christophe Laot
- Département Mathematical and Electrical Engineering (IMT Atlantique - MEE)
- Equipe Communication System Design (Lab-STICC_COSYDE)
Présentation
Professeur en communications numériques à IMT Atlantique, département Mathematical and Electrical Engineering (ex Signal et Communications). https://www.imt-atlantique.fr/fr/personne/christophe-laot Responsable de l'activité en communications acoustiques sous-marines. Membre du laboratoire CNRS UMR LabSTICC, équipe Cosyde. Membre IEEE OES (Underwater Communication, Navigation, and Positioning) Communications sous-marines – lien vidéo : TB34 - YouTube Projet FUI COMET - lien vidéo : https://www.imt-atlantique.fr/sites/default/files/users/user1023/Video_COMET.avi 2009 Habilitation à diriger des recherches 1997 Thèse en communications et codage de l'information : «Egalisation autodidacte et turbo égalisation. Application aux canaux sélectifs en fréquences» These.pdf 1992 Mastère Communications, Optique, Formes et Images de l'ENST Bretagne 1991 Ingénieur de l'Ecole FRançaise d'Electronique et d'Informatique (EFREI 1991)
Publications
Publications
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A New Adaptive Stopping Criterion for Sparse Channel Estimation in MIMO-OFDM Underwater Acoustic CommunicationsOCEANS 2025 Brest, IEEE; MTS, Jun 2025, Brest, France. pp.1-7, ⟨10.1109/OCEANS58557.2025.11104647⟩ |
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Channel Model for Massive MIMO Shallow Underwater Acoustic CommunicationsOCEANS 2024 - SINGAPORE, Apr 2024, Singapour, Singapore. pp.1-6, ⟨10.1109/OCEANS51537.2024.10706263⟩ |
Massive MIMO Channel Model for Underwater Acoustic CommunicationsOCEANEXT 2024, Jun 2024, NANTES, France |
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Compressed Sensing for MIMO-OFDM Underwater Acoustic Channel Single-Block Estimation2024 Seventh Underwater Communications and Networking Conference (UComms), Sep 2024, Sestri Levante, Italy. ⟨10.1109/UComms64662.2024.10847984⟩ |
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Sécuriser les transmissions acoustiques sous-marines en s’inspirant de la physique de propagationSERENADE (Surveillance, Etude et Reconnaissance de l’Environnement mariN par Acoustique Discrète), Jun 2024, Toulon, France |
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Optimization of Underwater Acoustic Communication Parameters for a Swarm of AUVsSea Tech Week, Sep 2022, Brest, France |
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Adaptive optimization of OFDM Underwater Acoustic Communication parameters based on on-board channel simulationsUACE 2021: 6th Underwater Acoustics Conference & Exhibition, Jun 2021, (Virtuel), Greece. pp.030001, ⟨10.1121/2.0001498⟩ |
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Two-Dimensional Spreading waveform for Adaptive Rate Acoustic Underwater CommunicationIEEE Oceans 2021, Sep 2021, San Diego, United States. ⟨10.23919/OCEANS44145.2021.9705842⟩ |
AIS Relay for Autonomous Underwater Vehicle using an Adaptive Bit Rate Multi-Carrier Spread Spectrum ModemSea Tech Week, Oct 2020, Brest, France |
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Synchronisation trame dans un contexte multicapteurs pour communication acoustique sous-marineGRETSI 2019, Aug 2019, Lille, France |
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Frame Detection and Synchronization for a SIMO Receiver in presence of Doppler Shift for Underwater Acoustic CommunicationsIEEE Oceans 2019, Jun 2019, Marseille, France. ⟨10.1109/OCEANSE.2019.8867462⟩ |
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Robust OFDM Modem for a Swarm of Underwater Autonomous VehiclesIEEE Oceans 2019, Jun 2019, Marseille, France. ⟨10.1109/OCEANSE.2019.8867069⟩ |
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Carrier Phase Synchronization Techniques at Very Low SNR for Deep Space MissionsSPACEOPS 2018 : The 15th International Conference on Space Operations, May 2018, Marseille, France. ⟨10.2514/6.2018-2398⟩ |
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Q-Learning Based Adaptive Channel Selection for Underwater Sensor NetworksUnderwater Communications and Networking, Aug 2018, Lerici, Italy |
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Timing recovery scheme for multi-antenna receiver in presence of Doppler shiftICT 2018 : International Conference on Telecommunication, Jun 2018, Saint-Malo, France. ⟨10.1109/ICT.2018.8464943⟩ |
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Nonlinear Analysis of GMSK Carrier Phase Decovery LoopISIVC 2016 : International Symposium on Signal, Image, Video and Communications, Nov 2016, Tunis, Tunisia. pp.230 - 235, ⟨10.1109/ISIVC.2016.7893992⟩ |
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Adaptive Power Allocation for Noncooperative OFDM Systems in UWA Interference ChannelsUComms 2016 : Underwater Communications and Networking conference, Aug 2016, Lerici, Italie. pp.1 - 5, ⟨10.1109/UComms.2016.7583460⟩ |
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Performance analysis of GMSK Carrier synchronization loop phase detector at very low SNRTTC 2016: 7th ESA International Workshop on Tracking, Telemetry and Command Systems for Space Applications, Sep 2016, Noordwijk, Netherlands |
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Distributed Power Allocation Strategy in Shallow Water Acoustic Interference ChannelsSPAWC 2016 : IEEE 17th International Workshop on Signal Processing advances in Wireless Communications, Jul 2016, Edinburgh, United Kingdom. pp.1 - 5, ⟨10.1109/SPAWC.2016.7536793⟩ |
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Widely Linear SC-FDE Systems for Underwater Acoustic Communication: Experimental ResultsOCEANS 2016 - Monterey : MTS/IEEE international conference, Sep 2016, Monterey, United States. pp.1 - 4, ⟨10.1109/OCEANS.2016.7761177⟩ |
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Joint Equalization and Decoding Scheme Using Modified Spinal Codes for Underwater CommunicationsOCEANS 2016 - Monterey : MTS/IEEE international conference, Sep 2016, Monterey, United States. pp.1 - 6, ⟨10.1109/OCEANS.2016.7761418⟩ |
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Power-Efficient Spectrum Sharing for Noncooperative Underwater Acoustic Communication SystemsOCEANS 2016 - Monterey : MTS/IEEE international conference, Sep 2016, Monterey, United States. pp.1 - 6, ⟨10.1109/OCEANS.2016.7761437⟩ |
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Simulation de canaux acoustiques sous-marins par rejeu stochastique paramétriqueGRETSI 2015 : 25ème colloque du Groupement de Recherche en Traitement du Signal et des Images, Sep 2015, Lyon, France |
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Stochastic Replay of SIMO Underwater Acoustic Communication ChannelsOCEANS 2015 - Washington : MTS/IEEE international conference, Oct 2015, Washington, United States. pp.1 - 6 |
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Quadratic Chirp Modulation for Underwater Acoustic Digital CommunicationsOCEANS 2015 - Genova : MTS/IEEE international conference, May 2015, Gênes, Italy. pp.1 - 7, ⟨10.1109/OCEANS-Genova.2015.7271558⟩ |
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Multiple-input hybrid frequency-time domain DFE over time-varying rayleigh-fading channelDAT 2014 : 6ème séminaire sur les systèmes de Detection : Architectures et Technologies, Feb 2014, Alger, Algeria |
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A Parametric Replay-Based Framework for Underwater Acoustic Communication Channel SimulationUComms 2014 : Underwater Communications and networking, Sep 2014, Sestri Levante, Italy. ⟨10.1109/UComms.2014.7017148⟩ |
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TDMA based MAC Transmission Schedules in Multihop Grid Ad hoc Underwater Acoustic NetworksUComms 2014 : underwater communications conference, Sep 2014, Sestri Levante, Italy. ⟨10.1109/UComms.2014.7017131⟩ |
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Version adaptative d'un égaliseur DFE hybride en bloc utilisant la technique Overlap and SaveGRETSI 2013 : 24ème colloque du Groupement de Recherche en Traitement du Signal et des Images, Sep 2013, Brest, France |
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Single Carrier Frequency Division Multiple Access for Underwater Acoustic CommunicationsUA 2013 : 1st international conference on Underwater Acoustics, Jun 2013, Island Of Corfu, Greece |
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Réduction des interférences entre sous-porteuses dans les systèmes OFDM fenêtrés sur canal acoustique sous-marinGRETSI 2013 : 24ème colloque du Groupement de Recherche en Traitement du Signal et des Images, Sep 2013, Brest, France |
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A robust OFDM Modem for Underwater Acoustic CommunicationsOceans 2013 : MTS/IEEE conference, Jun 2013, Bergen, Norway. pp.1 - 5, ⟨10.1109/OCEANS-Bergen.2013.6608003⟩ |
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Effective Soft Decision Feedback Equalizer for Channels with Low SNR in Underwater Acoustic CommunicationsOceans 2013 : MTS/IEEE conference, Jun 2013, Bergen, Norway |
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Advantages of pulse-shaping applied to OFDM systems over underwater acoustic channelsOceans 2012: MTS/IEEE conference, Oct 2012, Hampton Road, Va, United States. pp.1 - 7, ⟨10.1109/OCEANS.2012.6404831⟩ |
An overview of project COMPOUND : Cooperative communications and positioning in mobile underwater networksFutur Nework & mobile summit, Jul 2012, Berlin, Germany |
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Multiple-input hybrid frequency-time domain adpative decision feedback equalization for underwater acoustic digital communications11th European Conference on Underwater Acoustics (ECUA 2012), Jul 2012, Edimbourg, United Kingdom |
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Achievable Rates of Underwater Acoustic OFDM Systems over Highly Dispersive ChannelsEuropean Conference on Underwater Acoustics, Jul 2012, Edinburgh, United Kingdom. pp.1-8 |
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A Self-reconfiguring Constant Modulus Algorithm for Proper Polarization Demultiplexing in Coherent Optical ReceiversOFC 2012: Optical Fiber Communication Conference, Mar 2012, Los Angeles, États-Unis |
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Acoustic modem performance assessment via stochastic replay of at sea recorded underwater acoustic communication channels4th UAM Conference : Underwater Acoustic Measurements, Jun 2011, Island Of Kos, Greece |
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Le canal de communication acoustique sous-marin : point de vue de la théorie de l'information23ème colloque GRETSI, Sep 2011, Bordeaux, France |
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Adaptive frequency-domain equalization for underwater acoustic communicationsOceans 2011, Jun 2011, Santander, Spain |
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Adaptive MMSE turbo equalization with high-order modulations and spatial diversity applied to underwater acoustic communicationsEuropean Wireless 2011, Apr 2011, Vienne, Austria |
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Adaptive blind estimation of sparse SIMO channelsWOSSPA 2011: 7th International Workshop on Systems, Signal Processing and their Applications, May 2011, Tipaza, Algeria |
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Adaptive single-carrier frequency-domain equalization for 100G coherent optical communicationsSPPCom: Signal Processing in Photonics Communications, Jun 2011, Toronto, Canada |
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On the capacity of the underwater acoustic communication channel under realistic assumptionsIEEE European Wireless, Apr 2011, Vienne, Austria |
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Adaptive MMSE Turbo equalization usign high order modulation : experimental results on underwater acoustic channelUAM 2011 : 4th Underwater acoustic conference, Jun 2011, Kos Island, Greece |
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Shallow water acoustic communications : how far are we from the channel capacity ?European Conference on Underwater Acoustics, Jul 2010, Istanbul, Turkey |
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Experimental results on adaptative MMSE turbo equalization in shallow underwater acoustic communicationOceans'10, May 2010, Sydney, Australia |
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Check and validate reed solomon block turbo codes in shallow underwater acoustic communicationOceans '10, May 2010, Sydney, Australia |
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Experimental results on MMSE turbo equalization in underwater acoustic communication using high order modulationOceans'10, Sep 2010, Seattle, United States |
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Underwater acoustic communication using reed solomon block turbo codes channel coding to transmit images and speechOceans'10, Sep 2010, Seattle, United States |
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Improvement of underwater acoustic communication using reed solomon bloc turbo codesISTC 2010 : 6th International symposium on turbo codes, Sep 2010, Brest, France |
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A maximum entropy framework for statistical modeling of underwater acoustic communication channelsIEEE Oceans 2010, May 2010, Sydney, Australia |
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Blind DFE based on NLMS algorithm with generalized normalized gradient descent regularizationOcean's 2009, Oct 2009, Biloxi, United States |
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Characterisation of time-varying underwater acoustic communication channel with application to channel capacityUnderwater Acoustic Measurements, Jun 2009, Nafplion, Greece |
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ROSE : development and demonstration of a "mobile Response Observatory" prototype for subsea environmental monitoringOceans'2009, May 2009, Bremen, Germany |
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MMSE turbo equalization using a low complexity series expansion to approximate the matrix inversion in frequency selective MIMO channels5th international symposium on Turbo Codes & related topics, 1-5 septembre, Lausanne, Suisse, Sep 2008, Lausanne, Switzerland |
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Extended linear phase detector characteristic of a software PLLISCCSP 2008 : 3rd International Symposium on Communications, Control and Signal Processing, march 12-14, St Julians, Malte, Mar 2008, St Julians, Malta. pp.62 - 67, ⟨10.1109/ISCCSP.2008.4537193⟩ |
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Blind doppler compensation scheme for single carrier digital underwater communicationsOceans 2008, 15-18 September, Quebec city, Canada, Sep 2008, Quebec, Canada |
Frequency-domain turbo equalization for OFDM and single-carrier transmission in ST-BICM systemsGLOBECOM'07, Nov 2007, Washington, United States. pp.3421-3426 |
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Efficient frequency-domain MMSE turbo equalization derivation and performance comparison with the time-domain counterpartICWMC'07 : proceedings of the third international conference on wireless and mobile communications, 4-7 mars, Guadeloupe, France, Mar 2007, Guadeloupe, France. pp.65 -, ⟨10.1109/ICWMC.2007.38⟩ |
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Non data aided timing recovery algorithms for digital underwater acoustic communicationsOCEANS'07, June 18-21, Aberdeen, Scotland, Jun 2008, Aberden, United Kingdom |
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Efficient frequency-domain MMSE turbo equalization derivation and performance comparison with the time-domain counterpartICWMR 2007 : International Conference on Wireless and Mobile Communications, March 4-9, Guadeloupe, French Caribbean, Mar 2007, Guadeloupe, Ecuador |
Improved AUV autonomy provided by an underwater acoustic linkInternational Society of Offshore and Polar Engineers, ISOPE 2006, San Francisco, USA - 28 mai-2 juin, May 2007, San Fransisco, États-Unis |
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Implementation of a blind adaptive decision feedback equalizerEUSIPCO 06 : 14th European Signal Processing Conference, September 4-8, Florence, Italy, Sep 2006, Florence, Italie |
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Performance validation for MMSE turbo equalization in ST-BICM systemsVTC 2006 Fall : 64th IEEE Vehicular Technology Conference, September 25-28, Montreal, Canada, May 2006, Montreal, Canada |
A closed-Form Solution for the Finite Length Constant Modulus ReceiverISIT 3005, Adelaide, Australia, September 4-9, Sep 2005, Adelaide, Australie |
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Infinite-Lengh implementation of linear chip-level equalizer by bling recursive filtering for the DS-CDMA downlinkICC 2004 Paris, Jun 2004, Paris, France |
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Comparaison des turbo-égaliseurs MAP et MMSE pour récepteur à antennes multiples2nd International Symposium on Image/Video Communications ISIVC'04, Jul 2004, Brest, France |
Real-time MMSE Turbo-equalization on the TMS302C5509 fixed-point DSPIEEE International Conference on Acoustics, Speech and Signal Processing ICASSP 2004, May 2004, Montreal, Canada. pp.V-325 - V-328, ⟨10.1109/ICASSP.2004.1327113⟩ |
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Amélioration des performances du RAKE par pré-filtrage adaptatif autodidacte pour la liaison descendante de l'UMTS-FDDGRETSI 2003 : 19ème colloque sur le traitement du signal et des images, Paris, 8-11 septembre, Sep 2003, Paris, France |
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Which interleaver for Turbo-equalization system on frequency and time selective channels for high order modulations?IEEE Workshop on Signal Processing Advances in Wireless Communications, 2003 SPAWC, Jun 2003, Rome, Italy. pp.673-677 |
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Iterative channel equalization for the multicodeVTC 2003 Spring : the 57th IEEE Semiannual Vehicular Technology Conference, Apr 2003, Jeju, Corée du Sud. pp.1857 - 1861 |
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Egalisation itérative pour les transmissions multicodes de la liaison descendante de l'UMTS-FDDGRETSI 2003 : 19ème colloque sur le traitement du signal et des images, Paris, 8-11 septembre, Sep 2003, Paris, France |
Improved bit error probability estimation for DS-CDMA downlink equalizer-based receivers with small spreading factorsICT 2003 : 10th international conference on telecommunications, February 23-March 1, Tahiti, French Polynesia, Feb 2003, Tahiti, Polynésie française. pp.877 - 881, ⟨10.1109/ICTEL.2003.1191523⟩ |
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Fixed-Point Implementation of an Efficient Low-Complexity Turbo-Equalization Scheme3rd International Symposium on Turbo-Codes and Related Topics, Sep 2003, Brest, France. pp.415-418 |
Egaliseur autodidacte à retour de décisions à configuration variable : comparaisons entre algorithme "itératif" et "bloc".GRETSI 2003 : 19e colloque GRETSI sur le traitement du signal et des images, 8-11 septembre, Paris, France, Sep 2003, Paris, France |
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A chip-interleaving pattern retaining orthogonality in DS-CDMA systems : application to the multicode downlinkIEEE VTC 2003 (IEEE Vehicular Technology Conference) - Fall, Orlando (USA), 4-9 oct. 2003, Oct 2003, Fall, États-Unis. pp.1857 - 1861, ⟨10.1109/VETECF.2003.1285960⟩ |
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Multiple-Input turbo equalization over time-varying frequency selective channelEUSIPCO 2002 : 11th European Signal Conference, Sep 2002, Toulouse, France |
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Analyse de la convergence en turbo-détection18e Colloque GRETSI sur le Traitement du Signal et des Images, Toulouse, France, 10-13 Septembre 2001, Sep 2001, Toulouse, France |
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Analyse de la convergence en turbo-détectionGRETSI 2001: 18eme colloque sur le traitement du signal et des images, Sep 2001, Toulouse, France |
Reduced-Complexity Soft Demapping for Turbo-EqualizationInternational Symposium on Turbo Codes ISTC'2000, Sep 2000, Brest, France. pp.515-518 |
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Turbo-égalisation des modulations MAQ-M sur canaux non stationnaires sélectifs en fréquencesGRETSI'99 Symposium, Sep 1999, Vannes, France |
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Blind spatio-temporal Decision Feedback Equalization : a Self Adaptative Structure Approach99 Globecom, Dec 1999, Rio De Janeiro, Brésil. pp.2301 - 2305 |
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Egalisation Autodidacte Adaptative : Application aux Systèmes d'Accès à Répartition dans le tempsGRETSI'99 Symposium, Sep 1999, Vannes, France. pp.1081 - 1084 |
Improved Blind Decision Equalizer with self-adapted structure for High Order QAM signalsProc. ICT, Jun 1999, Chalkidiki, Grèce |
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Une structure universelle pour l'égalisation numérique audidacte adaptativeGRETSI 97, Sep 1997, Grenoble, France |
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Turbo-équalization over a frequency selective channel1er Symposium sur les turbo-codes, Sep 1997, Brest, France |
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Is training of adaptive equalizers still useful ?Globecom'96, Nov 1996, Londres, United Kingdom. pp.968 - 972 |
Détection à décision pondérée sur canal sélectif en fréquence en présence de codage de canalGRETSI'95 : 15e colloque, Sep 1995, Juan-Les-Pins, France. pp.517 - 520 |
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Real time implementation of a low bit rate coder for an acoustic underwater phone on a fixed point DSP 56001ICSPAT '92 : third international conference on signal processing applications and technology, Nov 1992, Boston, United States. pp.921 - 927 |
Codes and Turbo CodesSpringer-Verlag, pp.400, 2010, IRIS international series, 9782817800387 |
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Codes et turbocodes (sous la direction de Claude Berrou)Springer, pp.397, 2007, Iris, Iris, 978-2-287-32739-1 |
Turbodétection et turbo égalisationSignal et Télécom. Sous la dir. de Philippe Loubaton, Hermès, pp.55 - 97, 2004, Traité IC2 : Traitement du signal et de l'image, 2-7462-0823-7 |
Annuleur d'interférences entre symbolesFrance, N° de brevet: 01-13991. 2001 |
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Watermark: bch1 Dataset Description2016 |
Annuleur d'interférences entre symboles[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB); Dépt. Electronique (Institut Mines-Télécom-Télécom Bretagne-UEB). 2002 |
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Récepteur linéaire pour la liaison descendante de l'UMTS-FDD[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB). 2002 |
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Nouvelles structures d'égalisation linéaire à entrée et sortie pondérée. Application à la turbo égalisation pour les transmissions en mode paquet[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB). 2002 |
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Turbo égalisation apliquée aux réseaux à large bande[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB). 2002 |
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Egaliseur à Retour de Décision Autodidacte (ERDA). Adaptation aux transmissions par paquet court[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB). 2002 |
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La turbo détection : principes et performances[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB). 2001 |
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Egaliseur à retour de décision autodidacte adaptatif pour les transmissions en mode paquet[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB); Dépt. Electronique (Institut Mines-Télécom-Télécom Bretagne-UEB). 1999 |
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Portage de logiciels de turbo égalisation dans l'environnement COSSAP[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB). 1999 |
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Les turbo-communications[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB). 1997 |
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Rapport de recherche : structure et performances des récepteurs optimaux en présence de canaux sélectifs en fréquence[Rapport de recherche] Dépt. Signal et Communications (Institut Mines-Télécom-Télécom Bretagne-UEB). 1994, pp.44 |
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Récepteurs pour communications numériques sur canaux sélectifs en fréquencesSciences de l'ingénieur [physics]. UBO Brest, 2009 |