Prof. Dr.-Ing. Laurent Schmalen
- Sprechstunden:
nach Vereinbarung
- Raum: 106
Hertzstr. 16 06.45 - Tel.: +49 721 608-43345
- Fax: +49 721 608-46071
- laurent schmalenBbv4∂kit edu
Geb.06.45, Hertzstr. 16, D-76187 Karlsruhe
Werdegang
Preise & Auszeichnungen | Eingeladene Vorträge | Veröffentlichungen |
Ausbildung und Berufserfahrung
1999 | Abitur am Lycée Classique Diekirch |
2005 | Diplom (mit Auszeichung) in Elektrotechnik und Informationstechnik an der RWTH Aachen University |
2011 | Promotion zum Dr.-Ing. (summa cum laude) in Elektrotechnik und Informationstechnik an der RWTH Aachen University am Institut für Nachrichtengeräte und Datenverarbeitung (IND) |
2011-2019 | Industrietätigkeit bei den Bell Labs |
2014-2019 | Gastdozent an der Universität Stuttgart |
Arbeitsgebiete
- Kanalcodierung und codierte Modulation
- Hochgeschwindsigkeitsdatenübertragung
- Optische Nachrichtenübertragung
- Übertragung über Kanäle mit nichtlinearen Charakteristika
Verbandsmitgliedschaften
- Institute of Electrical and Electronics Engineers (IEEE), seit 2006, Senior Member seit 2016
- Verband der Elektrotechnik, Elektronik, Informationstechnik e.V. (VDE), seit 2001
- Informationstechnische Gesellschaft (ITG) im VDE
Preise und Auszeichnungen
2021 | IEEE/OSA Journal of Lightwave Technology 2018 Best Paper Award |
2020 | ERC Consolidator Grant [KIT-Pressemeldung] |
2019 | IEEE/OSA Journal of Lightwave Technology 2016 Best Paper Award |
2019 | IEEE/OSA Journal of Lightwave Technology Outstanding Reviewer Recognition |
2019 | Teilnahme am German-American Frontiers of Engineering Symposium (GAFOE) 2019 der Alexander von Humboldt-Stiftung |
2018 | "Most Innovative AI Solution" bei der Nokia Artificial Intelligence-Konferenz |
2018 | Nokia ION Business Excellence Award |
2015 | Exemplary Reviewer Award der IEEE Transactions on Communications |
2014 | Bell Labs President’s Award |
2013 | Bob Owens Best Student Paper Award auf dem IEEE Signal Processing Systems (SiPS) Workshop |
2012 | Friedrich-Wilhelm-Preis der RWTH Aachen für herausragende wissenschaftliche Leistungen in der Promotion |
2012 | Borchers-Plakette der RWTH Aachen |
2011 | E-Plus-Preis für eine herausragende Dissertation im Bereich der Nachrichtentechnik |
2010 | Best Paper Award auf der 9ten ITG Fachtagung Sprachkommunikation |
2006 | Friedrich-Wilhelm-Preis für herausragende wissenschaftliche Leistungen in der Diplomarbeit |
2005 | Springorum-Denkmünze für die mit Auszeichnung bestandene Diplomprüfung |
2002 | Aachener VDE-Preis |
Ausgewählte Veröffentlichungen
- B. Karanov, M. Chagnon, F. Thouin, T. A. Eriksson, H. Bülow, D. Lavery, P. Payvel and L. Schmalen, “End-to-end Deep Learning of Optical Fiber Communications,” IEEE/OSA Journal of Lightwave Technology, vol. 36, no. 20, pp. 4843-4855, Okt. 2018 [IEEEXplore Open Access], [arXiv]
- V. Aref, N. Rengaswamy and L. Schmalen, “Finite-Length Analysis of Spatially-Coupled Regular LDPC Ensembles on Burst-Erasure Channels”, IEEE Transactions on Information Theory, vol. 64, no. 5, pp. 3431-3449, Mai 2018 [IEEEXplore], [arXiv]
- L. Schmalen, A. Alvarado and R. Rios-Müller, “Performance Prediction of Nonbinary Forward Error Correction in Optical Transmission Experiments”, IEEE/OSA Journal of Lightwave Technology, vol. 35, no. 3, pp. 1015-1027, Feb. 2017 [IEEEXplore Open Access], [arXiv]
- F. Buchali, F. Steiner, G. Böcherer, L. Schmalen, P. Schulte and W. Idler, “Rate Adaptation and Reach Increase by Probabilistically Shaped 64-QAM: An Experimental Demonstration”, IEEE/OSA Journal on Lightwave Technology, vol. 34, no. 87, pp. 1599-1609, Apr. 2016 [IEEEXplore]
- L. Schmalen, “A Low-Complexity LDPC Coding Scheme for Channels with Phase Slips”, IEEE/OSA Journal on Lightwave Technology, vol. 33, no. 7, pp. 1319-1325, Apr. 2015 [IEEEXplore]
- L. Schmalen, V. Aref, J. Cho, D. Suikat, D. Rösener, and A. Leven, “Spatially Coupled Soft-Decision Forward Error Correction for Future Lightwave Systems”, IEEE/OSA Journal on Lightwave Technology, vol. 33, no. 5, pp. 1109-1116, März 2015 [IEEEXplore]
- A. Leven and L. Schmalen, “Status and Recent Advances on Forward Error Correction Technologies for Lightwave Systems”, IEEE/OSA Journal on Lightwave Technology, vol. 32, no. 16, pp. 2735-2750, Aug. 2014 [IEEEXplore]
- L. Schmalen, F. Buchali, A. Leven, and S. ten Brink, “A Generic Tool for Assessing the Soft-FEC Performance in Optical Transmission Experiments”, IEEE Photonics Technology Letters, vol. 24, no. 1, pp. 40-42, Jan. 2012 [IEEEXplore]
- L. Schmalen and P. Vary, “Iterative Source-Channel Decoding with Reduced Error Floors”, IEEE Journal on Selected Topics in Signal Processing, vol. 5, no. 8, pp. 1577-1587, Dez. 2011 [IEEEXplore]
- L. Schmalen, M. Adrat, T. Clevorn, and P. Vary, “EXIT-Chart Based System Design For Iterative Source-Channel Decoding with Fixed-Length Codes”, IEEE Transactions on Communications, vol. 59, no. 9, pp. 2406-2413, Sep. 2011 [IEEEXplore]
Eingeladene Vorträge
Dec. 2020 | European Conference on Optical Communications (ECOC), Brüssel, Belgien "End-to-End Learning in Optical Fiber Communications: Concept and Transceiver Design” |
Nov. 2020 | IEEE European School of Information Theory (ESIT), Stuttgart, Germany "Spatially Coupled LDPC Codes - Theory and Applications" |
Oct. 2020 | Aston Mini-Symposium and Tutorial on numerical implementation of Bayesian filtering for signal equalisation and demodulation "Bayes’ Theorem and the BCJR Algorithm – Swiss Army Knife for Communication Engineers” |
Sep. 2020 | IEEE Photonics Conference (IPC), Special Symposium for Machine Learning in Photonic Systems "Optical Fiber Communication Systems Based on End-to-End Deep Learning” |
Feb. 2020 | DLR-MIT-TUM Workshop on Coding and Random Access, Oberpfaffenhofen, Germany "Burst Correction Capabilities of Spatially Coupled LDPC Codes: Finite-length Analysis and Application Example" |
Feb. 2020 | KIT Karlsruhe, Workshop der ITG Fachgruppe KT 3.1 "Modellierung photonischer Komponenten und Systeme" "Deep Learning zur Datenübertragung und Kanalapproximation in photonischen Systemen - Einführung und Anwendungsbeispiele" |
Dec. 2019 | TU Einhoven, van der Meulen Seminar organized by the Benelux Chapter on Information Theory. "End-to-End Deep Learning of Optical Fiber Communications" |
Oct. 2019 | Chalmers University of Technology, DIMENSIONS project kick-off meeting. Keynote-Vortrag "Design of “Low-Cost Optical Communication Systems Using Deep Learning - A Viable Solution?" |
Aug. 2019 | Information Theory Workshop (ITW) in Lyngby, Schweden "Spatially Coupled LDPC Codes with Non-uniform Coupling for Improved Decoding Speed" |
Jul. 2019 | TU München, Gastvorlesung "Spatially Coupled LDPC Codes |
June 2019 | DTU Lyngby "End-to-end Deep learning of Optical Communications using Bidirectional Recurrent Neural Networks" |
Mar. 2019 | International Conference on Advanced Optical Technologies in Erlangen, Keynote-Vortrag "Communicate to the Limit – A Journey Towards Reliable Optical Communications and Beyond" |
Mar. 2019 | Optical Fiber Communications Conference (OFC) in San Diego, CA, USA, Workshop "Optical Experiments and Testing, With or Without FEC?" "How to Evaluate Optical Transmission Experiments?" |
Mar. 2019 | Optical Fiber Communications Conference (OFC) in San Diego, CA, USA, Show-Floor-Programm "Innovations with Machine Learning in Optical Networks Drive Process Automation" "Machine Learning in Optical Communications: Promises and Potential" |
Mar. 2019 | Optical Fiber Communications Conference (OFC) in San Diego, CA, USA, Shannon Theatre "FEC and Shaping in Optical Networks" |
Feb. 2019 | DLR Oberpfaffenhofen, 2019 Oberpfaffenhofen Workshop on High Throughput Coding (OWHTC), DLR, Oberpfaffenhofen "Spatial Coupling - Essential Technology for High Throughput Coding?" |
Sep. 2018 | European Conference on Optical Communications (ECOC) in Rom, Italien "Performance Metrics for Forward Error Correction in Fiber-optic Communication Systems" |
Jun. 2018 | Bell Labs President’s Seminar in Murray Hill, NJ, USA "Communicate to the Limit – A Journey towards Reliable Networks and Beyond" |
Apr. 2018 | TU Eindhoven, Eindhoven Workshop on Optical Communications (EWOC) "Spatially Coupled Codes in Optical Communications: Technology for the Physical Layer and Beyond" |
Mar. 2018 | Optical Fiber Communications Conference (OFC) in San Diego, CA, USA "Probabilistic Constellation Shaping: Challenges and Opportunities for Forward Error Correction" |
Mar. 2018 | Optical Fiber Communications Conference (OFC) in San Diego, CA, USA, Workshop on "DSP for Short Reach and Client Optics – What Makes Sense?" "Forward Error Correction for Short Reach Communications" |
Mar. 2018 | Optical Fiber Communications Conference (OFC) in San Diego, CA, USA, Shannon Theatre "FEC and Shaping in Optical Networks" |
Feb. 2018 | Chalmers Univeristy of Technology, KAW Energy Efficiency Workshop "Spatially Coupled LDPC Codes – Potential Applications in Optical Communications and Recent Results" |
Jan. 2018 | TU Chemnitz "Spatial Coupling - A Versatile Tool for High-Speed Communications Close to the Theoretical Limits" |
Dec. 2017 | Universität Siegen "Spatial Coupling - A Versatile Tool for Communicating Close to the Theoretical Limits" |
Oct. 2018 | KIT Karlsruhe "Channel Coding for High-Speed Communications – Recent Advances Using Spatially Coupled Codes" |
Sep. 2017 | DTU Lyngby, Special ECOC 2017 Symposium "SASER – A European Success Story" |
Jul. 2017 | RWTH Aachen University, GfK-Kolloquium "Kommunikation nahe der theoretischen Grenzen – von der iterativen Quellen-Kanaldecodierung zu optischen Hochgeschwindigkeitsnetzen" |
Jun. 2017 | Nokia AON (Agile Optical Networks) Tech Summit China, Beijing, China, Plenarvortrag "A Look into the Future of Optical Networks" |
May 2017 | Nokia AON (Agile Optical Networks) Tech Summit APAC, Sydney, Australien, Plenarvortrag "A Look into the Future of Optical Networks" |
Apr. 2017 | TU Eindhoven "Channel Coding for High-Speed Optical Communications – Status and Recent Advances Using Spatially Coupled Codes" |
Nov. 2016 | Ecole Polytechnique Fédérale de Lausanne (EPFL) "Channel Coding for High-Speed Optical Communications – Status and Recent Advances Using Spatially Coupled Codes" |
Jul. 2016 | FAU Erlangen "Channel Coding for High-Speed Optical Communications – Status and Recent Advances Using Spatially Coupled Codes" |
Feb. 2016 | Bell Labs Colloquium, Stuttgart "Forward Error Correction for High-Speed Optical Communications – Status and Recent Advances" |
Nov. 2015 | Asia Communications & Photonics Conference (ACP) "Next-Generation Forward Error Correction: Can We Close the Gap to the Shannon Limit?" |
Oct. 2015 | Télécom ParisTech "LDPC Coding Schemes for Optical Communications Affected by Phase Slips" |
Oct. 2015 | IEEE Photonics Conference (IPC) "Novel Forward Error Correction Concepts for Coherent Optical Communications" |
Jun. 2015 | IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC) "Spatially Coupled Codes and Optical Fiber Communications: An Ideal Match?" (invited poster) |
Dec. 2014 | Workshop on Information Theory of Optical Fibers, TU Munich "Code Design for Channels Affected by Phase Slips" |
Dec. 2014 | KTH Stockholm "Forward Error Correction for Optical Long-Haul Networks – Challenges and Recent Developments" |
Sep. 2014 | European Conference on Optical Communications (ECOC) in Cannes, Frankreich "Next Generation Error Correcting Codes for Lightwave Systems" |
Mar. 2014 | Optical Fiber Communications Conference (OFC) in San Francisco, CA, USA "Energy Efficient FEC for Optical Transmission Systems" |
Jan. 2014 | Universität Stuttgart, Kolloquium der Fakultät 5 "Forward Error Correction for Optical Long-Haul Networks – Challenges and Recent Developments" |
Jul. 2013 | RWTH Aachen University, GfK-Kolloquium "Modulation and Coding in Optical Core Networks" |
Sep. 2012 | TU Kaiserslautern, Workshop "Iterative Receivers" "Modulation and Coding in Optical Core Networks" |
Oct. 2010 | Bell Labs, Alcatel-Lucent, Stuttgart "Iterative Source-Channel Decoding: Design and Optimization for Heterogeneous Networks" |
Jun. 2008 | Nokia Research in Tampere Finland, Flexcode Seminar "Turbo Source Coding" |
Jun. 2007 | Orange/France Telecom Research Lab Lannion, Flexcode Seminar "Modern Techniques for Flexible, Iterative Source-Channel Decoding" |
Gesamte Liste der Veröffentlichungen
Eine komplette, aktuelle Liste der Veröffentlichungen finden Sie auch bei Google Scholar.
Zeitschriftenbeiträge
- S. Thai Le, K. Schuh, F. Buchali, X.-Q. Du, M. Grözing, M. Berroth, L. Schmalen, and H. Bülow, "Single Sideband Transmission Employing a 1-to-4 ADC Frontend and Parallel Digitization," IEEE/OSA Journal of Lightwave Technology, vol. 38, no. 12, Jun. 2020
- A. Teixeira, D. Lavery, E. Ciaramella, L. Schmalen, N. Iiyama, R. Ferreira, and S. Randel, “DSP enabled Optical Detection Techniques for PON,” IEEE/OSA Journal of Lightwave Technology, vol. 38. no. 2, Feb. 2020
- S. Thai Le, K. Schuh, R. Dischler, F. Buchali, L. Schmalen and H. Bülow, “Beyond 400 Gb/s Direct Detection over 80km for Data Center Interconnect Applications,” IEEE/OSA Journals of Lightwave Technology, vol. 38, no. 2, Jan. 2020
- A. Elkelesh, M. Ebada, S. Cammerer, L. Schmalen, and S. ten Brink, “Decoder-in-the-Loop: Genetic Optimization-based LDPC Code Design,” IEEE Access, vol. 7, Sep. 2019
- B. Karanov, D. Lavery, P. Payvel and L. Schmalen, “End-to-End Optimized Transmission over Dispersive Intensity-Modulated Channels Using Bidirectional Recurrent Neural Networks,” OSA Optics Express, vol. 27, no. 14, pp. 19650-19663, also available as arXiv:1901.08570
- B. Karanov, M. Chagnon, F. Thouin, T. A. Eriksson, H. Bülow, D. Lavery, P. Payvel and L. Schmalen, “End-to-end Deep Learning of Optical Fiber Communications,” IEEE/OSA Journal of Lightwave Technology, vol. 36, no. 20, pp. 4843-4855, Oct. 2018, also available as arXiv:1804.04097
- A. Buchberger, A. Graell i Amat, V. Aref and L. Schmalen, “Probabilistic Eigenvalue Shaping for Nonlinear Fourier Transform Transmission,” IEEE/OSA Journal of Lightwave Technology, vol. 36, no. 20, pp. 4799-4807, Oct. 2018, also available as arXiv:1712.08467
- V. Aref, N. Rengaswamy and L. Schmalen, “Finite-Length Analysis of Spatially-Coupled Regular LDPC Ensembles on Burst-Erasure Channels”, IEEE Transactions on Information Theory, vol. 64, no. 5, pp. 3431-3449, May 2018, also available as arXiv:1611.08267
- H. Bülow, V. Aref and L. Schmalen, “Modulation of Discrete Nonlinear Spectrum: Perturbation Sensitivity and Achievable Rates,” IEEE Photonics Technology Letters, vol. 30, no. 5, pp. 423-426, Mar. 2018
- I. Fernandez de Jauregui Ruiz, A. Ghazisaeidi, O, Ait Sab, P. Plantady, A. Calsat, S. Dubost, L. Schmalen, V. Letellier, and J. Renaudier, “25.4 Tb/s Transmission over Trans-Pacific Distances Using Truncated Probabilistically Shaped PDM-64QAM”, IEEE/OSA Journal of Lightwave Technology, vol. 36, no. 6, pp. 1354-1361, Mar. 2018
- J. Cho, X. Chen, S: Chandrasekhar, G. Raybon, R. Dar, L. Schmalen, E. Burrows, A. Adamiecki, S. Corteselli, Y. Pan, D. Correa, B. McKay, S. Zsigmond, P. J. Winzer, and S. Grubb, “Trans-Atlantic Field Trial Using High Spectral Efficiency Probabilistically Shaped 64-QAM and Single-Carrier Real-Time 250-Gb/s 16-QAM”, IEEE/OSA Journal of Lightwave Technology, vol. 36, no. 1, pp. 103-113, Jan. 2018
- W. Lautenschläger, N. Benzaoui, F. Buchali, L. Dembeck, R. Dischler, B. Franz, J. Milbrandt, Y. Pointurier, D. Rösener, L. Schmalen and A. Leven, “Optical Ethernet – Flexible Optical Metro Networks”, IEEE/OSA Journal of Lightwave Technology, vol. 35, no. 12, pp. 2346-2357, Jun. 2017
- W. Idler, F. Buchali, L. Schmalen, E. Lach, R.-P. Braun, G. Böcherer, P. Schulte and F. Steiner, “Field Trial of a 1Tbit/s Super-Channel Network Using Probabilistically Shaped Constellations”, IEEE/OSA Journal of Lightwave Technology, vol. 35, no. 8, pp. 1399-1406, April 2017
- A. Ghazisaeidi, I. Fernandez de Jaregui Ruiz, R. Rios-Müller, L. Schmalen, P. Tran, P. Brindel, A. Carbo Meseguer, Q. Hu, F. Buchali, G. Charlet and J. Renaudier, “Advanced C+L Band Transoceanic Transmission Systems Based on Probabilistically-Shaped PDM-64QAM”, IEEE/OSA Journal of Lightwave Technology, vol. 35, no. 7, pp. 1291-1299, April 2017
- L. Schmalen, A. Alvarado and R. Rios-Müller, “Performance Prediction of Nonbinary Forward Error Correction in Optical Transmission Experiments”, IEEE/OSA Journal of Lightwave Technology, vol. 35, no. 3, Feb. 2017, pp. 1015-1027, also available as arXiv:1606.00755v2
- A. Ghazisaeidi, I. Fernandez, L. Schmalen, P. Tran, C. Simonneau, E. Awwad, B. Uscumlic, P. Brindel, and G. Charlet, “Submarine Transmission Systems Using Digital Nonlinear Compensation and Adaptive-Rate Forward Error Correction”, IEEE/OSA Journal of Lightwave Technology, vol. 34, no. 8, pp. 1886-1895, Apr. 2016
- F. Buchali, F. Steiner, G. Böcherer, L. Schmalen, P. Schulte and W. Idler, “Rate Adaptation and Reach Increase by Probabilistically Shaped 64-QAM: An Experimental Demonstration”, IEEE/OSA Journal of Lightwave Technology, vol. 34, no. 87, pp. 1599-1609, Apr. 2016
– IEEE/OSA Journal of Lightwave Technology 2016 Best Paper Award – - C. Pan, H. Bülow, L. Schmalen, W. Idler, and F. R. Kschischang, “Optical Nonlinear-Phase-Noise Compensation for 32 Gbaud PolDM-16 QAM Transmission Using a Code-Aided Expectation-Maximization Algorithm”, IEEE/OSA Journal of Lightwave Technology, vol. 33, no. 17, pp. 3679-3686, Sep. 2015
- A. Ghazisaeidi, L. Schmalen, I. Fernandez, C. Simmoneau, P. Tran, P. Brindel, and G. Charlet, “Transoceanic Transmission Systems Using Adaptive Multi-Rate FECs”, IEEE/OSA Journal of Lightwave Technology, vol. 33, no. 7, pp. 1479-1487, Apr. 2015
- J. Renaudier, R. Rios-Müller, P. Tran, L. Schmalen, and G. Charlet, “Spectrally Efficient 1-Tb/s Transceivers for Long-haul Optical Systems”, IEEE/OSA Journal of Lightwave Technology, vol. 33, no. 7, pp. 1452-1458, Apr. 2015
- R. Rios-Müller, J. Renaudier, P. Brindel, A. Ghazisaeidi, I. Fernandez, P. Tran, C. Simmoneau, L. Schmalen and G. Charlet, “Spectrally Efficient 400-Gb/s Single Carrier Transport over 7200 km”, IEEE/OSA Journal of Lightwave Technology, vol. 33, no. 7, pp. 1402-1407, Apr. 2015
- L. Schmalen, “A Low-Complexity LDPC Coding Scheme for Channels with Phase Slips”, IEEE/OSA Journal of Lightwave Technology, vol. 33, no. 7, pp. 1319-1325, Apr. 2015
- L. Schmalen, V. Aref, J. Cho, D. Suikat, D. Rösener, and A. Leven, “Spatially Coupled Soft-Decision Forward Error Correction for Future Lightwave Systems”, IEEE/OSA Journal of Lightwave Technology, vol. 33, no. 5, pp. 1109-1116, Mar. 2015
- M. Beermann, E. Monzó, L. Schmalen, and P. Vary, “GPU Accelerated Belief Propagation Decoding of Non-Binary LDPC Codes with Parallel and Sequential Scheduling”, Springer Journal on Signal Processing Systems, vol. 78, no. 1, pp. 21-34, Jan. 2015
- A. Leven and L. Schmalen, “Status and Recent Advances on Forward Error Correction Technologies for Lightwave Systems”, IEEE/OSA Journal of Lightwave Technology, vol. 32, no. 16, pp. 2735-2750, Aug. 2014
- L. Schmalen, A. J. de Lind van Wijngaarden, and S. ten Brink, “Forward Error Correction in Optical Core and Access Networks”, Bell Labs Technical Journal, vol. 18, no. 3, pp. 39-66, Dec. 2013
- L. Schmalen, F. Buchali, A. Leven, and S. ten Brink, “A Generic Tool for Assessing the Soft-FEC Performance in Optical Transmission Experiments”, IEEE Photonics Technology Letters, vol. 24, no. 1, pp. 40-42, Jan. 2012
- L. Schmalen and P. Vary, “Iterative Source-Channel Decoding with Reduced Error Floors”, IEEE Journal of Selected Topics in Signal Processing, vol. 5, no. 8, pp. 1577-1587, Dec. 2011
- A. Leven, F. Vacondio, L. Schmalen, S. ten Brink, and W. Idler, “Estimation of Soft FEC Performance in Optical Transmission Experiments”, IEEE Photonics Technology Letters, vol. 23, no. 20, pp. 1547-1549, Oct. 2011
- L. Schmalen, M. Adrat, T. Clevorn, and P. Vary, “EXIT-Chart Based System Design For Iterative Source-Channel Decoding with Fixed-Length Codes”, IEEE Transactions on Communications, vol. 59, no. 9, pp. 2406-2413, Sep. 2011
- T. Clevorn, L. Schmalen, P. Vary, and M. Adrat: “On Redundant Index Assignments for Iterative Source-Channel Decoding”, IEEE Communications Letters, vol. 12, pp. 514–516, Jul. 2008
Buchkapitel
- A. Graell i Amat and L. Schmalen, “Forward Error Correction for Optical Transponders”, Springer Handbook of Optical Networks, B. Mukherjee, I. Tomkos, M. Tornatore, P. Winzer, and Y. Zhao (editors), Springer, October 2020
- L. Schmalen, S. ten Brink, and A. Leven, “Advances in Detection and Error Correction for Coherent Optical Communications: Regular, Irregular, and Spatially Coupled LDPC Code Designs”, in Enabling Technologies for High Spectral-Efficiency Coherent Optical Communication Networks, C. Xie and X. Zhou (editors), John Wiley & Sons Ltd., Mar. 2016, also available as arXiv:1704.04618
- A. Leven and L. Schmalen, “Implementation Aspects of Coherent Transmit and Receive Functions in Application-Specific Integrated Circuits”, in Optical Fiber Telecommunications VI-A, Ivan P. Kaminow, Tingye Li, and Alan E. Willner (editors), Academic Press, Jun. 2013
- M. Adrat, T. Clevorn, and L. Schmalen, “Iterative Source-Channel Decoding & Turbo DeCodulation”, in Advances in Digital Speech Transmission, R. Martin, U. Heute, and C. Antweiler (editors), John Wiley & Sons, Ltd., Jan. 2008
Konferenzbeiträge (mit peer-review)
- A. Buchberger, C. Häger, H. D. Pfister, L. Schmalen, and A. Graell i Amat, “Learned Decimation for Neural Belief Propagation Decoders ,” submitted to IEEE International Confererence on Acoustics, Speech and Signal Processing (ICASSP), Toronto, Canada, Jun. 2021
- B. Karanov, P. Bayvel, and L. Schmalen, "End-to-end Learning in Optical Fiber Communications: Concept and Transceiver Design," European Conference on Optical Communications (ECOC), Brussels, Belgium (fully virtual), Dec. 2020
– Invited Paper – - B. Karanov, V. Oliari, M. Chagnon, G. Liga, A. Alvarado, V. Aref, D. Lavery, P. Bayvel, and L. Schmalen, "End-to-end Learning in Optical Fiber Communications: Experimental Demonstration and Future Trends," European Conference on Optical Communications (ECOC), Brussels, Belgium (fully virtual), Dec. 2020
– Invited Paper – - T. Eriksson, R. Luis, G. Rademacher, B. Puttnam, K. Gümüs, L. Schmalen, A. Alvarado, H. Furukawa, N. Wada, T. Hirano, M. Sasaki, M. Takeoka, "Challenges in Coding, DSP and Parallel Operation of Quantum Key Distribution and Coherent Data Transmission," European Conference on Optical Communications (ECOC), Brussels, Belgium (fully virtual), Dec. 2020
– Invited Paper – - B. Karanov, M. Chagnon, V. Aref, F. Ferreira, D. Lavery, P. Bayvel, and L. Schmalen, “Experimental Investigation of Deep Learning for Digital Signal Processing in Short Reach Optical Fiber Communications,” IEEE Workshop on Signal Processing Systems (SiPS), Coimbra, Portugal (fully virtual), Oct. 2020
– Invited Paper – - B. Karanov, M. Chagnon, V. Aref, D. Lavery, P. Bayvel, and L. Schmalen, “Optical Fiber Communication Systems Based on End-to-End Deep Learning,” IEEE Photonics Conference (IPC), Special Symposium for Machine Learning in Photonic Systems (SS MLPS), Vancouver, Canada (fully virtual), Sep. 2020
– Invited Paper – - A. Buchberger, C. Häger, H. D. Pfister, L. Schmalen, and A. Graell i Amat, “Pruning Neural Belief Propagation Decoders,” IEEE International Symposium on Information Theory (ISIT), Los Angeles, CA, USA (fully virtual), Jun. 2020
- B. Karanov, M. Chagnon, V. Aref, D. Lavery, P. Bayvel, and L. Schmalen, “Concept and Experimental Demonstration of Optical IM/DD End-to-End System Optimization using a Generative Model,” Optical Fiber Communications Conference (OFC), San Diego, CA, USA, paper Th2A.48, Mar. 2020
- B. Karanov, G. Liga, V. Aref, D. Lavery, P. Bayvel and L. Schmalen, “Deep Learning for Communication over Dispersive Nonlinear Channels: Performance and Comparison with Classical Digital Signal Processing,” 57th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, USA, Nov. 2019
– Invited Paper – - S. Thai Le, K. Schuh, F. Buchali, X.-Q. Du, M. Grözing, M. Berroth, L. Schmalen and H. Bülow, “16x200 Gbps Virtual Carrier Assisted DD Transmission over 80 km with only 14 GHz of Digitizer Bandwidth,” European Conference on Optical Communications (ECOC), Dublin, Ireland, Sep. 2019
- L. Schmalen and V. Aref, “Spatially Coupled LDPC Codes with Non-uniform Coupling for Improved Decoding Speed,” Information Theory Workshop (ITW), Visby, Sweden, Aug. 2019
– Invited Paper – - S. Thai Le, K. Schuh, R. Dischler, F. Buchali, L. Schmalen and H. Bülow, “5x510 Gbps Single-Polarization Direct-Detection WDM Transmission over 80 km of SSMF,” Optical Fiber Communications Conference (OFC), Paper Tu2B.1, San Diego, CA, USA, Mar. 2019
– Invited Paper – - K. Klaiber, S. Cammerer, L. Schmalen and S. ten Brink, “Avoiding Burst-like Error Patterns in Windowed Decoding of Spatially Coupled LDPC Codes,” International Symposium on Turbo Codes & Iterative Information Processing (ISTC), Hong Kong, China, Dec. 2018, also available as arXiv:1810.01137
- M. Chagnon, B. Karanov and L. Schmalen, “Experimental Demonstration of a Dispersion Tolerant End-to-End Deep Learning-based IM-DD Transmission System,” European Conference on Optical Communications (ECOC), Paper Tu4F.6, Rome, Italy, Sep. 2018
- L. Schmalen, “Performance Metrics for Forward Error Correction in Fiber-optic Communication Systems”, European Conference on Optical Communications (ECOC), Paper Th1F.3, Rome, Italy, Sep. 2018
– Invited Paper – - M. Dia, V. Aref and L. Schmalen, “A Compressed Sensing Approach for Disitribution Matching”, IEEE International Symposium on Information Theory (ISIT), Vail, CO, USA, Jun. 2018, also available as arXiv:1804.00602
- L. Schmalen, “Forward Error Correction for Probabilistic Constellation Shaping: Challenges and Opportunities”, Optical Fiber Communications Conference (OFC), Paper M3C.1, San Diego, CA, USA, Mar. 2018
– Invited Paper – - F. Buchali, Q. Hu, M. Chagnon, K. Schuh, L. Schmalen and S. Makovejs, “Flexible Transmission Enabled by Novel M2-QAM Formats with Record Distance - Spectral Efficiency Tuneability”, Optical Fiber Communications Conference (OFC), Paper W2A.54, San Siego, CA, USA, Mar. 2018
- J. Cho, L. Schmalen and P. Winzer, “Normalized Generalized Mutual Information as a Forward Error Correction Threshold for Probabilistically Shaped QAM”, European Conference on Optical Communications (ECOC), Paper M.2.D.2, Göteborg, Sweden, Sep. 2017
- O. Ait Saib, Y. Fernandez de Jauregui Ruiz, A. Ghazisaeidi, P. Plantady, A. Calsat, S. Bubost, L. Schmalen, J. Renaudier, V. Letellier, “Near Capacity 24.6 Tb/s Transmission over 10,285km Straight Line Testbed at 5.9 b/s/Hz Spectral Efficiency Using TPCS-64QAM and C-Band EDFA-Only”, European Conference on Optical Communications (ECOC), Paper Tu.1.E.2, Göteborg, Sweden, Sep. 2017
- F. Buchali, W. Idler, R. Dischler, T. A. Eriksson, and L. Schmalen, “Spectrally Efficient Probabilistically Shaped Square 64QAM to 256QAM”, European Conference on Optical Communications (ECOC), Paper Tu.2.D.1, Göteborg, Sweden, Sep. 2017
- T. A. Eriksson, M. Chagnon, F. Buchali, K. Schuh, S. ten Brink and L. Schmalen, “56 Gbaud Probabilistically Shaped PAM8 for Data Center Interconnects”, European Conference on Optical Communications (ECOC), Paper Tu.2.D.4, Göteborg, Sweden, Sep. 2017
- Q. Hu, R. Dischler, K. Schuh, H. Bülow, L. Schmalen and F. Buchali, “Beating Bandwidth Limitation for High-speed PAM-4 Transmission Based on Turbo Equalizer”, European Conference on Optical Communications (ECOC), Paper P1.SC3.50, Göteborg, Sweden, Sep. 2017
- L. Schmalen, T. A. Eriksson, F. Buchali, R. Dischler, and U. Gebhard, “Distributed Transmission and Spatially Coupled Forward Error Correction in Regenerative Multipoint-to-Point Networks”, European Conference on Optical Communications (ECOC), Paper P1.SC3.52, Göteborg, Sweden, Sep. 2017
- Q. Hu, F. Buchali, L. Schmalen, W. Idler, R. Dischler, V. Aref and H. Bülow, “Inter-Channel Crosstalk Compensation for Time-Frequency Packing Systems”, European Conference on Optical Communications (ECOC), Paper W.3.E.4, Göteborg, Sweden, Sep. 2017
- A. Alvarado, G. Liga, T. Fehenberger and L. Schmalen, “On the Design of Coded Modulation for Fiber Optical Communications”, Workshop on Signal Processing in Photonic Communications (SPPCom), Part of Advanced Photonics, Paper SpM4F.2, New Orleans, LA, USA
– Invited Paper – - Q. Hu, F. Buchali, L. Schmalen and H. Bülow, “Experimental Demonstration of Probabilistically Shaped QAM”, Workshop on Signal Processing in Photonic Communications (SPPCom), Part of Advanced Photonics, Paper SpM2F.6, New Orleans, LA, USA
– Invited Paper – - L. Schmalen, V. Aref and F. Jardel, “Non-Uniformly Coupled LDPC Codes: Better Thresholds, Smaller Rate-loss, and Less Complexity”, IEEE International Symposium on Information Theory (ISIT), Aachen, Germany, Jun. 2017, also available as arXiv:1701.07629
- F. Buchali, W. Idler, L. Schmalen, “Probabilistic Shaping: A Technique for Reach Extension of QAM Systems with Superior Flexibility”, ITG-Fachtagung Photonische Netze (Fachgruppe 5.3), Leipzig, Germany, May 2017
- J. Cho, X. Chen, S. Chandrasekhar, G. Raybon, R. Dar, L. Schmalen, E. Burrows, A. Adamiecki, S. Corteselli, Y. Pan, D. Correa, B. McKay, S. Zsigmond, P. Winzer, and S. Grubb, “Trans-Atlantic Field Trial Using Probabilistically Shaped 64-QAM at High Spectral Efficiencies and Single-Carrier Real-Time 250-Gb/s 16-QAM”, Optical Fiber Communications Conference (OFC), Paper Th5B.3, Los Angeles, CA, USA, Mar. 2017
- K. Schuh, F. Buchali, W. Idler, T. A. Eriksson, L. Schmalen, W. Templ, L. Altenhain, U. Dümler, R. Schmid, M. Möller, and K. Engenhardt, “Single Carrier 1.2 Tbit/s Transmission over 300 km with PM-64 QAM at 100 GBaud”, Optical Fiber Communications Conference (OFC), Paper Th5B.5, Los Angeles, CA, USA, Mar. 2017
- G. Charlet, A, Ghazisaeidi, R. Rios-Müller, J. Renaudier and L. Schmalen, “Signal Processing for Spectrally Efficient Systems”, Optical Fiber Communications Conference (OFC), Paper Th4C.5, Los Angeles, CA, USA, Mar. 2017
– Invited Paper – - T. A. Eriksson, F. Buchali, and L. Schmalen, “Nonlinear Mitigation using Probabilistically Shaped Real-Valued Modulation Formats”, Optical Fiber Communications Conference (OFC), Paper Th2A.61, Los Angeles, CA, USA, Mar. 2017
- T. A. Eriksson, F. Buchali, W. Idler, and L. Schmalen, “Electronically Subcarrier Multiplexed PM-32QAM with Optimized FEC Overhead”, Optical Fiber Communications Conference (OFC), Paper W3J.4, Los Angeles, CA, USA, Mar. 2017
- L. Schmalen, L. M. Zhang, and U. Gebhard, “Distributed Rate-Adaptive Staircase Codes for Connectionless Optical Metro Networks”, Optical Fiber Communications Conference (OFC), Paper W1J.2, Los Angeles, CA, USA, Mar. 2017
- Q. Hu, F. Buchali, L. Schmalen, W. Idler, R. Dischler, V. Aref and H. Bülow, “Transmit Filter Optimization for Improved Performance of Time-Frequency Packing Systems”, Optical Fiber Communications Conference (OFC), Paper Tu3D.5, Los Angeles, CA, USA, Mar. 2017
- F. Buchali, W. Idler, L. Schmalen and Q. Hu, “Flexible Optical Transmission close to the Shannon Limit by Probabilistically Shaped QAM”, Optical Fiber Communications Conference (OFC), Paper M3C.3, Los Angeles, CA, USA, Mar. 2017
– Invited Paper – - L. Zhang and L. Schmalen, “Feed-Forward Staircase Codes”, International ITG Conference on Systems, Communications and Coding (SCC), Hamburg, Germany, Feb. 2017, also available as arXiv:1604.06574v2
- S. Cammerer, L. Schmalen, V. Aref and S. ten Brink, “Wave-like Decoding of Tail-biting Spatially Coupled LDPC Codes Through Iterative Demapping”, International Symposium on Turbo Codes & Iterative Information Processing (ISTC), Brest, France, Sep. 2016
- V. Aref, N. Rengaswamy and L. Schmalen, “Spatially Coupled LDPC Codes Affected by a Single Random Burst of Erasures”, International Symposium on Turbo Codes & Iterative Information Processing (ISTC), Brest, France, Sep. 2016
- A. Ghazisaeidi, I. Fernandez de Jaregui Ruiz, R. Rios-Müller, L. Schmalen, P. Tran, P. Brindel, A. Carbo Meseguer, Q. Hu, F. Buchali, G. Charlet and J. Renaudier, “65Tb/s Transoceanic Transmission Using Probabilistically-Shaped PDM-64QAM”, European Conference on Optical Communications (ECOC), Düsseldorf, Germany, Sep. 2016
- W. Idler, F. Buchali, L. Schmalen, E. Lach, R.-P. Braun, G. Böcherer, P. Schulte and F. Steiner, “Field Demonstration of 1 Tbit/s Super-Channel Network Using Probabilistically Shaped Constellations”, European Conference on Optical Communications (ECOC), Düsseldorf, Germany, Sep. 2016
- L. Schmalen and F. Buchali, “Implicit Constellation Shaping in Regenerative Optical Networks”, European Conference on Optical Communications (ECOC), Düsseldorf, Germany, Sep. 2016
- L. Schmalen, D. Suikat, V. Aref and D. Rösener, “On the Design of Capacity-Approaching Unit-Memory Spatially Coupled LDPC Codes for Optical Communications”, European Conference on Optical Communications (ECOC), Düsseldorf, Germany, Sep. 2016
- Q. Hu, F. Buchali, L. Schmalen, W. Idler, R. Dischler and H. Bülow, “Improved Flexibility in Rate and Reach by Time-Frequency Packed QPSK”, European Conference on Optical Communications (ECOC), Düsseldorf, Germany, Sep. 2016
- R. Dischler, F. Buchali and L. Schmalen, “Embedded In-Band DQPSK Signaling within n-QAM Data Transmission”, European Conference on Optical Communications (ECOC), Düsseldorf, Germany, Sep. 2016
- F. Buchali, W. Idler, K. Schuh, L. Schmalen, G. Böcherer, F. Steiner, P. Schulte and T. A. Eriksson, “Study of Electrical Subband Multiplexing at 54 GHz Modulation Bandwidth for 16QAM and Probabilistically Shaped 64QAM”, European Conference on Optical Communications (ECOC), Düsseldorf, Germany, Sep. 2016
- F. Buchali, W. Idler, L. Schmalen, G. Böcherer, P. Schulte and F. Steiner, “Probabilistically Shaped QAM for Independent Reach, Spectral Efficiency and Bit-rate Adaptation”, European Conference on Optical Communications (ECOC), Düsseldorf, Germany, Sep. 2016
- S. Cammerer, V. Aref, L. Schmalen and S. ten Brink, “Wave-Like Convergence of Tail-biting Spatially Coupled LDPC Codes”, Conference on Information Sciences and Systems (CISS), Princeton, NJ, USA, Mar. 2016, also available as arXiv:1507.01970v2
- L. Schmalen, A. Alvarado, and R. Rios-Müller, “Predicting the Performance of Nonbinary Forward Error Correction in Optical Transmission Experiments”, Optical Fiber Communications Conference (OFC), Anaheim, CA, USA, Mar. 2016
- R. Rios-Müller, J. Renaudier, L. Schmalen and G. Charlet, “Practical Approaches to 400G Single-Carrier Submarine Transmission”, Optical Fiber Communications Conference (OFC), Paper Th1B.4, Anaheim, CA, USA, Mar. 2016
– Invited Paper – - N. Rengaswamy, L. Schmalen, and V. Aref, “On the Burst Erasure Correctability of Spatially Coupled LDPC Ensembles”, International Zurich Seminar on Communications (IZS), Zurich, CH, Mar. 2016
- L. Schmalen, D. Suikat, D. Rösener, and V. Aref, “Next-Generation Forward Error Correction: Can We Close the Gap to the Shannon Limit?”, Asia Communications and Photonics Conference (ACP), Hong Kong, Nov. 2015
– Invited Paper – - L. Schmalen, “Novel Forward Error Correction Concepts for Coherent Optical Communications”, IEEE Photonics Conference (IPC), Reston, VA, USA, Paper MG4.4, Oct. 2015
– Invited Paper – - F. Buchali, G. Böcherer, W. Idler, L. Schmalen, P. Schulte, and F. Steiner, “Experimental Demonstration of Capacity Increase and Rate-Adaptation by Probabilistically Shaped 64-QAM”, European Conference on Optical Communications (ECOC), Valencia, Spain, Paper PDP3.4, Sep. 2015, also available as arXiv:1509.08836
- F. Buchali, L. Schmalen, Q. Hu, and D. Che, “Low Latency Digital Regenerator for Dual Polarization QAM Signals”, European Conference on Optical Communications (ECOC), Valencia, Spain, Paper Mo.3.3.5, Sep. 2015
- R. Rios-Müller, J. Renaudier, L. Schmalen, and G. Charlet, “Experimental Comparison between Sub-band Single-Carrier and Superchannel for 400 Gb/s and 800 Gb/s Transport”, European Conference on Optical Communications (ECOC), Valencia, Spain, Paper Tu.1.4.4, Sep. 2015
- A. Ghazisaeidi, L. Schmalen, P. Tran, C. Simmoneau, E. Awwad, B. Uscumlic, P. Brindel, and G. Charlet, “54.2 Tb/s Transoceanic Transmission Using Ultra Low Loss Fiber, Multi-rate FEC and Digital Nonlinear Mitigation”, European Conference on Optical Communications (ECOC), Valencia, Spain, Paper Th.2.2.3, Sep. 2015
- L. Schmalen, D. Suikat, D. Rösener, V. Aref, A. Leven, and S. ten Brink, “Spatially Coupled Codes and Optical Fiber Communications: An Ideal Match?”, IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Special Session on Signal Processing, Coding, and Information Theory for Optical Communications, Stockholm, Sweden, Jun. 2015, arXiv:1505.05405
- J. Cho and L. Schmalen, “Construction of Protographs for Large-Girth Structured LDPC Convolutional Codes”, International Conference on Communications (ICC), London, UK, Jun. 2015
- R. Rios-Müller, J. Renaudier, P. Brindel, H. Mardoyan, P. Jennevé, L. Schmalen, and G. Charlet, “1-Terabit/s Net Data-Rate Transceiver Based on Single-Carrier Nyquist-Shaped 124 GBaud PDM-32QAM”, Optical Fiber Communications Conference (OFC), Los Angeles, CA, USA, Paper Th5B.1, Mar. 2015
- J. Renaudier, R. Rios-Müller, L. Schmalen, and G. Charlet, “Spectrally Efficient 1 Tb/s Transceivers”, Optical Fiber Communications Conference (OFC), Los Angeles, CA, USA, Paper M2G.3, Mar. 2015
– Invited Paper – - H. Mardoyan, R. Rios-Müller, M. A. Mestre, P. Jennevé, L. Schmalen, A. Ghazisaeidi, P. Tran, S. Bigo, and J. Renaudier, “Transmission of Single-Carrier Nyquist-Shaped 1-Tb/s Line-Rate Signal over 3,000km”, Optical Fiber Communications Conference (OFC), Los Angeles, CA, USA, Paper W3G.2, Mar. 2015
- L. Schmalen, S. ten Brink, and A. Leven, “Spatially Coupled LDPC Protograph Codes for Universal Phase Slip-Tolerant Differential Decoding”, Optical Fiber Communications Conference (OFC), Los Angeles, CA, USA, Paper Th3E.6, Mar. 2015
- F. Buchali, W. Idler, L. Schmalen, K. Schuh, and H. Bülow, “Performance and Advantages of 100 Gb/s QPSK/8QAM Hybrid Modulation Formats”, Optical Fiber Communications Conference (OFC), Los Angeles, CA, USA, Paper Th2A.16, Mar. 2015
- W. Idler, F. Buchali, L. Schmalen, K. Schuh, and H. Bülow, “Hybrid Modulation Formats Outperforming 16QAM and 8QAM in Transmission Distance and Filtering with Cascaded WSS”, Optical Fiber Communications Conference (OFC), Paper M3G.4, Los Angeles, CA, USA, Mar. 2015
- R. Rios-Müller, J. Renaudier, L. Schmalen, and G. Charlet, “Joint Coding Rate and Modulation Format Optimization for 8QAM Constellations Using BICM Mutual Information”, Optical Fiber Communications Conference (OFC), Los Angeles, CA, USA, Paper W3K.4, Mar. 2015
- A. Ghazisaeidi, L. Schmalen, I. Fernandez de Jauregui, P. Tran, C. Simonneau, P. Brindel, and G. Charlet, “52.9 Tb/s Transmission over Transoceanic Distances using Adaptive Multi-Rate FEC”, European Conference on Optical Communications (ECOC), Cannes, France, Paper PD.3.4, Sep. 2014
- R. Rios-Müller, J. Renaudier, P. Brindel, C. Simonneau, P. Tran, A. Ghazisaeidi, I. Fernandez, L. Schmalen, and G. Charlet, “Optimized Spectrally Efficient Transceiver for 400-Gb/s Single Carrier Transport”, European Conference on Optical Communications (ECOC), Cannes, France, Paper PD.4.2, Sep. 2014
- L. Schmalen, V. Aref, J. Cho and K. Mahdaviani, “Next Generation Error Correcting Codes for Lightwave Systems”, European Conference on Optical Communications (ECOC), Cannes, France, Th.1.3.3, Sep. 2014
– Invited Paper – - L. Schmalen, “Low-Complexity Phase Slip Tolerant LDPC-based FEC Scheme”, European Conference on Optical Communications (ECOC), Cannes, France, Paper Th.2.3.2, Sep. 2014
- L. Schmalen, D. Suikat, D. Rösener, and A. Leven, “Evaluation of Left-Terminated Spatially Coupled Codes for Optical Communications”, European Conference on Optical Communications (ECOC), Cannes, France, Paper Th.2.3.4, Sep. 2014
- C. R. Müller, A. Leven, H. Bülow, L. Schmalen, G. Leuchs and C. Marquardt, “M-ary Phase Shift Keying Receiver Beating the Standard Quantum Limit for any Signal Power”, European Conference on Optical Communications (ECOC), Cannes, France, Paper P.8.3, Sep. 2014
- F. Buchali, L. Schmalen, K. Schuh and W. Idler, “Optimization of Time-Division Hybrid-Modulation and its Application to Rate Adaptive 200Gb Transmission”, European Conference on Optical Communications (ECOC), Cannes, France, Paper Tu.4.3.1, Sep. 2014
- J. Renaudier, R. Rios-Müller, L. Schmalen, P. Tran, P. Brindel and G. Charlet, “1-Tb/s PDM-32QAM Superchannel Transmission at 6.7-b/s/Hz over SSMF and 150-GHz-Grid ROADMs”, European Conference on Optical Communications (ECOC), Cannes, France, Paper Tu.3.3.4, Sep. 2014
- L. Schmalen and K. Mahdaviani, “Laterally Connected Spatially Coupled Code Chains for Transmission over Unstable Parallel Channels”, International Symposium on Turbo Codes & Iterative Information Processing (ISTC), Bremen, Germany, Aug. 2014
- L. Schmalen, “Energy Efficient FEC for Optical Transmission Systems”, Optical Fiber Communications Conference (OFC), San Francisco, CA, USA, Paper M3A.1, Mar. 2014
– Invited Paper – - F. Buchali, L. Schmalen, A. Klekamp, K. Schuh, and A. Leven, “5 x 50Gb/s WDM Transmission of 32GBaud DP 3 PSK over 36,000 km Fiber with Spatially Coupled LDPC Coding”, Optical Fiber Communications Conference (OFC), San Francisco, CA, USA, Mar. 2014, Paper, W1A.1
- F. Buchali, A. Klekamp, L. Schmalen, and T. Drenski, “Implementation of 64QAM at 42.66 GBaud Using 1.5 Samples per Symbol DAC and Demonstration of up to 300 km Fiber Transmission”, Optical Fiber Communications Conference (OFC), San Francisco, CA, USA, Mar. 2014, Paper M2A.1
- H. Bülow, X. Lu, L. Schmalen, A. Klekamp, and F. Buchali, “Experimental Performance of 4D Optimized Constellation Alternatives for PM-8QAM and PM-16QAM”, Optical Fiber Communications Conference (OFC), San Francisco, CA, USA, Mar. 2014, Paper M2A.6
- H. Bülow, X. Lu, and L. Schmalen, “Experimental Analysis of Transmission and Soft Decoding of Optimized 4D Constellations”, Asia Communications and Photonics Conference (ACP), Beijing, China, Nov. 2013
- V. Aref, L. Schmalen, and S. ten Brink, “On the Convergence Speed of Spatially Coupled LDPC Ensembles”, Allerton Conference on Communications, Control, and Computing, Monticello, IL, USA, Oct. 2013, arXiv:1307.3780
- M. Beermann, E. Monzó, L. Schmalen, and P. Vary, “High Speed Decoding of Non-Binary Irregular LDPC Codes Using GPUs”, IEEE Workshop on Signal Processing Systems (SiPS), Taipei, Taiwan, Oct. 2013
– Bob Owens Best Student Paper Award – - H. Bülow, X. Lu, and L. Schmalen, “Experimental Analysis of Single Carrier POLQAM (6Pol-QPSK) Transmission with Soft-Decoding”, European Conference on Optical Communications (ECOC), London, UK, Sep. 2013
- R. Dischler and L. Schmalen, “Transmission of a 1.1 Tb/s Super Channel in 100 GHz Optical Bandwidth Based on PM-256 QAM and Spatially Coupled FEC”, European Conference on Optical Communications (ECOC), London, UK, Sep. 2013
- A. Leven and L. Schmalen, “Status and Recent Advances on Forward Error Correction Technologies for Lightwave Systems”, European Conference on Optical Communications (ECOC), London, UK, Sep. 2013
− Invited Tutorial − - J. Renaudier, R. Rios-Muller, L. Schmalen, M. Salsi, P. Tran, G. Charlet, and S. Bigo, “1-Tb/s Transceiver Spanning over just Three 50-GHz Frequency Slots for Long-Haul Systems”, Paper PD2.D.5, European Conference on Optical Communications (ECOC), London, UK, Sep. 2013
- M. Salsi, R. Rios-Muller, J. Renaudier, P. Tran, L. Schmalen, A. Ghazisaeidi, H. Mardoyan, P. Brindel, G. Charlet, and S. Bigo, “38.75 Tb/s Transmission Experiment over Transoceanic Distance”, Paper PD2.E.2, European Conference on Optical Communications (ECOC), London, UK, Sep. 2013
- M. Salsi, A. Ghazisaeidi, P. Tran, R. Rios Muller, L. Schmalen, J. Renaudier, H. Mardoyan, P. Brindel, G. Charlet, and S. Bigo, “31 Tb/s Transmission over 7,200km using 46GBaud PDM-8QAM with Optimized Error Correcting Code Rate”, Optoelectronics and Communications Conference (OECC), Kyoto, Japan, Jul. 2013
- F. Buchali, K. Schuh, L. Schmalen, W. Idler, E. Lach, and A. Leven, “1-Tbit/s dual-carrier DP 64QAM transmission at 64Gbaud with 40% overhead soft-FEC over 320km SSMF”, Optical Fiber Communications Conference (OFC), Anaheim, CA, USA, Mar. 2013
- L. Schmalen and S. ten Brink, “Combining Spatially Coupled Codes with Modulation and Detection”, International ITG Conference on Systems, Communications and Coding (SCC), Munich, Germany, Jan. 2013
- L. Schmalen, M. Adrat, T. Clevorn, and P. Vary, “Windowed Iterative Source-Channel Decoding with Delay Constraints”, International Symposium on Turbo Codes & Iterative Information Processing (ISTC), Gothenburg, Sweden, Aug. 2012
- L. Schmalen, S. ten Brink, and A. Leven, “Analysis and Optimization of Iteration Schedules for LDPC Coded Modulation and Detection”, International Symposium on Turbo Codes & Iterative Information Processing (ISTC), Gothenburg, Sweden, Aug. 2012
- L. Schmalen, G. Lechner, S. ten Brink, and A. Leven, “On Threshold Prediction of Low-Density Parity-Check Codes With Structure”, Conference on Information Sciences and Systems (CISS), Princeton, NJ, USA, Mar. 2012
- F. Buchali, K. Schuh, D. Rösener, E. Lach, R. Dischler, W. Idler, L. Schmalen, A. Leven, R.-P. Braun, A. Erhardt, C. Gerlach, L. Schürer, “512 Gb/s DP-16-QAM Field Trial over 734 km Installed SSMF with Co-Propagating 10 Gb/s NRZ Neighbors Incorporating Soft-FEC Decoding”, Optical Fiber Communications Conference (OFC), Los Angeles, CA, USA, Mar. 2012
- L. Schmalen and R. Dischler, “Experiments Evaluation of Coded Modulation for a Coherent PDM System with High Spectral Efficiency”, Optical Fiber Communications Conference (OFC), Los Angeles, CA, USA, Mar. 2012
- Y. Chen, L. Schmalen, H, Bülow, A. Leven, and S. ten Brink, “Space-Time Coding Schemes for Optical MIMO”, European Conference on Optical Communications (ECOC), Paper Tu.6.A.1, Geneva, CH, Sep. 2011
- L. Schmalen, M. Tschauner, T. Breddermann, and P. Vary, “Novel Iterative Multiple Description Coding for Correlated Sources”, European Signal Processing Conference (EUSIPCO), Barcelona, Spain, Aug. 2011
- M. Beermann, L. Schmalen, and P. Vary, “Improved Decoding of Binary and Non-Binary LDPC by Probabilistic Shuffled Belief Propagation”, IEEE International Conference on Communications (ICC), Kyoto, Japan, Jun. 2011
- L. Schmalen and P. Vary, “Reconstruction of Multiple Descriptions by MMSE Estimation”, ITG Conference on Speech Communication, Bochum, Germany, Oct. 2010
- L. Schmalen, P. Vary, T. Clevorn, and M Adrat, “Turbo Source Compression with Jointly Optimized Inner Irregular and Outer Irregular Codes”, IEEE Vehicular Technology Conference (VTC Fall), Ottawa, Canada, Sep. 2010
- T. Clevorn, L. Schmalen, P. Vary, and M. Adrat, “Hybrid ARQ with Incremental Redundant Index Assignments for Iterative Source-Channel Decoding”, IEEE International Conference on Communications (ICC), Cape Town, South Africa, May 2010
- M. Adrat, M. Antweiler, L. Schmalen, P. Vary, and T. Clevorn, “On the Overshooting Effect in EXIT Charts of Iterative Source-Channel Decoding”, IEEE International Conference on Communications (ICC), Cape Town, South Africa, May 2010
- L. Schmalen and P. Vary, “Error Resilient Turbo Compression of Source Codec Parameters Using Inner Irregular Codes”, International ITG Conference on Source and Channel Coding (SCC), Siegen, Germany, Jan. 2010
- L. Schmalen, T. Schlien, and P. Vary, “The FlexCode Source-Channel Coding Approach for Audio and Speech Transmission”, International ITG Conference on Source and Channel Coding (SCC), Siegen, Germany, Jan. 2010
- L. Schmalen and P. Vary, “Near-Lossless Compression and Protection by Turbo Source-Channel (De-) Coding Using Irregular Index Assignments”, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Taipei, Taiwan, Apr. 2009
- H. Lüders, B. Eschbach, L. Schmalen, and P. Vary, “OFDM Turbo DeCodulation with EXIT Optimized Bit Loading and Signal Constellations”, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Taipei, Taiwan, Apr. 2009
- L. Schmalen, P. Vary, and M. Adrat, “Reduced-Search Source Decoders for Iterative Source-Channel Decoding”, ITG Conference on Speech Communication, Aachen, Germany, Oct. 2008
- L. Schmalen, B. Schotsch, M. Jeub, P. Vary, and T. Clevorn, “The FlexCode Channel Coding Approach”, ITG Conference on Speech Communication, Aachen, Germany, Oct. 2008
- T. Clevorn, L. Schmalen, P. Vary, and M. Adrat, “Iterative Source-Channel Decoding: Design of Redundant Index Assignments”, ITG Conference on Speech Communication, Aachen, Germany, Oct. 2008
- L. Schmalen, P. Vary, M. Adrat, and T. Clevorn, “Complexity-Reduced Iterative Source-Channel Decoding by Conditional Quantization”, International Symposium on Turbo Codes & Related Topics (ISTC), Lausanne, CH, Sep. 2008
- R. Thobaben, L. Schmalen, and P. Vary, “Joint Source-Channel Coding with Inner Irregular Codes”, in IEEE International Symposium on Information Theory (ISIT), Toronto, Canada, Jul. 2008
- B. Schotsch, L. Schmalen, P. Vary, and T. Clevorn, “Graph-Based Turbo DeCodulation with LDPC Codes”, Vehicular Technology Conference (VTC Spring), Singapore, May 2008
- L. Schmalen, P. Vary, T. Clevorn, and B. Schotsch, “Efficient Iterative Source-Channel Decoding Using Irregular Index Assignments”, International ITG Conference on Source and Channel Coding (SCC), Ulm, Germany, Jan. 2008
- H. Lüders, L. Schmalen, and P. Vary, “Approximating EXIT Characteristics of Soft Demodulators in OFDM BICM-ID Systems for Time Variant Frequency Selective Fading Channels”, International ITG Conference on Source and Channel Coding (SCC), Ulm, Germany, Jan. 2008
- L. Schmalen, P. Vary, M. Adrat, and T. Clevorn, “On the EXIT Characteristics of Feed Forward Convolutional Codes”, IEEE International Symposium on Information Theory (ISIT), Nice, France, Jun. 2007
- L. Schmalen, T. Clevorn, and P. Vary, “Iterative Source-Coded Equalization: Turbo Error Concealment for ISI Channels”, IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Helsinki, Finland, Jun. 2007
- T. Clevorn, L. Schmalen, P. Vary, and M. Adrat, “On the Optimum Performance Theoretically Attainable for Scalarly Quantized Correlated Sources”, International Symposium on Information Theory and its Applications (ISITA), Seoul, Korea, Oct. 2006
- T. Clevorn, B. Schotsch, L. Schmalen, P. Vary, and M. Adrat, “Separation of Recursive Convolutional Codes into Sub-Codes using Galois Field Arithmetic”, Conference on Information Sciences and Systems (CISS), Princeton, NJ, USA, Mar. 2006
- L. Schmalen and M. Adrat, “An Iterative, Turbo-like Approach to Convolutional Decoding”, 9th International Student Conference on Electrical Engineering, Prague, Czech Republic, May 2005