Enviaments recents

  • Grade of service in UDWDM-PON with statistical wavelength subscribing 

    Segarra Mullerat, Josep; Sales Zaragoza, Vicente; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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    The Grade of Service (GoS) or ONU rejection probability in coherent UDWDM-PONs with ONU lasers under limited tunability is evaluated. Each active ONU is assigned an exclusive wavelength channel, which is managed by heuristic ...
  • Exploratory analysis of superposition coding and rate splitting for multibeam satellite systems 

    Caus, Marius; Pastore, Adriano; Navarro Rodero, Mònica; Ramirez, Tomás; Mosquera Nartallo, Carlos; Noels, Nele; Alagha, Nader; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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    The adoption of aggressive frequency reuse schemes along with interference management techniques has become the leading paradigm in satellite communications to increase the spectral efficiency. In general terms, one cannot ...
  • Spectrally and spatially flexible optical networks: recent developments and findings 

    Shariati, Mohammad Behnam; Klonidis, Dimitrios; Marom, Dan M.; Comellas Colomé, Jaume; Velasco Esteban, Luis Domingo; Tomkos, Ioannis (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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    Space division multiplexing (SDM) has been proposed as the ultimate solution to address the capacity crunch of optical transport networks. The efficient utilization of SDM requires some forms of spatial integration which ...
  • 5G connected vehicles supported by optical fiber access 

    Lázaro Villa, José Antonio; Coves Garrido, Massiel; Sarmiento Hernández, Samael; Altabas, Jose Antonio; Lerin, Adolfo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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    Future autonomous vehicle will require a high level of computation, communication, sensing and fast response actuation. Communication among vehicles, and vehicles to infrastructure, accessing to remote systems and services ...
  • On-demand network slicing using SDN/NFV-enabled satellite ground segment systems 

    Ahmed, Toufik; Alleg, Abdelhamid; Ferrús Ferré, Ramón Antonio; Riggio, R. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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    This paper proposes an architecture framework for the realization of on-demand satellite network slicing that is built on the introduction of Software Defined Networking (SDN) and Network Function Virtualization (NFV) ...
  • Synthesis using speaker adaptation from speech recognition DB 

    Oller Moreno, Sergio; Moreno Bilbao, M. Asunción; Bonafonte Cávez, Antonio (Universidad de Vigo, 2010)
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    This paper deals with the creation of multiple voices from a Hidden Markov Model based speech synthesis system (HTS). More than 150 Catalan synthetic voices were built using Hidden Markov Models (HMM) and speaker adaptation ...
  • LaViCAD: Laboratorio Virtual de Comunicaciones Analógicas y Digitales 

    Cabrera-Bean, Margarita; Fernández Prades, Carles; Vargas Berzosa, Carlos; Vargas Berzosa, Francisco; Fernández Rubio, Juan Antonio; Gasull Llampallas, Antoni (Universitat de Barcelona. Edicions i Publicacions, 2006)
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    En este trabajo se presenta tanto el diseño como la experimentación de un Laboratorio Virtual de Comunicaciones Analógicas y Digitales: LaViCAD. Mediante LaViCAD se pueden experimentar y verificar diferentes aplicaciones ...
  • Optimal power control law for equal-rate DS-CDMA networks governed by a successive soft interference cancellation scheme 

    Molina Oliveras, Francesc; Sala Álvarez, José; Villares Piera, Nemesio J.; Rey Micolau, Francesc (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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    This paper studies the throughput maximization of a dense multiple access network of low-rate subscribers that share the same practical Forward Error Correction (FEC) code and modulation scheme, and transmit to a central ...
  • Digital pre-emphasis for 10Gb/s with low-cost directly phase-modulated lasers for PONs 

    Tabares Giraldo, Jeison; Napoli, Antonio; Polo Querol, Víctor; Calabro, S.; Sommerkorn-Krombholz, B.; Spinnler, B.; Prat Gomà, Josep Joan (Optical Society of American (OSA), 2018)
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    We apply digital pre-emphasis to compensate for the frequency response non-idealities of low-cost optical transmitters. It enables transmission beyond 10Gb/s with 2/4/8-DPSK using directly modulated lasers and coherent ...
  • Allocating multi-rate requests to single-rate lightpaths in Flexgrid optical networks 

    Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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    Some ideas about the effect of appropriately selecting the size of the connections conveyed by multi-rate flexgrid optical networks are discussed. The main focus is on illustrating the relation between spectrum consumption ...
  • A figure of merit to assess the performance of photoconductive antennas at terahertz band 

    Romeu Robert, Jordi; Cea Falcó, Marc de; Jofre Roca, Lluís; Yazgan, Ahmet Utku (Institute of Electrical and Electronics Engineers (IEEE), 2017)
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    Photoconductive antennas are one of the most efficient ways to radiate and receive EM waves around the 1 THz frequency band. The physical processes involved in photoconductive terahertz signal generation are complex enough ...
  • An anti-jamming system for GNSS timing applications 

    Querol Borràs, Jorge; Camps Carmona, Adriano José; Manfredini, E.G.; Píriz, R. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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    Radio-Frequency Interference (RFI) and jamming are increasing problems for timing applications based on Global Navigation Satellite Systems (GNSS). FENIX-lite is a real-time pre-correlation anti-jamming system designed to ...

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