Now showing items 339-345 of 345

    Virtual network provisioning over flexible optical transport infrastructure 

    Pagès Cruz, Albert (Date of defense: 2014-12-16)

    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 ...

    Visual object analysis using regions and local features 

    Ventura Royo, Carles (Date of defense: 2016-07-08)

    The first part of this dissertation focuses on an analysis of the spatial context in semantic image segmentation. First, we review how spatial context has been tackled in the literature by local features and spatial ...

    Voice source characterization for prosodic and spectral manipulation 

    Pérez Mayos, Javier (Date of defense: 2012-07-03)

    The objective of this dissertation is to study and develop techniques to decompose the speech signal into its two main components: voice source and vocal tract. Our main efforts are on the glottal pulse analysis and ...

    WDM/TDM PON bidirectional networks single-fiber/wavelength RSOA-based ONUs layer 1/2 optimization 

    López Pastor, Eduardo Tommy (Date of defense: 2013-09-12)

    This Thesis proposes the design and the optimization of a hybrid WDM/TDM PON at the L1 (PHY) and L2 (MAC) layers, in terms of minimum deployment cost and enhanced performance for Greenfield NGPON. The particular case of ...

    Wideband cognitive radio: monitoring, detection and sparse noise subspace communication 

    Font Segura, Josep (Date of defense: 2014-07-24)

    We are surrounded by electronic devices that take advantage of wireless technologies, from our computer mice, which require little amounts of information, to our cellphones, which demand increasingly higher data rates. ...

    Wireless sensors embedded in high permittivity lossy media 

    González López, Giselle (Date of defense: 2021-06-29)

    The design of wireless sensors for operation embedded in a medium with high losses creates a series of additional constraints that should be taken into consideration at design stage to enhance sensor performance. In such ...

    Zero-touch service orchestration in 5G and beyond mobile networks 

    Dalgkitsis, Anestis (Date of defense: 2023-11-07)

    (English) The expeditious growth and development of Beyond-5G and 6G networks inaugurated a new sector in the research of cellular networking. Automation and scaling are now considered a necessity to cope with the anticipated ...