Browsing by Subject "Telecomunicació de banda ampla, Sistemes de"
Now showing items 21-40 of 175
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Assessment of direct positioning for IR-UWB in IEEE 802.15.4a channels
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Conference report
Restricted access - publisher's policyThis paper assesses the problem of localization in IR-UWB under realistic channel models for Direct Position Estimation (DPE) approaches. DPE schemes have been proposed for positioning and localization for well developed ... -
Bandwidth extension of narrowband speech
(Universidad Politécnica de Valencia, 2014)
Conference report
Open AccessRecently, 4G mobile phone systems have been designed to process wideband speech signals whose sampling frequency is 16 kHz. However, most part of mobile and classical phone network, and current 3G mobile phones, still ... -
Bandwidth reduction for remote navigation systems through view prediction and progressive transmission
(Elsevier Science Direct, 2004)
Article
Restricted access - publisher's policyRemote navigation systems, such as exploration of virtual 3D worlds or remote surgery, usually require higher bandwidth than the Internet connection commonly available at home. In this paper,we explore a set of techniques ... -
Breast cancer detection using machine learning with thermograms in an edge computing scenario
(Association for Computing Machinery (ACM), 2021)
Conference lecture
Restricted access - publisher's policyThe second cause of death in the world is cancer. Although breast cancer is the more common cause of death among women, the chance of survival can be increased by detecting cancer in the early stages. For this aim, there ... -
Broadband services virtual operator for bitstream open-access networks: business case and infrastructure
(Universitat Politècnica de Catalunya, 2011-05-09)
Master thesis
Open AccessThe aim of this thesis is to study the technical and business model for the creation of a virtual operator for bitstream access networks in Catalonia, in the modality of carrier’s carrier. The substrate for this project ... -
BwMan: bandwidth manager for elastic services in the cloud
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference report
Restricted access - publisher's policyThe flexibility of Cloud computing allows elastic services to adapt to changes in workload patterns in order to achieve desired Service Level Objectives (SLOs) at a reduced cost. Typically, the service adapts to changes ... -
Carrier phase synchronisation scheme for very long baseline coherent arrays
(Institution of Electrical Engineers, 2012-07-19)
Article
Restricted access - publisher's policyProposed is a new carrier phase synchronisation scheme used to provide a stable phase reference to a very distant station. Channel induced phase fluctuations are characterised and compensated for with a round-trip loop ... -
Characterization, design and re-optimization on multi-layer optical networks
(Universitat Politècnica de Catalunya, 2012-12-21)
Doctoral thesis
Open AccessL'augment de volum de tràfic IP provocat per l'increment de serveis multimèdia com HDTV o vídeo conferència planteja nous reptes als operadors de xarxa per tal de proveir transmissió de dades eficient. Tot i que les xarxes ... -
Circular polarized 60 GHz antennas
(Universitat Politècnica de Catalunya, 2010-04-01)
Bachelor thesis
Open Access -
Code design for TDOA UWB based positioning of multiple sources
(Universitat Politècnica de Catalunya, 2010-08-25)
Master thesis (pre-Bologna period)
Open AccessIn this thesis we study the feasibility of obtaining acceptable variance values in TDOA UWB based positioning of multiple sources. We define the conditions a time-hopping code must satisfy to mitigate multi-user interference. ... -
Constant false alarm rate control for frequency hopping spread spectrum systems
(Institute of Electrical and Electronics Engineers (IEEE), 1989)
Conference report
Restricted access - publisher's policyA control scheme suited for setting the false alarm rate to a fixed value in Frequency-Hopping Spread-Spectrum Communications is proposed. The scheme performance is determined in the presence of a partial band interference. ... -
Constant-gain envelope tracking in a UHF outphasing transmitter based on continuousmode class-E GaN HEMT PAs
(Institute of Electrical and Electronics Engineers (IEEE), 2016)
Conference report
Restricted access - publisher's policyA UHF outphasing transmitter, based on continuous-mode class-E power amplifiers (PAs) and implementing a constant-gain envelope tracking (ET) strategy, is presented in this paper. Drain terminating and biasing networks are ... -
Contribución a la gestión dinámica de recursos aplicada al control de fuentes de vídeo de velocidad variable en la red digital de servicios integrados de banda ancha
(Universitat Politècnica de Catalunya, 1996-11-19)
Doctoral thesis
Open AccessEn esta tesis se trata el problema de integración de servicios en redes ATM. En particular, el trabajo se centra en los servicios que incorporan información de vídeo digital.<br/>La tesis se compone en cinco capítulos. El ... -
Contribución al modelado y caracterización de nodos en redes de banda ancha. Aplicación al multiplexor inverso ATM.
(Universitat Politècnica de Catalunya, 2000-01-21)
Doctoral thesis
Open AccessEl acceso a las redes ATM y el dimensionado de sus recursos son cuestiones clave ya que cada vez hay una mayor demanda de ancho de banda por parte de los usuarios. Sin embargo, se necesitan alternativas económicamente ... -
Contributions based on cross-layer design for quality-of-service provisioning over DVB-S2/RCS broadband satellite system
(Universitat Politècnica de Catalunya, 2013-03-21)
Doctoral thesis
Open AccessContributions based on cross-layer design for Quality-of-Service provisioning over DVB-S2/RCS Broadband Satellite Systems Nowadays, geostationary (GEO) satellite infrastructure plays a crucial role for the provisioning of ... -
Contributions to channel modelling and performance estimation of HAPS-based communication systems regarding IEEE Std 802.16TM
(Universitat Politècnica de Catalunya, 2011-10-24)
Doctoral thesis
Open AccessNew and future telecommunication networks are and will be broadband type. The existing terrestrial and space radio communication infrastructures might be supplemented by new wireless networks that make and will make use ... -
Cooperative localization algorithms in ultra-wideband systems for indoor positioning
(Universitat Politècnica de Catalunya, 2013-02-13)
Master thesis (pre-Bologna period)
Open Access
Covenantee: Kungliga Tekniska högskolan[ANGLÈS] Indoor positioning has become an important research field in recent years. This is due to the potential services or products that can be offered, which would be very useful for users in several applications, and ... -
Cooperative precoding for multi-user visible light communications with imperfect channel knowledge
(Universitat Politècnica de Catalunya, 2018-07-02)
Bachelor thesis
Restricted access - confidentiality agreement -
D13.1 Fundamental issues on energy- and bandwidth-efficient communications and networking
(2014-03)
Research report
Open AccessThe report presents the current status in the research area of energy- and bandwidth-efficient communications and networking and highlights the fundamental issues still open for further investigation. Furthermore, the ... -
D13.2 Techniques and performance analysis on energy- and bandwidth-efficient communications and networking
(2014-10)
Research report
Open AccessThe report presents the status of the research work of the various Joint Research Activities (JRA) in WP1.3 and the results that were developed up to the second year of the project. For each activity there is a description, ...
