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Nikolai Nefedov

Principal Scientist
Pervasive Communications Lab, Switzerland

Background

 

I received M.Sc. degree with Honour in Radio-Physics (1982) from St. Petersburg State Technical University and Ph.D. degree in Communications Theory (1989) from St. Petersburg State University of Telecommunications (Russia).

 

After graduation I was working at different research positions in Russian Academy of Science in Institute of Nuclear Physics (Leningrad) and Institute of Atmospheric Physics (Moscow).

During 1992-1997 I was working on DSP and ASIC design in Finland (ATMEL Corp.) and hold different positions at Helsinki University of Technology (details here).

 

Since 1997  I am a member of research staff at Nokia Research Center (first in Finland, since 2005 in Switzerland).

Research Interests

General fields of information processing, communications and control (from physics up to cognitive behavior).

Research Projects

During previous years I have been working in different fields such as

  • Communication theory
  • Different fields in physics
  • ASIC design (including HW/SW for DSP cores)
  • Wideband channel modeling and characterization
  • Coding and information theory
  • Signal processing for wireless communications
  • Hybrid analog-digital signal processing
  • Information processing at nano-scale systems
  • Cognitive networks
  • Algorithms/services in mobile social networks
  • Network analysis and clustering in dynamical networks

 

 

 

  • Current activities are concentrated on modeling and information dissemination algorithms/services in mobile social networks.

     

    More details at Pervasive Communications Lab, NRC Switzerland.

     

     

    • Publications

    Recent publications

    X. Dong, P. Frossard, P. Vandergheynst, N. Nefedov, 'Clustering with Multi-Layer Graphs: A Spectral Perspective', submitted to IEEE Trans. Signal Processing, June 2011.

    D. Biswas, N. Nefedov, V. Niemi, 'Distributed Usage Control', in Proc. of 8th International Conference on Mobile Web Information Systems (MobiWIS), Sep 19-21, 2011.

    N. Nefedov, 'Applications of System Dynamics for Communities Detection in Complex Networks', in IEEE Proc.3d Int. Conf. Non-Linear Dynamics and Synchronization (INDS'11), Klagenfurt, Austria, July 25-27, 2011.

    N. Nefedov, X. Dong, P. Frossard, P. Vandergheynst, 'Methods for Clustering of Multi-Layer Graphs in Mobile Networks', Workshop on Information and Decisions in Social Networks, (WIDS/LIDS) MIT, Boston, May/31-June/1, 2011.

    N. Nefedov, 'Multiple-Membership Communities Detection in Mobile Networks', in ACM Proc Int. Conf. on Web Intelligence, Mining and Semantics (WIMS 2011), Songdal, Norway, May 24-27, 2011.

    X. Dong, P. Frossard, P. Vandergheynst, N. Nefedov, 'Regularization Framework for Mobile Social Network Analysis', in Proc. IEEE ICASSP 2011, Prague, May 24-29.

    N. Nefedov, 'Quantum-Like Computations using Coupled Nano-scale Oscillators;, 4nd Int Conf. on Nano-Networks 2009, Lucerne, Switzerland, 18-20 Oct.2009, Lecture Notes for Computer Science, LNCST 20, pp.64-69, Springer-Verlag, 2009.

    N. Nefedov, 'Distributed Estimation and Synchronization in Wireless Networks: Coupled Dynamical Systems Approach', in IEEE Proc 2nd Int Workshop on Nonlinear Dynamics and Synchronization (INDS 2009), pp.100-105, July 20-21, Klagenfurt, Austria, 2009.

    N. Nefedov, “Application of Coupled Nano-Scale Resonators for Spectral Sensing”, in Journal of Physics: Condensed Matter, v.21, No.14 (8 April) 144213 (10pp), 2009.

    N. Nefedov, “Decentralized Synchronization and Estimation in Wireless Networks”, in Lecture Notes in Computer Science, vol.5174, pp.1-12, Springer-Verlag, Berlin, 2008.

    N. Nefedov, “On Application of Coupled NEMS for Spectral Sensing”, in Proc. 2nd Int. Conf. on Nanoscience and Nanotechnology, 2008, Melbourne, Australia, Feb. 2008.

    N. Nefedov, “Spectral Sensing with Coupled Nanoscale Oscillators“, in Proc. 2nd Int. Conf. on Nano-Networks, Catania, Italy, Sept. 2007.

    V.Ermolov, M.Heino, A.Kärkkäinen, R. Lehtiniemi, N.Nefedov, P.Pasanen, M.Rouvala, T.Ryhänen, Z.Radivojevic, E. Seppälä, M.Uusitalo, “Significance of Nanotechnology for Future Wireless Devices and Communications” in Proc IEEE PIMRC’2007, Helsinki, Finland, Sept.2007 (invited paper)

    H.-A.Loeliger, J.Biveroni, N.Nefedov, "A Calibration Method for Flash-Type Analog-to-Digital Converters" submitted to EURASIP Journal on Advances in SP, 2007.

    N. Nefedov, “Towards Distributed Communications Systems: Relay-Based Wireless Networks,” Lecture Notes in Computer Science, vol. 4003, Springer-Verlag, Berlin, 2006.

    Keynote speech at 6th Int. Conf. on Next Generation Wired/Wireless Advanced Networking (NEW2AN 2006), St.Petersburg, May 2006.

     

    N. Nefedov, “Hybrid ARQ based on Rate Compatible Zigzag Codes,” in IEEE 4th Int. Symp. on Turbo Codes 2006, Munich, April 2006.

    S. Iraji, N. Nefedov, H. Berg, T. Lunttila, P. Ranta, “Performance of Zigzag Codes in a Multi-Band OFDM Ultrawideband System,” in Int. Conf. on Software, Telecomm. and Computer Networks (SoftCOM) Groatia, Sept. 2005.

    N. Nefedov, “On Channel Estimation Methods for Space-Time Block Transmission in Flat-Fading Channels,” Lecture Notes in Computer Science, vol. 3124, pp.504-509, Springer-Verlag, Berlin 2004.

    N. Nefedov, “On Channel Estimation in SIMO and MIMO Channels,” Lecture Notes in Computer Science, vol. 3124, pp.532-540, Springer-Verlag, Berlin 2004.

    N.Y.Ermolova, N.Nefedov, S.-G. Haggman, “An Iterative Method for Non-Linear Channel Equalization in OFDM Systems”, in Proc IEEE PIMRC’2004, Barcelona, Sept, 2004.

    N. Nefedov, “Channel Estimation for Space-Time Block Codes in Flat-Fading Channels,” in Proc IEEE PIMRC’2004, Barcelona, Sept, 2004.

    E. Ramirez, N. Nefedov, “Soft Output Detection using Path Detector for Multiple Antennas”, in Proc. IEEE NORSIG, pp.173-176, June 2004, Espoo, Finland.

    E. Ramirez, N. Nefedov, “Performance Evaluation of Path Detector with ‘a-priori’ Information in MIMO Channels”, in Proc. Nordic Radio Symposium, August 2004 (accepted).

    N. Nefedov, “Evaluation of Low Complexity Concatenated Codes for High Data Rate Transmission”, in Proc IEEE PIMRC’2003, pp.1868-1872, Beijing, Sept 7-10, 2003.

    N. Nefedov, “Multi-Dimensional ZigZag Codes for High Data Rate Transmission”, in Proc. IEEE 3d Int. Symp. on Turbo Codes (ISTC 2003), pp.423-426, Sept.1-5, Brest, France, 2003.

    N. Nefedov, M. Pukkila, R. Visoz, A. Berthet, “Iterative Receiver Concept for TDMA Packet Data Systems”, European Transactions on Telecommunications, pp.457-469, v.14, Sept-Oct. 2003.

    N. Nefedov, M. Pukkila, R. Visoz, A. Berthet, “Iterative Data Detection and Channel Estimation for Advanced TDMA Systems”, IEEE Transactions on Communications, pp.141-144, vol.51, No.2, Feb. 2003.

    N. Nefedov, G-P.Mattellini, “Evaluation of Potential Transmit Diversity Schemes with Iterative Receivers in EDGE”, in Proc. IEEE PIMRC’2002, pp.2087-2091, Lisbon, Sept. 2002.

    A. Hottinen, J.Vesma, O.Tirkkonen, N. Nefedov, “High Bit Rates for 3G and Beyond using MIMO channels”, in Proc. IEEE PIMRC’2002, pp. 854-858, Lisbon, Sept. 2002.

    N. Nefedov, M. Pukkila, “Low Complexity Iterative Receiver for EDGE”, IEEE Int. Conf. on Telecomm.(ICT 2002), v.2, pp.102-106, Beijing, June 24-26, 2002 (best paper award).

    N. Nefedov, J.Salo, “Performance of Low Complexity Concatenated Codes Formed by Differential Encoders”, in Proc. IEEE Int. Conf. on Telecomm. (ICT 2002), v.1, pp.151-155, Beijing, June 24-26, 2002.

    A. Abouda, N. Nefedov, “Performance of Turbo Codes with Quantized Extrinsic Information”, in Proc. of Finnish Wireless Comm. Workshop (FWCW 2002), Helsinki, May 2002.

    M.Y. Cheong, N. Nefedov, “Convergence and Performance Evaluation of CMA Blind and Semi-Blind Equalizers”, in Proc. of Finnish Wireless Comm. Workshop (FWCW 2002), Helsinki, May 2002.

    N. Nefedov, “Comparison of Low Complexity Turbo-Like Coding Structures”, in Proc. of IEEE ICC '2001, pp. 50-54, Helsinki, June 11-14, 2001.

    N. Nefedov, D. Foursov, “An EM-based Receiver for Short Block Semi-Blind Detection”, in Proc. of IEEE Int. Conf. on Telecomm. (ICT 2001), pp.70-75, Bucharest, June 4-7, 2001.

    N. Nefedov, “Application of Iterative Estimation-Detection Algorithms for Packet Data Transmission”, in Proc. IEEE 6th Int. Symp.Comm. Theory and Applications (ISCTA 2001), pp.421-426, UK, July 2001.

    N. Nefedov, “On Application of Joint Channel and Data Estimation Algorithms for Short Block Detection”, in Proc IEEE PIMRC’2001, San-Diego, Oct 1-4, 2001.

    N. Nefedov, “Discrete Channel Models Building for Wide-Band Error Control Strategies Evaluation”, Int. Journal of Wireless Information Networks (IJWIN), pp.19-28, vol.7, No.1, 2000, Kluwer Academic Publ. Group.

    J.Salo, N. Nefedov, “Performance Evaluation of a Per-Survivor Processing Soft-output Detector in GSM EDGE Environment”, in Proc. of Finnish Wireless Comm. Workshop (FWCW 2000), pp.7-11, May 29-30 Oulu, Finland, 2000.

    N. Nefedov, “Comparison of Low Complexity Turbo Codes”, in Proc. of IEEE Int.Conf. on Telecomm., (ICT’2000), vol.1, pp.686-690, Acapulco, Mexico, May 22th -25th, 2000.

    N. Nefedov, M.Pukkila, “Iterative Channel Estimation for GPRS”, in Proc. of IEEE PIMRC’2000, pp.999-1003, London, Sept 18-22, 2000.

    N.Nefedov, M.Pukkila, “Turbo Equalization and Iterative (Turbo) Estimation Techniques for Packet Data Transmission”, in Proc. of 2nd Int. Symp. Turbo Codes (ISTC 2000), pp.423-426, Sept.4-7, Brest, France, 2000.

    N. Nefedov, “Performance of Low Complexity Accumulated Convolutional Codes”, in Proc. of 2nd Int. Symp. Turbo Codes (ISTC 2000), pp.419-422, Sept.4-7, Brest, France, 2000.

    N. Nefedov, “Potential Physical Layer Enhancements for AMR Speech over EDGE”, in Proc. IEEE VTC-Fall 2000, vol.3, Boston, USA, Sept.24-28, 2000.

    N. Nefedov, “Performance of Low Complexity Turbo-like Codes”, in Proc. of IEEE Int. Symp. Inf. Theory and its Applications (ISITA'2000), pp.354-357, Honolulu, USA, Nov.5-8, 2000.

    N. Nefedov, “Serially Concatenated Codes for EDGE Channel Coding”, in Proc. of IEEE Int. Conf. Telecomm., (ICT’99), vol.2, pp.123-127, Cheju, South Korea, June 15th -18th, 1999.

    N. Nefedov, “Application of Low Complexity Serially Concatenated Codes for EDGE Circuit Switched Data”, in Proc. of IEEE PIMRC’99, pp.573-577, Osaka, Japan, Sept 12-16, 1999.

    S. Hamiti, M.Hakaste, M.Mosio, N.Nefedov, E.Nikula, H.Vilpponen, “EDGE Circuit Switched Data – An Enhancement of GSM Data Services”, in Proc. of IEEE Wireless Comm, and Networking Conf., (WCNC’99), pp. 1437-1441, New Orleans, USA, Sept. 21st -24th, 1999.

    S. Hamiti, M.Hakaste, M.Mosio, N.Nefedov, E.Nikula, H.Vilpponen, “ECSD for Real Time Services over GSM”, in Proc. of IEEE VTC’99-Fall, pp.578-582, Amsterdam, Sept. 19-22, 1999.

    N.Nefedov, “Graphical Models For Iterative Data Processing”, in Proc. of URSI/IEEE XXIV Convention on Radio Science, pp.64-65, October 4-5, Turku, Finland.

    N. Nefedov, "Discrete Channel Models for Wireless Data Services", in Proc. of IEEE VTC’98, vol.1, pp. 874-877, Ottawa, 16-21 May 1998.

    N. Nefedov, “Application of Serially Concatenated Interleaved Codes for Wireless Data Transmission”, in Proc. of IEEE Int.Symp. Wireless Comm. (ISWC’98), p.7, Montreal, 21-22 May 1998.

    N. Nefedov, “Discrete Channel Models for Evaluation of Error Control Strategies in CDMA”, in Proc. of IEEE Int. Symp. on Spread Spectrum Techniques and Applications, (ISSSTA’98), vol.1, pp.245-249, Sun city, South Africa, 2-4 September 1998.

    N. Nefedov, “Realistic Discrete Channel Models for Error Control Strategies Evaluation”, in Proc. of IEEE Int. Telecomm. Symp., (ITS’98), vol.1, pp.37-42, Sao Paulo, Brazil, August 1998.

    N. Nefedov, “Generative Markov Models for Discrete Channel Modelling”, in Proc. of IEEE Int. Symp. on Personal, Indoor and Mobile Comm. (PIMRC'97), vol.1, pp.7-11, September 1997, Helsinki.

    N. Nefedov, “Markov Models for Discrete Channel Modelling”, in Proc. of URSI/IEEE/IRC Convention on Radio Science, pp.119-120, October 1996, Espoo, Finland.

    N. Nefedov, “Realistic Discrete Channel Models for Wireless Data Services”, in Proc. of IRC Workshop'97, Report IRC-5, pp.85-87, Espoo, Finland, October 1997.

     

    Technical reports, Standards, Specifications

     

     

     

     

  • ETSI SMG2, CR 05.03 “Channel coding for Enhanced Circuit Switched Data in EDGE”, 1999.

     

     

     

     

    • Patents

    Patents granted: 9

    Applications pending: 12