George S. Tombras

G. S. Tombras was born in Athens, Greece, in 1956. He received the B.S. degree in physics from Aristotelian University of Thessaloniki, Greece, the M.S. degree in electronics from University of Southampton, UK, and the Ph.D. degree from Aristotelian University of Thessaloniki, in 1979, 1981, and 1988, respectively. From 1981 to 1989, he was a Teaching and Research Assistant and, from 1989 to 1991, he was a Lecturer at the Laboratory of Electronics, Physics Department, Aristotelian University of Thessaloniki. From 1990 to 1991, he was with the Institute of Informatics and Telecommunications of the National Center for Science Research “Demokritos,” Athens, Greece. Since 1991, he has been with the Laboratory of Electronics, Department of Physics, University of Athens, where he is currently an Associate Professor of Electronics. His research interests include mobile communications, analog and digital circuits and systems, as well as instrumentation, measurements, and audio engineering. Professor Tombras is the author of the textbook Introduction to Electronics (in Greek) and has authored or coauthored more than 70 journal and conference papers and many technical reports.

Biography Updated on 26 August 2006

Articles in Scholarly Journals [Incomplete List]

  1. Description of a 2-Bit Adaptive Sigma-Delta Modulation System with Minimized Idle Tones
    EURASIP Journal on Advances in Signal Processing, vol. 2008, Article ID 426502, 6 pages, 2008
  2. A 2-bit Adaptive Delta Modulation System with Improved Performance
    EURASIP Journal on Advances in Signal Processing, vol. 2007, Article ID 16286, 5 pages, 2007
  3. On the cascaded Weibull fading channel model
    Journal of the Franklin Institute, vol. 344, no. 1, pp. 1–11, 2007
  4. Spectral efficiency of a single-cell multi-carrier DS-CDMA system in Rayleigh fading
    Journal of the Franklin Institute, 2006
  5. Average output SNR of equal-gain diversity receivers over correlative Weibull fading channels
    European Transactions on Telecommunications, vol. 16, no. 6, pp. 521–525, 2005
  6. Spectral efficiency for selection combining RAKE receivers over Weibull fading channels
    Journal of the Franklin Institute, vol. 342, no. 1, pp. 7–13, 2005
  7. Spectral efficiency of a cellular MC/DS-CDMA system in Rayleigh fading
    International Journal of Communication Systems, vol. 18, no. 8, pp. 795–801, 2005
  8. New results for the Shannon channel capacity in generalized fading channels
    IEEE Communications Letters, vol. 9, no. 2, pp. 97–99, 2005
  9. Memory Effects in EM Emission During Uniaxial Deformation of Dielectric Crystalline Materials
    IEEE Geoscience and Remote Sensing Letters, vol. 2, no. 2, pp. 118–120, 2005
  10. Equal-Gain and Maximal-Ratio Combining Over Nonidentical Weibull Fading Channels
    IEEE Transactions on Wireless Communications, vol. 4, no. 3, pp. 841–846, 2005
  11. Average Output SINR of Equal-Gain Diversity in Correlated Nakagami-<tex>$m$</tex>Fading With Cochannel Interference
    IEEE Transactions on Wireless Communications, vol. 4, no. 4, pp. 1407–1411, 2005
  12. Channel Capacity and Second-Order Statistics in Weibull Fading
    IEEE Communications Letters, vol. 8, no. 6, pp. 377–379, 2004
  13. Performance Analysis of Dual Selection Diversity in Correlated Weibull Fading Channels
    IEEE Transactions on Communications, vol. 52, no. 7, pp. 1063–1067, 2004
  14. On the Detection of Acoustic and Electromagnetic Signals Before Fracture of Dielectric Crystalline Materials
    IEEE Geoscience and Remote Sensing Letters, vol. 1, no. 3, pp. 162–165, 2004
  15. Average channel capacity for generalized-selection combining RAKE receivers
    European Transactions on Telecommunications, vol. 15, no. 5, pp. 497–500, 2004
  16. Error-rate analysis of switched diversity receivers in Weibull fading
    Electronics Letters, vol. 40, no. 11, p. 681, 2004
  17. Spectral efficiency of adaptive hybrid DS/FFH CDMA in Rayleigh fading
    Electronics Letters, vol. 39, no. 1, p. 145, 2003
  18. Optimal hop number of adaptive hybrid DS/FFH CDMA in Rayleigh fading
    Electronics Letters, vol. 39, no. 6, p. 557, 2003
  19. Performance analysis of switched diversity receivers in Weibull fading
    Electronics Letters, vol. 39, no. 20, p. 1472, 2003
  20. Selection diversity receivers in Weibull fading: outage probability and average signal-to-noise ratio
    Electronics Letters, vol. 39, no. 25, p. 1859, 2003
  21. Average channel capacity for Rake receivers
    Electronics Letters, vol. 38, no. 10, p. 475, 2002
  22. Spectral efficiency for a hybrid DS/FH code-division multiple-access system in cellular mobile radio
    IEEE Transactions on Vehicular Technology, vol. 50, no. 6, pp. 1321–1327, 2001
  23. Analog Integrated Circuits and Signal Processing, vol. 19, no. 3, pp. 295–301, 1999
  24. Comparative estimate of user capacity for FDMA and direct-sequence CDMA in mobile radio
    International Journal of Electronics, vol. 83, no. 1, pp. 133–144, 1997
  25. Evaluation of a terrain-based point-to-point propagation model in the 900 MHz band
    International Journal of Communication Systems, vol. 10, no. 2, pp. 65–71, 1997
  26. Spectral efficiency of direct-sequence code-division multiple-access in cellular mobile radio
    International Journal of Communication Systems, vol. 10, no. 5, pp. 247–252, 1997
  27. Nonlinear dynamics of femtosecond optical solitary wave propagation at the zero dispersion point
    IEEE Journal of Quantum Electronics, vol. 31, no. 1, pp. 183–189, 1995
  28. A line coding format for the output of a two-digit adaptive delta modulation system
    International Journal of Electronics, vol. 73, no. 2, pp. 263–270, 1992
  29. 1-Bit delayed encoding improves continuously variable slope delta modulator performance
    International Journal of Electronics, vol. 73, no. 3, pp. 549–554, 1992
  30. An externally triggered CMOS triangular pulse generator
    International Journal of Electronics, vol. 73, no. 3, pp. 615–620, 1992
  31. Implementation of a two-digit adaptive delta modulator
    International Journal of Electronics, vol. 69, no. 6, pp. 767–776, 1990
  32. New adaptation algorithm for a two-digit adaptive delta modulation system
    International Journal of Electronics, vol. 68, no. 3, pp. 343–349, 1990
  33. Running average error reduces overload noise in delayed delta-modulation systems
    International Journal of Electronics, vol. 65, no. 6, pp. 1105–1115, 1988
  34. Delayed encoding delta-modulation system with optimum performance
    International Journal of Electronics, vol. 59, no. 3, pp. 343–354, 1985