Karabetsos Sotiris

Sotiris Karabetsos 


Office: A011, Building A, Ancient Olive Grove Campus

Office Phone: +30 210 538-1597

Lab: ZB203, ZB204. ZB211, Building Z, Αncient Οlive-grove Campus

e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Office hours with Students: Monday (14.00-15.00) and Wednesday (14.00-15.00) or upon request





2010: PhD in Electrical and Computer Engineering, School of Electrical and Computer Engineering, National Technical University of Athens, Greece

2003: Master (M. Sc.) in Data Communication Systems, Electronic & Electrical Engineering Department, Brunel University, London, UK.

2004: Degree (M. Eng. Diploma) in Electrical and Computer Engineering, School of Electrical and Computer Engineering, National Technical University of Athens (N.T.U.A.)

1999: B. Sc. in Electronics Engineering, Technological Educational Institution (T.E.I.) of Athens.


Ερευνητικά Ενδιαφέροντα

  • Broadband Communications,
  • Modulation schemes for wired/wireless and optical communications systems and standards,
  • Software Defined Radio,
  • Digital Signal Processing,
  • Digital Speech Processing and Analysis,
  • Speech Synthesis,
  • Computational Intelligence and Machine Learning.


Research Interests

  • Nikas, T., Pikasis, E., Karabetsos, S., Syvridis, D., "Compensation of Multicore Fiber Skew Effects for Radio over Fiber mmWave Antenna Beamforming", IEEE Journal of Lightwave Technology, DOI: 10.1109/JLT.2019.2961557, December, 2019.
  • Zantalis F., Koulouras G., Karabetsos S. and Kandris D., “A review of Machine Learning and IoT in Smart Transportation”, Future Internet, MDPI, 11(4), 94, doi: 10.3390/fi11040094, 2019
  • E. Pikasis, S. Karabetsos, T. Nikas, P. Chvojka, A. Nassiopoulos, D. Syvridis, “Comparison of CAP and DFT-spread DMT for high speed transmission over 50m SI-POF”, in proc. of IEEE 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP 2016), DOI: 10.1109/CSNDSP.2016.7573941, July, 2016.
  • Pikasis, E., Karabetsos, S., Nikas, T., Syvridis, D., "Rate-adaptive DFT-spread DMT and CDMA-DMT for 1-mm SI-POF short-range links", IEEE Photonics Technology Letters 25 (16), art. no. 6547693 , pp. 1574-1577, 2013.
  • S. Karabetsos, E. Pikasis, T. Nikas, A. Nassiopoulos and Syvridis, D., "DFT-spread DMT modulation for 1-Gb/s transmission rate over 100 m of 1-mm SI-POF", IEEE Photonics Technology Letters, 24(10), pp. 836-838, 2012.
  • Karabetsos S., Tsiakoulis P., Chalamandaris A., Raptis S., "One-Class Classification for Spectral Join Cost Calculation in Unit Selection Speech Synthesis", IEEE Signal Processing Letters, August 2010, Vol. 17, No. 8, pp. 746-749, 2010.
  • S. Karabetsos, P. Tsiakoulis, A. Chalamandaris, S. Raptis, "Embedded Unit Selection Text-to-Speech Synthesis for Mobile Devices”, IEEE Transactions on Consumer Electronics, May 2009, Issue 2 – Vol. 55, pp. 613-621, 2009.
  • S. Karabetsos, S. Mikroulis, and A. Nassiopoulos, "Radio over Fiber for Broadband Communications: a promising technology for Next Generation Networks", Book Chapter in “Handbook of Research on Heterogeneous Next Generation Networking: Innovations and Platform”, (Eds. Prof. S. Kotsopoulos and Dr. K. Ioannou), ISBN: 978-1-60566-108-7, Ref: IGR26196, Information Science Reference (an imprint of IGI Global), IGI Global, pp. 80-103, 2009.
  • G. Stoumpis, S. Karabetsos, A. Nassiopoulos, "An Experimental Framework for Studying LTE and LTE-Advanced", in proc. 19th Panhellenic Conference on Informatics (PCI 2015), ICPS Series, ACM Digital Library, doi10.1145/2801948.2801985 pp. 275-280, 2015.
  • Karabetsos S., Stoumpis G., Pikasis E., Nikas T., Papanikolaou J., Koulouras G. and Nassiopoulos A., “Deployment of 5GHz Real-Time Simplex Wireless SISO- And MISO-OFDM Transmission Using Matlab and the TMS320C6713 DSKs'”, in Proc. 6th Texas Instruments & IEEE European Embedded Design in Education and Research Conference (EDERC 2014), Milan, Italy, 11-12 September, 2014.
  • Raptis S., Karabetsos S., Chalamandaris A., Tsiakoulis P., "A Framework towards Expressive Speech Analysis and Synthesis with Preliminary Results", Journal on Multimodal User Interfaces (JMUI), DOI: 10.1007/s12193-015-0186-3, Vol. 9, Issue 4, pp. 387-394, Springer, 2015.


Undergraduate Courses

  • Telecommunications
  • Wideband Communications
  • Digital Audio and Speech Technologies
  • Telecommunication Systems Design


Postgraduate Courses

  • 4G/5G Communication Systems
  • Software Defined Radio
  • Digital Processing of Audio and Speech Signals


Curriculum Vitae


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