Exploració per autor "Svaluto Moreolo, Michela"

Ara es mostren els items 1-12 de 12

    • Data plane elements for optical performance monitoring agnostic to the modulation format for disaggregated optical networks 

      Fàbrega Sánchez, Josep Maria; Locatelli, Fabiano; Nadal Reixats, Laia; Christodoulopoulos, Konstantinos; Svaluto Moreolo, Michela; Spadaro, Salvatore (2020)
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      In this paper, data plane alternatives for optical performance monitoring are presented as enablers to address the key challenges in disaggregated optical networks. In fact, a key element of the disaggregated networks is ...

    • Decomposed radio access network over deployed passive optical networks using coherent optical OFDM transceivers 

      Fàbrega Sánchez, Josep Maria; Svaluto Moreolo, Michela; Chochol, Marcin; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2013-04-04)
      Article
      Accés restringit per política de l'editorial
      In this paper, it is proposed to take advantage of the deployed passive optical network (PON) infrastructure by overlaying a decomposed radio access network (RAN) using a very dense WDM. Coherent optical orthogonal ...

    • Experimental demonstration of a machine learning-based in-band OSNR estimator from optical spectra 

      Locatelli, Fabiano; Christodoulopoulos, Konstantinos; Fàbrega, Josep Maria; Svaluto Moreolo, Michela; Nadal, Laia; Spadaro, Salvatore (2020)
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      Channel spectral monitors are becoming a cost effective solution to improve the management, resiliency and efficiency of next generation optical transport networks. We experimentally demonstrate a ...

    • Filter features extraction from optical spectra 

      Locatelli, Fabiano; Christodoulopoulos, Konstantinos; Fàbrega Sánchez, Josep Maria; Svaluto Moreolo, Michela; Nadal Reixats, Laia; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2020)
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      We propose a method to estimate the central frequency and the bandwidth of optical filters, that relies on optical spectra captured with optical channel monitors at ROADM’s ingress port. We demonstrate for both features ...

    • Low complexity bit rate variable transponders based on optical OFDM with PAPR reduction capabilities 

      Nadal, Laia; Svaluto Moreolo, Michela; Fàbrega Sánchez, Josep Maria; Junyent Giralt, Gabriel (2012)
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      In this paper, we propose low complexity bit rate variable transponders for adaptive DC biased Optical OFDM systems. The transponders are based on an alternative transform, the fast Hartley transform (FHT), and use ...

    • Low complexity PAPR reduction techniques for clipping and quantization noise mitigation in direct-detection O-OFDM systems 

      Nadal Reixats, Laia; Svaluto Moreolo, Michela; Fàbrega Sánchez, Josep Maria; Junyent Giralt, Gabriel (2014-06-01)
      Article
      Accés restringit per política de l'editorial
      We present different distortionless peak-to-average power ratio (PAPR) reduction techniques that can be easily applied, without any symmetry restriction, in direct-detection (DD) optical orthogonal frequency division ...

    • Machine learning-based in-band OSNR estimation from optical spectra 

      Locatelli, Fabiano; Christodoulopoulos, Konstantinos; Svaluto Moreolo, Michela; Fàbrega, Josep Maria; Spadaro, Salvatore (2019-12-15)
      Article
      Accés obert
      Measuring the optical signal to noise ratio (OSNR) at certain network points is essential for failure handling, for single connection but also global network optimization. Estimating OSNR is inherently difficult in dense ...

    • Novel power efficient optical OFDM based on Hartley transform for intensity-modulated direct-detection systems 

      Svaluto Moreolo, Michela; Muoz, R.; Junyent Giralt, Gabriel (2010-03)
      Article
      Accés obert
      We present a novel optical orthogonal frequency division multiplexing (O-OFDM) scheme, suitable for intensity-modulated direct-detection systems, where the modulation/demodulation processing takes advantage of the fast ...

    • Optical filter cascading effects in a phase modulated coherent optical OFDM transmission system based on Hartley transform 

      Chochol, M.; Fàbrega Sánchez, Josep Maria; Svaluto Moreolo, Michela; Junyent Giralt, Gabriel (IEEE, 2012)
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      Effects of cascading optical filters are investigated for a phase modulated coherent optical OFDM system based on Hartley transform. The evaluation is performed by means of numeric simulations in a 10 Gb/s system with a ...

    • Phase modulated optical OFDM upstream with IM/DD downstream for full-duplex 10 Gb/s bidirectional transmission over a single wavelength with a reflective SOA 

      Fàbrega Sánchez, Josep Maria; Chochol, Marcin; Svaluto Moreolo, Michela; Lázaro Villa, José Antonio; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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      The feasibility of a phase modulated optical OFDM upstream transmission employing IM/DD downstream for achieving a bidirectional transmission with symmetric data rate of 10 Gb/s over a single wavelength is investigated for ...

    • Spectral processing techniques for efficient monitoring in optical networks 

      Locatelli, Fabiano; Christodoulopoulos, Konstantinos; Svaluto Moreolo, Michela; Fàbrega Sánchez, Josep Maria; Nadal Reixats, Laia; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2021-07-01)
      Article
      Accés obert
      Having ubiquitous optical monitors in dense wavelength-division multiplexing (DWDM) or flex-grid networks allows the estimation in real time of crucial parameters. Such monitoring would be even more important in disaggregated ...

    • WDM overlay of distributed base stations in deployed passive optical networks using coherent optical OFDM transceivers 

      Fàbrega Sánchez, Josep Maria; Svaluto Moreolo, Michela; Chochol, M.; Junyent Giralt, Gabriel (IEEE, 2012)
      Text en actes de congrés
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      It is proposed to reuse the deployed PON infrastructure by overlaying distributed radio base stations by means of very dense WDM with narrow channel spacings. In order to cope with that while minimizing its impact onto ...