Browsing by Subject "Telecommunication systems"

Now showing items 1-20 of 99

    • A centrality-based topology control protocol for wireless mesh networks 

      Vázquez Rodas, Andrés; Cruz Llopis, Luis Javier de la (Elsevier, 2015-01-01)
      Article
      Open Access
      Nodes in wireless multi-hop networks establish links with their neighbors, which are used for data transmission. In general, in this kind of networks every node has the possibility of acting as a router, forwarding the ...

    • A comparative study of impairments aware optical networks planning tools 

      Azodolmolky, Siamak; Angelou, Marianna; Tomkos, Ioannis; Morea, Annalisa; Pointurier, Yvan; Solé Pareta, Josep (2010)
      Conference report
      Open Access
      Transparent and translucent optical networks are widely considered as the prime candidates for the core network technology of the future. These networks provide ultra high speed end-to-end connectivity with high quality ...

    • A performance lower bound for quadratic timing recovery accounting for the symbol transition density 

      Riba Sagarra, Jaume (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-11-30)
      Article
      Open Access
      The symbol transition density in a digitally modulated signal affects the performance of practical synchronization schemes designed for timing recovery. This paper focuses on the derivation of simple performance limits for ...

    • A practical approach to the operation of telecommunication services driven by the TMF eTOM Framework 

      Jiejin, Hou (Universitat Politècnica de Catalunya, 2009-09-04)
      Master thesis
      Open Access
      Nowadays, the gap between data communications and telecommunications disappears rapidly, which leads to augment of the complexity and size of supporting networks. This calls for the software developers to embrace a new ...

    • A Spectrum selection framework for opportunistic networks 

      Moessner, Klaus; Pérez Romero, Jordi; Sallent Roig, José Oriol; Bouali, Faouzi; Sarvanko, Heli; Mustonen, Miia; Matinmikko, Marja; Lee, Haeyoung; Vahid, Seiamak (IIMC International Information Management Corporation Ltd, 2012)
      Conference lecture
      Open Access
      This paper presents a framework for including cognitive management functionalities in the spectrum selection process for Opportunistic Networks (ONs).The framework is based on a decision making functionality interacting ...

    • Adaptive optics without wave-front sensor using the APHEFIS (Adaptive Optics by Phase Estimation from Focal Intensity Speckles) algorithm 

      Muñoz Fuentes, Manuel (Universitat Politècnica de Catalunya, 2012-07-19)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] Compensation of the distorsions introduced to the optical wavefronts by the atmosphere using the algorithm APHEFIS, developed by Dr. Dirk Giggenbach.

    • An analytical model for multi-tenant radio access networks supporting guaranteed bit rate services 

      Vilà Muñoz, Irene; Sallent Roig, José Oriol; Umbert Juliana, Anna; Pérez Romero, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2019-01-01)
      Article
      Open Access
      Network slicing is a key feature of forthcoming fifth generation (5G) systems to facilitate the partitioning of the network into multiple logical networks customized according to different business and application needs. ...

    • Analysis of soil moisture impact on underground measurements 

      Abella Agelet, Enric (Universitat Politècnica de Catalunya, 2020-07)
      Bachelor thesis
      12 months embargo
      Technology is taking steps forward on transmitting data over a network without requiring human-to-human or human-to-computer interaction, which is known as Internet of Things (IoT). This thesis is focused on implementing ...

    • Analysis of techniques for traffic optimization over satellite backhauling links 

      González Polo, Alvaro (Universitat Politècnica de Catalunya, 2013-10-21)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] In certain situations the operation of mobile operator infrastructure can be affected by natural disasters such as hurricanes, fires or earthquakes. This fact hinders optimum coordination of rescue actions and ...

    • Analysis of the NB-IoT technology towards massive machine type communication 

      Serra i Lidón, Pol (Universitat Politècnica de Catalunya, 2018-02)
      Bachelor thesis
      Open Access
      Covenantee:   Università degli studi di Roma "La Sapienza"
      The Internet of Things (IoT), is going to redefine the way people interact with each other and with the objects that surround them. Within the IoT scope, LPWA radio technologies have emerged as a solution for the design ...

    • Análisis del sincronismo de portadora mediante series de Volterra 

      Agustí Comes, Ramon; Junyent Giralt, Gabriel (1980)
      Conference report
      Open Access
      Computing the exact carrier phase-jitter delivered from the recovery circuit in a QPSK-TDMA satellite system is cumbersome and has not been sufficiently investigated due to the analytical difficulties with the non linearities. ...

    • ASCETiC: adapting service lifeCycle towards efficienT clouds 

      Juan Ferrer, Ana; Garcia Perez, David; Agiatzidou, Eleni; Lordan Gomis, Francesc-Josep; Ejarque, Jorge; Sirvent, Raul; Badia Sala, Rosa Maria; Guitart Fernández, Jordi; Ortiz, David; Macías Lloret, Mario; Deprez, Jean-Christophe; Ponsard, Christophe; Temporale, Christian; Panuccio, Pasquale; Sommacampagna, Davide; Blasi, Lorenzo; Djemame, Karim; Armstrong, Django; Kammer, Michael (SCITEPRESS, 2014-04)
      Part of book or chapter of book
      Restricted access - publisher's policy
      Reducing energy consumption is increasingly gaining attention in the area of Cloud computing, as means to reduce costs and improve corporate sustainability image. ASCETiC is focused on providing novel methods and tools to ...

    • Assembly verification integration and testing of the payload and communications system of the 3CAT-4 cubesat 

      Gonga Siles, Amadeu (Universitat Politècnica de Catalunya, 2020-09)
      Bachelor thesis
      Open Access
      Los nanosatélites han experimentado un importante crecimiento en estos últimos años desde que fueron estandarizados en 2000. El UPC-NanoSat Lab, que se encuentra en el Campus Nord de la Universidad Politécnica de Cataluña, ...

    • Automated issue detection in operational ATN/VDL mode 2 Networks 

      Altisent Álvarez, Francesc (Universitat Politècnica de Catalunya, 2009-07)
      Master thesis
      Restricted access - confidentiality agreement

    • Autonomous receiver: symbol-rate and modulation classification algorithms 

      Blasco Moreno, Pol (Universitat Politècnica de Catalunya, 2009-03-04)
      Master thesis (pre-Bologna period)
      Open Access

    • Baetulo XXI: Sistemes de telecomunicació 

      León, Rafael; Medina, Fernando; Pérez, Carla; Pérez, Marta; Didac, Micola (2008-03-07)
      Audiovisual
      Open Access

    • Blind channel estimation and data detection using hidden Markov models theory 

      Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-01-01)
      Article
      Open Access
      In this correspondence, we propose applying the hidden Markov models (HMM) theory to the problem of blind channel estimation and data detection. The Baum–Welch (BW) algorithm, which is able to estimate all the parameters ...

    • Calidad en el servicio de las operadoras de Telecomunicaciones en su red fija 

      García Vernet, Joaquín Antonio (Universitat Politècnica de Catalunya, 2017-03)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Accomplishment of a study on the quality the different operators. Systems that have someone of these operators to control and to manage your ratios of quality. Offer of indicators to following for the improvement the ...

    • Capacity analysis of index modulations over spatial, polarization and frequency dimensions 

      Henarejos Hernández, Pol; Pérez Neira, Ana Isabel (2017-08-23)
      Article
      Open Access
      IEEE Determining the capacity of a modulation scheme is a fundamental topic of interest. Index Modulations (IM), such as Spatial Modulation (SMod), Polarized Modulation (PMod) or Frequency Index Modulation (FMod), are ...

    • Demonstrating communication services based on autonomic self-organization 

      Bernadas Zurdo, Albano (Universitat Politècnica de Catalunya, 2013-12)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] This thesis analyses the applicability of autonomic and self-organization capabilities in the execution of ICT services in distributed environments. Autonomicity is one of the key technologies able to address such ...