Book Chapters

  1. P.V Giampouras, K.E. Themelis, A.A. Rontogiannis, K.D. Koutroumbas, “Structured Abundance Matrix Estimation for Land Cover Hyperspectral Image Unmixing”, Chapter in book: Compressive Sensing of Earth Observations, C.H. Chen (Editor), CRC Press Signal and Image Processing of Earth Observations Book Series, 2017.

  2. A.A. Rontogiannis, S. Theodoridis, “Householder-Based RLS Algorithms”, Chapter in book: QRD-RLS Adaptive Filtering, J. Apolinario (Editor), Springer Verlag, 2009.

  3. A.A. Rontogiannis, M. Alvarez-Dvaz, M. Casadei, V. Dalakas, A. Duverdier, F.-J. Gonzalez-Serrano, M. Iubatti, T. Javornik, L. Lapierre, M. Neri, P. Salmi, “Distortion Countermeasures”, Chapter in book: Digital Satellite Communications, G.E. Corazza (Editor), Springer Verlag, 2007.

Journal papers

  1. P.V. Giampouras, A.A. Rontogiannis, E. Kofidis, “Block-Term Tensor Decomposition Model Selection and Computation: The Bayesian Way,” IEEE Transactions on Signal Processing, vol. 70, pp. 1704-1717, 15 March 2022. (pdf)

  2. A.A. Rontogiannis, E. Kofidis, P.V. Giampouras, “Block-Term Tensor Decomposition: Model Selection and Computation,” IEEE Journal of Selected Topics in Signal Processing, Special Issue on Tensor Decomposition for Signal Processing and Machine Learning, vol. 15, no. 3, pp. 464-475, April 2021. (pdf)

  3. A.A. Rontogiannis, P.V. Giampouras,  K.D. Koutroumbas, “Online Reweighted Least Squares Robust PCA,” IEEE Signal Processing Letters, vol. 27, no. 7, pp. 1340-1344, July 2020. (pdf)

  4. P.V. Giampouras, A.A. Rontogiannis, K.D. Koutroumbas, “Alternating Iteratively Reweighted Least Squares Minimization for Low-Rank Matrix Factorization,” IEEE Transactions on Signal Processing, vol. 67, no. 2, pp. 490-503, Jan. 15  2019. (pdf)

  5. I.C. Tsaknakis, P.V. Giampouras, A.A. Rontogiannis, K.D. Koutroumbas, “A Computationally Efficient Tensor Completion Algorithm,” IEEE Signal Processing Letters, vol. 25, no. 8, pp. 1266-1270, Aug. 2018. (pdf)

  6. K.D. Koutroumbas, S.D. Xenaki, A.A. Rontogiannis, “On the Convergence of the Sparse Possiblistic c-Means Algorithm,” IEEE Transactions on Fuzzy Systems, vol. 26, no. 1, pp. 324-337, Feb. 2018. (pdf)

  7. P.V. Giampouras, A.A. Rontogiannis, K.E. Themelis, K.D. Koutroumbas, “Online Sparse and Low-Rank Subspace Learning from Incomplete Data: A Bayesian View,” Signal Processing, vol. 137, pp. 199-212, Aug. 2017. (pdf)

  8.  E.A. Mylona, O.A. Sykioti,  K.D. Koutroumbas, A.A. Rontogiannis,  “Spectral Unmixing-Based Clustering of High Spatial Resolution Hyperspectral Imagery,” IEEE Journal on Selected Topics in Applied Earth Observations and Remote Sensing, vol 10, no. 8, pp. 3711-3721, Aug. 2017. (pdf)

  9. C. Tsinos, A.A. Rontogiannis, K. Berberidis, “Distributed Blind Hyperspectral Unmixing via Joint Sparsity and Low-Rank Constrained Nonnegative Matrix Factorization”, IEEE Transactions on Computational Imaging, Special Issue on Computational Imaging for Earth Sciences, vol.3, issue 2, pp. 160-174, June 2017. (pdf)

  10. S.D. Xenaki, K.D. Koutroumbas, A.A. Rontogiannis, “Sparsity-Aware Possibilistic Clustering Algorithms”, IEEE Transactions on Fuzzy Systems, vol. 24, issue 6, pp. 1611-1626, Dec. 2016.(pdf)

  11. P. Bithas, A.A. Rontogiannis, "User Selection Scheme with Limited Feedback Processing and Outdated CSI in Multiuser Relay Networks", Wireless Communications and Mobile Computing, vol. 16, issue 16, pp. 2700-2713. Nov. 2016. (pdf)

  12. P.V. Giampouras, K.E. Themelis, A.A. Rontogiannis, K.D. Koutroumbas, "Simoultaneously Sparse and Low-Rank Abundance Matrix Estimation for Hyperspectral Image Unmixing", IEEE Transactions on Geoscience and Remote Sensing, vol. 54, issue.8, pp. 4775-4789,  Aug. 2016. (pdf)

  13. S.D. Xenaki, K.D. Koutroumbas, A.A. Rontogiannis, “A Novel Adaptive Possibilistic Clustering Algorithm”, IEEE Transactions on Fuzzy Systems, vol. 24, issue 4, pp. 791-810, Aug. 2016.(pdf)

  14. K.E. Themelis, A.A. Rontogiannis, K.D. Koutroumbas, "Variational Bayes Group Sparse Time-Adaptive Parameter Estimation with either Known or Unknown Sparsity Pattern", IEEE Transactions on Signal Processing, vol. 12 , no. 64, pp. 3194-3206, June 15 2016. (pdf)

  15. P. Bithas, A.A. Rontogiannis, G. Karagiannidis, “An Improved Threshold-based Channel Selection Scheme for Wireless Communication Systems”, IEEE Transactions on Wireless Communications, vol. 15, no. 2, pp. 1531-1546, Feb. 2016.(pdf)

  16. P.Bithas, A.A. Rontogiannis, "Mobile Communication Systems in the Presence of Fading/Shadowing, Noise and Interference", IEEE Transactions on Communications, vol. 63, issue 3, pp. 724-737, March 2015. (pdf)

  17. K.E. Themelis, A.A. Rontogiannis, K.D. Koutroumbas, “A Variational Bayes Framework for Sparse Adaptive Estimation”, IEEE Transactions on Signal Processing, vol. 62, no. 18, pp. 4723-4736, Sept. 2014. (pdf)

  18. C. Mavrokefalifis, E. Kofidis, A.A. Rontogiannis, S. Theodoridis, “Preamble-Based Channel Estimation in Single-Relay Networks Using FBMC/OQAM”, EURASIP Journal on Advances in Signal Processing 2014, 2014:66. (pdf)

  19. 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. (pdf)

  20. K.E. Themelis, F. Schmidt, O. Sykioti, A.A. Rontogiannis, K. Koutroumbas, I. Daglis, “On the Unmixing of MeX/OMEGA Hyperspectral Data”, Planetary and Space Science, Elsevier, vol. 68, issue 1, pp.34-41,  Aug. 2012. (pdf)

  21. C. Rizogiannis, E. Kofidis, A.A. Rontogiannis, S. Theodoridis, “Adaptive BLAST-type Decision Feedback Equalizers for CDMA Systems”, Signal Processing, Elsevier,  vol. 92, issue 4, pp. 977-988, April 2012. (pdf)

  22. K.E. Themelis, A.A. Rontogiannis, K.D. Koutroumbas, “A Novel Hierarchical Bayesian Approach for Sparse Semi-Supervised Hyperspectral Unmixing”, IEEE Transactions on Signal Processing, vol. 60, n0. 2, pp. 585-599, Feb. 2012. (pdf)

  23. G.A. Ropokis, A.A. Rontogiannis, K. Berberidis, “BER Performance Analysis of Cooperative DaF Relay Networks and a New Optimal DaF Strategy”, IEEE Transactions on Wireless Communications, vol. 4, no. 10, pp. 1044-1049, April 2011. (pdf)

  24. G. Ropokis, A.A. Rontogiannis, P.T. Mathiopoulos, K. Berberidis “An Exact Performance Analysis of MRC/OSTBC over Generalized Fading Channels”, IEEE Transactions on Communications, vol. 58, no. 9, pp. 2486-2492, Sept. 2010. (pdf)

  25. A. Lalos, A.A. Rontogiannis, K. Berberidis, “Frequency Domain Channel Estimation for Cooperative Communication Networks”, IEEE Transactions on Signal Processing, vol. 58, no. 6, pp. 3400-3405, June 2010. (pdf)

  26. D. Katselis, E. Kofidis, A.A. Rontogiannis, S. Theodoridis, “Preamble-Based Channel Estimation for CP-OFDM and OFDM/OQAM: A Comparative Study”, IEEE Transactions on Signal Processing,vol. 58, no. 5, pp. 2911-2916, May 2010. (pdf)

  27. V. Dalakas, A.A. Rontogiannis, P.T. Mathiopoulos, “A Time Domain Constellation Shaping Technique for PAPR Reduction”,  IET Communications, vol. 3, issue 7, pp. 1144-1152, July 2009.

  28. G. Ropokis, A.A. Rontogiannis, P.T. Mathiopoulos, “Quadratic Forms in Normal RVs: Theory and Applications to OSTBC over Hoyt Fading Channels”, IEEE Transactions on Wireless Communications, vol. 7, no. 12, pp. 5009-5019, Dec. 2008. (pdf)

  29. V. Kekatos, A.A. Rontogiannis, K. Berberidis, “Cholesky Factorization-Based Adaptive BLAST DFE for Wideband MIMO Channels”, EURASIP Journal on Advances in Signal Processing, Special Issue on Numerical Linear Algebra in Signal Processing Applications, vol. 2007, Article ID 45789, 11 pages, 2007. (pdf)

  30. A.A. Rontogiannis, V. Kekatos, K. Berberidis, “A Square-Root Adaptive V-BLAST Algorithm for Fast Time-Varying MIMO Channels”, IEEE Signal Processing Letters, vol. 13, no. 5, pp. 265-268, May 2006. (pdf)

  31. P.S. Bithas, N.S. Sagias, G.K. Karagiannidis, P.T. Mathiopoulos, A.A. Rontogiannis, “On the Performance Analysis of Digital Communications over Generalized-K Fading Channels”, IEEE Communications Letters, vol. 10, no. 5, pp. 353-355, May 2006. (pdf)

  32. V. Kekatos, A.A. Rontogiannis, K. Berberidis, “A Robust Parametric Technique for Multipath Channel Estimation in the Uplink of a DS-CDMA System”, EURASIP Journal on Wireless Communications and Networking, vol. 6, pp. 34-45, Mar. 2006. (pdf)

  33. A.A. Rontogiannis, K. Berberidis, A. Marava, J. Palicot, “Efficient Semi-Blind Estimation of Multipath Channel Parameters via a Delay Decoupling Optimization Approach”, Signal Processing, Elsevier, vol. 85, Issue 12, pp. 2394-2411, Dec. 2005. (pdf)

  34. A.A. Rontogiannis, K. Berberidis, “Bandwidth-Efficient Transmission Through Sparse Channels Using a Parametric Channel Estimation – based DFE”, IEE Proceedings-Communications, vol. 152, ιssue 2, pp. 251-257, April 2005. (pdf)

  35. A.A. Rontogiannis, K. Berberidis, “Efficient Decision Feedback Equalization for Sparse Wireless Channels”, IEEE Transactions on Wireless Communications, vol. 2, ιssue 3, pp. 570-581, May 2003. (pdf)

  36. A.A. Rontogiannis, S. Theodoridis, “Multichannel Fast QRD-LS Adaptive Filtering: New Technique and Algorithms”, IEEE Transactions on Signal Processing, vol. 46, no.11, pp.  2862-2877, Nov. 1998. (pdf)

  37. A.A. Rontogiannis, S. Theodoridis, “New Fast QR Decomposition Least Squares Adaptive Algorithms”, IEEE Transactions on Signal Processing, vol. 46, no. 8, pp. 2113-2122, Aug. 1998. (pdf)

  38. K. Berberidis, A.A. Rontogiannis, S. Theodoridis, “Efficient Block Implementation of the Decision Feedback Equalizer”, IEEE Signal Processing Letters, vol. 5, no. 6, pp. 129-132, June 1998. (pdf)

  39. Α.Α. Rontogiannis, S. Theodoridis, “On Inverse Factorization Adaptive Least Squares Algorithms”, Signal Processing, Elsevier, vol. 52, pp. 35-47, 1996. (pdf)

  40. A. Rontogiannis, N.J. Dimopoulos, “A Probabilistic Approach for Reducing the Search Cost in Binary Decision Trees”, IEEE Transactions On Systems, Man and Cybernetics, vol. 25, no. 2, pp. 362-370, Feb. 1995. (pdf)

Conference papers

  1. A.A. Rontogiannis, E. Kofidis, P.V. Giampouras,  “Online Rank-Revealing Block-Term Tensor  Decomposition,” In proceedings of the Asilomar Conference on Signals, Systems and Computers, Asilomar Grounds on Pacific Grove, CA,  Nov. 2021. (Invited paper) (pdf)

  2. P.V. Giampouras, A.A. Rontogiannis, E. Kofidis, “A Bayesian Approach to Block-Term Tensor Decomposition Model Selection and Computation,” In proceedings of the 29th European Signal Processing Conference, Dublin, Ireland, Aug. 2021. (pdf)

  3. A.A. Rontogiannis, P.V. Giampouras, E. Kofidis, “Rank-Revealing Block-Term Decomposition for Tensor Completion,” In proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Toronto, Canada, June 2021. (pdf)

  4. P.V. Giampouras, R. Vidal, A. Rontogiannis, B.D. Haeffele, “A Novel Variational Form of the Schatten-p Quasi-Norm,” In proceedings of the 34th Conference on Neural Information Processing Systems (NeurIPS) , Vancouver, Canada, Dec. 2020. (pdf), (supplementary)

  5. A.A. Rontogiannis, E. Kofidis, P.V. Giampouras, “Block-Term Tensor Decomposition: Model Selection and Computation,” In proceedings of the 28th European Signal Processing Conference (EUSIPCO), Amsterdam, The Netherlands, Aug. 2020, (held on Jan. 2021).  (pdf)

  6. P.V. Giampouras, A.A. Rontogiannis, K.D. Koutroumbas, “An IRLS Approach for Low-Rank Matrix Factorization,” In proceedings of the 7th Signal Processing with Adaptive Sparse Structured Representations (SPARS) Workshop, Toulouse, July 2019. (pdf)

  7. P.V. Giampouras, A.A. Rontogiannis, K.D. Koutroumbas, “A Projected Newton-type Algorithm for Nonnegative Matrix Factorization with Model Order Selection,”, In proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brighton, UK, May 2019. (pdf)

  8. P.V. Giampouras, A.A. Rontogiannis, K.D. Koutroumbas, "Robust PCA via Alternating Iteratively Reweighted Low-Rank Matrix Factorization," In proceedings of the IEEE International Conference on Image Processing, Athens, Oct. 2018. (pdf)

  9. S.D. Xenaki, K.D. Koutroumbas, A.A. Rontogiannis, "A Novel Online Possibilistic Clustering Algorithm for Big Data Processing," In proceedings of the 26th European Signal Processing Conference (EUSIPCO), Rome, Sept. 2018. (pdf)

  10. K.D. Koutroumbas, S.D. Xenaki, A.A. Rontogiannis, "Generalized Adaptive Possibilistic c-Means Clustering Algorithm" In proceedings of the 11th Hellenic Conference on Artificial Intelligence (SETN), Patras, July 2018. (pdf)

  11. P.V. Giampouras, A.A. Rontogiannis, K.D. Koutroumbas, "Low-Rank and Sparse NMF for Joint Endemembers Number Estimation and Blind Unmixing of Hyperspectral Images", In proceedings of the 25th European Signal Processing Conference (EUSIPCO), Kos Island, Aug. 2017.(pdf)

  12. P.V. Giampouras, A.A. Rontogiannis, K.D. Koutroumbas, "l2/l1 Regularized Non-Convex Low-Rank Matrix Factorization", In proceedings of the Signal Processing with Adaptive Sparse Structured Representations (SPARS) Workshop, Lisbon, June 2017.

  13. S.D. Xenaki, K.D. Koutroumbas, A.A. Rontogiannis, “Hyperspectral Image Clustering Using a Novel Efficient Online Possibilistic Algorithm”, In proceedings of the 24th European Signal Processing Conference (EUSIPCO), Budapest, Sept. 2016. (pdf)

  14. G.A. Ropokis, M.C. Filippou, A.A. Rontogiannis, L. DaSilva, N. Marchetti, V. Frascolla, P.T. Mathiopoulos, “Optimal Sensing and Power Allocation in Pilot-Aided Shared Access Systems:  A BER Minimization Approach”, In proceedings of the 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Edinburgh, July 2016.

  15. P.V. Giampouras, A.A. Rontogiannis, K.D. Koutroumbas, “Online Low-Rank Subspace Learning from Incomplete Data Using Rank Revealing l2/l1 Regularization”, In proceedings of the IEEE Statistical Signal Processing Workshop (SSP), Palma de Mallorca, June 2016. (pdf)

  16. K.D. Koutroumbas, S.D. Xenaki, A.A. Rontogiannis, “Detecting Hyperplane Clusters with Adaptive Possibilistic Clustering”, In proceedings of the 10th Hellenic Conference on Artificial Intelligence (SETN), Thessaloniki, May 2016.

  17. P.V. Giampouras, A.A. Rontogiannis, K.E. Themelis, K.D. Koutroumbas, “Online Bayesian Low-Rank Subspace Learning from Partial Observations”, In procedings of the 23th European Signal Processing Conference (EUSIPCO), Nice, Sept. 2015. (pdf)

  18. K.E. Themelis, A.A. Rontogiannis, K.D. Koutroumbas, “Online Bayesian Group Sparse Parameter Estimation Using a Generalized Inverse Gaussian Markov Chain”, In procedings of the 23th European Signal Processing Conference (EUSIPCO), Nice, Sept. 2015. (pdf)

  19. S.D. Xenaki, K.D. Koutroumbas, A.A. Rontogiannis, O. Sykioti, “A New Sparsity-Aware Feature Selection Method for Hyperspectral Image Clustering”, In procedings of the 36th IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Milan, July 2015.

  20. E. Mylona, O. Sykioti, K.D. Koutroumbas, A.A. Rontogiannis, “Joint Spectral Unmixing and Clustering for Identifying  Homogeneous Regions in Hyperspectral Images”, In proceedings of the 36th IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Milan, July 2015.

  21. P.V. Giampouras, A.A. Rontogiannis, K.D. Koutroumbas, K.E. Themelis, “A Sparse Reduced-Rank Regression Approach for Hyperspectral Image Unmixing”, In proceedings of the 3rd International Workshop on Compressive Sensing Theory and its Applications in Radar, Sonar and Remote Sensing (CoSeRa), Pisa, June 2015. (2nd Best Student Paper Award winning paper)(pdf)

  22. P. V. Giampouras, K.E. Themelis, A.A. Rontogiannis, K.D. Koutroumbas, “Hyperspectral Image Unmixing via Simultaneously Sparse and Low-Rank Adundance Matrix Estimation”, In proceedings of the 7th Workshop on Hyperspectral  Image and Signal Processing: Evolution in Remote Sensing (WHISPERS), Tokyo, June 2015.(pdf)

  23. P. Bithas, A.A. Rontogiannis, “Outage Probability Analysis for Multihop Cognitive Networks under Multiple Primary Users Interference”, In proceedings of European Wireless (EW), Budapest, May 2015.

  24. P. Bithas, A.A. Rontogiannis, K. Berberidis, "SINR Analysis of Cognitive Underlay Systems with Multiple Primary Transceivers in Nakagami-m Fading", In proceedings of the 10th IEEE International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), Larnaca, Oct. 2014. (pdf)

  25. P. Bithas, A.A. Rontogiannis, “Analysis of Threshold-Based Selection Diversity Receivers”, In proceedings of the 80th IEEE Vehicular Technology Conference, (VTC Fall), Vancouver, Sept. 2014. (pdf)

  26. K. Themelis, A.A. Rontogiannis, K. Koutroumbas, “Group-Sparse Adaptive Variational Bayes Estimation”, In proceedings of the 22th European Signal Processing Conference (EUSIPCO), Lisbon, Sept. 2014. (pdf)

  27. P. Bithas, A.A. Rontogiannis, “Performance Analysis of Cooperative Networks in Shadowed Fading with Co-Channel Interference”, In proceedings of the IEEE 25th International Symposium on Personal, Indoor, Mobile Radio Communications (PIMRC), Washington, Sept. 2014.

  28. C. Mavrokefalidis, A.A. Rontogiannis, E. Kofidis, A. Beikos, S. Theodoridis, “Efficient Adaptive Equalization of Doubly Dispersive Channels in MIMO-FBMC/OQAM Systems”, In proceedings of the 11th International Symposium on Wireless Communication Systems (ISWCS), Barcelona, Aug. 2014.

  29. S.D. Xenaki, K.D. Koutroumbas, A.A. Rontogiannis, O. Sykioti, “A Sparse Adaptive Possibilistic Approach for Hyperspectral Image Clustering”, In proceedings of the 35th IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Quebec, July 2014. (pdf)

  30. P. Giampouras, K. Themelis, A.A. Rontogiannis, K. Koutroumbas, “A Variational Bayes Algorithm for Joint-Sparse Abundance Estimation”, In proceedings of the 6th Workshop on Hyperspectral  Image and Signal Processing: Evolution in Remote Sensing (WHISPERS), Lausanne, June 2014. (pdf)

  31. S.D. Xenaki, K.D. Koutroumbas, A.A. Rontogiannis, “Sequential Sparse Adaptive Possibilistic Clustering”, In proceedings of the 8th Hellenic Conference on Artificial Inteligence (SETN), Ioannina, May 2014. (pdf)

  32. K. Themelis, A.A. Rontogiannis, K. Koutroumbas, “Adaptive Sparse Variational Bayesian Estimation”, In proceedings of the IEEE International Conference on Acoustics Speech and Signal Processing (ICASSP), Florence, May 2014. (pdf)

  33. S.D. Xenaki, K.D. Koutroumbas, A.A. Rontogiannis, “Sparse Adaptive Possibilistic Clustering”, In proceedings of the IEEE International Conference on Acoustics Speech and Signal Processing (ICASSP), Florence, May 2014. (pdf)

     

  34. P. Bithas, A.A. Rontogiannis, “Performance Analysis of Mobile Communication Networks in the Presence of Composite Fading, Noise and Interference”, In proceedings of the IEEE International Symposium on Signal Processing and Information Technology (ISSPIT), Athens, Dec. 2013. (Best Paper Award winning paper in the IT track of the conference) (pdf)

  35. S.D. Xenaki, K.D. Koutroumbas, A.A. Rontogiannis, “Adaptive Possibilistic Clustering”, In proceedings of the IEEE International Symposium on Signal Processing and Information Technology (ISSPIT), Athens, Dec. 2013. (pdf)

  36. K. Themelis, A.A. Rontogiannis, K. Koutroumbas, “Variational Bayesian Sparse Adaptive Filtering Using a Gauss-Seidel Recursive Approach”, In proceedings of the 21th European Signal Processing Conference (EUSIPCO), Marrakech, Morocoo, Sept. 2013. (pdf)

  37. C. Mavrokefalidis, E. Kofidis, A.A. Rontogiannis, S. Theodoridis, “Preamble Design for Channel Estimation in OFDM/OQAM Cooperative Systems”, In proceedings of the 10th International Symposium on Wireless Communication Systems (ISWCS), Ilmenau, Germany, Aug. 2013. (pdf)

  38. C. Mavrokefalidis, E. Kofidis, A.A. Rontogiannis, S. Theodoridis, “Optimal Training Design for Channel Estimation in OFDM/OQAM Cooperative Systems”, In proceedings of the IEEE 14th Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Darmstadt, Germany, June 2013. (pdf)

  39. A.A. Rontogiannis, K.E. Themelis, O. Sykioti, K.D. Koutroumbas, “A Fast Variational Bayes Algorithm for Sparse Semi-Supervised Unmixing of OMEGA Mars Express Data”, In proceedings of the 5th Workshop on Hyperspectral  Image and Signal Processing: Evolution in Remote Sensing (WHISPERS), Gainsville, Florida, June 2013. (pdf)

  40. A.A. Rontogiannis, K.E. Themelis, K.D.  Koutroumbas, "A Fast Algorithm for the Bayesian Adaptive Lasso", In Proceedings of the 20th European Signal Processing Conference (EUSIPCO), Bucharest, Sept 2012. (pdf)

  41. V. Vlachos, A. Lalos, K. Berberidis A.A. Rontogiannis, “Greedy Algorithms for Sparse Adaptive Decision Feedback Equalization”, In Proceedings of  the IEEE International Symposium on Signal Processing and Information Technology (ISSPIT), Bilbao, Dec. 2011.

  42. K. Themelis, A.A. Rontogiannis, K. Koutroumbas, "Sparse Semi-Supervised Hyperspectral Unmixing Using a Novel Iterative Bayesian Inference Algorithm", In Proceedings of the 19th European Signal Processing Conference (EUSIPCO), Barcelona, Sept 2011. (pdf)

  43. C. Mavrokefalidis, A.A. Rontogiannis, K. Berberidis, “Training Design in Single Relay AF Cooperative Systems with Correlated Channels”, In Proceedings of  the IEEE International Conference on Acoustics Speech and Signal Processing (ICASSP), Prague, 2011. (pdf)

  44. K. Rizogiannis, E. Kofidis, A.A. Rontogiannis, S. Theodoridis, “Adaptive BLAST-Type Decision Feedback Equalizers for DS-CDMA Systems”, In Proceedings of the IEEE International Conference on Communication Systems (ICCS), Singapore, Nov. 2010. (pdf)

  45. K. Themelis, A.A. Rontogiannis, O. Sykioti, K. Koutroumbas, I. Daglis, F. Schmidt, “On the Unmixing of MEx/OMEGA Hyperspectral Data”, In Proceeding of the European Planetary Science Congress (EPSC) , Rome, Sept. 2010.(pdf)

  46. E. Kofidis, A.A. Rontogiannis, “Adaptive V-BLAST Decision Feedback Equalizer for MIMO-FBMC/OQAM Systems”, In Proceedings of the 21th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Istanbul, Sept. 2010.(pdf)

  47. C. Mavrokefalidis, A.A. Rontogiannis, K. Berberidis, “Optimal Training Design and Placement for Channel Estimation in Cooperative Networks”, In Proceedings of the IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Marrakech, Morocco,  June 2010.(pdf)

  48. K. Themelis, A.A. Rontogiannis, K. Koutroumbas, “Semi-Supervised Hyperspectral Unmixing via the Weighted Lasso”,  in Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Dallas, TX, March 2010. (pdf)

  49. G.A. Ropokis, A.A. Rontogiannis, K. Berberidis, P.T. Mathiopoulos, “Performance Analysis of Maximal Ratio Combining over Shadow-Rice Fading Channels”, In Proceedings of the 5th International Workshop on Satellite and Space Communications (IWSSC), Siena, Sept. 2009.(pdf)

  50. K. Themelis, A.A. Rontogiannis, “A Soft Constrained MAP Estimator for Supervised Hyperspectral Signal Unmixing”, In Proceedings of the 16th European Signal Processing Conference (EUSIPCO), Lausanne, Aug. 2008. (pdf)

  51. D.Ampeliotis, A.A. Rontogiannis, K. Berberidis, M. Papaleo, G.E. Corazza, “Turbo Equalization of Non-Linear Satellite Channels using Soft Interference Cancellation“, In Proceedings of the 4th Advanced Satellites Mobile Systems Conference, Bologna, Aug. 2008.(pdf)

  52. A. Lalos, A.A. Rontogiannis, K. Berberidis, “Channel Estimation Techniques in Amplify and Forward Relay Networks“, In Proceedings of the IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Recife, Brazil, July 2008. (pdf)

  53. A. Lalos, A.A. Rontogiannis, K. Berberidis, “Channel Estimation Techniques for Half-Duplex Cooperative Communication Systems”, In Proceedings of the IEEE International Symposium on Wireless Pervasive Computing, Santorini, May 2008.(pdf)

  54. C. Mavrokefalidis, K. Berberidis, A.A. Rontogiannis,  “Semi-blind Channel Estimation Schemes based on a Cooperative Form of the Cross Relation Criterion”, In Proceedings of the IEEE International Symposium on Wireless Pervasive Computing, Santorini, May 2008.(pdf)

  55. G.A. Ropokis, A.A. Rontogiannis, P.T. Mathiopoulos, “Performance Analysis of Space-Time Block Coding over Hoyt Fading Channels”, In Proceeding of the IEEE Global Communications Conference (GLOBECOM), Washington D.C., Nov. 2007. (pdf)

  56. V. Kekatos, K. Berberidis, A.A. Rontogiannis, ‘’A Block Adaptive Frequency Domain MIMO DFE for Wideband Channels”, In Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), vol. III, pp. 197-200, Honolulu, Hawaii, April 2007. (pdf)

  57. G.A. Ropokis, A.A. Rontogiannis, P.T. Mathiopoulos, “Information Outage Probability of Orthogonal Space-Time Block Codes over Hoyt-Distributed Fading Channels”, In Proceedings of the 2nd International Workshop on Satellite and Space Communications (IWSSC), Madrid, Sept. 2006. (pdf)

  58. A.A. Rontogiannis, V. Kekatos, K. Berberidis, “An Adaptive Decision Feedback Equalizer for Frequency Selective MIMO Channels”, In Proceedings of the IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Cannes, July 2006. (pdf)

  59. A.A. Rontogiannis, V. Kekatos, K. Berberidis, “A Square-Root Adaptive V-BLAST Algorithm for Fast Time-Varying MIMO Channels”, In Proceedings of the IEEE International Conference on Communications (ICC), Istanbul, Turkey, June 2006. (pdf)

  60. P.S. Bithas, N.S. Sagias, G.K. Karagiannidis, P.T. Mathiopoulos, A.A. Rontogiannis, “Digital Communications over Generalized-K Fading Channels”, In Proceedings of the International Workshop on Satellite and Space Communications (IWSSC), Siena, Sept. 2005. (pdf)

  61. V. Kekatos, A.A. Rontogiannis, K. Berberidis, “A Robust Method for Estimating Multipath Channel Parameters in the Uplink of a DS-CDMA System”, In Proceedings of the IEEE 61th Vehicular Technology Conference (VTC Spring), Stockholm, May 2005. (pdf)

  62. A.A. Rontogiannis, K. Berberidis, “Bandwidth Efficient Transmission Through Sparse Channels Using a Parametric Channel Estimation-Based DFE”, In Proceedings of the IEEE Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Lisbon, July 2004. (pdf)

  63. A.A. Rontogiannis, A. Marava, K. Berberidis, J. Palicot, “Efficient Multipath Channel Estimation Using a Semi-Blind Parametric Technique”, In Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), vol. IV, pp. 477-480, Hong Kong, Apr. 2003. (also presented in the IEEE Workshop on Neural Networks for Signal Processing, Toulouse, Sept. 2003.) (pdf)

  64. A.A. Rontogiannis, K. Berberidis, A. Marava, “A Semi-Blind Equalization Technique for Wireless Burst Transmission Systems”, In Proceedings of the 11th European Signal Processing Conference (EUSIPCO), vol. II, pp. 285-288, Toulouse, Sept. 2002. (pdf)

  65. A.A. Rontogiannis, A. Marava, K. Berberidis, J. Palicot, “Semi-Blind Estimation of Multipath Channel Parameters via a Separable Least Squares Approach”, In Proceedings of the 14th International Conference on Digital Signal Processing (DSP), vol. I, pp. 49-52, Santorini, July 2002. (pdf)

  66. A.A. Rontogiannis, K. Berberidis, “A Low Complexity Decision Feedback Equalizer for Wideband Wireless Applications”, In Proceedings of the IEEE International Conference on Telecommunications (ICT), vol. 2, pp. 230-235, Bucharest, June 2001.(pdf)

  67. K. Berberidis, A.A. Rontogiannis, “Efficient Decision Feedback Equalizer for Sparse Multipath Channels”, In Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 2725-2728, Istanbul, Turkey, June 2000. (pdf)

  68. K. Berberidis, A.A. Rontogiannis, S. Theodoridis, “Efficient Block Implementation of the LMS-Based DFE”, In Proceedings of the 13th International Conference on Digital Signal Processing (DSP), pp. 143-146, Santorini, July 1997.(pdf)

  69. A.A. Rontogiannis, S. Theodoridis, “New Multichannel Fast QRD-LS Adaptive Algorithms”, In Proceedings of the 13th International Conference on Digital Signal Processing (DSP), pp. 45-48, Santorini, July 1997.(pdf)

  70. A.A. Rontogiannis, S. Theodoridis, “An Adaptive LS Algorithm Based on Orthogonal Householder Transformations”, In Proceedings of the IEEE International Conference on Electronics, Circuits and Systems (ICECS), pp. 860-863, Rhodes, Oct. 1996.(pdf)

  71. A.A. Rontogiannis, S. Theodoridis, “A Highly Parallel Multichannel Fast QRD Least Squares Adaptive Algorithm”, In Proceedings of the 8th European Signal Processing Conference (EUSIPCO), pp. 1381-1384, Trieste, Italy, Sept. 1996. (pdf)

  72. A.A. Rontogiannis, S. Theodoridis, “New Fast Inverse QR Least Squares Adaptive Algorithms”, In Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 1412-1415, Detroit, MI, May 1995. (pdf)

  73. A. Rontogiannis, N.J. Dimopoulos, “A Probabilistic Approach for Reducing the Search Cost in Binary Decision Trees”, in Proceedings of the IEEE Pacific Rim Conference on Computers, Electronics and Signal Processing (PACRIM), pp. 984-987, Victoria, B.C., Canada, May 1993. (pdf)

     

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