Publications

Journal Publications

  1. M. C. Filippou, G. A. Ropokis, D. Gesbert and T. Ratnarajah, “Joint Sensing and Reception Design of SIMO Hybrid Cognitive Radio Systems”, IEEE Transactions on Wireless Communications, vol. 15, no. 9, September 2016 [.pdf].
  2. M. C. Filippou, P. de Kerret, D. Gesbert, T. Ratnarajah, A. Pastore and G. A. Ropokis, “Coordinated Shared Spectrum precoding with Distributed CSIT”,  IEEE Transactions on Wireless Communications, vol. 15, no. 8, August 2016 [.pdf].
  3. M. C. Filippou, D. Gesbert and G. A. Ropokis, “A comparative performance analysis of interweave and underlay multi-antenna cognitive radio networks”, IEEE Transactions on Wireless Communications, vol. 14, no. 5, pp. 2912-2925, May 2015 [.pdf].
  4. G. A. Ropokis, A. A. Rontogiannis and 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].
  5. G. A. 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].
  6. I. Sandberg, S. Benkadda, X. Garbet, G. Ropokis, K. Hizanidis, D. Del-Castillo-Negrete, “Universal probability distribution function for bursty transport in plasma turbulence” (2009) Physical Review Letters, 103 (16), art. no. 165001 [.pdf].
  7. G. A. 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].

Conference publications

  1. G. A. Ropokis, M. M. Butt, N. Marchetti, and L. A. DaSilva, “Optimal Power Allocation for Energy Recycling Assisted Cooperative Communications” IEEE WCNC, San Francisco, USA, March 2017
  2. G. A. Ropokis, M. C. Filippou, A. A. Rontogiannis, L. A. DaSilva, N. Marchetti, V. Frascolla, and P. T. Mathiopoulos, “Optimal  Sensing and Power allocation in Pilot-Aided Shared Access Systems: A BER minimization apporach”, 17th Intl. Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Edinburgh, UK, 3-6 July 2016 [.pdf].
  3. G. A. Ropokis and F. Foukalas, “Energy Efficient Power Allocation for Carrier Aggregation Enabled Communications Systems”,  IEEE WCNC, Doha, April 2016 [.pdf].
  4. G. A. Ropokis, C. G. Tsinos, M. C. Filippou, K. Berberidis, D. Gesbert and T. Ratnarajah, “Joint Power and Sensing Optimization for Hybrid Cognitive Radios with limited CSIT”, European Wireless 2015, Budapest, May 2015 [.pdf].
  5. M. C. Filippou, G. A. Ropokis, D. Gesbert and T. Ratnarajah, “Performance analysis and optimizatoin of Hybrid MIMO Cognitive Radio Systems”,  ICC 2015 – Workshop on MIMO and Cognitive Radio Technologies in Multihop Network (MIMOCR), London, Jun. 2015 [.pdf].
  6. M. C. Filippou, D. Gesbert and G. A. Ropokis, “Underlay versus interweaved cognitive radio networks: A performance comparison study”, In Proceedings of the 9th International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM), Oulu, Jun. 2014 [.pdf].
  7. G. A. Ropokis, D. Gesbert and K. Berberidis, “Optimal power control in cognitive MIMO systems with limited feedback”, In Proceedings of the 6th International Symposium on Communications, Control and Signal Processing (ISCCSP), Athens, May, 2014 [.pdf].
  8. G. A. Ropokis, D. Gesbert and K. Berberidis, “Rate optimal power policies in underlay cognitive radios with limited channel feedback”, In Proceedings of the IEEE 24th International Symposium on Personal Indoor and Mobile Radio Communications, London, Sept. 2013 [.pdf].
  9. M.C. Filippou, G. A. Ropokis, D. Gesbert, “A team decisional beamforming approach for underlay cognitive radio networks”, In Proceedings of the IEEE 24th International Symposium on Personal Indoor and Mobile Radio Communications, London, Sept. 2013 [.pdf].
  10. M. C. Filippou, D. Gesbert, and G. A. Ropokis, “Optimal Combining of Instantaneous and Statistical CSI in the SIMO Interference channel”, In Proceedings of the IEEE 77th Vehicular Technology Conference (VTC), Dresden, Jun. 2013 [.pdf].
  11. 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].
  12. G.A. Ropokis, A.A. Rontogiannis, P.T. Mathiopoulos, “Performance Analysis of Space-Time Block Coding over Hoyt Fading Channels”, In Proceedings of the IEEE Global Communications Conference (GLOBECOM), Washington D.C., Nov. 2007 [.pdf].
  13. 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].

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