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SUMMARY

Dr Stelios Papaharalabos is a member of the Broadband Wireless and Sensor Networks (B-WiSE) research group of the Athens Information Technology (AIT) since June 2011. He was born in Trikala, Greece. He received his Diploma degree in Electrical and Computer Engineering from the Aristotle University of Thessaloniki, Greece (2001), his MSc by Research degree in Electrical Engineering from the University of Surrey, UK (2002) and also his PhD degree in Electrical Engineering from the same University (2006). In 2004, Fall he was a visting researcher at the University of Bologna, Italy investigating the applicability of low-complexity LDPC decoding algorithms for DVB-S2 standard. Since 2006 he has been with the Institute for Space Applications and Remote Sensing (ISARS) of the National Observatory of Athens as a post-doctoral research fellow. During the past years of research he has been a Task leader in 5 European R&D IST (FP6, FP7) and ESA projects dealing with cutting edge wireless terrestial/satellite communication systems, whereas he has established active collaborations with many academic departments worldwide (UK, Italy, Poland, Slovenia, and PR of China). His research interests are mainly advanced channel coding schemes and iterative decoding techniques and he has published more than 35 journal and conference papers in these fields, including co-authoring 2 book chapters and receiving more than 58 citations. He has been TCP member in 14 international conferences relevant to signal processing algorithms and satellite communication systems. For SPACOMM 2010, 2011, and 2012 conferences he has been an Advisory Chairs Committee Member. He has been an exemplary reviewer (top 3%) for IEEE Communications Letters and an Editorial board member of the IARIA International Journal On Advances in Telecommunications.

EDUCATION

PROFESSIONAL EXPERIENCE

Task Leader in EU/ESA R&D Projects

• ESA SATNEX-III CoO-2 (Satellite Communications Networks of Experts, Phase III, Call of Order 2)
• ESA SATNEX-III CoO-1 (Satellite Communications Networks of Experts, Phase III, Call of Order 1)
• IST NEWCOM++, FP7 (Network of Excellence in Wireless Communications)
• IST SATNEX-II, FP6 (Satellite Communications Networks of Excellence, Phase II)
• ESA S-OFDM (Enhanced Multicarrier OFDM Digital Transmission Techniques for Broadband Satellites)

Consultant in Industrial R&D Projects

• Design and Applications of Low Rate LDPC Codes
• Low Rate DVB-RCS Turbo Codes Design
• Channel Coding for GEO-Mobile Satellite Systems
• Stopping Criteria Rules for Turbo Decoders
• Turbo Codes Design for Deep Space Communications

PROFESSIONAL QUALIFICATIONS

Technical Expert - Evaluator in R&D Projects Proposals

• French National Agency for Research (ANR)
• Ministry of Science and Technological Development of the Republic of Serbia
• Greek Nano/Microelectronics and Embedded Systems cluster

Advisory Chairs Committee Member

• 4th International Conference on Advances in Satellite and Space Communications (SPACOMM), Chamonix, France, 29/04-4/05/12
• 3rd International Conference on Advances in Satellite and Space Communications (SPACOMM), Budapest, Hungary, 17-22/04/11
• 2nd International Conference on Advances in Satellite and Space Communications (SPACOMM), Athens, Greece, 13-19/06/10

DISTINCTIONS 

• Editorial board member of the IARIA International Journal On Advances in Telecommunications
• Exemplary Reviewer for IEEE Communications Letters
• Three years scholarship for PhD Degree, Electronics and Physical Sciences Research Council (EPSRC), Department of Trade and Industry, Office of Science and Technology, UK
• One year scholarship for Master by Research (MRes) Degree, Electronics and Physical Sciences Research Council (EPSRC), Department of Trade and Industry, Office of Science and Technology, UK

TEACHING EXPERIENCE

• Computing Laboratory, Undergraduate Level Year 1, School of Pedagogical and Technological Education, Athens, Greece (2010)
• Modulation and Coding Laboratory, Postgraduate Level, School of Electronics and Physical Sciences, University of Surrey, UK (2003, 2004)
• Electronics Laboratory, Undergraduate Level Year 2, School of Electronics and Physical Sciences, University of Surrey, UK (2003)

PROFESSIONAL MEMBERSHIPS

• Hellenic Association of Mechanical and Electrical Engineers
• Technical Chamber of Greece
• Institute of Engineering and Technology (ΙΕT)
• Institute of Electrical and Electronics Engineers (IEEE)

 RESEARCH INTERESTS

• Turbo/LDPC codes
• Iterative decoding
• Joint source and channel coding
• Coded modulation
• Channel modelling
• Estimation algorithms
• Cooperative communications
• Software/cognitive radios 

 TECHNICAL PROGRAM COMMITEEE (TPC) MEMBER

Book Chapters

1. G. Albertazzi, M. Chiani, G. E. Corazza, A. Duverdier, H. Ernst, W. Gappmair, G. Liva, and S. Papaharalabos, “Forward Error Correction”, Chapter 5, Digital Satellite Communications, Edited by G. E. Corazza, Springer-Verlag New York Inc, 2006, ISBN-13: 978-0387256344
2. P. T. Mathiopoulos, G. Albertazzi, P. S. Bithas, S. Cioni, G. E. Corazza, A. Duverdier, T. Javornik, S. Morosi, M. Neri, S. Papaharalabos, N. Sagias, “Modulation Techniques”, Chapter 6, Digital Satellite Communications, Edited by G. E. Corazza, Springer-Verlag New York Inc, 2006, ISBN-13: 978-0387256344

Journals and Letters

1. S. Papaharalabos, P. Sweeney, and B. G. Evans, “Modification of Branch Metric Calculation to Improve Iterative SOVA Decoding of Turbo Codes”, IEE Electronics Letters, Vol. 39, No. 19, 18 Sep. 2003, pp. 1391-1392
2. S. Papaharalabos, P. Sweeney, and B. G. Evans, “SISO Algorithms Based on Combined Max/Max* Operations for Turbo Decoding”, IEE Electronics Letters, Vol. 41, No. 3, 3 Feb. 2005, pp. 142-143
3. S. Papaharalabos, P. Sweeney, and B. G. Evans, “Constant Log-MAP Decoding Algorithm for Duo-Binary Turbo Codes”, IEE Electronics Letters, Vol. 42, No. 12, 8 June 2006, pp.709-710
4. S. Papaharalabos, P. Sweeney, B. G. Evans, and P. T. Mathiopoulos, “Improved Performance SOVA Turbo Decoder”, IEE Proc. Communications, Vol. 153, No. 5, Oct. 2006, pp. 586-591
5. S. Papaharalabos, P. Sweeney, and B. G. Evans, “SISO Algorithms Based on Max-Log-MAP and Log-MAP Turbo Decoding”, IET Proc. Communications, Vol. 1, No. 1, Feb. 2007, pp. 49-54
6. S. Papaharalabos, P. Sweeney, B. G. Evans, P. T. Mathiopoulos, G. Albertazzi, A. Vanelli-Coralli, and G. E. Corazza, “Modified Sum-Product Algorithms for Decoding Low-Density Parity-Check (LDPC) Codes”, IET Proc. Communications, Vol. 1, No. 3, Jun. 2007, pp. 294-300
7. S. Papaharalabos, M. Papaleo, P. T. Mathiopoulos, M. Neri, A. Vanelli-Coralli, and G. E. Corazza, “DVB-S2 LDPC Decoding Using Robust Check Node Update Approximations”, IEEE Trans. Broadcasting, Vol. 54, No. 1, Mar. 2008, pp. 120-126
8. S. Papaharalabos, and P. T. Mathiopoulos, “Simplified Sum-Product Algorithm for Decoding LDPC Codes with Optimal Performance”, IET Electronics Letters, Vol. 45, No. 2, 15 Jan. 2009, pp. 116-117
9. M. Sybis, P. Tyczka, S. Papaharalabos, and P. T. Mathiopoulos, “Reduced-Complexity Algorithms for Near-Optimal Decoding of Turbo TCM Codes”, IET Electronics Letters, Vol. 45, No. 5, 26 Feb. 2009, pp. 278-279
10. S. Papaharalabos, P. T. Mathiopoulos, G. Masera, and M. Martina, “On Optimal and Near-Optimal Turbo Decoding Using Generalized max* Operator”, IEEE Commun. Letters, Vol. 13, No. 7, July 2009, pp. 522-524
11. H. Zhao, P. Fan, P. T. Mathiopoulos, and S. Papaharalabos, “On SNR Estimation Techniques for Turbo Decoding over Uncorrelated Rayleigh Fading Channels with Unknown Fading Parameters”, IEEE Trans. Vehic. Techn., Vol. 58, No. 9, Nov. 2009, pp. 4955-4961
12. M. Sybis, P. Tyczka, S. Papaharalabos, P. T. Mathiopoulos, G. Masera, and M. Martina, “Log-MAP Decoding of Turbo Codes and Turbo Trellis-Coded Modulation Using Piecewise-Linear Approximations of the max* Operator”, Electronics and Telecommunications Quarterly, Vol. 55, No. 3, 2009, pp. 435-451, ISSN 0867-6747
13. M. Sybis, P. Tyczka, S. Papaharalabos, P. T. Mathiopoulos, “Novel max* Approximation for Log-MAP Decoding and its Application to Turbo Codes and Turbo TCM”, Telecommunication Review and Telecommunication News, No. 6, 2010, pp. 424-427
14. D. Benmayor, S. Papaharalabos, P. T. Mathiopoulos, G. Tsiropoula, and P. Constantinou, “Design of Efficiently Encodable Rate-Compatible LDPC Codes Using Vandermonde Extension Matrices”, Wireless Pers. Commun., May 2010, DOI: 10.1007/s11277-010-9969-8
15. S. Papaharalabos, D. Benmayor, P. T. Mathiopoulos, and P. Fan, “Performance Comparisons and Improvements of Channel Coding Techniques for Digital Satellite Broadcasting to Mobile Users”, IEEE Trans. Broadcasting, Vol. 57, No. 1, Mar. 2011, pp. 94-102
16. M. Martina, G. Masera, S. Papaharalabos, P. T. Mathiopoulos, and F. Gioulekas, “On Practical Implementation and Generalizations of max* Operator for Turbo and LDPC Decoders”, IEEE Trans. Instrumentation and Measurement, Vol. 61, No. 4, Apr. 2012, pp. 888-895
17. S. Papaharalabos, P. T. Mathiopoulos, G. Masera, and M. Martina, “Novel Non-Recursive max* Operator with Reduced Implementation Complexity for Turbo Decoding”, IET Proc. Communications, accepted for publication, 2011
18. S. Papaharalabos, M. Sybis, P. Tyczka, and P. T. Mathiopoulos, “Novel Generalized max* Approximation Method for Simplified Decoding of Turbo and TTCM Codes”, Wireless Pers. Commun., Apr. 2012, (DOI) 10.1007/s11277-012-0578-6

Conferences

1. S. Papaharalabos, P. Sweeney, and B. G. Evans, “Turbo Coding Performance Evaluation Using an Improved Iterative SOVA Decoder”, Proc. AIAA ICSSC 2004, No. 3108, 9-12 May 2004, Monterey, California, USA
2. S. Papaharalabos, P. Sweeney, and B. G. Evans, “A New Method of Improving SOVA Turbo Decoding for AWGN, Rayleigh and Rician Fading Channels”, Proc. IEEE VTC 2004-Spring, Vol. 5, 17-19 May 2004, Milan, Italy, pp. 2862-2866
3. S. Papaharalabos, G. Albertazzi, P. Sweeney, B. G. Evans, A. Vanelli-Coralli, and G. E. Corazza “Performance Evaluation of A Modified Sum-Product Decoding Algorithm for LDPC Codes”, Proc. IEEE IWSSC, 8-9 Sep. 2005, Siena, Italy, pp. 800-804
4. S. Papaharalabos, P. Sweeney, and B. G. Evans, “Max/max* Operation Replacement to Improve the DVB-RCS Turbo Decoder”, Proc. AIAA ICSSC 2005, 25-28 Sep. 2005, Rome, Italy
5. G. Albertazzi, S. Papaharalabos, A. Vanelli-Coralli, G. E. Corazza, P. Sweeney, and B. G. Evans, “Two Reduced Complexity Decoding Algorithms for DVB-S2 LDPC Code”, Proc. 3rd ASMS-TF Conference, 29-31 May 2006, Herrsching am Ammersee, Germany
6. P. Fines, E. Christofylaki, S. Papaharalabos, P. Febvre, and E. Trachtman, “Low Rate Turbo Code Extensions and Modem Design for High Reliability Satellite Links”, Proc. ESA 4th Inter. Workshop on Tracking, Telemetry and Command Systems for Space Applications, 11-14 Sep. 2007, Darmstadt, Germany
7. G. E. Corazza, G. K. Karagiannidis, P. T. Mathiopoulos, D. S. Michalopoulos, C. Mosquera, S. Papaharalabos, S. Scalise, and A. Vanelli-Coralli, “Satellite Communications: Research Trends and Open Issues”, Proc. IEEE IWSSC 2007, 13-14 Sep. 2007, Salzburg, Austria, pp. 71-75
8. D. Benmayor, S. Papaharalabos, P. T. Mathiopoulos, and G. Tsiropoula, “Rate-Compatible Low-Density Parity-Check Codes for DVB-SH Applications”, Proc. IEEE IWSSC 2008, 1-3 Oct. 2008, Toulouse, France, pp. 239-243
9. S. Papaharalabos, M. Sybis, P. Tyczka, P. T. Mathiopoulos, G. Masera, and M. Martina, “Reduced Complexity Algorithms for Near-Optimal Decoding of Turbo and Turbo TCM Codes”, Proc. NEWCOM++-ARoRN Joint Workshop, 30 Mar. - 1Apr. 2009, Barcelona, Spain
10. S. Papaharalabos, M. Sybis, P. Tyczka, and P. T. Mathiopoulos, “Modified Log-MAP Algorithm for Simplified Decoding of Turbo and Turbo TCM Codes”, Proc. IEEE VTC 2009-Spring, 26-29 Apr. 2009, Barcelona, Spain
11. M. Sybis, P. Tyczka, S. Papaharalabos, P. T. Mathiopoulos, G. Masera, and M. Martina, “Log-MAP Decoding of Turbo Codes and Turbo Trellis-Coded Modulation Using Piecewise-Linear Approximations of the max* Operator”, Proc. 12th National Symposium of the Radio Science URSI, 16-17 Jun. 2009, Warsaw, Poland
12. M. Smolnikar, S. Papaharalabos, T. Javornik, M. Mohorcic, and P. T. Mathiopoulos, “Rate-Compatible Punctured DVB-S2 LDPC Codes for DVB-SH Applications”, Proc. IEEE IWSSC 2009, 9-11 Sep. 2009, Siena, Italy
13. N. Andreadou, S. Papaharalabos, F.–N. Pavlidou, and P. T. Mathiopoulos, “Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) Codes for Deep Space and High Data Rate Applications”, Proc. IEEE IWSSC 2009, 9-11 Sep. 2009, Siena, Italy
14. M. Sybis, P. Tyczka, S. Papaharalabos, P. T. Mathiopoulos, “Simplified Log-MAP Decoding with max* Approximation Based on the Jensen Inequality”, Proc. IEEE PIMRC 2010, 26-29 Sep. 2010, Istanbul, Turkey
15. G. C. Alexandropoulos, S. Papaharalabos, and C. B. Papadias, “On the Performance of Interference Alignment under Weak Interference Conditions”, Proc. IEEE IWSSIP 2012, 11–13 April 2012, Vienna, Austria