Dr KOSTAS DANGAKIS
Kostas Dangakis was born in
Since 1977 and for a decade, he has worked at the Department of Electronics, National Center for Scientific Research (NCSR) "Demokritos", in projects relating to voice/data/video signal encryption, synchronization techniques in TDM systems, digital modulation techniques/data transmission, Spread Spectrum/ CDMA techniques, wireless networks.
Then he has worked at the Institute of Informatics & Telecommunications (IIT) of NCSR “Demokritos”, as a Senior Researcher until 1994 and as Research Director until now. During this period he has been head of the Mobile Communications Laboratory, co-ordinator of five national and international R&D projects and participated in more than fifteen other projects. His published work includes more than 80 publications in technical journals or proceedings of international conferences, as well as many studies and technical reports.
All these years he has been elected as member of the Scientific Advisory Board of the Institute and Chairman of this Board (for six years), also head of the Telecommunications Sector for several years and Acting Director of the Institute (for one year).
has been teaching Telecommunications courses for post graduate students of IIT and, for more than ten years,
Communications Theory and Cellular Systems in courses for postgraduate students
at the Department of Physics /
His recent R&D activities and interest focus in the following:
· Signal propagation in mobile communication systems, path loss prediction models (evaluation of existing and development of new, improved models based on processing of radio coverage measurements data.
· Interaction between human body and antenna, development of new methods for measurement of electromagnetic fields and protection from exposure to electromagnetic radiation, design of new antennas offering better performance and less human exposure to electromagnetic radiation.
· Smart antennas and Multiple Input Multiple Output (ÌÉÌÏ) systems: antenna design, development and characterization, wearable antennas, wireless channel analysis/modeling and system level evaluation.
· Air Interface of modern telecommunications systems, evolution and integration of them in systems of third or fourth generation, software radio, ultra wideband communications.
K. DAGAKIS, “Study of Systems for the transmission
of digital signals through analog channels of limited bandwidth”, PhD Thesis,
Á1. K. DAGAKIS, CH. MANTAKAS, G. PAPADOPOULOS, “New Technique for Channel Synchronization in Time Division Multiplexing”, ELECTRONICS LETTERS, 4th Dec. 1980, vol. 16, No 25, p.p. 944-945.
Á2. CH. MANTAKAS, K. DAGAKIS, V. ZACHAROPOULOS, “Voice Encryption in Multichannel Paths”, The Radio and Electronic Engineer, vol. 52, No 5, p.p. 235-238, May 1982.
Á3. K. DAGAKIS and G. PAPADOPOULOS, “Spectral Analysis and Implementation of Duobinary FSK Systems Working at High Bit Rates”, IEEE Trans. on Communications, vol. COM-31, No 6, p.p. 811-816, June 1983.
Á4. CH. MANTAKAS, K. DAGAKIS, V. ZACHAROPOULOS, “Method for the Generation of M-ary Constant-Envelope PSK Signals”, ELECTRONICS LETTERS, 1st Aug. 1985, vol. 21, No 16, p.p. 676-677.
Á5. V. ZACHAROPOULOS, CH. MANTAKAS, K. DAGAKIS, K. KAROUMBALOS, “An Analogue Scrambling Scheme for Television Signals”, International Journal of Electronics, vol. 59, No 4, p.p. 501-509, 1985.
Á6. A. A. ALEXANDRIDIS, K. DANGAKIS, V. MAKIOS, CH. MANTAKAS, “Use of Synchronous CDMA Techniques with Short Coding Sequences in the Development of a Local Communication Network”, ÉÍÔ. J. ELECTRONICS, 1990, VOL. 68, NO. 6, 939-956.
Á7. A. A. ALEXANDRIDIS, K. DANGAKIS, V. MAKIOS and C. MANTAKAS, “Communication Protocol for a Local Network Based on Code Division Multiplexing”, INT. J. ELECTRONICS, 1991, VOL. 70, No. 6, 1031-1040.
Á8. A. KOURTIS, K. DANGAKIS, V. ZACHAROPOULOS and C. MANTAKAS, “Analogue Time Division Multiplexing”, INT. J. ELECTRONICS, 1993, VOL. 74, NO. 6, 901-907.
Á9. F. LAZARAKIS, G. S. TOMBRAS, and K. DANGAKIS, “Average Channel Capacity in a Mobile Radio Environment with Rician Statistics”, IEICE Transactions on Communications, Special Issue on Personal, Indoor and Mobile Radio Communications, Vol. E77-B No. 7 pp. 971 - 977 (1994).
Á10. F. LAZARAKIS, A. A. ALEXANDRIDIS, K. DANGAKIS, G. S. TOMBRAS, P. KOSTARAKIS, “Evaluation of a Terrain-Based Point-to-Point Propagation Model in the 900 MHz band,” International Journal of Communication Systems, Vol. 10, No. 2, 1997, pp. 65-71.
Á11. A. P. LEROS, A. A. ALEXANDRIDIS, K. DANGAKIS, P. KOSTARAKIS, “Feasibility of Neural Networks in Modeling Radio Propagation for Field Strength Prediction,” International Journal of Communication Systems, Vol. 11, No. 6, pp. 359-368, 1998.
Á12. A.A.ALEXANDRIDIS, K. DANGAKIS, P. KOSTARAKIS, F. LAZARAKIS, “A method of accurate determination of azimuthal distribution of received RF power”, International Journal of Communication Systems, Vol. 14, No. 2, pp 189 -197, 2001.
Á13. A.A.ALEXANDRIDIS, F. LAZARAKIS, K. DANGAKIS, P. KOSTARAKIS, A. KOURTIS, “Normalization of Propagation Measurements with respect to Terrain Effect”, International Journal of Communication Systems, Vol. 14, No. 3, pp 333 -343, 2001.
Á14. T. Zervos, A.A. Alexandridis, V.V. Petrović, K. Dangakis, B.M. Kolundžija, A.R. Đorđević, C.F. Soras, "Mobile phone antenna performance and power absorption in terms of handset size and distance from user's head", Wireless Personal Communications, Springer, Vol. 33, No.2, pp 109-120, April 2005.
Á15. T. ZERVOS, A.A. ALEXANDRIDIS, F. LAZARAKIS, K. DANGAKIS, C. SORAS, “Array Factor measurements: a preliminary stage in a methodology for Smart Antenna characterization measurements”, WSEAS Transactions on Communications, Vol. 4, Issue 10, pp.1108-1115, October 2005.
Á16. A. ALEXIOU, P. KOSTARAKIS, V. N. CHRISTOFILAKIS, T. ZERVOS, A. A. ALEXANDRIDIS, K. DANGAKIS, C. SORAS, V. V. PETROVIĆ, B. M. KOLUNDŽIJA and A. R. DORDEVIĆ, “Interaction Between GSM Handset Helical Antenna and User's Head: Theoretical Analysis and Experimental Results”, The Environmentalist, Publisher: Springer Science+Business Media B.V., Formerly Kluwer Academic Publishers B.V, ISSN: 0251-1088 (Paper) 1573-2991 (Online),DOI: 10.1007/s10669-005-4286-6, Issue: Volume 25, Numbers 2-4, December 2005, pp 215 – 221, Special Issue: Biological Effects of Electromagnetic Fields.
Á17. E. S. Angelopoulos, A. Z. Anastopoulos, D. I. Kaklamani, A. A. Alexandridis, F. Lazarakis, K. Dangakis, “A Novel Wideband Microstrip-Fed Elliptical Slot Array Antenna for Ku-Band Applications”, Wiley, Microwave and Optical Technology Letters, Vol. 48, No. 9, pp. 1824-1828, September 2006.
Á18. Angelopoulos E.S., Anastopoulos A.Z., Kaklamani D.I., Alexandridis A.A., Lazarakis F., Dangakis, K., “Circular and Elliptical Cpw-Fed Slot and Microstrip-Fed Antennas for Ultrawideband Applications”, IEEE Antennas and Wireless Propagation Letters, Volume 5, 2006, pp. 294 – 297.
Á19. T. Zervos, K. Peppas, F. Lazarakis, A. A. Alexandridis, K. Dangakis, C. Soras, “Channel Capacity Evaluation for a MIMO Terminal in the Presence of User’s Hand”, IET Microwaves, Antennas & Propagation, special issue on Antenna Systems and Propagation for Future Wireless Communications, vol.1, no.6, December 2007, pp. 1137-1144.
Á20. V. N. Christofilakis, P. Kostarakis, A. A. Alexandridis, F. Lazarakis, K. Dangakis, “Increasing Direction-of-Transmission Resolution in Digital Time-Delay Beamformers”, International Journal of Electronics and Communications (AEU), vol.62, no.1, 2008, pp. 49-56.
Á21. K. Peppas, F. Lazarakis, A. Alexandridis, K. Dangakis, “Error Performance of Digital Modulation Schemes with MRC Diversity Reception over ç-ì fading channels”, IEEE Trans. on Wireless Communications, Volume 8, Issue 10, Page(s):4974 – 4980, October 2009.
Á22. Nikos C. Sagias, Fotis I. Lazarakis, Antonis A. Alexandridis, Kostas P. Dangakis and George S. Tombras, “Higher Order Capacity Statistics of Diversity Receivers”, Wireless Personal Communications, DOI 10.1007/s11277-009-9837-6, Published online: 5 November 2009.
Á23. K. Peppas, F. Lazarakis, A. Alexandridis, K. Dangakis, “Cascaded Generalized-K Fading Channel”, ÉÅÔ Communications, vol. 4, No.1, Jan 2010, pp. 116-124.
Á24. Peppas K, F. Lazarakis, T. Zervos, A. Alexandridis and K. Dangakis, “Sum of Non-Identical Independent Squared ç-ì Variates and Applications in the Performance Analysis of DS-CDMA Systems”, 2010, IEEE Transactions on Wireless Communications, 9(9), pp. 2718-2723.
Á25. Kostas Peppas, Fotis Lazarakis, Charalambos Skianis, Antonis A. Alexandridis, and Kostas Dangakis, “Impact of MIMO Techniques on the Interoperability between UMTS-HSDPA and WLAN Wireless Systems”, IEEE Surveys and Tutorials (accepted for publication).
Additionally, over 57 Conference papers in the area of Wireless Communications.
Dr. Dangakis’s research work has been cited more than 120 times by independent researchers.