Ara es mostren els items 1-20 de 23

    • Accurate low complex modulation format and symbol rate identification for autonomous lightpath operation 

      Sequeira, Diogo Gonçalo; Ruiz Ramírez, Marc; Costa, Nelson; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (2022-11-28)
      Article
      Accés obert
      Network automation promises to reduce costs while guaranteeing the required performance; this is paramount when dealing with the forecasted highly dynamic traffic that will be generated by new 5G/6G applications. In optical ...
    • Analysis of back-propagation and RF pilot-tone based nonlinearity compensation for a 9x224Gb/s POLMUX-16QAM system 

      Díaz Souto, Alberto; Napoli, Antonio; Adhikari, Susmita; Maalej, Zied; Lobato Polo, Adriana P.; Kuschnerov, Maxim; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We investigate the joint implementation of back-propagation and RF-pilot tone for fiber nonlinear compensation in POLMUX-16QAM and show that the nonlinear tolerance is drastically improved when compared to OFDM system
    • Autonomous and energy efficient lightpath operation based on digital subcarrier multiplexing 

      Velasco Esteban, Luis Domingo; Barzegar, Sima; Sequeira, Diogo Gonçalo; Ferrari, Alessio; Costa, Nelson; Curri, Vittorio; Pedro, João; Napoli, Antonio; Ruiz Ramírez, Marc (2021-09)
      Article
      Accés obert
      The massive deployment of 5G and beyond will require high capacity and low latency connectivity services, so network operators will have either to overprovision capacity in their transport networks or to upgrade the optical ...
    • Comparison of single carrier and OFDM with back-propagation and RF pilot tone for a 9x224Gb/s POLMUX-16QAM system 

      Prat Gomà, Josep Joan; Díaz Souto, Alberto; Maalej, Z.; Lobato, A.; Adhikari, Sukumar Das; Timmers, E.; Napoli, Antonio; Kuschnerov, M.; Spinnler, B. (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The performance of single carrier and OFDM is compared when nonlinear compensation at the DSP receiver is employed. We show that the joint use of RF-pilot and back-propagation adds further improvement to OFDM performance.
    • Degradation detection and severity estimation by exploiting an optical time and frequency digital twin 

      Devigili, Mariano; Ruiz Ramírez, Marc; Barzegar, Sima; Costa, Nelson; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
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      We exploit the intrinsic advantages of a time and frequency domain digital twin to detect degradations and to estimate their severity. Noticeable performance shown for filter failures confirms the usefulness of this approach.
    • 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 ...
    • Dual time and frequency domain optical layer digital twin 

      Devigili, Mariano; Ruiz Ramírez, Marc; Costa, Nelson; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      We demonstrate a digital twin for failure detection in optical networks. Artificial neural networks-based models for optical constellation analysis enable predicting the transmitted signal in the time domain whereas ...
    • Dynamic and efficient point-to-point and point-to-multipoint communications by slicing the optical constellation 

      Iqbal, Masab; Ruiz Ramírez, Marc; Costa, Nelson; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Comunicació de congrés
      Accés obert
      Optical Constellation Slicing is proposed to convey heterogenous traffic from a source to multiple destinations, while supporting dynamic capacity allocation. Illustrative numerical results reveal the potential of the ...
    • Dynamic subcarrier allocation for multipoint-to-point optical connectivity 

      Shakespear Miles, Hailey Josephine; Ruiz Ramírez, Marc; Napoli, Antonio; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
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      A mathematical programming model is proposed to dynamically allocate subcarriers in the upstream direction of point-to-multipoint connections based on Digital Subcarrier Multiplexing. Numerical results show significant ...
    • Experimental demonstration of multi-vendor and multi-domain elastic optical network with data and control interoperability over a pan-european test-bed 

      González de Dios, Oscar; Casellas Regi, Ramón; Paolucci, Francesco; Napoli, Antonio; Gifre Renom, Lluís; Dupas, Arnaud; Hugues Salas, Emilio; Morro, Roberto; Belotti, Sergio; Meloni, Gianluca; Rahman, Talha; López Álvarez, Victor; Martínez Rivera, Ricardo Victor; Fresi, Francesco; Bohn, Marc; Yan, Shuangyi; Velasco Esteban, Luis Domingo; Layec, Patricia; Fernández Palacios, Juan Pedro (2016-04-01)
      Article
      Accés obert
      The operation of multidomain and multivendor EONs can be achieved by interoperable sliceable bandwidth variable transponders (S-BVTs), a GMPLS/BGP-LS-based control plane, and a planning tool. The control plane is extended ...
    • Experimental validation of deep learning-based models for optical time domain analysis 

      Devigili, Mariano; Sequeira, Diogo Gonçalo; Santos, Caio; Ruiz Ramírez, Marc; Shariati, Mohammad Behnam; Costa, Nelson; Napoli, Antonio; Fischer, Johannes Karl; Pedro, João; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Comunicació de congrés
      Accés obert
      Optical constellations generated by Deep Learning models trained with datasets generated through simulation are compared to experimentally collected ones. The obtained high accuracy enables its application for optical time ...
    • Extending the OCATA digital twin to the frequency domain 

      Devigili, Mariano; Ruiz Ramírez, Marc; Costa, Nelson; Castro, Carlos; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Text en actes de congrés
      Accés obert
      We extend the OCATA time domain digital twin to the frequency domain. It is shown that deep learning-based models enable to predict the linear and nonlinear impairments affecting the optical constellations, whereas analytical ...
    • Investigating imperfect cloning for extending quantum communication capabilities 

      Iqbal, Masab; Velasco Esteban, Luis Domingo; Costa, Nelson; Napoli, Antonio; Pedro, João; Ruiz Ramírez, Marc (Multidisciplinary Digital Publishing Institute (MDPI), 2023-09-14)
      Article
      Accés obert
      Quantum computing allows the implementation of powerful algorithms with enormous computing capabilities and promises a secure quantum Internet. Despite the advantages brought by quantum communication, certain communication ...
    • Lightweight optical constellation modeling by concatenating artificial neural networks 

      Sequeira, Diogo Gonçalo; Ruiz Ramírez, Marc; Costa, Nelson; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      A lightweight optical constellations modeling method based on concatenating ANNs is proposed. Statistical validation of the reproduced constellations is shown. The method accelerates data generation and facilitates detecting ...
    • LPsec: a fast and secure cryptographic system for optical connections 

      Iqbal, Masab; Velasco Esteban, Luis Domingo; Costa, Nelson; Napoli, Antonio; Pedro, João; Ruiz Ramírez, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2022-04)
      Article
      Accés obert
      High capacity and low latency of optical connections are ideal for supporting current and future communication services, including 5G and beyond. Although some of those services are already secured at the packet layer using ...
    • Multi-agent-based dynamic optical subcarrier allocation for near real-time P2MP operation 

      Shakespear Miles, Hailey Josephine; Ruiz Ramírez, Marc; Napoli, Antonio; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      We propose a multi-agent system (MAS) to manage subcarrier allocation in point-to-multipoint connectivity based on Digital Subcarrier Multiplexing. Similar performance to a centralized approach is shown, which allows for ...
    • OCATA: A deep-learning-based digital twin for the optical time domain 

      Sequeira, Diogo Gonçalo; Ruiz Ramírez, Marc; Costa, Nelson; Napoli, Antonio; Pedro, João; Velasco Esteban, Luis Domingo (Optical Society of American (OSA), 2023-02-01)
      Article
      Accés obert
      The development of digital twins to represent the optical transport network might enable multiple applications for network operation, including automation and fault management. In this work, we propose a deep-learning-based ...
    • Quantum bit retransmission using universal quantum copying machine 

      Iqbal, Masab; Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Napoli, Antonio; Pedro, João; Costa, Nelson (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      Quantum internet, which is expected to be a combination of quantum and classical networks, promises to provide information-theoretic security for data exchange. Classical networks have well-established protocols for reliable ...
    • Soft-failure detection, localization, identification, and severity prediction by estimating QoT model input parameters 

      Barzegar, Sima; Ruiz Ramírez, Marc; Sgambelluri, Andrea; Cugini, Filippo; Napoli, Antonio; Velasco Esteban, Luis Domingo (2021-09)
      Article
      Accés obert
      The performance of optical devices can degrade because of aging and external causes like, for example, temperature variations. Such degradation might start with a low impact on the Quality of Transmission (QoT) of the ...
    • Soft-failure localization and device working parameters estimation in disaggregated scenarios 

      Barzegar, Sima; Virgillito, E.; Ruiz Ramírez, Marc; Ferrari, A.; Napoli, Antonio; Curri, Vittorio; Velasco Esteban, Luis Domingo (2020)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A soft-failure localization and key working parameters estimation system is proposed for network diagnosis and maintenance. We show that a double analysis of monitoring data and estimated working parameters ...