Homepage: Athanasios Liavas (Technical University of Crete)
Homepage
Athanasios Liavas

Athanasios P. Liavas
Professor

Telecommunications Division
School of Electrical & Computer Engineering
Technical University of Crete
Kounoupidiana Campus
Chania - Crete, Greece 731 00

Email: liavasattelecom.tuc.gr
Phone: +30-28210-37224

 

 


Short CV

Athanasios Liavas received his Diploma and PhD from the University of Patras, in 1989 and 1993, respectively. From 1993 to 1995 he served in the Greek Army. He spent the years 1996 to 1998 at the Institut National des Télécommunications, Evry, France, as a Marie Curie postdoctoral Fellow. From 1999 to 2001, he was a visiting Assistant Professor at the Department of Informatics, University of Ioannina. In 2001, he became an Assistant Professor at the Department of Mathematics, University of the Aegean. In 2004, he joined the Department of Electronic and Computer Engineering (since 2016, renamed to School of Electrical and Computer Engineering - ECE), Technical University of Crete, as Associate Professor. In September 2009, he became Professor. He served as Department Chair from September 2009 to August 2011 and as Vice Chair from September 2011 to August 2013. Since December 2017, he serves as Dean of the ECE School.

Dr. Liavas served as an Associate Editor for the IEEE Transactions on Signal Processing from 2005 to 2009. He was an elected member of the IEEE SP COM Technical Committee from 2006 to 2011.

 


Publications

Journal paper re/pre-prints: Copyright © as noted on each article. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the copyright owner. By choosing to view one of these articles, you agree to all provisions of the copyright laws protecting it.

Preprints available upon e-mail request to liavas at telecom.tuc.gr

Publications in Journals
  1. A. Balatsoukas-Stimming and A. P. Liavas, "Design of LDPC Codes for the Unequal Power Two-User Gaussian Multiple Access Channel," IEEE Wireless Communications Letters, to appear. (pdf)
  2. A. P. Liavas, G. Kostoulas, G. Lourakis, K. Huang, and N. D. Sidiropoulos, "Nesterov-based Alternating Optimization for Nonnegative Tensor Factorization: Algorithm and Parallel Implementations," IEEE Transactions on Signal Processing, vol. 66, no. 4, Febr. 2018 (pdf) MPI_CODE
  3. K. Huang, N. D. Sidiropoulos, and A. P. Liavas, "A Flexible and Efficient Algorithmic Framework for Constrained Matrix and Tensor Factorization," ΙΕΕΕ Transactions on Signal Processing, Volume 64, Issue 19, 1 October 2016, Pages 5052-5065. (pdf)
  4. A.P. Liavas, and N.D. Sidiropoulos, "Parallel Algorithms for Constrained Tensor Factorization via the Alternating Direction Method of Multipliers," IEEE Trans. on Signal Processing,Volume 63, no. 20, October 2015, Pages 5450-5463. (pdf)
  5. A. P. Liavas and D. Tsipouridou, "Single-carrier systems with MMSE linear equalizers: performance degradation due to channel and CFO estimation errors," IEEE Trans. Signal Proc.,vol. 60, no 6, pp 3328-3334, June 2012. (pdf)
  6. G. N. Karystinos, and A. P. Liavas, "Efficient Computation of the Binary Vector that Maximizes a Rank-deficient Quadratic Form," IEEE Trans. on Information Theory, vol. 56, pp. 3581-3593, July 2010. (pdf)
  7. D. Tsipouridou and A. P. Liavas, "On the sensitivity of the MIMO Tomlinson-Harashima precoder with respect to channel uncertainties," IEEE Trans. on Signal Processing, vol. 58, no.4,pp. 2261-2272, April 2010. (pdf)
  8. D. Tsipouridou and A. P. Liavas, "On the sensitivity of the transmit MIMO Wiener filter with respect to channel and noise second-order statistics uncertainties," IEEE Trans. Signal Proc., vol. 56, no. 2, pp. 832-838, February 2008. (pdf)
  9. A. P. Liavas and D. Tsipouridou, "On the performance of the mismatched MMSE and the LS linear equalizers," IEEE Trans. Signal Proc., vol. 55, no. 7, part 1, pp. 3302-3311, July 2007.(pdf)
  10. A. P. Liavas, "On the sensitivity of a suboptimum precoding scheme for frequency-selective block based channel with respect to channel inaccuracies," IEEE Trans. Information Theory, vol 51, no. 9, pp. 3374-3381, September 2005.(pdf)
  11. A. P. Liavas, "Tomlinson-Harashima precoding with partial channel knowledge," IEEE Trans. Communications, vol. 53, no 1, pp. 5-9, January 2005.(pdf)
  12. A. P. Liavas, "On the robustness of the finite-length MMSE-DFE with respect to channel and second-order statistics estimation errors," IEEE Trans. Signal Processing, vol. 50, no. 11, pp. 2866-2874, November 2002.(pdf)
  13. A. Beikos and A. P. Liavas, "Performance analysis and comparison of blind to non-blind least squares equalization with respect to effective channel overmodeling," Signal Processing, vol. 82, pp. 1233-1253, September 2002.(pdf)
  14. A. P. Liavas and P. A. Regalia, "On the behavior of information theoretic criteria for model order selection," IEEE Trans. Signal Processing, vol. 49, no. 8, pp. 1689-1695, August 2001.(pdf)
  15. J-P. Delmas, H. Gazzah, A. P. Liavas and P. A. Regalia, "Statistical analysis of some second order methods for blind channel identification/equalization with respect to channel undermodeling," IEEE Trans. Signal Processing, vol. 48, no. 7, pp. 1984-1998, July 2000.(pdf)
  16. A. P. Liavas, "Least-squares equalization performance versus equalization delay," IEEE Trans. Signal Processing, vol. 48, no. 6, pp. 1832-1835, June 2000.(pdf)
  17. A. P. Liavas, P. A. Regalia and J-P. Delmas, "On the robustness of the linear prediction method for blind channel identification with respect to effective channel undermodeling/overmodeling," IEEE Trans. Signal Processing, vol. 48, no. 5, pp. 1477-1481, May 2000.(pdf)
  18. A. P. Liavas, P. A. Regalia and J-P. Delmas, "Blind channel approximation: Effective channel length determination," IEEE Trans. Signal Processing, vol. 47, no. 12, pp. 3336-3344, December 1999.(pdf)
  19. A. P. Liavas, P. A. Regalia and J-P. Delmas,"Robustness of the least squares and subspace methods for blind channel identification-equalization with respect to effective channel undermodeling-overmodeling,"IEEE Trans. Signal Processing, vol. 47, no. 6, pp. 1636-1645, June 1999.(pdf)
  20. A. P. Liavas and P. A. Regalia, "On the numerical stability and accuracy of the conventional RLS algorithm," IEEE Trans. Signal Processing, vol. 47, no. 1, pp. 88-96, January 1999.(pdf)
  21. A. P. Liavas and P. A. Regalia, "Acoustic echo cancellation: Do IIR models offer better modelling capabilities than their FIR counterparts?," IEEE Trans. Signal Processing, vol. 46, no. 9, pp. 2499-2504, September 1998.(pdf)
  22. A. P. Liavas, G.V. Moustakides, G. Henning, E. Psarakis and P. Husar, "A Periodogram based method for the detection of Steady-State Visually Evoked Potentials," IEEE Trans. Biomedical Engineering, vol. 45, no. 2, pp. 242-248, February 1998.(pdf)
  23. A. P. Liavas and S. Theodoridis, "Efficient Levinson and Schur-type algorithms for block near-to-Toeplitz systems of equations," Signal Processing, vol. 35, pp. 241-255, 1994.
  24. S. Theodoridis and A. P. Liavas, "Highly concurrent algorithm for the solution of ?-Toeplitz system of equations," Signal Processing vol. 24, pp. 165-176, 1991.
Publications in conferences
  1. P. A. Karakasis and A. P. Liavas "Alternating Optimization for Tensor Factorization with Orthogonality Constraints: Algorithm and Parallel Implementation," International Conference on High Performance Computing & Simulation (HPCS), Orleans, July 2018 (pdf)
  2. G. Lourakis, A. P. Liavas "Nesterov-based Alternating Optimization for Nonnegative Tensor Completion: Algorithm and Parallel Implementation," Proc. IEEE 19th International Workshop on Signal Processing Αdvances in Wireless Communications (SPAWC), Kalamata, June 2018 (pdf)
  3. A. P. Liavas, G. Kostoulas, G. Lourakis, K. Huang, and N. D. Sidiropoulos, "Nesterov-based parallel algorithm for large-scale nonnegative tensor factorization," 2017 International Conference on Acoustics, Speech, and Signal Processing (ICASSP), New Orleans, March 2017.(pdf)
  4. K. Huang, N. D. Sidiropoulos, and A. P. Liavas, "Efficient algorithms for `universally' constrained matrix and tensor factorization," 23rd European Signal Processing Conference, EUSIPCO 2015, Sept. 2015.(pdf)
  5. A. P. Liavas and N. D. Sidiropoulos "Parallel Algorithms for Large Scale Constrained Tensor Decomposition," IEEE ICASSP 2015, Brisbane Australia.(pdf)
  6. A. P. Liavas and D. Tsipouridou "Single-Carrier systems with MMSE linear equalizers: performance degradation due to channel and CFO estimation errors," IEEE ICASSP 2011, Prague.(pdf)
  7. G. N. Karystinos and A. P. Liavas, "Efficient computation of the binary vector that maximizes a rank-deficient quadratic form," IEEE ICASSP 2008, Las Vegas.(pdf)
  8. G. N. Karystinos and A. P. Liavas,"Outage capacity of a cooperative sheme with bimary input and a simple relay," IEEE ICASSP 2008, Las Vegas.(pdf)
  9. D. Tsipouridou and A. P. Liavas, "On the robustness of the transmit Wiener filter with respect to channel estimation errors," IEEE ICASSP 2007, Hawaii.
  10. G. N. Karystinos and A. P. Liavas, "Efficient computation of the binary vector that maximizes a rank-3 quadratic form," in Proc. 2006 Allerton Conference on Communication, Control, and Computing, Allerton House, Monticello, IL Sept. 2006, pp. 1286-129
  11. A. P. Liavas, "Sensitivity analysis of a suboptimal precoding scheme for block channels with respect to channel inaccuracies," IEEE ICASSP, March 2005.
  12. A. P. Liavas, "Robustness of the finite-length MMSE-DFE with respect to channel and second- order statistics estimation errors," Proc. EUSIPCO, Toulouse, August 2002.
  13. A. P. Liavas, "On the robustness of the finite-length MMSE-DFE with respect to channel and second-order statistics estimation errors," Proc. IEEE Workshop on Statistical Signal Processing, Singapore, August 2001.
  14. J-P. Delmas, H. Gazzah and A. P. Liavas, "Statistical analysis of second-order statistics methods for blind channel identification," Proc. First Int. Conf. on Mathematics for Signal Processing, London, December 1998.
  15. A. P. Liavas, P. A. Regalia and J-P. Delmas, "Blind channel approximation: Effective channel length determination," Proc. Asilomar Conf. on Signals, Systems and Computers, Pacific- Grove, CA, November 1998.
  16. A. P. Liavas, P. A. Regalia and J-P. Delmas, "Robustness of least-squares and subspace methods for blind channel identification/equalization algorithms with respect to channel un dermodeling," Proc. EUSIPCO, Rodos, September 1998.
  17. A. P. Liavas and P. A. Regalia, "Numerical accuracy issues of recursive least squares algo rithms," Proc. IEEE Int. Conf. Acoustics, Speech and Signal Processing 1998, Seattle, May 1998.
  18. A. P. Liavas and P. A. Regalia, "Performance Assesments of IIR and FIR models for Acoustic Echo Cancellation," Proc. Inter. Workshop on Acoustic Echo and Noise Control, London, Sept. 1997.
  19. A. P. Liavas, G. V. Moustakides, G. Henning, E. Psarakis and P. Husar, "On the detection of Steady-State Visually Evoked Potentials," Proc. IEEE Int. Conf. Biomedical Eng., Amsterdam, November 1996.
  20. A. P. Liavas and S. Theodoridis, "Novel Schur-type algorithm for near-to-Toeplitz linear systems with multichannel entries," Proc. EUSIPCO, Brussels, August 1992, pp. 879-882.
  21. A. P. Liavas and S. Theodoridis, "Efficient Levinson-type algorithm for block ρ -Toeplitz system solution," Proc. IEEE Int. Conference Acoustics, Speech and Signal Processing, Toronto, May 1991. pp. 2265-2268.
Technical Reports
  1. A. P. Liavas and D. Tsipouridou "Single-Carrier systems with MMSE linear equalizers: performance degradation due to channel and CFO estimation errors," Technical report, June 2011.(pdf)

Teaching
Seminars

Projects
Students
  Despoina Tsipouridou PhD Student
  Alex Balatsoukas- Stimming Graduate Student