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Flexible Optical Networks – Time Domain Hybrid QAM: DSP and Physical Layer Modelling

Total Cost €


EC-Contrib. €






 Flex-ON project word cloud

Explore the words cloud of the Flex-ON project. It provides you a very rough idea of what is the project "Flex-ON" about.

capacity    proof    regime    transceivers    energy    flex    ghz    tools    fixed    software    numerical    nl    telecom    competitiveness    primary    optimization    granularity    physical    connections    tight    optical    domain    networks    694    propagation    newly    infrastructures    industrial    generation    compensation    ensures    enabled    rate    off    dual    transport    crunch    transceiver    upgrade    dsp    1st    time    2020    nonlinear    hybrid    network    installed    12    efficiency    smooth    2nd    spectral    techniques    trade    fast    grid    technological    flexible    transmission    heterogeneous    frequency    investment    internet    urgent    upcoming    signal    sustainable    itu    intelligent    paradigms    prototype    global    strategies    reconfigurability    horizon    plane    players    symbol    broadband    algorithms    networking    contributions    industry    scientific    digital    encompasses    arbitrarily    prototypes    qam    layer    guarantee    solution    modulation    bit   

Project "Flex-ON" data sheet

The following table provides information about the project.


Organization address
city: TORINO
postcode: 10129

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Italy [IT]
 Total cost 180˙277 €
 EC max contribution 180˙277 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2014
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2015
 Duration (year-month-day) from 2015-10-16   to  2017-10-15


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    POLITECNICO DI TORINO IT (TORINO) coordinator 180˙277.00


 Project objective

The delivery of fast Internet connections all over Europe is a primary goal of Horizon 2020. In order to avoid the upcoming capacity crunch on transport optical networks, there is an urgent need for a strong investment in the research and development of future-proof optical broadband infrastructures. The Flex-ON project will investigate new technological paradigms in terms of signal generation, digital processing and control-plane management for novel flexible and high-capacity transport optical networks. The primary technical objective of the project is to develop and implement a flexible transceiver prototype with intelligent reconfigurability and arbitrarily low bit-rate granularity. The development of this technology will enable to increase the network capacity and the spectral/energy efficiency, while providing a future-proof flexible solution for an increasingly heterogeneous global network.

The main scientific/industrial contributions of the project include: - the optimization of signal modulation to improve spectral efficiency and bit-rate granularity; - the development of novel DSP strategies and algorithms to enable flexible networking; - the development of novel numerical tools for physical layer modelling under the nonlinear (NL) propagation regime; - the optimization of NL compensation methods to improve the trade-off between spectral efficiency and signal reach.

In order to guarantee a sustainable and smooth upgrade of currently installed optical transmission systems, Flex-ON encompasses a dual-generation approach: - 1st generation: fixed frequency grid (ITU-T: 50 GHz) and fixed symbol-rate transceivers with variable bit-rate enabled by time domain hybrid QAM techniques; - 2nd generation: flexible frequency grid (ITU-T G.694.1: 12.5 GHz) and variable symbol-rate transceivers.

The tight collaboration with industry players ensures that the newly proposed concepts, software and prototypes will enhance the European competitiveness in the telecom sector.


year authors and title journal last update
List of publications.
2018 Celestino Martins; Luca Bertignono; Antonino Nespola; Andrea Carena; Fernando Guiomar; Armando Pinto
Efficient Time-Domain DBP using Random Step-Size and Multi-Band Quantization
published pages: , ISSN: , DOI: 10.5281/zenodo.1098456
12 2019-06-11
2017 Guiomar, Fernando P.; Luca Bertignono; Dario Pilori; Antonino Nespola; Gabriella Bosco; Andrea Carena; Fabrizio Forghieri
Comparing Different Options for Flexible Networking: Probabilistic Shaping vs. Hybrid Subcarrier Modulation
published pages: , ISSN: , DOI: 10.5281/zenodo.883607
1 2019-06-11
2017 John C. Cartledge, Fernando P. Guiomar, Frank R. Kschischang, Gabriele Liga, Metodi P. Yankov
Digital signal processing for fiber nonlinearities [Invited]
published pages: 1916, ISSN: 1094-4087, DOI: 10.1364/OE.25.001916
Optics Express 25/3 2019-06-11
2017 Somayeh Ziaie; Ferreira, Ricardo M.; Muga, Nelson J.; Guiomar, Fernando P.; Ali Shahpari; António L. Teixeira; Pinto, Armando N.
Coherent UDWDM Transceivers Based on Adaptive Stokes Space Polarization Demultiplexing in Real-Time
published pages: , ISSN: , DOI: 10.5281/zenodo.883601
1 2019-06-11
2017 Guiomar, Fernando P.; Luca Bertignono; Antonino Nespola; Andrea Carena
Mitigation of Transceiver Bandwidth Limitations using Multi-Subcarrier Signals
published pages: , ISSN: , DOI: 10.5281/zenodo.883568
2 2019-06-11
2017 Andrea Carena; Guiomar, Fernando P.
On the Accumulation of Non-Linear Interference in Multi-Subcarrier Systems
published pages: , ISSN: , DOI: 10.5281/zenodo.883603
1 2019-06-11
2018 Fernando Guiomar; Luca Bertignono; Antonino Nespola; Pierluigi Poggiolini; Fabrizio Forghieri; Andrea Carena
Combining Probabilistic Shaping and Nonlinear Mitigation: Potential Gains and Challenges
published pages: , ISSN: , DOI: 10.5281/zenodo.1098454
12 2019-06-11
2017 Mirko Gagni, Fernando P. Guiomar, Stefan Wabnitz, Armando N. Pinto
Simplified high-order Volterra series transfer function for optical transmission links
published pages: 2446, ISSN: 1094-4087, DOI: 10.1364/OE.25.002446
Optics Express 25/3 2019-06-11
2017 Celestino S. Martins; Sofia B. Amado; Ricardo M. Ferreira; Ali Shahpari; António L. Teixeira; Fernando P. Guiomar; Armando N. Pinto
Real-Time Demonstration of Low-Complexity Time-Domain Chromatic Dispersion Equalization
published pages: , ISSN: , DOI: 10.5281/zenodo.883576
2 2019-06-11
2017 F. P. Guiomar, A. Carena, G. Bosco, L. Bertignono, A. Nespola, P. Poggiolini
Nonlinear mitigation on subcarrier-multiplexed PM-16QAM optical systems
published pages: 4298, ISSN: 1094-4087, DOI: 10.1364/OE.25.004298
Optics Express 25/4 2019-06-11
2017 Ali Shahpari, Ricardo M. Ferreira, Ruben S. Luis, Zoran Vujicic, Fernando P. Guiomar, Jacklyn D. Reis, Antonio L. Teixeira
Coherent Access: A Review
published pages: 1050-1058, ISSN: 0733-8724, DOI: 10.1109/JLT.2016.2623793
Journal of Lightwave Technology 35/4 2019-06-11
2017 Gabriella Bosco; Dario Pilori; Pierluigi Poggiolini; Andrea Carena; Fernando Guiomar
Scalable Modulation Technology and the Tradeoff of Reach, Spectral Efficiency and Complexity
published pages: , ISSN: , DOI: 10.5281/zenodo.1095844
SPIE Photonics West 2017 3 2019-06-11
2017 Sofia B. Amado, Fernando P. Guiomar, Nelson J. Muga, Antonino Nespola, Luca Bertignono, Andrea Carena, Armando Nolasco Pinto
Nonlinear Mitigation of a 400G Frequency-Hybrid Superchannel for the 62.5-GHz Slot
published pages: 3963-3973, ISSN: 0733-8724, DOI: 10.1109/JLT.2017.2724504
Journal of Lightwave Technology 35/18 2019-06-11
2016 Celestino S. Martins, Fernando P. Guiomar, Sofia B. Amado, Ricardo M. Ferreira, Somayeh Ziaie, Ali Shahpari, Antonio L. Teixeira, Armando N. Pinto
Distributive FIR-Based Chromatic Dispersion Equalization for Coherent Receivers
published pages: 5023-5032, ISSN: 0733-8724, DOI: 10.1109/JLT.2016.2604741
Journal of Lightwave Technology 34/21 2019-06-11
2016 Fernando Pedro Pereira Guiomar; Rixin Li; Chris R. S. Fludger; Andrea Carena; Vittorio Curri
Hybrid Modulation Formats Enabling Elastic Fixed-Grid Optical Networks
published pages: , ISSN: 1943-0639, DOI: 10.5281/zenodo.53810
Journal of Optical Communications and Networking 4 2019-06-11

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