Prof. Dr.-Ing. Karl-Dirk Kammeyer (Former Head of Department)

Address: University of Bremen Dept. of Communications Engineering Otto-Hahn-Allee NW1 D-28359 Bremen - Germany Room :NW1 N2360 Phone : +49 421 218 62389 E-mail :

Teaching

Research

• Study on the performance of two given speech recognition devices under different acoustic propagation conditions
• Optimization of an OFDM transmission system according to the Hiperlan/2 standard
• Analysis of service quality of a Bluetooth based access system in a car environment
• Feasibility study for DÜNE
• Multicarrier Codemultiplex concepts with M-ary orthogonal modulation schemes for use in cellular mobile radio networks
• Development and analysis of new concepts and algorithms for the digital baseband signal processing of a multistandard mobile station
• Usability of CDMA and OFDM for future mobile radio systems
• Development of a 16 QAM demodulator for a portable satellite phone M4
• Optimization of a new CDMA concept using a hybrid modulation scheme
• Optimization of blind algorithms for estimation and equalization of mobile radio channels by applying higher order statistics and second order cyclostationary statistics

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Publications

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1997

• Multi-Channel Speech Enhancement in a Car Environment using Wiener Filtering and Spectral Subtraction BibT_EX
  J. Bitzer, K.U. Simmer, K.-D. Kammeyer, K. U. Simmer
  IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 97), Vol. 2, pp. 1167-1170, Munich, Germany, 21. - 24. April 1997
• Broadband Beamforming with Adaptive Postfiltering for Speech Acquisition in Noisy Environments BibT_EX
  S. Fischer, K.-D. Kammeyer
  IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 97), Vol. 1, pp. 359-362, Munich, Germany, 21. - 24. April 1997
• Mehrkanalige Geräuschunterdrückung von gestörten Sprachsignalen in Kraftfahrzeuginnenräumen BibT_EX
  J. Bitzer, K.U. Simmer, K.-D. Kammeyer
  Fortschritte der Akustik (DAGA 97), pp. 382-383, Kiel, Germany, 3. - 6. March 1997

1996

• Adaptive Microphone Arrays for Speech Enhancement in Coherent and Incoherent Noise Fields BibT_EX
  S. Fischer, K.-D. Kammeyer, K.U. Simmer
  Invited talk at the 3rd joint meeting of the Acoustical Society of America and the Acoustical Society of Japan, Honolulu, Hawaii, 2. - 6. December 1996
• A New CDMA-Concept using Hybrid Modulation with Noncoherent Detection BibT_EX
  K.-D. Kammeyer, D. Nikolai
  IEEE Fourth Symposium on Communications and Vehicular Technology in the Benelux (SCVT 96), pp. 102-107, University of Gent, Belgium, 1. October 1996
• Noncoherent RAKE-Receiver with Optimum Weighted Combining and Improved Closed-Loop Power Control BibT_EX
  D. Nikolai, K.-D. Kammeyer
  IEEE Fourth International Symposium on Spread Spectrum Techniques and Applications (ISSSTA 96), Vol. 1, pp. 239-243, Mainz, Germany, 22. - 25. September 1996
• Vergleich zwischen OFDM und allgemeinen Multitraegerverfahren mit weicher Impulsformung BibT_EX
  K. Matheus, K.-D. Kammeyer
  1. OFDM-Fachgespräch, Braunschweig, Germany, 1. September 1996

1995

• Exploiting Second Order Cyclostationarity or Higher Order Statistics for the Blind Identification of Mixed Phase FIR Systems BibT_EX
  D. Boss, K.-D. Kammeyer, M. Boe
  15th GRETSI symposium, Vol. 1, pp. 57-60, Juan-les-Pins, France, 18. - 22. September 1995
• Geschlossene Lösungen zur blinden Entzerrung und Systemidentifikation BibT_EX
  K.-D. Kammeyer
  Frequenz, Vol. 49, No. 7/8, pp. 138-144, July 1995
• Decision-Feedback Eigenvector Approach to blind ARMA Equalization and Identification BibT_EX
  D. Boss, B. Jelonnek, K.-D. Kammeyer
  IEEE-SP/ATHOS Workshop on Higher-Order Statistics (SPW-HOS 95), pp. 320-324, Begur, Spain, 12. - 14. June 1995

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