Dr.-Ing. Erik Haas DLR Oberpfaffenhofen P.O. Box 1116 D-82230 Wessling Germany Tel: +49-8153-28-2868 Fax: +49-8153-28-1442 E-Mail: Erik.Haas@dlr.de

Areas of Involvement:

• Projects
• Broadband VHF (B-VHF):
  Aeronautical Communication System based on MC-CDMA.
  
• European Airport Movement Management by A-SMGCS (EMMA):
  Validating the Advanced Surface Movement Guidance and Control System (A-SMGCS) concept as an integrated air-ground system, seamlessly embedded in the overall Air Traffic Management (ATM) system.
• Taxi And Ramp Management And Control (TARMAC):
  Typical realisation of a complete A-SMGCS with additional possibilities for analysis, testing and simulation.
• Huygens Delta Flight Acceptance Review (Delta-FAR):
  Review of the new mission scenario designed to recover from the Huygens radio receiver design fault.
• Future VHF (fVHF):
  Investigation of the performance and the capability of VHF Digital Link (VDL) Mode 3 and VDL Mode 4 to support the future aeronautical data communication requirements in Europe for applications requiring predictable Quality of Service which cannot be supported by VDL Mode 2.
  
• Leader of the Digital Signal Processing (DSP) Laboratory for aeronautical communications and Multi-Carrier (MC) systems
  
• Multi-Carrier Transmission Techniques
• Orthogonal Frequency Division Multiplexing (OFDM)
• OFDM based multi-carrier multiple access techniques, especially
  Multi-Carrier Code Division Multiple Access (MC-CDMA) and
  Orthogonal Frequency Division Multiple Access (OFDMA)
• Two-Dimensional Decision-Feedback (2D-DF) pilot and data symbol correction for coherent receivers
  
• Two-Dimensional Differential Demodulation (2D-DD) for differential coherent receivers
  
• Time-, Frequency- and Data-Synchronisation
• Overlay Systems
  
• Interference Avoidance and Suppression
  
• Aeronautical Communications
• Aeronautical Channel Modeling
• Advanced Airport Data Link (ADL)
• Future aeronautical communications systems for Air Traffic Control (ATC) and ATM
  
• Digital aeronautical communications: Future VHF digital link VDL Modes 2, 3, 4
• Analogue voice communications: DSB-AM with 25 kHz and 8.33 kHz channel spacing
• Mobile Radio Communications
• Fourth generation mobile radio communications (4G)
  
• Broadcasting Systems
• Digital Audio Broadcasting (DAB)
• Digital Video Broadcasting (DVB)
• Simulation of Digital Communications Systems
• Java-based
• DSP-based
• SPW
  

Publications:

• "Design, Evaluation and Implementation of a Multi-Carrier Transmission System for Aeronautical Communications",
  Herbert Utz Verlag GmbH, Munich, Germany, 2003.

Books:

• Erik Haas, Stefan Kaiser: "Two-Dimensional Differential Demodulation of OFDM Frames", "Multi-Carrier Spread Spectrum and Related Topics", K. Fazel and S. Kaiser (Eds.), Boston: Kluwer Academic Publishers, December 1999, ISBN 0-7923-7740-0, pp. 125-132.

• Erik Haas, Michael Schnell: "Development and Implementation of an Advanced Airport Data Link Based on Multi-Carrier Communications", "Multi-Carrier Spread Spectrum and Related Topics", K. Fazel and S. Kaiser (Eds.), Boston: Kluwer Academic Publishers, 2002, ISBN 0-7923-7653-6, pp. 85-95.

Journals:

• Erik Haas: "Performance Improvement of a Discriminator Receiver through the Implementation of a Non-Linear Decision", IEEE Communications Letters, Vol. 3, No. 6, June 1999, pp. 166-168.
  

• E. Haas, H. Lang and M. Schnell, "Development and implementation of an advanced airport data link based on multi-carrier communications," European Transactions on Telecommunications: 3rd Special Issue on Multi-Carrier-Spread-Spectrum, vol. 13, no. 5, September/October 2002.
  
  
• Erik Haas: "Aeronautical Channel Modelling", IEEE Transactions on Vehicular Technology, Vol. 51, No. 2, pp. 254-264, March 2002.

• E. Haas and S. Kaiser, "Two-Dimensional Differential Demodulation for OFDM," IEEE Transactions on Communications, Vol. 51, No. 4, April 2003.

Conferences:

• E. Haas, "Untersuchung und Simulation des Physical Layer eines D8PSK-modulierten TDMA-Systems", Proceedings Workshop Kommunikationstechnik, Technische Universität Hamburg-Harburg, Germany, September 1997.

• E. Haas, "Improvement of the BER-Performance of a Discriminator Receiver through the Implementation of a Non-Linear Decision", Proceedings 9. Joint Conference on Communications and Coding 1998, Courmayeur,  Italy, January 1998.
  
  
• E. Haas, "Improvement of the BER-Performance of a Discriminator Receiver through the Implementation of a Non-Linear Decision", Kleinheubacher Tagung 1998, Kleinheubach, Germany, September 1998.

• E. Haas, P. Höher, H. Lang and U.-C. Fiebig, Future VHF Architecture Implementation Study; WP 5000: Physical Layer; Final Report, EUROCONTROL, June 1999.
  
  
• E. Haas, "A Novel Non-Linear Decision Algorithm for Simple Receiver Structures",Proceedings Third Workshop for Communications Technology, Schloss Reisenburg, Germany, July 1999.
  
  
• E. Haas and S. Kaiser, "Two-Dimensional Differential Demodulation of OFDM Frames", Proceedings Second International Workshop on Multi-Carrier Spread-Spectrum (MCSS'99), Oberpfaffenhofen, Germany, September 1999.
  
  
• P. Höher and E. Haas, "Aeronautical Channel Modeling at VHF-Band", Proceedings IEEE Vehicular Technology Conference (VTC'99 - Fall), Amsterdam, The Netherlands, September 1999, pp. 1961-1966.

• E. Haas and S. Kaiser, "Analysis of two-dimensional differential demodulation for OFDM," in Proceedings 5th International OFDM-Workshop in Hamburg, Hamburg, Germany, paper no. 16, September 2000.
  
  
• E. Haas and S. Kaiser, "Analysis of Two-Dimensional Differential Demodulation for OFDM,"  in Proceedings IEEE Global Telecommun. Conf. (GLOBECOM 2000), San Francisco, USA, Nov./Dec. 2000, pp. 751-755.

• E. Haas and M. Schnell, "Development of an advanced airport data link," in Proceedings Deutscher Luft- und Raumfahrtkongress 2001, Hamburg, Germany, September 2001.
  
  
• S. Kaiser, M. Schnell, A. Dammann, E. Haas, R. Raulefs, "Multi-Carrier Based Air Interface," Proceedings 2nd Wireless World Research Forum (WWRF), Wireless World Research Forum (WWRF), The second WWRF meeting in Helsinki, May 10-11, 2001.

• A. Arkhipov, E. Haas, B. Kunz, H. Lang, F. Pupeter, et al.: "ADL - Advanced Airport Data Link," Abschlussdemonstration TARMAC-Projekt, Braunschweig, 24. April 2002, DLR, 2002.
  
  
• E. Haas, A. Arkhipov, B. Kunz, H. Lang, F. Pupeter, et al.: "Der "Advanced Airport Data Link" - Konzept und Demonstrator für einen modernen Flughafen-Datenlink," DGLR-Workshop "Data Link und Informationsmanagement", München, 16. Mai 2002, DGLR, 2002.
  
  
• E. Haas, H. Lang and M. Schnell, "Development and implementation of an advanced airport data link based on multi-carrier communications, Proceedings IEEE 7th International Symposium on Spread Spectrum Techniques and Applications (ISSSTA 2002), Prague, Czech Republic, September 2002.
  
  
• E. Haas and M. Schnell, "Analysis of compensation methods for OFDM implementation effects," Proceedings IEEE 5th International Symposium on Wireless Personal Multimedia Communications (WPMC 2002), Honolulu, Hawaii, pp. 1000-1004, October 2002.

• E. Haas, M. Schnell: "Advanced Airport Data Link - Concept and Demonstrator Implementation for a Modern Airport Data Link," Third Integrated Communications, Navigation and Surveillance Technologies Conference and Workshop (ICNS 2003), Annapolis, Maryland, May 19-22, 2003,, NASA John H. Glenn Research Center, Cleveland Ohio, Proceedings of ICNS 2003, 2003.

• E. Haas, W. Krzymien: "Improved MC-CDMA Reception Employing Two-Dimensional Decision-Feedback Pilot and Data Symbol Correction," Proceedings 2004 IEEE International Symposium on Spread Spectrum Techniques and Applications (ISSSTA 2004), Sydney, Australia, 30 August - 2 September, 2004.
  
  
• E. Haas, W. Krzymien: "Coherent OFDM Receiver with Two-Dimensional Decision-Feedback Pilot and Data Symbol Correction," Proceedings of the 9th International OFDM-Workshop 2004 (InOWo'04), Dresden, Germany, 15./16. September, 2004.

Patents:

• E. Haas and S. Kaiser, Differentielle Demodulation in zwei oder mehr Dimensionen, European Patent Application Nr. EP 1 085 741.

Others:

• Member IEEE
• Visiting Post-Doctoral Fellow at the University of Alberta (UoA) and TRLabs, Edmonton, Canada, May - September 2003
• Dissertation at the University of Essen, Institute for Experimental Mathematics, October 2002
  
• Visiting Student at the University of Sussex, Brighton, England, January - June 1996
• Student at the Technical University of Munich (TUM), Munich, Germany, 1991 - 1996
  
• Hobbies: Photography, Music, Travelling, Electronics, Reading, Skiing, Snowboarding, Rollerblading, Cycling

Author:Erik.Haas@dlr.de