Publications in Journals and Book Chapters

  1. P. Bouboulis, S. Theodoridis, L.Dala "Complex Support Vector Machines for Regression and Quaternary Classification'', IEEE Transactions on Neural Networks, to appear 2014.
  2. S. Theodoridsis, Y. Kopsinis, K. Slavakis "Sparsity-Aware Learning and Compressed Sensing: An Overview", Academic Press Library in Signal Processing, Academic Press, 2104.
  3. K. Slavakis, P. Bouboulis, S. Theodoridis "Online Learning in Reproducing Kernel Spaces," Academic Press Library in Signal Processing, Academic Press, 2014.
  4. S. Chouvardas, K. Slavakis, S. Theodoridis "Trading off complexity with communication costs in distributed adaptive learning via Krylov subsapces for dimensionality reduction",IEEE Journal of Selected Topics in Signal Processing, Vol. 7(2), pp. 257-274, 2013.
  5. K. Slavakis, Y. Kopsinis, S. Sheodoridis, S. McLaughlin "Generalized thresholding and online sparsity-aware learning in a union of subspaces,'' IEEE Transactions on Signal Processing, Vol.61(15), pp. 3760-3773, 2013.
  6. S. Chouvardas, K. Slavakis, S. Theodoridis, I. Yamada "Stochastic analysis of hyperslab-based adaptive projected subgradients method under bounded noise," IEEE Signal Processing Letters, pp. 729-732, 2013.
  7. E. Kofidis, D. Katselis, A.A. Rontogiannis, S. Theodoridis, "Preamble-Based Channel Estimation in OFDM/OQAM Systems: A Review", Signal Processing, Elsevier, vol. 93, pp. 2038-2054, 2013.
  8. P. Bouboulis, S. Theodoridis, M. Mavroforakis "The augmented complex kernel LMS", IEEE Transactions on Signal Processing, Vol 60(9), pp. 4962-4967, 2012.
  9. S. Chouvardas, K. Slavakis, Y. Kopsinis, S. Theodoridis "A Sparsity promoting adaptive algorithm for distributed learning," IEEE Transactions on Signal Processing, Vol. 60(10). pp. 5412-5425, 2012.
  10. K. Slavakis, P. Bouboulis, S. Theodoridis "Nonlinear multivariable regression: The MIMO channel equalization case", IEEE Transactions on Neural Networks and Learning Systems, Vol. 23(2), pp. 260-276, 2012.
  11. P. Bouboulis, K. Slavakis, S. Theodoridis "Adaptive Learning in Complex Reproducing Kernel Hilbert Spaces employing Wirtinger's subgradients", IEEE Transactions on Neural Networks and Learning Systems, Vol. 23(3), pp. 425-438, 2012.
  12. K. Rizogiannis, E. Kofidis, A. Rondogiannis, S. Theodoridis "Adaptive BLAST-type Decision-Feedback Equalizers for DS-CDMA Systems," Signal Processing, vol. 92, pp. 977-988, 2012.
  13. A. Makris, D. Kosmopoulos, S. Perantonis, S. Theodoridis "A hierarchical feature fusion framework for adaptive visual tracking", Image and Vision Computing, Elsevier, 2011.
  14. S. Chouvardas, K. Slavakis, S. Theodoridis "Adaptive Robust Distributed Learning in Diffusion Sensor Networks", IEEE Transactions on Signal Processing, Vol. 59(10), pp. 4692-4708, 2011.
  15. P. Bouboulis, S. Theodoridis "Extension of Wirtinger Calculus to Reproducing Kernel Hilbert Spaces and the complex kernel LMS", IEEE Transactions on Signal Processing, Vol. 59(3), pp. 964-978, 2011.
  16. Y. Kopsinis, K. Slavakis, S. Theodoridis "On line sparse system identification and signal reconstruction using projections onto weighted l1 balls", IEEE Transactions on Signal Processing, Vol. 59(3), pp. 936-952, 2011.
  17. S. Theodoridis, K. Slavakis, I. Yamada, "Adaptive learning in a world of projections: A unified framework for linear and nonlinear regression and classification tasks", IEEE Signal Processing Magazine, Vol. 28(1), pp. 97-123, 2011. (number six in the list of top downloaded papers in January 2011, IEEE SP Magazine).
  18. S. Tzikopoulos, M. Mavroforakis, H. Georgiou, N. Dimitropoulos, and S. Theodoridis "A fully automated scheme for mammographic segmentation and classification based on breast density and asymmetry", Computer Methods and Programs in Biomedicine, V.102(1), pp. 47-63, 2011.
  19. P. Bouboulis, K. Slavakis, S. Theodoridis, "Adaptive Kernel-based Image Denoising employing Semi-Parametric Regularization", IEEE Transactions on Image Processing, Vol. 19(6), pp. 1465-1480, 2010. (number two in the list of top downloaded papers in June 2010 in IEEE Trans. IP).
  20. D. Katselis, E. Kofidis, T. Rontogiannis, S. Theodoridis "Preamble-based channel estimation for C_-OFDM and OFDM\OQAM systems," IEEE Trans. On Signal Processing, Vol. 58(5), pp. 2911-2916, 2010.
  21. C. Rizogiannis, E. Kofidis, C. Papadias, S. Theodoridis, "Semi-blind maximum-likelihood joint channel/data estimation for correlated channels in multiuser MIMO networks", Signal Processing, Vol. 90, pp.1209-1224, 2010.
  22. K. Slavakis, S. Theodoridis, I Yamada, "Adaptive constrained learning in reproducing kernel Hilbert spaces", IEEE Transactions on Signal Processing, pp. 4744-4764, Vol 57(12), 2009.
  23. A. Rontogiannis, S. Theodoridis, "Housholder-Based RLS Algorithms", in QRD-RLS Adaptive Filtering, J.A. Apolonario Jr., Springer 2009.
  24. J. Vandewalle, L. Trajkovic, S. Theodoridis, "Introduction and outline of the special issue on circuits and systems education: experiences, challenges, and views," IEEE Circuits and Systems Magazine, Vol. 9(1), pp. 27-33, 2009.
  25. A. Pikrakis, T. Giannakopoulos, S. Theodoridis, "An Overview of Speech/Music Discrimination Techniques in the Context of Audio Recordings", in G. Tsihrintzis and L. Jain (Eds.) "Multimedia Services in Intelligent Environments - Advanced Tools and Methodologies", book series "Studies in Computational Intelligence", Volume 120, pp. 81-102, 2008, Publisher: Springer Berlin / Heidelberg, ISBN: 978-3-540-78491-3.
  26. D. Delviniotis, G. Kouroupetroglou, and S. Theodoridis, "Acoustic Analysis of musical intervals in modern Byzantine Chant Scales", Journal of the Acoustical Society of America (JASA), Vol. 124(4), pp. EL262-EL269, 2008.
  27. D. Katselis, L. Kofidis, S. Theodoridis, "On Training Optimization for Estimation of Correlated MIMO Channels in the Presence of Multiuser Interference", IEEE Transactions on Signal Processing, Vol. 56(10), pp. 4892-4904, 2008.
  28. S. Theodoridis et. al "Design and characterization of the I-ImaS multi-element x-ray detector system", IEEE Transactions on Nuclear Science, Vol. 55(3), pp. 827-832, 2008.
  29. S. Theodoridis, et.al. "Preliminary images from an adaptive imaging system", Physica Medica., Vol. 24(3), pp. 117-121, 2008.
  30. K. Slavakis, S. Theodoridis "Sliding Window Generalized Kernel Affine Projection Algorithm using Projection Mappings", Special Issue on Emerging Machine Learning Techniques in Signal Processing, EURASIP Journal on Advances in Signal Processing, vol. 2008, Article ID 830381, 2008. doi:10.1155/2008/830381.
  31. A. Pikrakis, T. Giannakopoulos, S. Theodoridis "A speech-music discrimination framework for radio broadcasts", IEEE Transactions on Multimedia, Vol. 10(5), pp.846-858, 2008.
  32. K. Slavakis, S. Theodoridis, I. Yamada "Online classification using kernels and projection-based adaptive algorithms", IEEE Transactions on Signal Processing, Vol. 56(7), pp. 2781-2797, 2008.
  33. A. Pikrakis, T. Giannakopoulos, S. Theodoridis, "An overview of speech/music discrimination techniques in the context of audio recordings", Studies in Computational Intelligence, Volume 120, Pages 81-102, Springer Verlag (ISSN 1860-949X), 2008.
  34. I. Antonopoulos, A. Pikrakis, S. Theodoridis, "Self-Similarity Analysis Applied on Tempo Induction from Music Recordings", Journal of New Music Research, Special Issue on Tempo Tracking, Vol. 36(1), pp. 27 – 38, 2007.
  35. Konidaris, B. Gatos, K. Ntzios, I. Pratikakis, S. Theodoridis and S. J. Perantonis, "Keyword-Guided Word Spotting in Historical Printed Documents Using Synthetic Data and User feedback", International Journal on Document Analysis and Recognition (IJDAR), Special Issue on Historical Documents, Vol. 9, No. 2-4, pp. 167-177, 2007.
  36. H. Georgiou, M. Mavroforakis, N. Dimitropoulos, D. Cavouras, S. Theodoridis "Multi-scaled morphological features for the characterization of mammographic masses using statistical classification schemes", Artificial Intelligence in Medicine, Vol. 41, pp. 39-55, 2007.
  37. M. Mavroforakis, M. Sdralis, S. Theodoridis "A geometric nearest point algorithm for the efficient solution of the SVM classification task", IEEE Transactions on Neural Networks, Vol. 18(5), pp. 1545-1550, 2007.
  38. D. Katselis, E. Kofidis, S. Theodoridis "Estimation of correlated MIMO fading channels in interference-limited environments", Signal Processing, Vol. 87(9), pp. 2177-2197, 2007.
  39. S. Theodorids, M Mavroforakis "Reduced convex hulls: a geometric approach to support vector machines," IEEE Signal Processing Magazine, Vol. 24(3), pp. 119-122, May 2007.
  40. A. Fant, P. Gasiorek, R. Turchetta, B. Avset, A. Bergamaschi, D. Cavouras, I. Evangelou, M.J. French, A. Galbiati, H. Georgiou, G. Hall, G. Iles, J. Jones, R. Longo, N. Manthos, M.G. Metaxas, M. Noy, J.M. Ostby, F. Psomadellis, G.J. Royle, H. Schulerud, R.D. Speller, P.F. van der Stelt, S. Theodoridis, F. Triantis, C. Venanzi "I-IMAS: A 1.5D sensor for high-resolution scanning", Nucl. Instr. Meth. Res. A, Vol. 573, pp. 27-29, 2007.
  41. S. Theodoridis, et. al. "CMOS Monolithic Active Pixel Sensors", Nucl. Instrum. Meth. Res. A, Vol. 582(3), pp. 866-870, 2007.
  42. V. Drakopoulos, P. Bouboulis, S. Theodoridis "Image compression using affine fractal interpolation on rectangular lattices", FRACTALS, Vol. 14(4), pp. 259-269, December 2006.
  43. Y. Kopsinis, S. Theodoridis, E. Kofidis, "An efficient low complexity cluster-based MLSE equalizer for frequency-selective fading channels", IEEE Trans. on Wireless Communications, Vol. 5(4), pp. 705-712, 2006.
  44. E. Kofidis, Y. Kopsinis, S. Theodoridis, "On the least Squares Performance of a Novel Efficient Center Estimation Method for Clustering-Based MLSE Equalization", IEEE Trans. on Signal Processing, Vol. 54(4), pp. 1459-1472, 2006.
  45. A. Pikrakis, S. Theodoridis, D. Kamarotos "Recognition of musical patterns using hidden Markov models", IEEE Transactions on Audio, Speech and Language Processing, Vol.14(5), pp. 1795-1807, 2006.
  46. M. Mavroforakis, S. Theodoridis "A geometric approach to support vector machine (SVM) classification, IEEE Trans. on Neural Networks, Vol. 17(3), pp.671-683, 2006. (2009 Outstanding paper award of the IEEE Transactions on Neural networks).
  47. E. Kofidis, V. Dalakas, Y. Kopsinis, S. Theodoridis, "A Novel Efficient Cluster-Based MLSE Equalizer for Satellite Communication Channels with M-QAM Signaling," EURASIP Journal on Applied Signal Processing, vol. 2006, Article ID 34343, 2006.
  48. M. Mavroforakis, H Georgiou, N. Dimitropoulos, D. Cavouras, S. Theodoridis "Mammographic masses characterization based on localized texture and data set fractal analysis using linear, neural and support vector machine classifiers," Artificial Intelligence in Medicine, Vol. 37, pp. 145-162, 2006.
  49. G Li, PF Van der Stelt, JGC Verheij, R Speller, A Galbiati, F Psomadellis, R Turchetta, S Theodoridis, G Hall, BS Avset, FA Triantis, R Longo "End-user survey for digital sensor characteristics: a pilot questionnaire study", Dentomaxillofacial Radiology, Vol. 35, 147-151, 2006.
  50. M. Mavroforakis, H Georgiou, N. Dimitropoulos, D. Cavouras, S. Theodoridis "Significance analysis of qualitative mammographic features, using linear classifiers, neural networks and support vector machines'', European Journal of Radiology, Vol. 54, pp. 80-89, 2005.
  51. Y. Kopsinis, S. Theodoridis "A novel clustered based MLSE equalizer for M-PAM signaling schemes", Signal Processing, Vol. 83, pp. 1905-1918, 2003.
  52. Y. Kopsinis, S. Theodoridis "Novel MLSE techniques for linear and nonlinear equalizers", IEEE Trans. on Signal Processing, Vol. 12(51), pp. 3236-3249, 2003.
  53. A. Pikrakis, S. Theodoridis, D. Kamarotos "Recognition of musical patterns using dynamic time warping techniques ", IEEE Trans. on Speech and Audio Processing, Vol. 11, pp. 175-184, 2003.
  54. S. Theodoridis "Pattern Recognition", Encyclopedia of Information Sciences, Academic Press, 2002.
  55. V. Gezerlis, S. Theodoridis "Optical Character Recognition of the Orthodox Hellenic Byzantine music notation", Pattern Recognition, Vol. 35, pp. 895-914, 2002.
  56. S. Theodoridis, K. Koutroumbas, "Pattern Recognition and Neural Networks", in Machine Learning and its Applications, (eds) G. Paliouras, V. Karkaletsis, C.D. Spyropoulos, LNAI 2049, Springer, pp. 169 -195, 2001.
  57. C. Georgoulakis, S. Theodoridis "Blind and semi-blind equalization using hidden Markov models and clustering techniques", Signal Processing, Invited paper, Special issue on current topics in adaptive filtering for hands free acoustic communication and beyond, Vol.80(9), pp. 1795-1807, Sept. 2000.
  58. E. Kofidis, N. Kolokotronis, A. Vassilarakou, S. Theodoridis, D. Cavouras "Medical image compression", Future Generation Computer Systems, Vol. 15, pp. 223-243, 1999.
  59. G. Glentis, K. Berberidis, S. Theodoridis "Efficient Least Squares Adaptive Algorithms for FIR Transversal Filtering", IEEE Signal Processing Magazine, Vol. 16(4), pp. 13-42, July 1999.
  60. C. Georgoulakis, S. Theodoridis "Channel Equalization for Coded Signals in Hostile Environments", IEEE Trans. on SP, vol. 47(6), pp. 1783-1788, June 1999.
  61. K. Berberidis, S. Theodoridis "A new fast block adaptive algorithm " IEEE Trans. on SP, Vol. 47, pp. 75-87, Jan. 1999.
  62. A. Rontogiannis, S. Theodoridis "New QRD LS algorithms for multichannel filtering", IEEE Trans. on SP., Vol. 46(11), pp. 2862-2877, Nov. 1998.
  63. A. Rontogiannis, S.Theodoridis, "New fast QRD LS adaptive algorithms", IEEE Trans. on SP, Vol. 46(8), pp. 2113-2122, Aug. 1998.
  64. K. Berberidis, A. Rontogiannis, S. Theodoridis "Block implementation of the LMS based decision feedback equalizers", IEEE SP Letters, Vol.5, pp. 129-132, June 1998.
  65. E. Kofidis, S. Theodoridis, N. Kalouptsidis "Mirror-image symmetric perfect reconstruction FIR filter banks: Parameterization and design", Signal Processing, Vol. 68, pp. 1-21, 1998.
  66. A. Rontogiannis, S. Theodoridis, "On inverse factorization adaptive LS algorithms", Signal Processing, Vol. 52, pp. 35-47, 1997.
  67. C. Georgoulakis, S. Theodoridis "Efficient clustering techniques for supervised and blind equalization in hostile environments", Signal Processing, vol. 58, pp. 153-164, 1997.
  68. E. Kofidis, S. Theodoridis, N. Kalouptsidis, "On the perfect reconstruction problem in N-band multirate maximally decimated FIR filter banks", IEEE Trans. on Signal Processing, Oct. 1996.
  69. E. Kofidis, S. Theodoridis, C. Kotropoulos, I. Pitas, "Nonlinear adaptive filters for speckle noise suppression in ultrasonic images", Signal Processing, Vol. 52, pp. 357-372, 1996.
  70. S. Theodoridis, G. Moustakides, K. Berberidis, "A new class of algorithms for Decision feedback equalization", IEEE Trans. SP-43, pp. 327-331, Jan. 1995.
  71. S. Theodoridis, C. Cowan, C. Callender, "Schemes for equalization of digital communications channels", IEE Proceedings on Communications, Vol. 142, pp. 165-171, Jun. 1995.
  72. C. Callender, S. Theodoridis, C. Cowan, "Adaptive nonlinear equalization of digital communications channels", Signal Processing, vol. 40, pp. 325-333, 1994.
  73. S. Nikolaidis, S. Theodoridis, C. Goutis, "Array Processor for block adaptive LS FIR Filtering", Signal Processing, Vol. 39, pp. 215-222, 1994.
  74. T. Petillon, A. Gilloire, S. Theodoridis, "Fast Newton Transversal Filters: An efficient way for echo cancellation in mobile radio communications", IEEE Trans., Vol. SP-42, April 1994.
  75. A. Liavas, S. Theodoridis, "Efficient Levinson and Schur type algorithms for block ¨-Toeplitz systems of equations", Signal Processing, Vol.35, 1994.
  76. S. Theodoridis, N. Kalouptsidis, "Spectral Analysis",in Adaptive System Identification and Signal processing algorithms, N. Kalouptsidis, S. Theodoridis (eds), Prentice Hall 1993.
  77. N. Kalouptsidis, S. Theodoridis, "System Identification: Basic concepts and Algorithmic schemes", in Adaptive System Identification and Signal processing algorithms, N. Kalouptsidis, S. Theodoridis (eds), Prentice Hall 1993.
  78. K. Berberidis, S. Theodoridis, "Efficient Symmetric algorithms for the modified Covariance method for AR spectral analysis", IEEE Trans., Vol. SP 34, pp. 43-55, Jan. 1993.
  79. G. Moustakides, S. Theodoridis, "Fast Newton Transversal Filters. A new class of estimation algorithms", IEEE Trans., Vol. ASSP-39, pp. 2184-2194, Oct. 1991.
  80. S. Theodoridis, A. Liavas, "Highly concurrent algorithm for the solution of ρ-Toeplitz system of equations", Signal Processing, Vol. 24, pp. 165-176, 1991.
  81. A. Varvitsiotis, S. Theodoridis, "A pipeline structure for QR adaptive LS system identification", IEEE Trans., Vol.-39, pp.1920-1924, Aug. 1991.
  82. K. Berberidis, S. Theodoridis, "Levinson, Lattice and Schur type algorithms for linear phase filtering", IEEE Trans., Vol. ASSP-38, pp.1879-1893, nov. 1990.
  83. S. Theodoridis, K. Berberidis, "Adaptive LS internally symmetric algorithms for linear phase filtering", in "Algorithms and VLSI Architectures", ed. E. Deprettere, North holland, 1990.
  84. K. Berberidis, S. Theodoridis, "A normalized lattice algorithm for ΑR spectral analysis and system identification with symmetric impulse response", IEEE Trans., Vol. ASSP-38, pp.397-406, March 1990.
  85. S. Theodoridis, "Pipelined structure for LS block adaptive filtering prediction", IEEE Trans., Vol. ASSP-38, pp.81-91, Jan. 1990.
  86. S. Theodoridis, N. Kalouptsidis, D. Bakirtzis, "Pipelined algorithms for LS FIR filters with symmetric impulse response", IEEE Trans., Vol. ASSP-38, pp. 260-271, Feb. 1990.
  87. N. Kalouptsidis, S. Thedoridis, "Concurrent algorithms for a class of 1 and 2-D Wiener filters with symmetric impulse response", IEEE Trans., Vol. ASSP-37, pp.1780-1782, Nov. 1989.
  88. S. Theodoridis, N. Kalouptsidis, K. Berberidis, "A new adaptive covariance symmetric algorithm and a fast initializaton scheme for LS FIR filters with symmetric impulse response", Signal Processing, Vol. 18, pp. 153-167, 1989.
  89. S. Theodoridis, N. Kalouptsidis, J. Proakis, G. Koyas, "Interference rejection in PN spread spectrum systems with LS FIR filters with linear phase", IEEE Trans., Vol. Com-37, pp. 991-995, Sept. 1989.
  90. N. Kalouptsidis, S. Theodoridis, "Efficient structurally symmetric algorithms for Least Squares FIR filters with linear phase", IEEE Trans., Vol. ASSP-36, pp. 1454-1465, Sept. 1989.
  91. N. Kalouptsidis, S. Theodoridis, "Fast sequential algorithms for FIR filters with linear phase", IEEE Trans., Vol. CAS-35, pp. 425-433, April 1988.
  92. N. Kalouptsidis, S. Theodoridis, "Parallel implementation of efficient LS algorithms for filtering and prediction", IEEE Trans., Vol. ASSP-35, pp.1565-1569, Nov.1987.
  93. S. Theodoridis, N. Kalouptsidis, "A fast algorithm for block LS design of FIR filters with linear phase and optimum lag", IEEE Trans., Vol. ASSP-35, July 1987.
  94. N. Kalouptsidis, S. Theodoridis, "Fast adaptive Least Squares algorithms for power spectral estimation", IEEE Trans., Vol. ASSP-35, May 1987.
  95. P.E Dexter, S. Theodoridis, "Skywave measurements of wind vectors and wave spectra", in "Advances in modern Oceanography", Eds. Phillips, Hasselman, Plenum Press, 1984.
  96. E. N Bramley, P.A Bradley, E.D.R. Shearman, W. A. Sandham, S. Theodoridis, "Sky-wave radar sea state sensing. Effects of ionospheric movement and propagation geometry", Intl. Journal of Remote Sensing, Vol. 3, No.4, pp. 373-382, 1982.
  97. P.E Dexter, S. Theodoridis, "Surface wind speed extraction from HF sky wave radar Doppler Spectra", Radio Science, Vol.17, May-June 1982, pp.643-652.
  98. S. Theodoridis, D.C Cooper, "Application of the Maximum Entropy Spectrum analysis technique to signals with spectral peaks of finite width", Signal Processing, Vol. 3, No. 2, April 1981, pp. 109-122.
  99. S. Theodoridis, D.C Cooper, "On the resolutions properties of an adaptive algorithm for Maximum Entropy Spectrum analysis", Signal Processing, Vol.2, No. 4, Oct. 1980, pp.397-400.
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