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 schmalenQab3∂kit edu
Geb.06.45, Hertzstr. 16, D-76187 Karlsruhe
Lebenslauf
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 |
| Seit 2019 | Professor am KIT und Leiter des Instituts für Nachrichtentechnik |
Arbeitsgebiete
- Kanalcodierung und codierte Modulation
- Hochgeschwindigkeitsdatenübertragung
- 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
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]
Preise & Auszeichnungen
| 2021 | Teilnahme am Indo-German Frontiers of Engineering Symposium (INDOGFOE) der Alexander von Humboldt-Stiftung |
| 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 |
Eingeladene Vorträge
| Mar. 2021 | IKS Forum an der RWTH Aachen University, Aachen, Deutschland "Improving Communication Systems Using Machine Learning" |
| 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
- A. Buchberger, C. Häger, H. D. Pfister, L. Schmalen and A. Graell i Amat, "Pruning and quantizing neural belief propagation decoders," IEEE J. Sel. Areas Commun., vol. 39, no. 7, pp. 1957–1966, Jul. 2021, https://arxiv.org/abs/2011.13594
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K. Gümüs, T. A. Eriksson, M. Takeoka, M. Fujiwara, M. Sasaki, L. Schmalen and A. Alvarado, "A novel error correction protocol for continuous variable quantum key distribution," Nature Scientific Reports, vol. 11, no. 10465, May. 2021
[ Available here ] - S. Le, K. Schuh, F. Buchali, X. Du, M. Grözing, M. Berroth, L. Schmalen and H. Bülow, "Single Sideband Transmission Employing a 1-to-4 ADC Frontend and Parallel Digitization," J. Lightw. Technol., vol. 38, no. 12, pp. 3125–3134, Jun. 2020
- A. Teixeira, D. Lavery, E. Ciaramella, L. Schmalen, N. Iiyama, R. Ferreira and S. Randel, "DSP Enabled Optical Detection Techniques for PON," J. Lightw. Technol., vol. 38, no. 3, pp. 684–695, Feb. 2020
- S. Le, K. Schuh, R. Dischler, F. Buchali, L. Schmalen and H. Bülow, "Beyond 400 Gb/s Direct Detection Over 80 km for Data Center Interconnect Applications," J. Lightw. Technol., vol. 38, no. 2, pp. 538–545, 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, pp. 141161–141170, Oct. 2019, https://arxiv.org/abs/1903.03128
- B. Karanov, D. Lavery, P. Bayvel and L. Schmalen, "End-to-end optimized transmission over dispersive intensity-modulated channels using bidirectional recurrent neural networks," Optics Express, vol. 27, no. 14, pp. 19650–19663, Jul. 2019, https://arxiv.org/abs/1901.08570
- B. Karanov, M. Chagnon, F. Thouin, T. Eriksson, H. Bülow, D. Lavery, P. Bayvel and L. Schmalen, "End-to-end Deep Learning of Optical Fiber Communications," J. Lightw. Technol., vol. 36, no. 20, pp. 4843–4855, Oct. 2018, https://arxiv.org/abs/1804.04097
- A. Buchberger, A. i Amat, V. Aref and L. Schmalen, "Probabilistic eigenvalue shaping for nonlinear Fourier transform transmission," J. Lightw. Technol., vol. 36, no. 20, pp. 4799–4807, Oct. 2018, https://arxiv.org/abs/1712.08467
- V. Aref, N. Rengaswamy and L. Schmalen, "Finite-length analysis of spatially-coupled regular LDPC ensembles on burst-erasure channels," IEEE Trans. Inf. Theory, vol. 64, no. 5, pp. 3431–3449, May. 2018, https://arxiv.org/abs/1611.08267
- H. Bülow, V. Aref and L. Schmalen, "Modulation on discrete nonlinear spectrum: Perturbation sensitivity and achievable rates," IEEE Photon. Technol. Lett., vol. 30, no. 5, pp. 423–426, Mar. 2018
- I. de Jauregui Ruiz, A. Ghazisaeidi, O. Sab, P. Plantady, A. Calsat, S. Dubost, L. Schmalen, V. Letellier and J. Renaudier, "25.4-Tb/s transmission over transpacific distances using truncated probabilistically shaped PDM-64QAM," J. Lightw. Technol., 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. 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," J. Lightw. Technol., vol. 36, no. 1, pp. 103–113, Jan. 2018
- W. Lautenschlaeger, N. Benzaoui, F. Buchali, L. Dembeck, R. Dischler, B. Franz, U. Gebhard, J. Milbrandt, Y. Pointurier, D. Roesener, L. Schmalen and A. Leven, "Optical Ethernet—Flexible Optical Metro Networks," J. Lightw. Technol., vol. 35, no. 12, pp. 2346–2357, Jun. 2017
- W. Idler, F. Buchali, L. Schmalen, E. Lach, R. Braun, G. Böcherer, P. Schulte and F. Steiner, "Field trial of a 1 Tb/s super-channel network using probabilistically shaped constellations," J. Lightw. Technol., vol. 35, no. 8, pp. 1399–1406, Apr. 2017
- A. Ghazisaeidi, I. de Jauregui Ruiz, R. Rios-Müller, L. Schmalen, P. Tran, P. Brindel, A. Meseguer, Q. Hu, F. Buchali, G. Charlet and J. Renaudier, "Advanced C+L-band transoceanic transmission systems based on probabilistically shaped PDM-64QAM," J. Lightw. Technol., vol. 35, no. 7, pp. 1291–1299, Apr. 2017
- L. Schmalen, A. Alvarado and R. Rios-Müller, "Performance prediction of nonbinary forward error correction in optical transmission experiments," J. Lightw. Technol., vol. 35, no. 4, pp. 1015–1027, Feb. 2017, https://arxiv.org/abs/1606.00755
- A. Ghazisaeidi, I. de Jauregui Ruiz, 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," J. Lightw. Technol., 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," J. Lightw. Technol., vol. 34, no. 7, pp. 1599–1609, Apr. 2016
- C. Pan, H. Bülow, W. Idler, L. Schmalen and F. Kschischang, "Optical Nonlinear Phase Noise Compensation for 9x32-Gbaud PolDM-16 QAM Transmission Using a Code-Aided Expectation-Maximization Algorithm," J. Lightw. Technol., vol. 33, no. 17, pp. 3679–3686, Sep. 2015
- J. Renaudier, R. Rios-Müller, P. Tran, P. Schmalen and G. Charlet, "Spectrally efficient 1-Tb/s transceivers for long-haul optical systems," J. Lightw. Technol., vol. 33, no. 7, pp. 1452–1458, Apr. 2015
- A. Ghazisaeidi, L. Schmalen, I. de Jauregui Ruiz, P. Tran, C. Simonneau, P. Brindel and G. Charlet, "Transoceanic transmission systems using adaptive multirate FECs," J. Lightw. Technol., vol. 33, no. 7, pp. 1479–1487, Apr. 2015
- L. Schmalen, "A low-complexity LDPC coding scheme for channels with phase slips," J. Lightw. Technol., vol. 33, no. 7, pp. 1319–1325, Apr. 2015
- R. Rios-Müller, J. Renaudier, P. Brindel, A. Ghazisaeidi, I. Fernandez, P. Tran, C. Simonneau, L. Schmalen and G. Charlet, "Spectrally-efficient 400-Gb/s single carrier transport over 7 200 km," J. Lightw. Technol., vol. 33, no. 7, pp. 1402–1407, Apr. 2015
- L. Schmalen, V. Aref, J. Cho, D. Suikat, D. Rösener and A. Leven, "Spatially coupled soft-decision error correction for future lightwave systems," J. Lightw. Technol., vol. 33, no. 5, pp. 1109–1116, Mar. 2015
- M. Beermann, E. Monzo, L. Schmalen and P. Vary, "GPU accelerated belief propagation decoding of non-binary LDPC codes with parallel and sequential scheduling," Journal of 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," J. Lightw. Technol., vol. 32, no. 16, pp. 2735–2750, Aug. 2014
- L. Schmalen, A. van Wijngaarden and S. ten Brink, "Forward error correction in optical core and optical 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 Photon. Technol. Lett., vol. 24, no. 1, pp. 40–42, Jan. 2012
- L. Schmalen and P. Vary, "Iterative source-channel decoding with reduced error floors," IEEE J. Sel. Topics Signal Process., 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 Photon. Technol. Lett., 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 Trans. Commun., 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 Commun. Lett., vol. 12, no. 7, pp. 514–516, Jul. 2008
Buchkapitel
- A. Graell i Amat and L. Schmalen, "Forward error correction for optical transponders," in B. Mukherjee, I. Tomkos, M. Tornatore, P. Winzer and Y. Zhao (eds.), Handbook of Optical Networks, pp. 177–258, Springer, Oct. 2020
- L. Schmalen, S. Brink and A. Leven, "Advances in detection and error correction for coherent optical communications: Regular, irregular, and spatially coupled LDPC code designs," in X. Zhou and C. Xie (eds.), Enabling Technologies for High Spectral Efficiency Coherent Optical Communication Networks, John Wiley & Sons, Inc., 2016, https://arxiv.org/abs/1704.04618
- A. Leven and L. Schmalen, "Implementation aspects of coherent transmit and receive functions in application-specific integrated circuits," in I. Kaminow, T. Li and A. Willner (eds.), Optical Fiber Telecommunications VI-A, Academic Press, Jun. 2013
- M. Adrat, T. Clevorn and L. Schmalen, "Iterative source-channel decoding & turbo decodulation," in R. Martin, U. Heute and C. Antweiler (eds.), Advances in Digital Speech Transmission, pp. 365–398, John Wiley & Sons, Ltd Chichester, UK, 2008
Konferenzbeiträge
- K. Gümüs and L. Schmalen, "Low rate protograph-based LDPC codes for continuous variable quantum key distribution," Proc. International Symposium on Wireless Communication Systems (ISWCS), Berlin, Germany, Sep. 2021, https://arxiv.org/abs/2107.06242
- V. Lauinger, F. Buchali and L. Schmalen, "Blind equalization for coherent optical communications based on variational inference," Advanced Photonic Congress: Signal Processing in Photonic Communications (SPPCom), pp. SpTh1D.6, Jul. 2021
- A. Buchberger, C. Häger, H. D. Pfister, L. Schmalen and A. Graell i Amat, "Learned decimation for neural belief propagation decoders," Proc. Int. Conf. Acoustics, Speech, and Signal Process. (ICASSP), Toronto, Canada, Jun. 2021, https://arxiv.org/abs/2011.02161
- B. Karanov, L. Schmalen and A. Alvarado, "Distance-Agnostic Auto-Encoders for Short Reach Fiber Communications," Proc. Opt. Fiber Commun. Conf. (OFC), pp. Tu5D.1, San Francisco, CA, USA, Jun. 2021
- T. Eriksson, R. Luis, G. Rademacher, B. Puttnam, K. Gümüs, L. Schmalen, A. Alvarado, H. Furukawa, N. Wada, T. Hirano, M. Sasaki and M. Takeoka, "Challenges in coding, DSP and parallel operation of quantum key distribution and coherent data transmission," Proc. Eur. Conf. Opt. Commun. (ECOC), Brussels, Belgium, Dec. 2020
- 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," Proc. Eur. Conf. Opt. Commun. (ECOC), Brussels, Belgium, Dec. 2020
- B. Karanov, P. Bayvel and L. Schmalen, "End-to-end learning in optical fiber communications: concept and transceiver design," Proc. Eur. Conf. Opt. Commun. (ECOC), Brussels, Belgium, Dec. 2020
- 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," Proc. IEEE Workshop Signal Process. Syst. (SiPS), Coimbra, Portugal, Oct. 2020, https://arxiv.org/abs/2005.08790
- 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), Vancouver, Canada, Sep. 2020, https://arxiv.org/abs/2005.08785
- 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. 1–3, San Diego, CA, USA, Mar. 2020, https://arxiv.org/abs/1912.05146
- A. Buchberger, C. Häger, H. Pfister, L. Schmalen and A. Graell i Amat, "Pruning Neural Belief Propagation Decoders," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 338–342, Los Angeles, CA, USA, 2020, https://arxiv.org/abs/2001.07464
- 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," Proc. Allerton Annu. Conf. Commun. Control Comp., pp. 192–199, Monticello, IL, USA, Nov. 2019, https://arxiv.org/abs/1910.01028
- S. Le, K. Schuh, F. Buchali, X. 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–4, Dublin, Ireland, Sep. 2019
- L. Schmalen and V. Aref, "Spatially Coupled LDPC Codes with Non-uniform Coupling for Improved Decoding Speed," Proc. IEEE Inform. Theory Workshop (ITW), pp. 1–5, Visby, Sweden, Aug. 2019, https://arxiv.org/abs/1904.07026
- S. 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. Tu2B–1, Mar. 2019
- K. Klaiber, S. Cammerer, L. Schmalen and S. ten Brink, "Avoiding burst-like error patterns in windowed decoding of spatially coupled LDPC codes," Proc. Int. Symp. Turbo Codes and Iterative Inform. Process. (ISTC), pp. 1–5, Hong Kong, SAR China, Dec. 2018, https://arxiv.org/abs/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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Rome, Italy, Sep. 2018
- L. Schmalen, "Performance Metrics for Communication Systems with Forward Error Correction," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Rome, Italy, Sep. 2018
- M. Dia, V. Aref and L. Schmalen, "A compressed sensing approach for distribution matching," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 1266–1270, Vail, CO, USA, Jun. 2018, https://arxiv.org/abs/1804.00602
- 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. W2A–54, San Diego, CA, USA, Mar. 2018
- L. Schmalen, "Probabilistic constellation shaping: challenges and opportunities for forward error correction," Proc. Opt. Fiber Commun. Conf. (OFC), pp. 1–3, San Diego, CA, USA, Mar. 2018
- T. Eriksson, M. Chagnon, F. Buchali, K. Schuh, S. ten Brink and L. Schmalen, "56 Gbaud probabilistically shaped PAM8 for data center interconnects," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Gothenburg, Sweden, Sep. 2017
- O. Sab, I. de Jauregui Ruiz, A. Ghazisaeidi, P. Plantady, A. Calsat, S. Dubost, L. Schmalen, J. Renaudier and V. Letellier, "Near capacity 24.6 Tb/s transmission over 10,285 km straight line testbed at 5.9 b/s/Hz spectral efficiency using TPCS-64QAM and C-Band EDFA-Only," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Gothenburg, 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Gothenburg, 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Gothenburg, Sweden, Sep. 2017
- J. Cho, L. Schmalen and P. Winzer, "Normalized generalized mutual information as a forward error correction threshold for probabilistically shaped QAM," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Gothenburg, Sweden, Sep. 2017
- L. Schmalen, T. Eriksson, F. Buchali, R. Dischler and U. Gebhard, "Distributed transmission and spatially coupled forward error correction in regenerative multipoint-to-point networks," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Gothenburg, Sweden, Sep. 2017
- F. Buchali, W. Idler, R. Dischler, T. Eriksson and L. Schmalen, "Spectrally efficient probabilistically shaped square 64QAM to 256 QAM," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Gothenburg, Sweden, Sep. 2017
- A. Alvarado, G. Liga, T. Fehenberger and L. Schmalen, "On the design of coded modulation for fiber optical communications," Advanced Photonic Congress: Signal Processing in Photonic Communications (SPPCom), pp. SpM4F–2, New Orleans, LA, USA, Jul. 2017
- Q. Hu, F. Buchali, L. Schmalen and H. Bülow, "Experimental demonstration of probabilistically shaped QAM," Advanced Photonic Congress: Signal Processing in Photonic Communications (SPPCom), pp. SpM2F–6, New Orleans, LA, USA, Jul. 2017
- L. Schmalen, V. Aref and F. Jardel, "Non-uniformly coupled LDPC codes: Better thresholds, smaller rate-loss, and less complexity," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 376–380, Aachen, Germany, Jun. 2017, https://arxiv.org/abs/1701.07629
- K. Schuh, F. Buchali, W. Idler, T. 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. Th5B–5, Los Angeles, CA, USA, Mar. 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. 1–3, Los Angeles, CA, USA, Mar. 2017
- L. Schmalen, L. Zhang and U. Gebhard, "Distributed rate-adaptive staircase codes for connectionless optical metro networks," Proc. Opt. Fiber Commun. Conf. (OFC), pp. W1J–2, Los Angeles, CA, USA, Mar. 2017
- G. Charlet, A. Ghazisaeidi, R. Muller, J. Renaudier and L. Schmalen, "Signal processing for spectrally efficient systems," Proc. Opt. Fiber Commun. Conf. (OFC), pp. Th4C–5, 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. 1–3, Los Angeles, CA, USA, Mar. 2017
- T. Eriksson, F. Buchali, W. Idler, L. Schmalen and G. Charlet, "Electronically subcarrier multiplexed PM-32QAM with optimized FEC overheads," Proc. Opt. Fiber Commun. Conf. (OFC), pp. W3J–4, 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. M3C–3, Los Angeles, CA, USA, Mar. 2017
- T. Eriksson, F. Buchali and L. Schmalen, "Nonlinear mitigation using probabilistically shaped real-valued modulation formats," Proc. Opt. Fiber Commun. Conf. (OFC), pp. Th2A–61, Los Angeles, CA, USA, Mar. 2017
- L. Zhang and L. Schmalen, "Feed-forward staircase codes," Proc. Int. ITG Conf. on Source and Channel Coding (SCC), pp. 1–6, Hamburg, Germany, Feb. 2017, https://arxiv.org/abs/1604.06574
- 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Düsseldorf, Germany, Sep. 2016
- L. Schmalen, D. Suikat, V. Aref and D. Roesener, "On the design of capacity-approaching unit-memory spatially coupled LDPC codes for optical communications," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Düsseldorf, Germany, Sep. 2016
- V. Aref, N. Rengaswamy and L. Schmalen, "Spatially coupled LDPC codes affected by a single random burst of erasures," Proc. Int. Symp. Turbo Codes and Iterative Inform. Process. (ISTC), pp. 166–170, Brest, France, Sep. 2016, https://arxiv.org/abs/1607.00918
- S. Cammerer, L. Schmalen, V. Aref and S. ten Brink, "Wave-like decoding of tail-biting spatially coupled LDPC codes through iterative demapping," Proc. Int. Symp. Turbo Codes and Iterative Inform. Process. (ISTC), pp. 121–125, Brest, France, Sep. 2016, https://arxiv.org/abs/1704.05408
- R. Dischler, F. Buchali and L. Schmalen, "Embedded in-band DQPSK signaling within n-QAM data transmission," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Düsseldorf, Germany, Sep. 2016
- F. Buchali, W. Idler, K. Schuh, L. Schmalen, T. Eriksson, G. Böcherer, P. Schulte and F. Steiner, "Study of electrical subband multiplexing at 54 GHz modulation bandwidth for 16QAM and probabilistically shaped 64QAM," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Düsseldorf, Germany, Sep. 2016
- A. Ghazisaeidi, I. de Jauregui Ruiz, R. Rios-Muller, L. Schmalen, P. Tran, P. Brindel, A. Meseguer, Q. Hu, F. Buchali, G. Charlet and J. Renaudier, "65Tb/s transoceanic transmission using probabilistically-shaped PDM-64QAM," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Düsseldorf, Germany, Sep. 2016
- W. Idler, F. Buchali, L. Schmalen, E. Lach, R. Braun, G. Boecherer, P. Schulte and F. Steiner, "Field demonstration of 1 Tbit/s super-channel network using probabilistically shaped constellations," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Düsseldorf, Germany, Sep. 2016
- L. Schmalen and F. Buchali, "Implicit constellation shaping in regenerative optical networks," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Düsseldorf, Germany, Sep. 2016
- N. Rengaswamy, L. Schmalen and V. Aref, "On the burst erasure correctability of spatially coupled LDPC ensembles," Proc. Int. Zurich Seminar Commun. (ZSC), pp. 155–159, Zurich, Switzerland, Mar. 2016
- S. Cammerer, V. Aref, L. Schmalen and S. ten Brink, "Triggering wave-like convergence of tail-biting spatially coupled LDPC codes," Conf. Inform. Sciences Syst. (CISS), pp. 93–98, Princeton, NJ, USA, Mar. 2016, https://arxiv.org/abs/1507.01970
- R. Rios-Müller, J. Renaudier, L. Schmalen and G. Charlet, "Practical approaches to 400G single-carrier submarine transmission," Proc. Opt. Fiber Commun. Conf. (OFC), pp. Th1B–4, Anaheim, CA, USA, Mar. 2016
- L. Schmalen, A. Alvarado and R. Rios-Müller, "Predicting the performance of nonbinary forward error correction in optical transmission experiments," Proc. Opt. Fiber Commun. Conf. (OFC), pp. 1–3, Anaheim, CA, USA, 2016
- L. Schmalen, V. Aref, D. Suikat and D. Rösener, "Next-generation forward error correction: Can we close the gap to the Shannon limit?," Asia Communications and Photonics Conference (ACP), pp. AS3D–4, Hong Kong, SAR China, Nov. 2015
- L. Schmalen, "Novel forward error correction concepts for coherent optical communications," IEEE Photonics Conference (IPC), pp. 279–280, Reston, VA, USA, Oct. 2015
- A. Ghazisaeidi, L. Schmalen, P. Tran, C. Simonneau, 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Valencia, Spain, Sep. 2015
- F. Buchali, L. Schmalen, Q. Hu and D. Che, "Low latency digital regenerator for dual polarization QAM signals," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Valencia, Spain, Sep. 2015
- R. Rios-Müller, J. Renaudier, P. Brindel, P. Jenneve, H. Mardoyan, L. Schmalen and G. Charlet, "Experimental comparison between super-channel and sub-band single-carrier for 400 Gb/s and 800 Gb/s transport," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Valencia, Spain, Sep. 2015
- 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Valencia, Spain, Sep. 2015, https://arxiv.org/abs/1509.08836
- J. Cho and L. Schmalen, "Construction of protographs for large-girth structured LDPC convolutional codes," Proc. IEEE Int. Conf. Commun. (ICC), pp. 4412–4417, London, UK, Jun. 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?," Proc. IEEE Workshop Signal Process. Advances in Wireless Commun.(SPAWC), pp. 460–464, Stockholm, Sweden, Jun. 2015, https://arxiv.org/abs/1505.05405
- L. Schmalen, S. ten Brink and A. Leven, "Spatially-coupled LDPC protograph codes for universal phase slip-tolerant differential decoding," Proc. Opt. Fiber Commun. Conf. (OFC), pp. Th3E–6, 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. W3K–4, Los Angeles, CA, USA, Mar. 2015
- R. Rios-Müller, J. Renaudier, P. Brindel, H. Mardoyan, P. Jenneve, L. Schmalen and G. Charlet, "1-Terabit/s net data-rate transceiver based on single-carrier Nyquist-shaped 124 GBaud PDM-32QAM," Proc. Opt. Fiber Commun. Conf. (OFC), pp. Th5B–1, Los Angeles, CA, USA, 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. 1–3, Los Angeles, CA, USA, Mar. 2015
- H. Mardoyan, R. Rios-Müller, M. Mestre, P. Jenneve, L. Schmalen, A. Ghazisaeidi, P. Tran, S. Bigo and J. Renaudier, "Transmission of single-carrier Nyquist-shaped 1-Tb/s line-rate signal over 3,000 km," Proc. Opt. Fiber Commun. Conf. (OFC), pp. W3G–2, Los Angeles, CA, USA, Mar. 2015
- J. Renaudier, R. Rios-Müller, L. Schmalen and G. Charlet, "Spectrally efficient 1Tb/s transceivers," Proc. Opt. Fiber Commun. Conf. (OFC), pp. M2G–3, Los Angeles, CA, USA, Mar. 2015
- F. Buchali, W. Idler, L. Schmalen and K. Schuh, "Performance and advantages of 100 Gb/s QPSK/8QAM hybrid modulation formats," Proc. Opt. Fiber Commun. Conf. (OFC), pp. Th2A–16, Los Angeles, CA, USA, Mar. 2015
- L. Schmalen, D. Suikat, D. Rösener and A. Leven, "Evaluation of left-terminated spatially coupled LDPC codes for optical communications," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, Cannes, France, Sep. 2014
- L. Schmalen, "Low-complexity phase slip tolerant LDPC-based FEC scheme," Proc. Eur. Conf. Opt. Commun. (ECOC), Cannes, France, Sep. 2014
- L. Schmalen, V. Aref, J. Cho and K. Mahdaviani, "Next generation error correcting codes for lightwave systems," Proc. Eur. Conf. Opt. Commun. (ECOC), Cannes, France, Sep. 2014
- J. Renaudier, R. 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," Proc. Eur. Conf. Opt. Commun. (ECOC), Cannes, France, Sep. 2014
- C. 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," Proc. Eur. Conf. Opt. Commun. (ECOC), Cannes, France, 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," Proc. Eur. Conf. Opt. Commun. (ECOC), Cannes, France, 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," Proc. Eur. Conf. Opt. Commun. (ECOC), Cannes, France, Sep. 2014
- A. Ghazisaeidi, L. Schmalen, I. de Jauregui, P. Tran, C. Simonneau, P. Brindel and G. Charlet, "52.9 Tb/s transmission over transoceanic distances using adaptive multi-rate FEC," Proc. Eur. Conf. Opt. Commun. (ECOC), Cannes, France, Sep. 2014
- L. Schmalen and K. Mahdaviani, "Laterally connected spatially coupled code chains for transmission over unstable parallel channels," Proc. Int. Symp. Turbo Codes and Iterative Inform. Process. (ISTC), pp. 77–81, Bremen, Germany, Aug. 2014
- 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. M2A–1, Mar. 2014
- L. Schmalen, "Energy efficient FEC for optical transmission systems," Proc. Opt. Fiber Commun. Conf. (OFC), pp. M3A–1, San Francisco, CA, USA, Mar. 2014
- H. Bülow, X. Lu, L. Schmalen, A. Klekamp and F. Buchali, "Experimental performance of 4D optimized constellation alternatives for PM-8QAM and PM-16QAM," Proc. Opt. Fiber Commun. Conf. (OFC), pp. M2A–6, San Francisco, CA, USA, Mar. 2014
- F. Buchali, L. Schmalen, A. Klekamp, K. Schuh and A. Leven, "5x50 Gb/s WDM Transmission of 32 Gbaud DP-3-PSK over 36, 000 km Fiber with Spatially Coupled LDPC Coding," Proc. Opt. Fiber Commun. Conf. (OFC), pp. W1A–1, San Francisco, CA, USA, Mar. 2014
- H. Bülow, X. Lu and L. Schmalen, "Experimental analysis of transmission and soft decoding of optimized 4D constellations," Asia Communications and Photonics Conference (ACP), pp. AF4C–1, Beijing, China, Nov. 2013
- M. Beermann, E. Monzo, L. Schmalen and P. Vary, "High speed decoding of non-binary irregular LDPC codes using GPUs," Proc. IEEE Workshop Signal Process. Syst. (SiPS), pp. 36–41, Taipei, Taiwan, Oct. 2013
- V. Aref, L. Schmalen and S. ten Brink, "On the convergence speed of spatially coupled LDPC ensembles," Proc. Allerton Annu. Conf. Commun. Control Comp., pp. 342–349, Monticello, IL, USA, Oct. 2013, Full proofs available at https://arxiv.org/abs/1307.3780
- 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, London, UK, Sep. 2013
- H. Bülow, X. Lu and L. Schmalen, "Experimental analysis of single carrier POLQAM (6Pol-QPSK) transmission with soft-decoding," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, London, UK, Sep. 2013
- H. Bülow, X. Lu and L. Schmalen, "Experimental Analysis of Single Carrier POLQAM (6Pol-QPSK) Transmission with Soft-Decoding," Proc. Eur. Conf. Opt. Commun. (ECOC), London, UK, Sep. 2013
- M. Salsi, R. Rios-Müller, 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, London, UK, Sep. 2013
- 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. 1–3, London, UK, Sep. 2013
- M. Salsi, A. Ghazisaeidi, P. Tran, R. Muller, L. Schmalen, J. Renaudier, H. Mardoyan, P. Brindel, G. Charlet and S. Bigo, "31 Tb/s transmission over 7,200 km using 46 Gbaud PDM-8QAM with optimized error correcting code rate," Proc. Opto-Electron. Commun. Conf. (OECC), pp. PD3-5, Kyoto, Japan, Jun. 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. OTh4E–3, Anaheim, CA, USA, Mar. 2013
- L. Schmalen and S. ten Brink, "Combining spatially coupled LDPC codes with modulation and detection," Proc. Int. ITG Conf. on Systems, Communications and Channel Coding (SCC), pp. 1–6, Munich, Germany, Jan. 2013
- L. Schmalen, S. ten Brink and A. Leven, "Analysis and optimization of iteration schedules for LDPC coded modulation and detection," Proc. Int. Symp. Turbo Codes and Iterative Inform. Process. (ISTC), pp. 210–214, Gothenburg, Sweden, Aug. 2012
- L. Schmalen, M. Adrat, T. Clevorn and P. Vary, "Windowed iterative source-channel decoding with delay constraints," Proc. Int. Symp. Turbo Codes and Iterative Inform. Process. (ISTC), pp. 16–20, Gothenburg, Sweden, Aug. 2012
- S. ten Brink, A. Leven and L. Schmalen, "FEC and soft decision: Concept and directions," Proc. Opt. Fiber Commun. Conf. (OFC), pp. OW1H–5, Los Angeles, CA, USA, Mar. 2012
- L. Schmalen, S. ten Brink, G. Lechner and A. Leven, "On threshold prediction of low-density parity-check codes with structure," Conf. Inform. Sciences Syst. (CISS), pp. 1–5, Princeton, NJ, USA, Mar. 2012
- F. Buchali, K. Schuh, D. Rösener, E. Lach, R. Dischler, W. Idler, L. Schmalen, A. Leven, R. Braun, A. Ehrhardt, C. Gerlach and 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," Proc. Opt. Fiber Commun. Conf. (OFC), pp. OW4C–4, Los Angeles, CA, USA, Mar. 2012
- L. Schmalen and R. Dischler, "Experimental evaluation of coded modulation for a coherent PDM system with high spectral efficiency," Proc. Opt. Fiber Commun. Conf. (OFC), pp. 1–3, 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," Proc. Eur. Conf. Opt. Commun. (ECOC), pp. Tu–6, Geneva, Switzerland, Sep. 2011
- L. Schmalen, M. Tschauner, T. Breddermann and P. Vary, "Novel iterative multiple description coding for correlated sources," Proc. Eur. Signal Process. Conf. (EUSIPCO), pp. 2094–2098, Barcelona, Spain, Aug. 2011
- M. Beermann, L. Schmalen and P. Vary, "Improved decoding of binary and non-binary LDPC codes by probabilistic shuffled belief propagation," Proc. IEEE Int. Conf. Commun. (ICC), pp. 1–5, Kyoto, Japan, Jun. 2011
- L. Schmalen and P. Vary, "Reconstruction of Multiple Descriptions by MMSE Estimation," Proc. ITG Conf. 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," Proc. IEEE Vehicular Technology Conf. (VTC-Fall), pp. 1–5, 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," Proc. IEEE Int. Conf. Commun. (ICC), pp. 1–5, 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," Proc. IEEE Int. Conf. Commun. (ICC), pp. 1–5, Cape Town, South Africa, May. 2010
- L. Schmalen and P. Vary, "Error resilient turbo compression of source codec parameters using inner irregular codes," Proc. Int. ITG Conf. on Source and Channel Coding (SCC), pp. 1–6, Siegen, Germany, Jan. 2010
- L. Schmalen, T. Schlien and P. Vary, "The flexcode source-channel coding approach for audio and speech transmission," Proc. Int. ITG Conf. on Source and Channel Coding (SCC), pp. 1–6, Siegen, Germany, Jan. 2010
- L. Schmalen and P. Vary, "Near-lossless compression and protection by turbo source-channel (de-) coding using irregular index assignments," Proc. Int. Conf. Acoustics, Speech, and Signal Process. (ICASSP), pp. 2485–2488, Taipei, Taiwan, Apr. 2009
- H. Lüders, B. Eschbach, L. Schmalen and P. Vary, "OFDM Turbo DeCodulation with exit optimized bit loading and signal constellations," Proc. Int. Conf. Acoustics, Speech, and Signal Process. (ICASSP), pp. 2589–2592, Taipei, Taiwan, Apr. 2009
- T. Clevorn, L. Schmalen, P. Vary and M. Adrat, "Iterative Source-Channel Decoding: Design of Redundant Index Assignments," Proc. ITG Conf. Speech Communication, pp. 1–4, Aachen, Germany, Oct. 2008
- L. Schmalen, P. Vary and M. Adrat, "Reduced-Search Source Decoders for Iterative Source-Channel Decoding," Proc. ITG Conf. Speech Communication, pp. 1–4, Aachen, Germany, Oct. 2008
- L. Schmalen, B. Schotsch, M. Jeub, P. Vary and T. Clevorn, "The FlexCode Channel Coding Approach," Proc. ITG Conf. Speech Communication, pp. 1–4, Aachen, Germany, Oct. 2008
- L. Schmalen, P. Vary, M. Adrat and T. Clevorn, "Complexity-reduced iterative source-channel decoding by conditional quantization," Proc. Int. Symp. Turbo Codes and Iterative Inform. Process. (ISTC), pp. 327–332, Lausanne, Switzerland, Sep. 2008
- R. Thobaben, L. Schmalen and P. Vary, "Joint source-channel coding with inner irregular codes," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 1153–1157, Toronto, Canada, Jul. 2008
- B. Schotsch, L. Schmalen, P. Vary and T. Clevorn, "Graph-Based Turbo DeCodulation with LDPC Codes," Proc. IEEE Vehicular Technology Conf. (VTC-Spring), pp. 772–776, Singapore, May. 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," Proc. Int. ITG Conf. on Source and Channel Coding (SCC), pp. 1–6, Ulm, Germany, Jan. 2008
- L. Schmalen, P. Vary, T. Clevorn and B. Schotsch, "Efficient iterative source-channel decoding using irregular index assignments," Proc. Int. ITG Conf. on Source and Channel Coding (SCC), pp. 1–6, Ulm, Germany, Jan. 2008
- L. Schmalen, P. Vary, M. Adrat and T. Clevorn, "On the EXIT Characteristics of Feed Forward Convolutional Codes," Proc. IEEE Int. Symp. Inform. Theory (ISIT), pp. 2686–2690, Nice, France, Jun. 2007
- L. Schmalen, T. Clevorn and P. Vary, "Iterative source-coded equalization: turbo error concealment for ISI channels," Proc. IEEE Workshop Signal Process. Advances in Wireless Commun.(SPAWC), pp. 1–5, Helsinki, Finland, Jun. 2007
- T. Clevorn, L. Schmalen, P. Vary and M. Adrat, "On the optimum performance theoretically attainable for scalarly quantized correlated sources," Proc. Int. Symp. Inform. Theory Appl.(ISITA), Seoul, South 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," Conf. Inform. Sciences Syst. (CISS), pp. 245–245, 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 (POSTER 2005), Prague, Czech Republic, May. 2005