-22)

    En la última década, la cooperación entre usuarios ha generado un gran interés por la posibilidad de mejorar la velocidad de transmisión en las redes de comunicaciones inalámbricas. El objetivo es formar un array con las ...

    Real-time digital signal processing for new wavelength-to-the-user optical access networks 

    Ghasemi, Saeed (Date of defense: 2019-10-31)

    Nowadays, optical access networks provide high capacity to end users with growing availability of multimedia contents that can be streamed to fixed or mobile devices. In this regard, one of the most flexible and low-cost ...

    Reconfigurable high efficiency class-F power amplifier using CMOS-MEMS technology 

    Gilasgar, Mitra (Date of defense: 2017-09-08)

    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 ...

    Reconfigurable pixel antennas for communications 

    Rodrigo López, Daniel (Date of defense: 2013-06-14)

    The explosive growth of wireless communications has brought new requirements in terms of compactness, mobility and multi-functionality that pushes antenna research. In this context, recon gurable antennas have gained a lot ...

    Redes de acceso UDWDM operadas con láseres aleatorios de sintonía limitada 

    Sales Zaragozá, Vicente (Date of defense: 2017-10-25)

    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 ...

    Region-based face detection, segmentation and tracking. framework definition and application to other objects 

    Vilaplana Besler, Verónica (Date of defense: 2010-12-17)

    One of the central problems in computer vision is the automatic recognition of object classes. In particular, the detection of the class of human faces is a problem that generates special interest due to the large number ...

    Region-based particle filter leveraged with a hierarchical co-clustering 

    Varas González, David (Date of defense: 2016-11-14)

    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 ...

    Relay-assited transmission and radio resource management for wireless networks 

    Agustín de Dios, Adrián (Date of defense: 2008-01-01)

    La transmisión asistida por relay o transmisión cooperativa es una nueva técnica de diversidad espacial donde aparece un elemento nuevo (un relay o un usuario cooperativo) en la tradicional transmisión punto a punto (fuente ...

    Remote sensing for atmospheric observation and wind energy: over-land boundary layer and off-shore atmospheric stability 

    Silva, Marcos Paulo Aráujo da (Date of defense: 2023-06-29)

    (English) Monitoring the atmospheric boundary layer (ABL) is a matter of interest for many applications, such as weather forecasting, pollutant-dispersion models and wind energy. The ABL is the most turbulent part of the ...