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Ara es mostren els items 32-51 de 115

    • Ecualización en banda base para sistemas de transmisión digital por fibra óptica a alta velocidad: estudio comparativo de diferentes criterios de diseño 

      Casadevall Palacio, Fernando José; Junyent Giralt, Gabriel (Unión Científica Internacional de Radio (URSI), 1983)
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      For data rates above 100Mb/s, multimode systems are generally modal dispersion rather than loss limited and some form of equalization is highly desired. We have investigated the performance of varius equalizers. Linear ...

    • Efficient spectrum assignment in elastic optical networks 

      Comellas Colomé, Jaume; Calzada Salvia, Xavier; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      The Elastic Optical Network (EON) architecture has been proposed in response to the large capacity and diverse traffic granularity needs of the future Internet. By breaking the fixed-grid spectrum allocation of WDM networks, ...

    • Egalisation no-lineaire en fibre optique a 140 et 560 Mbit/s 

      Junyent Giralt, Gabriel; Agustí Comes, Ramon; Casadevall Palacio, Fernando José (Institute of Electrical and Electronics Engineers (IEEE), 1982)
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      Dans cet article, on introduit un égaliseur non-linéaire du type récursif avec décision dans la boucle pour compenser les effets de l'interférence entre symboles qui est présente dans un système de transmission numérique ...

    • Electronic and photonic switching in the atm era 

      Masip, J; Solé Pareta, Josep; Junyent Giralt, Gabriel (1998-09)
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      Broadband networks require high-capacity switches in order to properly manage large amounts of traffic fluxes. Electronic and photonic technologies are being used to achieve this objective both allowing different multiplexing ...

    • Enhanced domain disjoint backward recursive TE path computation for PCE-based multi-domain networks 

      Hernández Sola, Guillem; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Velasco Esteban, Luis Domingo; Spadaro, Salvatore; Junyent Giralt, Gabriel (2011-04)
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      Accés restringit per política de l'editorial
      The ability of computing optimal routes poses new challenges when extending it to larger multi-domain network scenarios, as the quality of these computed endto-end inter-domain routes depends on the selection of the domain ...

    • Evaluación de las prestaciones de un receptor óptico coherente incluyendo ruido AM y FM 

      Ruiz Boqué, Sílvia; Junyent Giralt, Gabriel (Universidad Politécnica de Madrid (UPM), 1988)
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      In this paper an evaluation of the performance of a coherent optical receiver for binary PSK has been carried out by means of the signal to noise ratio and BER calculation. Both the AM and FM noise due to transmitter and ...

    • Examen Final 

      Gené Bernaus, Joan M.; Junyent Giralt, Gabriel (Universitat Politècnica de Catalunya, 2015-01-14)
      Examen
      Accés restringit a la comunitat UPC

    • Examen Final 

      Junyent Giralt, Gabriel; Gené Bernaus, Joan M. (Universitat Politècnica de Catalunya, 2014-01-09)
      Examen
      Accés restringit a la comunitat UPC

    • Examen Final 

      Gené Bernaus, Joan M.; Junyent Giralt, Gabriel (Universitat Politècnica de Catalunya, 2015-06-19)
      Examen
      Accés restringit a la comunitat UPC

    • Examen Final 

      Junyent Giralt, Gabriel; Soneira Ferrando, M. José; Gené Bernaus, Joan M. (Universitat Politècnica de Catalunya, 2016-06-02)
      Examen
      Accés restringit a la comunitat UPC

    • Experimental assessment of a high performance back-end PCE for Flexgrid optical network re-optimization 

      Gifre Renom, Lluís; Velasco Esteban, Luis Domingo; Navarro, Nacho; Junyent Giralt, Gabriel (The Optical Society (OSA), 2014)
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      A specialized high performance Graphics Processing Unit (GPU)-based back-end Path Computation Element (PCE) to compute re-optimization in Flexgrid networks is presented. Experimental results show 6x speedups compared to ...

    • Experimental assessment of an SDN-based control of OPS switching nodes for intra-data center interconnect 

      Agraz Bujan, Fernando; Miao, Wang; Ferrer Delgado, Alejandro; Bernini, Giacomo; Dorren, Harm; Calabretta, Nicola; Ciulli, Nicola; Perelló Muntan, Jordi; Peng, Shuping; Zervas, Georgios; Simeonidou, Dimitra; Junyent Giralt, Gabriel; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      An SDN-based control framework for OPS switches is experimentally assessed. The OpenFlow messages enabling control communication between SDN controller and OPS switch are validated. Dynamic OPS virtual network slices for ...

    • Experimental demonstration of Flex-Grid udWDM with 6.25GHz full-duplex frequency slots for metro/access & data centers 

      Altabas, Jose Antonio; Izquierdo, David; Sotelo, F; Garcés, I; Lázaro Villa, José Antonio; Lerín de la Santísima Trinidad, Adolfo; Spadaro, Salvatore; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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      Flex-Grid 6.25GHz full-duplex frequency slots are proposed for Metro/Access & Data-Center Networks allocating: 1Gbps Nyquist-DPSK over MZM for OLT/DC-ONU downlinks and OLT/DC up-downlinks; 1Gbps NRZ-DPSK over directly ...

    • Experimental demostration of an all-fiber polarization controller based on faraday rotation 

      Prat Gomà, Josep Joan; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (1995-12)
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      An all-fiber device for the control of the state of polarization (SOP) is presented. The controller is high speed (its time response is less than 50 ms in the worst case), low loss (insertion losses are 2.5 dB independently ...

    • Finding an objective cost for sliceable flexgrid transponders 

      Velasco Esteban, Luis Domingo; González de Dios, Óscar; López, Víctor; Fernández Palacios, Juan Pedro; Junyent Giralt, Gabriel (The Optical Society (OSA), 2014)
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      We analyze the objective cost of SBVTs as a function of the traffic conveyed by IP/MPLS-over-flexgrid networks. Optimal results show that cost increment with respect to BVTs is related to the aggregation level.

    • Flexible PON Key technologies: digital advanced modulation formats and devices 

      Lázaro Villa, José Antonio; Altabas, Jose Antonio; Vairavel, S.; Karthikeyan, Subburayan; Sridharan, Madanagurusamy; Garces, Ignacio; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      Flexible PON are future paradigm in parallel with flexible and elastic optical networks are under research for core networks. In the same way as those backbone optical networks can be significantly improved by following ...

    • Global concurrent optimization: advantages and opportunities in flexgrid-based networks 

      Castro Casales, Alberto; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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      In future flexgrid core networks the amount of lightpaths might increase significantly as a consequence of the finer granularity in the use of the optical spectrum. Different spectrum bandwidth can be allocated to each ...

    • GMPLS control plane network design with resilience guarantees 

      Ruiz Ramírez, Marc; Perelló Muntan, Jordi; Velasco Esteban, Luis Domingo; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2011-01-01)
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      Accés restringit per política de l'editorial
      A one-to-one association between data and control channels has traditionally existed in transport networks. Being the control plane embedded in the data plane, the design of the former, as well as its resilience, has been ...

    • GMPLS-based multidomain restoration: analysis, strategies, policies and experimental assessment 

      Velasco Esteban, Luis Domingo; Agraz Bujan, Fernando; Martínez, Ricardo; Casellas, Ramon; Spadaro, Salvatore; Muñoz, Raul; Junyent Giralt, Gabriel (IEEE Press. Institute of Electrical and Electronics Engineers, 2010-07-01)
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      Accés restringit per política de l'editorial
      A connection spanning, for example, several countries crosses multiple optical backbone networks, each one controlled by different administrators or operators. In this context, the interworking of these networks is thus ...

    • High saturation in a nonlinear optical amplifier 

      Ruiz Moreno, Sergio; Junyent Giralt, Gabriel; Soneira Ferrando, M. José (1987)
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