Fundamentals of the Nonlinear Optical Channel

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Publications

Introducing 4D Geometric Shell Shaping for Mitigating Nonlinear Interference Noise

Author(s): Sebastiaan Goossens, Yunus Can Gultekin, Olga Vassilieva, Inwoong Kim, Paparao Palacharla, Chigo Okonkwo, Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 41/2, 2023, Page(s) 599-609, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2022.3220402

Polarization-Ring-Switching for Nonlinearity-Tolerant Geometrically Shaped Four-Dimensional Formats Maximizing Generalized Mutual Information

Author(s): Bin Chen, Chigo Okonkwo, Hartmut Hafermann, Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 37/14, 2019, Page(s) 3579 - 3591, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2019.2918072

On the Capacity of Amplitude Modulated Soliton Communication over Long Haul Fibers

Author(s): Yu Chen, Iman Tavakkolnia, Alex Alvarado, Majid Safari
Published in: Entropy, Issue 22/8, 2020, Page(s) 899, ISSN 1099-4300
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/e22080899

Data-Driven Enhancement of the Time-Domain First-Order Regular Perturbation Model

Author(s): Astrid Barreiro, Gabriele Liga, Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 41/9, 2023, Page(s) 2691-2706, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2023.3237041

Experimental Demonstration of Constant-Envelope OFDM to Reduce Intermodulation Impairments and Increase Robustness Against Fiber Nonlinearities

Author(s): Caio Santos, Vinícius Oliari, Helder Roberto O. de Rocha, Maria José Pontes, Marcelo E.V. Segatto, Chigo M. Okonkwo, Alex Alvarado, Jair A.L. Silva
Published in: Journal of Lightwave Technology, Issue 40/15, 2022, Page(s) 4983-4989, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2022.3170864

Time-Limited Waveforms With Minimum Time Broadening for the Nonlinear Schrödinger Channel

Author(s): Youssef Jaffal, Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 41/8, 2023, Page(s) 2361-2368, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2023.3234896

A Soft-Aided Staircase Decoder Using Three-Level Channel Reliabilities

Author(s): Yi Lei; Bin Chen; Gabriele Liga; Alexios Balatsoukas-Stimming; Kaixuan Sun; Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 39/19, 2021, Page(s) 6191--6203, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.48550/arxiv.2103.09991

Analytical Model of Nonlinear Fiber Propagation for General Dual-Polarization Four-Dimensional Modulation Formats

Author(s): Zhiwei Liang, Bin Chen, Yi Lei, Gabriele Liga, Alex Alvarado
Published in: Journal of Lightwave Technology, 2023, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2023.3316836

Performance Prediction Recipes for Optical Links

Author(s): Erik Agrell; Marco Secondini; Alex Alvarado; Tsuyoshi Yoshida
Published in: IEEE Photonics Technology Letters, Issue 33/18, 2021, Page(s) 1034--1037, ISSN 1041-1135
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.48550/arxiv.2102.10139

Pulses With Minimum Residual Intersymbol Interference for Faster Than Nyquist Signaling

Author(s): Youssef Jaffal, Alex Alvarado
Published in: IEEE Communications Letters, Issue 26/11, 2022, Page(s) 2670-2674, ISSN 1089-7798
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/lcomm.2022.3201989

Real-time transmission of geometrically-shaped signals using a software-defined GPU-based optical receiver

Author(s): Sjoerd van der Heide, Ruben S. Luis, Sebastiaan Goossens, Benjamin J. Puttnam, Georg Rademacher, Ton Koonen, Satoshi Shinada, Yoshinari Awaji, Alex Alvarado, Hideaki Furukawa, Chigo Okonkwo
Published in: Optics Express, Issue 30/15, 2022, Page(s) 27171-27179, ISSN 1094-4087
Publisher: Optical Society of America
DOI: 10.1364/oe.450514

List-Encoding CCDM: A Nonlinearity-Tolerant Shaper Aided by Energy Dispersion Index

Author(s): Kaiquan Wu, Gabriele Liga, Alireza Sheikh, Yunus Can Gültekin, Frans M. J. Willems, Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 40/4, 2022, Page(s) 1064 - 1071, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2021.3125783

Novel High-Throughput Decoding Algorithms for Product and Staircase Codes Based on Error-and-Erasure Decoding

Author(s): Alireza Sheikh; Alexandre Graell i Amat; Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 39/15, 2021, Page(s) 4909--4922, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.48550/arxiv.2008.02181

Refined Reliability Combining for Binary Message Passing Decoding of Product Codes

Author(s): Alireza Sheikh; Alexandre Graell i Amat; Gianluigi Liva; Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 39/15, 2021, Page(s) 4958--4973, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.48550/arxiv.2006.00070

Comparison of Short Blocklength Sphere Shaping and Nonlinearity Compensation in WDM Systems

Author(s): Abdelkerim Amari, Lutz Lampe, Sunish Kumar Orappanpara Soman, Yunus Can Gultekin, Alex Alvarado
Published in: IEEE Photonics Technology Letters, Issue 32/22, 2020, Page(s) 1435-1438, ISSN 1041-1135
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/lpt.2020.3030696

Extending Fibre Nonlinear Interference Power Modelling to Account for General Dual-Polarisation 4D Modulation Formats

Author(s): Gabriele Liga, Astrid Barreiro, Hami Rabbani, Alex Alvarado
Published in: Entropy, Issue 22/11, 2020, Page(s) 1324, ISSN 1099-4300
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/e22111324

Capacity Region Bounds for Optical WDM Channels Based on First-Order Regular Perturbation

Author(s): Viswanathan Ramachandran, Gabriele Liga, Astrid Barreiro, Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 41/1, 2023, Page(s) 31-40, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2022.3210890

Improved Decoding of Staircase Codes: The Soft-Aided Bit-Marking (SABM) Algorithm

Author(s): Yi Lei, Bin Chen, Gabriele Liga, Xiong Deng, Zizeng Cao, Jianqiang Li, Kun Xu, Alex Alvarado
Published in: IEEE Transactions on Communications, Issue 67/12, 2019, Page(s) 8220-8232, ISSN 0090-6778
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/tcomm.2019.2945317

Introducing Enumerative Sphere Shaping for Optical Communication Systems With Short Blocklengths

Author(s): Abdelkerim Amari, Sebastiaan Goossens, Yunus Can Gultekin, Olga Vassilieva, Inwoong Kim, Tadashi Ikeuchi, Chigo M. Okonkwo, Frans M. J. Willems, Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 37/23, 2019, Page(s) 5926-5936, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2019.2943938

On Product Codes with Probabilistic Amplitude Shaping for High-Throughput Fiber-Optic Systems

Author(s): Alireza Sheikh, Alexandre Graell i Amat, Alex Alvarado
Published in: IEEE Communications Letters, 2020, Page(s) 1-1, ISSN 1089-7798
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/lcomm.2020.3012042

Capacity Lower Bounds of the Noncentral Chi-Channel With Applications to Soliton Amplitude Modulation

Author(s): Nikita A. Shevchenko, Stanislav A. Derevyanko, Jaroslaw E. Prilepsky, Alex Alvarado, Polina Bayvel, Sergei K. Turitsyn
Published in: IEEE Transactions on Communications, Issue 66/7, 2018, Page(s) 2978-2993, ISSN 0090-6778
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/tcomm.2018.2808286

Achievable Information Rates for Fiber Optics: Applications and Computations

Author(s): Alex Alvarado, Tobias Fehenberger, Bin Chen, Frans M. J. Willems
Published in: Journal of Lightwave Technology, Issue 36/2, 2018, Page(s) 424-439, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2017.2786351

Post-FEC BER Benchmarking for Bit-Interleaved Coded Modulation with Probabilistic Shaping

Author(s): Tsuyoshi Yoshida, Alex Alvarado, Magnus Karlsson, Erik Agrell
Published in: Journal of Lightwave Technology, 2020, Page(s) 1-1, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2020.2990620

Coded Modulation for 100G Coherent EPON

Author(s): Thomas Gerard, Hubert Dzieciol, Eric Sillekens, Yuta Wakayama, Alex Alvarado, Robert I. Killey, Polina Bayvel, Domanic Lavery
Published in: Journal of Lightwave Technology, Issue 38/3, 2020, Page(s) 564-572, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2019.2940889

Hard-Decision Coded Modulation for High-Throughput Short-Reach Optical Interconnect

Author(s): Bin Chen, Yi Lei, Gabriele Liga, Chigo Okonkwo, Alex Alvarado
Published in: Entropy, Issue 22/4, 2020, Page(s) 400, ISSN 1099-4300
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/e22040400

Regular perturbation on the group-velocity dispersion parameter for nonlinear fibre-optical communications

Author(s): Vinícius Oliari, Erik Agrell, Alex Alvarado
Published in: Nature Communications, Issue 11/1, 2020, ISSN 2041-1723
Publisher: Nature Publishing Group
DOI: 10.1038/s41467-020-14503-w

Revisiting Efficient Multi-Step Nonlinearity Compensation with Machine Learning: An Experimental Demonstration

Author(s): Vinicius Oliari, Sebastiaan Goossens, Christian Hager, Gabriele Liga, Rick M. Butler, Menno van den Hout, Sjoerd van der Heide, Henry D. Pfister, Chigo M. Okonkwo, Alex Alvarado
Published in: Journal of Lightwave Technology, 2020, Page(s) 1-1, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2020.2994220

Probabilistic Shaping for Finite Blocklengths: Distribution Matching and Sphere Shaping

Author(s): Yunus Can Gültekin, Tobias Fehenberger, Alex Alvarado, Frans M. J. Willems
Published in: Entropy, Issue 22/5, 2020, Page(s) 581, ISSN 1099-4300
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/e22050581

30% Reach Increase via Low-Complexity Hybrid HD/SD FEC and Improved 4D Modulation

Author(s): Gabriele Liga, Bin Chen, Sjoerd van der Heide, Alireza Sheikh, Menno van den Hout, Chigo Okonkwo, Alex Alvarado
Published in: IEEE Photonics Technology Letters, Issue 32/13, 2020, Page(s) 827-830, ISSN 1041-1135
Publisher: Institute of Electrical and Electronics Engineers
DOI: 10.1109/lpt.2020.2995636

Achievable Information Rates for Probabilistic Amplitude Shaping: An Alternative Approach via Random Sign-Coding Arguments

Author(s): Yunus Can Gültekin, Alex Alvarado, Frans M. J. Willems
Published in: Entropy, Issue 22/7, 2020, Page(s) 762, ISSN 1099-4300
Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
DOI: 10.3390/e22070762

Frequency Logarithmic Perturbation on the Group-Velocity Dispersion Parameter With Applications to Passive Optical Networks

Author(s): Vinicius Oliari; Erik Agrell; Gabriele Liga; Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 39/16, 2021, Page(s) 5287--5299, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.48550/arxiv.2103.05972

Model-Based Machine Learning for Joint Digital Backpropagation and PMD Compensation

Author(s): Rick M. Butler, Christian Hager, Henry D. Pfister, Gabriele Liga, Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 39/4, 2021, Page(s) 949-959, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2020.3034047

Analytical Modeling of Nonlinear Fiber Propagation for Four Dimensional Symmetric Constellations

Author(s): Hami Rabbani; Mostafa Ayaz; Lotfollah Beygi; Gabriele Liga; Alex Alvarado; Erik Agrell; Magnus Karlsson
Published in: Journal of Lightwave Technology, Issue 39/9, 2021, Page(s) 2704--2713, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2021.3055966

Temporal Energy Analysis of Symbol Sequences for Fiber Nonlinear Interference Modelling via Energy Dispersion Index

Author(s): Kaiquan Wu; Gabriele Liga; Alireza Sheikh; Frans M. J. Willems; Alex Alvarado
Published in: Journal of Lightwave Technology, Issue 39/18, 2021, Page(s) 5766--5782, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2021.3092176

Kurtosis-Limited Sphere Shaping for Nonlinear Interference Noise Reduction in Optical Channels

Author(s): Yunus Can Gültekin, Alex Alvarado, Olga Vassilieva, Inwoong Kim, Paparao Palacharla, Chigo Okonkwo, Frans M.J. Willems
Published in: Journal of Lightwave Technology, Issue 40/1, 2022, Page(s) 101 - 112, ISSN 0733-8724
Publisher: Optical Society of America
DOI: 10.1109/jlt.2021.3120915

Analytical SNR Prediction in Long-Haul Optical Transmission using General Dual-Polarization 4D Formats

Author(s): Zhiwei Liang, Bin Chen, Yi Lei, Gabriele Liga, Alex Alvarado
Published in: Proceedings of 2022 European Conference on Optical Communication (ECOC), 2022, ISBN 978-1-957171-15-9
Publisher: IEEE

Modeling of Nonlinear Interference Power for Dual-Polarization 4D Formats

Author(s): G. Liga, B. Chen, A. Barreiro and A. Alvarado
Published in: 2021 Optical Fiber Communications Conference and Exhibition (OFC), 2021, ISBN 978-1-943580-86-6
Publisher: IEEE
DOI: 10.1364/ofc.2021.m5c.2

4D Geometric Shell Shaping with Applications to 400ZR

Author(s): Sebastiaan Goossens, Yunus Can Gültekin, Olga Vassilieva, Inwoong Kim, Paparao Palacharla, Chigo Okonkwo, Alex Alvarado
Published in: Proceedings of Signal Processing in Photonic Communications 2022, 2022, ISBN 978-1-957171-16-6
Publisher: Optica

Model-aided Geometrical Shaping of Dual-polarization 4D Formats in the Nonlinear Fiber Channel

Author(s): Gabriele Liga, Bin Chen, Alex Alvarado
Published in: Proceedings of Optical Fiber Communication Conference 2022, 2022, ISBN 978-1-55752-466-9
Publisher: IEEE
DOI: 10.1364/ofc.2022.th1h.3

Capacity Region Bounds for K-User Optical WDM Channels with Peak Power Constraints

Author(s): Viswanathan Ramachandran, Gabriele Liga, Astrid Barreiro, Alex Alvarado
Published in: Proceedings of Optical Fiber Communication Conference 2022, 2022, ISBN 978-1-55752-466-9
Publisher: IEEE
DOI: 10.1364/ofc.2022.tu3b.4

A Data-driven optimization of First-order Regular Perturbation Coefficients for Fiber Nonlinearities

Author(s): Astrid Barreiro, Gabriele Liga, Alex Alvarado
Published in: Proceedings of 2022 IEEE Photonics Conference (IPC), 2022, ISBN 978-1-6654-3487-4
Publisher: IEEE
DOI: 10.1109/ipc53466.2022.9975602

Achievable Information Rate Losses for High Order Modulation and Hard-Decision Forward Error Correction

Author(s): Alex Alvarado, Yi Lei, David S. Millar
Published in: 2018 European Conference on Optical Communication (ECOC), 2018, Page(s) 1-3, ISBN 978-1-5386-4862-9
Publisher: IEEE
DOI: 10.1109/ecoc.2018.8535531

Probabilistic Constellation Shaping Algorithms: Performance vs. Complexity Trade-offs

Author(s): Yunus Can Gültekin, Alex Alvarado
Published in: Proceedings of 42nd WIC Symposium on Information Theory and Signal Processing in the Benelux, SITB 2022, 2022
Publisher: Werkgemeenschap voor Informatie- en Communicatietheorie (WIC), and the IEEE Benelux Signal Processing Chapter

Mitigating Nonlinear Interference by Limiting Energy Variations in Sphere Shaping

Author(s): Yunus Can Gültekin, Alex Alvarado, Olga Vassilieva, Inwoong Kim, Paparao Palacharla, Chigo Okonkwo, Frans M.J. Willems
Published in: Proceedings of Optical Fiber Communication Conference 2022, 2022, ISBN 978-1-55752-466-9
Publisher: IEEE
DOI: 10.1364/ofc.2022.th3f.2

Temporal Properties of Enumerative Shaping: Autocorrelation and Energy Dispersion Index

Author(s): Yunus Can Gültekin, Kaiquan Wu, Alex Alvarado
Published in: Proceedings of Signal Processing in Photonic Communications 2022, 2022, ISBN 978-1-957171-16-6
Publisher: Optica

Exponentially-Weighted Energy Dispersion Index for the Nonlinear Interference Analysis of Finite-Blocklength Shaping.

Author(s): Kaiquan Wu; Gabriele Liga; Yunus Can Gultekin; Alex Alvarado
Published in: 2021 European Conference on Optical Communication (ECOC), 2021
Publisher: IEEE
DOI: 10.1109/ecoc52684.2021.9606009

DFE State-Tracking Demapper for Soft-Input FEC in 800G Data Center Interconnects

Author(s): Kaiquan Wu, Gabriele Liga, Jeffrey Lee, Lotte Paulissen, Jamal Riani, Alex Alvarado
Published in: Proceedings of 2022 European Conference on Optical Communication (ECOC), 2022, ISBN 978-1-957171-15-9
Publisher: IEEE

End-to-End Learning in Optical Fiber Communications: Experimental Demonstration and Future Trends

Author(s): Boris Karanov; Vinicius Oliari; Mathieu Chagnon; Gabriele Liga; Alex Alvarado; Vahid Aref; Domanic Lavery; Polina Bayvel; Laurent Schmalen
Published in: 2020 European Conference on Optical Communications, ECOC 2020, 2020, ISBN 9781728173610
Publisher: IEEE
DOI: 10.1109/ecoc48923.2020.9333265

On Optimum Enumerative Sphere Shaping Blocklength at Different Symbol Rates for the Nonlinear Fiber Channel

Author(s): Yunus Can Gültekin, Olga Vassilieva, Inwoong Kim, Paparao Palacharla, Chigo Okonkwo, Alex Alvarado
Published in: Proceedings of 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022, ISBN 978-4-88552-336-6
Publisher: IEEE
DOI: 10.23919/oecc/psc53152.2022.9849911

Distance-Agnostic Auto-Encoders for Short Reach Fiber Communications

Author(s): Boris Karanov, Laurent Schmalen, Alex Alvarado
Published in: 2021 Optical Fiber Communications Conference and Exhibition, OFC 2021, 2021, ISBN 9781943580866
Publisher: IEEE
DOI: 10.1364/ofc.2021.tu5d.1

Shaped Four-Dimensional Modulation Formats for Optical Fiber Communication Systems

Author(s): Bin Chen, Gabriele Liga, Yi Lei, Wei Ling, Zhengyan Huan, Xuwei Xue, Alex Alvarado
Published in: Proceedings of Optical Fiber Communication Conference 2022, 2022, ISBN 978-1-55752-466-9
Publisher: IEEE
DOI: 10.1364/ofc.2022.th3f.4

Analysis and optimisation of distribution matching for the nonlinear fibre channel

Author(s): T. Fehenberger, A. Alvarado
Published in: 45th European Conference on Optical Communication (ECOC 2019), 2019, Page(s) 323 (4 pp.)-323 (4 pp.), ISBN 978-1-83953-185-9
Publisher: Institution of Engineering and Technology
DOI: 10.1049/cp.2019.1057

First Experimental Verification of Improved Decoding of Staircase Codes using Marked Bits

Author(s): Bin Chen, Yi Lei, Sjoerd van der Heide, John van Weerdenburg, Alex Alvarado, Chigo Okonkwo
Published in: Optical Fiber Communication Conference (OFC) 2019, 2019, Page(s) W3H.3, ISBN 978-1-943580-53-8
Publisher: OSA
DOI: 10.1364/ofc.2019.w3h.3

Rate-Adaptive Coded Modulation with Geometrically-shaped Constellations

Author(s): Bin Chen, Yi Lei, Domanic Lavery, Chigo Okonkwo, Alex Alvarado
Published in: 2018 Asia Communications and Photonics Conference (ACP), 2018, Page(s) 1-3, ISBN 978-1-5386-6158-1
Publisher: IEEE
DOI: 10.1109/acp.2018.8595918

Enumerative sphere shaping for rate adaptation and reach increase in WDM transmission systems

Author(s): A. Amari, S. Goossens, Y.C. Gültekin, O. Vassilieva, Inwoong Kim, T. Ikeuchi, C. Okonkwo, F.M.J. Willems, A. Alvarado
Published in: 45th European Conference on Optical Communication (ECOC 2019), 2019, Page(s) 261 (4 pp.)-261 (4 pp.), ISBN 978-1-83953-185-9
Publisher: Institution of Engineering and Technology
DOI: 10.1049/cp.2019.0995

Geometrically-shaped 64-point Constellations via Achievable Information Rates

Author(s): Bin Chen, Chigo Okonkwo, Domanic Lavery, Alex Alvarado
Published in: 2018 20th International Conference on Transparent Optical Networks (ICTON), 2018, Page(s) 1-4, ISBN 978-1-5386-6605-0
Publisher: IEEE
DOI: 10.1109/icton.2018.8473932

Revisiting multi-step nonlinearity compensation with machine learning

Author(s): C. Häger, H.D. Pfister, R.M. Bütler, G. Liga, A. Alvarado
Published in: 45th European Conference on Optical Communication (ECOC 2019), 2019, Page(s) 213 (4 pp.)-213 (4 pp.), ISBN 978-1-83953-185-9
Publisher: Institution of Engineering and Technology
DOI: 10.1049/cp.2019.0947

A novel soft-aided bit-marking decoder for product codes

Author(s): G. Liga, A. Sheikh, A. Alvarado
Published in: 45th European Conference on Optical Communication (ECOC 2019), 2019, Page(s) 70 (4 pp.)-70 (4 pp.), ISBN 978-1-83953-185-9
Publisher: Institution of Engineering and Technology
DOI: 10.1049/cp.2019.0804

Improving HD-FEC decoding via bit marking

Author(s): Alex Alvarado, Gabriele Liga, Yi Lei, Bin Chen, Alexios Balatsoukas-Stimming
Published in: 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019, Page(s) 1-3, ISBN 978-4-88552-321-2
Publisher: IEEE
DOI: 10.23919/ps.2019.8817790

Decoding Staircase Codes with Marked Bits

Author(s): Yi Lei, Alex Alvarado, Bin Chen, Xiong Deng, Zizheng Cao, Jianqiang Li, Kun Xu
Published in: 2018 IEEE 10th International Symposium on Turbo Codes & Iterative Information Processing (ISTC), 2018, Page(s) 1-5, ISBN 978-1-5386-7048-4
Publisher: IEEE
DOI: 10.1109/istc.2018.8625340

First Experimental Demonstration of Probabilistic Enumerative Sphere Shaping in Optical Fiber Communications

Author(s): Sebastiaan Goossens, Sjoerd Van der Heide, Menno Van den Hout, Abdelkerim Amari, Yunus Can Gultekin, Olga Vassilieva, Inwoong Kim, Tadashi Ikeuchi, Frans M. J. Willems, Alex Alvarado, Chigo Okonkwo
Published in: 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019, Page(s) 1-3, ISBN 978-4-88552-321-2
Publisher: IEEE
DOI: 10.23919/ps.2019.8818086

On parameter optimization of product codes for iterative bounded distance decoding with scaled reliability

Author(s): A. Sheikh, A. Graell i Amat, G. Liva, A. Alvarado
Published in: 45th European Conference on Optical Communication (ECOC 2019), 2019, Page(s) 71 (4 pp.)-71 (4 pp.), ISBN 978-1-83953-185-9
Publisher: Institution of Engineering and Technology
DOI: 10.1049/cp.2019.0805

Regular perturbation for the weak-dispersion regime

Author(s): Vinicius Oliari, Erik Agrell, Alex Alvarado
Published in: 2019 21st International Conference on Transparent Optical Networks (ICTON), 2019, Page(s) 1-4, ISBN 978-1-7281-2779-8
Publisher: IEEE
DOI: 10.1109/icton.2019.8840474

End-to-End Learning of Geometrical Shaping Maximizing Generalized Mutual Information

Author(s): Kadir Gümüş, Alex Alvarado, Bin Chen, Christian Häger, Erik Agrell
Published in: Optical Fiber Communication Conference (OFC) 2020, 2020, Page(s) W3D.4, ISBN 978-1-943580-71-2
Publisher: OSA
DOI: 10.1364/ofc.2020.w3d.4

Model-Based Machine Learning for Joint Digital Backpropagation and PMD Compensation

Author(s): Christian Häger, Henry D. Pfister, Rick M. Bütler, Gabriele Liga, Alex Alvarado
Published in: Optical Fiber Communication Conference (OFC) 2020, 2020, Page(s) W3D.3, ISBN 978-1-943580-71-2
Publisher: OSA
DOI: 10.1364/ofc.2020.w3d.3

Deep Learning for Communication over Dispersive Nonlinear Channels: Performance and Comparison with Classical Digital Signal Processing

Author(s): Boris Karanov, Gabriele Liga, Vahid Aref, Domanic Lavery, Polina Bayvel, Laurent Schmalen
Published in: 2019 57th Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2019, Page(s) 192-199, ISBN 978-1-7281-3151-1
Publisher: IEEE
DOI: 10.1109/allerton.2019.8919850

Band-ESS: Streaming Enumerative Coding with Applications to Probabilistic Shaping

Author(s): Yunus Can Gültekin, Frans M. J. Willems, Alex Alvarado
Published in: Proceedings of GLOBECOM 2022 - 2022 IEEE Global Communications Conference, 2022, ISBN 978-1-6654-3540-6
Publisher: IEEE
DOI: 10.1109/globecom48099.2022.10000599

On Kurtosis-limited Enumerative Sphere Shaping for Reach Increase in Single-span Systems

Author(s): Yunus Can Gültekin, Alex Alvarado, Olga Vassilieva, Inwoong Kim, Paparao Palacharla, Chigo M. Okonkwo, Frans M.J. Willems
Published in: 2021 European Conference on Optical Communication, ECOC 2021, 2021, ISBN 978-1-6654-3868-1
Publisher: IEEE
DOI: 10.1109/ecoc52684.2021.9605938

Capacity Bounds for Optical WDM Channels with Peak Power Constraints

Author(s): Viswanathan Ramachandran, Gabriele Liga, Astrid Barreiro, Alex Alvarado
Published in: Proceedings of Optica Advanced Photonics Congress 2022, 2022, ISBN 978-1-957171-16-6
Publisher: Optica

Log-CCDM: Distribution Matching via Multiplication-free Arithmetic Coding

Author(s): Yunus Can Gültekin, Frans M. J. Willems, Alex Alvarado
Published in: Proceedings of 2022 IEEE International Symposium on Information Theory (ISIT), 2022, ISBN 978-1-6654-2159-1
Publisher: IEEE
DOI: 10.1109/isit50566.2022.9834834

Reducing the Error Floor of the Sign-Preserving Min-Sum LDPC Decoder via Message Weighting of Low-Degree Variable Nodes

Author(s): Lotte Paulissen, Alex Alvarado, Kaiquan Wu, Alexios Balatsoukas-Stimming
Published in: Proceedings of 2022 European Conference on Optical Communication (ECOC), 2022, ISBN 978-1-957171-15-9
Publisher: IEEE

Optical communication over non-linear optical fiber

Author(s): Alex Alvarado
Published in: Proceedings of WIC Midwintermeeting 2020, 2020
Publisher: Werkgemeenschap voor Informatie- en Communicatietheorie

Constellation Shaping for Optical Communications

Author(s): Alex Alvarado and Bin Chen
Published in: Proceedings of Signal Processing in Photonics Communications (SPPCom), 2020
Publisher: Optica

Intellectual Property Rights

Soft-aided decoding of staircase codes

Application/Publication number: US 11251809B2
Date: 2022-02-01
Applicant(s): TECHNISCHE UNIVERSITEIT EINDHOVEN

Amplitude shaping method, receiving method, processing unit and generator unit for an amplitude shaper, and an amplitude shaper

Application/Publication number: WO 2023003475A1
Date: 2023-01-01
Applicant(s): TECHNISCHE UNIVERSITEIT EINDHOVEN

Band-Enumerative Sphere shaping and Logarithmic based Constant composition Distribution matching encoding techniques

Application/Publication number: PCT/NL2023/ 050220
Date: 2023-04-01
Applicant(s): TECHNISCHE UNIVERSITEIT EINDHOVEN

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