Publications

 

Book Chapters

CB2. H. Zhang, T. A. Tsiftsis, J. Cheng, and V. Leung, “Resource Allocation in Spectrum Sharing Cognitive Heterogeneous Networks”, Chapter in Book, Handbook of Cognitive Radio - Section "Dynamic Spectrum Access and Sharing", Handbook of Cognitive Radio, Springer 2017

CB1. Kaltenberger, T. A. Tsiftsis, F. Foukalas, S. Ping and O. Holland, «Aggregation of spectrum opportunities” Book chapter in "Opportunistic Spectrum Sharing and White Space Access: The Practical Reality", O. Holland, H. Bogucka, A. Medeisis, and V. Gediminas, (Eds.), Wiley, 2015.

 

Special Issues

[ED4] T. A. Tsiftsis, G. Ding, Y. Zou, G. K. Karagiannidis, Z. Han and L. Hanzo, "Guest Editorial Spectrum Sharing and Aggregation for Future Wireless Networks, Part III,"

IEEE Journal on Selected Areas in Communications, vol. 35, no. 1, pp. 1-5, Jan. 2017. doi: 10.1109/JSAC.2016.2633098

URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7815482&isnumber=7815452 

 

[ED3] T. A. Tsiftsis, G. Ding, Y. Zou, G. K. Karagiannidis, Z. Han and L. Hanzo, "Guest Editorial Spectrum Sharing and Aggregation for Future Wireless Networks, Part II,"  IEEE Journal on Selected Areas in Communications, vol. 34, no. 11, pp. 2809-2813, Nov. 2016. doi: 10.1109/JSAC.2016.2616287
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7733180&isnumber=7733166

 

[ED2] T. A. Tsiftsis, G. Ding, Y. Zou, G. K. Karagiannidis, Z. Han and L. Hanzo, "Guest Editorial Spectrum Sharing and Aggregation for Future Wireless Networks, Part I," IEEE Journal on Selected Areas in Communications, vol. 34, no. 10, pp. 2533-2536, Oct. 2016. doi: 10.1109/JSAC.2016.2606819                                            
URL:http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7589167&isnumber=7589115

 

[ED1] J. F. Paris, P. C. Sofotasios, and T. A. Tsiftsis, "Advances in Statistical Channel Modeling for Wireless Communications, " International Journal of Antennas and Propagation, vol. 2015, Article ID 541619, 2 pages, 2015. doi:10.1155/2015/541619 

 

Journal Papers

73. H. Moradi, T. A. Tsiftsis, and F. Foukalas, “Optimized Optical Wireless Receive Diversity under Alignment Disturbance,” IEEE/OSA Journal of Lightwave Technology, September 2017.

72. L. Gahane, P. K. Sharma, N. Varshney, T. A. Tsiftsis, and P. Kumar, “An Improved Energy Detector for Mobile Cognitive Users over Generalized Fading Channels,” IEEE Transactions on Communications, accepted for publication, September 2017.

71. H. Liu, K. J. Kim, T. A. Tsiftsis, K. S. Kwak, and H. V. Poor, "Secrecy Performance of Finite-Sized Cooperative Full-Duplex Relay Systems with Unreliable Backhauls, " IEEE Transactions on Signal Processing, accepted for publication, August 2017.

70. A. Rahmati, K. Raahemifar, A. Anpalagan, T. A. Tsiftsis, P. Azmi, and N. I. Miridakis, “Superposition Modulation based Cooperation for Oversampled OFDM Signals,” IEEE Transactions on Communications, accepted for publication, July 2017.

69. N. Qi, M. Xiao, T. A. Tsiftsis, M. Skoglund, and L. Li, "Efficient Coded Cooperative Networks with Energy Harvesting and Wireless Power Transfer, " IEEE Transactions on Wireless Communications, accepted for publication, June 2017.

68. S. Stefanatos, F. Foukalas and T. A. Tsiftsis, "Low Complexity Resource Allocation for Massive Carrier Aggregation," IEEE Transactions on Vehicular Technology, accepted for publication, June 2017.

67. C. Tsinos, F. Foukalas,  and T. A. Tsiftsis, "Resource Allocation for Licensed/Unlicensed Carrier Aggregation MIMO Systems, " IEEE Transactions on Communications, accepted for publications, May 2017. 

66. M. Sayed, T. A. Tsiftsis, and N. Al-Dhahir, "On the Diversity of Hybrid Narrowband-PLC/Wireless Communications for Smart Grids," IEEE Transactions on Wireless Communications, accepted for publications, May 2017. 

65. G. Ding, F. Wu, S. Tang, Q. Wu, F. Song, A. V. Vasilakos, and T. A. Tsiftsis, "Robust Online Spectrum Prediction with Incomplete and Corrupted Historical Observations, " IEEE Transactions on Vehicular Technology, accepted for publications, April 2017. 

64. N. Miridakis and T. A. Tsiftsis,  G. C. Alexandropoulos, and M. Debbah, "Simultaneous Spectrum Sensing and Data Transmission for Cognitive Spatial Multiplexing Systems, " IEEE Transactions on Wireless Communications.

63. P. C. Sofotasios, A. Bagheri, T. A. Tsiftsis, S. Freear, A. Shahzadi, and M. Valkama, "Novel Results on the Analysis of Spectrum Sensing in Non-Linear and Generalized Fading Conditions, " IEEE Transactions on Vehicular Technology, March 2017.

62. H. G. Sandalidis, A. Vavoulas, T. A. Tsiftsis, and N. Vaiopoulos, "Illumination, Data Transmission and Energy Harvesting: The Threefold Advantage of VLC, " OSA Applied Optics, accepted for publication, March 2017.

61. N. I. Miridakis and T. A. Tsiftsis, "EGC Reception for FSO Systems under Mixture-Gamma Fading Channels and Pointing Errors, " IEEE Communications Letters, accepted for publication, February 2017.

60. J. Qiu, G. Ding, Q. Wu, Z. Qian, T. A. Tsiftsis, Z. Du, and Y. Sun, "Hierarchical Resource Allocation Framework for HyperDense Small Cell Networks, " IEEE Access.

59. N. Miridakis, T. A. Tsiftsis and C. Rowell, "Distributed Spatial Multiplexing Systems with Hardware Impairments and Imperfect Channel Estimation under Rank-1 Rician Fading Channels, " IEEE Transactions on Vehicular Technology, October 2016.

58. M. Tang, G. Ding, Q. Wu, Z. Xue and T. A. Tsiftsis, "A Joint Tensor Completion and Prediction Scheme for Multi-Dimensional Spectrum Map Construction," IEEE Access, vol. 4, pp. 8044-8052, 2016.

57. N. I. Miridakis and T. A. Tsiftsis, "On the Joint Impact of Hardware Impairments and Imperfect CSI on Successive Decoding," IEEE Transactions on Vehicular Technology, accepted for publication, October 2016.

56. S. Arzykulov, G. Nauryzbayev and T. A. Tsiftsis, "Underlay Cognitive Relaying System Over $alpha $ - $mu $ Fading Channels," IEEE Communications Letters, vol. 21, no. 1, pp. 216-219, Jan. 2017.

55. N. I. Miridakis, T. A. Tsiftsis, G. C. Alexandropoulos and M. Debbah, "Green Cognitive Relaying: Opportunistically Switching Between Data Transmission and Energy Harvesting," IEEE Journal on Selected Areas in Communications, vol. 34, no. 12, pp. 3725-3738, Dec. 2016.

54. Í. Papanikolaou, M. Loupis, Í. Spiropoulos, Å. Mitronikas, Å. Ôatakis, C. Christodoulou, V. Zarikas, and T. A. Ôsiftsis, “On the investigation of energy saving aspects of commercial lifts,” Energy Efficiency, Springer, doi:10.1007/s12053-016-9495-y [This publication was a deliverable of a national project]

53. N. Qi, M. Xiao, T. A. Tsiftsis, M. Skoglund, P. L. Cao and L. Li, "Energy-Efficient Cooperative Network Coding with Joint Relay Scheduling and Power Allocation," IEEE Transactions on Communications, vol. 64, no. 11, pp. 4506-4519, Nov. 2016.

52. A. Galanopoulos, F. Foukalas and T. A. Tsiftsis, "Efficient Coexistence of LTE With WiFi in the Licensed and Unlicensed Spectrum Aggregation," IEEE Transactions on Cognitive Communications and Networking, vol. 2, no. 2, pp. 129-140, June 2016.

51. P. Kumar Sharma, A. Bansal, P. Garg, T. Tsiftsis and R. Barrios, "Relayed FSO communication with aperture averaging receivers and misalignment errors," IET Communications, vol. 11, no. 1, pp. 45-52, 1 5 2017.

50. X. Jiang, C. Zhong, X. Chen, T. Q. Duong, T. A. Tsiftsis and Z. Zhang, "Secrecy Performance of Wirelessly Powered Wiretap Channels," IEEE Transactions on Communications, vol. 64, no. 9, pp. 3858-3871, Sept. 2016.

49. I. Dey, T. A. Tsiftsis and C. Rowell, "Achievable Channel Cutoff Rate and Bandwidth Efficiency in Indoor Wireless Environments," IEEE Transactions on Vehicular Technology, vol. 65, no. 12, pp. 10074-10079, Dec. 2016.

48. H. Mosavat-Jahromiy, B. Maham, T. A. Tsiftsis, "Maximizing Spectral Efficiency for Energy Harvesting-Aware WBAN," IEEE Biomedical and Health Informatics.

47. T. A. Tsiftsis, F. Foukalas, G. K. Karagiannidis, and T. Khattab, "On the Higher-Order Statistics of the Channel Capacity in Dispersed Spectrum Cognitive Radio Systems over Generalized Fading Channels," IEEE Transactions on Vehicular Technology, vol. 65, no. 5, pp. 3818-3823, May 2016.

46. G. Ding, J. Wang, Q. Wu, Y.-D. Yao, F. Song, and T. A. Tsiftsis, "Cellular-Base-Station Assisted Device-to-Device Communications in TV white space," IEEE Journal on Selected Areas in Communications, vol. 34, no. 1, pp. 107-121, Jan. 2016.

45. A. Vavoulas, H.  G. Sandalidis, T. A. Tsiftsis, and N. Vaiopoulos, "Coverage Aspects of Indoor VLC Networks," IEEE/OSA Journal of Lightwave Technology, vol.33, no.23, pp.4915-4921, December 2015.

44. G. Zhu, C. Zhong, H. A. Suraweera, G. K. Karagiannidis, Z. Zhang, and T. A. Tsiftsis, "Wireless Information and Power Transfer in Relay Systems with Multiple Antennas and Interference," IEEE Transactions on Communications, vol.63, no.4, pp.1400,1418, April 2015.

43. T. Tsiftsis, P. C. Sofotasios, N. Papanikolaou, and M. Loupis, «On the Deployment of a Wireless Sensor Network in Dispersed Renewable Energy Sources for Increasing Efficiency of Power Distribution Networks”, Journal of Modern Power Systems and Clean Energy, Springer, June 2015.

42. P. C. Sofotasios, T. A. Tsiftsis, Y. A. Brychkov, S. Freear, M. Valkama, and G. K. Karagiannidis, “Analytic Expressions and Bounds for Special Functions and Applications in Communication Theory,” IEEE Transactions on Information Theory, vol. 60, no. 12, pp. 7798-7823, Dec. 2014.

41. M. Fareed, M. Uysal and T. A. Tsiftsis, "Error Rate Performance Analysis of Cooperative OFDMA System with Decode-and-Forward Relaying," IEEE Transactions on Vehicular Technology, vol. 63, no.5, pp. 2216-2223, June 2014.

40. F. Yang, J. Cheng, and T. A. Tsiftsis, "Free-Space Optical Communication with Nonzero Boresight Pointing Errors," IEEE Transactions on Communications, vol. 62, no.2, pp. 713-725, February 2014.

39. F. R. V. Guimaraes, D. B. da Costa, M. Benjillali, T. A. Tsiftsis, and G. K. Karagiannidis, "Cooperative Spectrum Sharing Systems with Relay Selection in the Presence of Multiple Primary Receivers," IET Communications, vol. 8, no. 4, pp. 546 – 553, March 2014.

38. F. R. V Guimaraes, D. B. da Costa, T. A. Tsiftsis, C. C. Cavalcante,  and G. K. Karagiannidis, "Multi-User and Multi-Relay Cognitive Radio Networks Under Spectrum Sharing Constraints," IEEE Transactions on Vehicular Technology, vol.63, no.1, pp.433-439, Jan. 2014.

37. T. A. Tsiftsis, N. Papanikolaou, M. Loupis and V. Zarikas, "On the Application of Cooperative Communications in Renewable Energy Sources for Maximizing the Reliability of Power Distribution Networks," Journal of Green Engineering, River Publishers, vol. 3, no. 4, July 2013.

36. H. Phan, T. Q. Duong, H.-J Zepernick, T. A. Tsiftsis, "Distributed Orthogonal Space-Time Block Coding in Wireless Relay Networks," IET Communications, vol. 7, no. 16,  pp. 1825 – 1835, November 2013.

35. P. C. Sofotasios, E. Rebeiz, L. Zhang, T. A. Tsiftsis, S. Freear, and D. Cabric, "Energy Detection-Based Spectrum Sensing over ê-ì and ê-ì Extreme Fading Channels," IEEE Transactions on Vehicular   Technology, vol.62, no.3, pp.1031-1040, March 2013.

  34. T. Q. Duong, D.B. da Costa, T. A. Tsiftsis, C. Zhong, and A. Nallanathan,"Outage and Diversity of Cognitive Relaying Systems under Spectrum Sharing Environments in Nakagami-m Fading," IEEE  Communications Letters, vol. 16, no. 12, pp. 2075       - 2078, December 2012.

33. T. Q. Duong, H. A. Suraweera, T. A. Tsiftsis, H.-J. Zepernick, and A. Nallanathan, "Keyhole Effect in Dual-Hop MIMO AF Relay Transmission with Space-Time Block Codes," IEEE Transactions on Communications, vol. 60, no. 12, pp.3683-3693, December 2012.

32. H. Ding, J. Ge, D.B. da Costa and T. A. Tsiftsis, "A Novel Distributed Antenna Selection Scheme for Fixed-Gain Amplify-and-Forward Relaying Systems," IEEE Transactions on Vehicular Technology, vol.61, no.6, pp.2836-2842, July 2012.

31. T. A. Tsiftsis, K. J. Kim, and K. S. Kwak, "Cooperative wireless personal area network systems with partial best relay selection," Transactions on Emerging Telecommunications Technologies, vol. 23, no. 2, pages 133–136, March 2012.

30. K. J. Kim, Yongzhao Li and T. A. Tsiftsis, "On the Performance of Cyclic Prefixed Single-Carrier Cellular Systems in Co-Channel Interference," IEEE Transactions on Vehicular Technology, vol. 60, no. 8, pp. 4035-4040, October 2011.

29. K. J. Kim, T. A. Tsiftsis, and R. Schober, "Semi-Blind Iterative Receiver for Coded MIMO-OFDM Systems" IEEE Transactions on Vehicular Technology, vol. 60, no. 7, pp. 3156-3168, September 2011.

28. T. Hazim, G. K. Karagiannidis, and T. A. Tsiftsis, "On the Probability of Early Detection of UWB Positioning Sensor Networks," IET Wireless Sensor Systems, vol. 1, no. 3, pp. 123–128, September 2011.

27. K. J. Kim, T. A. Tsiftsis, and V. H. Poor, "Power Allocation in Cyclic Prefixed Single-Carrier Relaying Systems," IEEE Transactions on Wireless Communications, vol.10, no.7, pp.2294-2305, July 2011.

26. K. J. Kim and T. A. Tsiftsis, "On the Performance of Cyclic Prefix-Based Single-Carrier Cooperative Diversity Systems with Best Relay Selection," IEEE Transactions on Wireless Communications, vol. 10, no. 4, pp. 1269-1279, April 2011.

25. H. A. Suraweera, T. A. Tsiftsis, G. K. Karagiannidis, and A. Nallanathan, "Effect of Feedback Delay on Amplify-and-Forward Relay Networks with Beamforming," IEEE Transactions on Vehicular Technology, vol. 60, no.3, pp. 1265-1271, March 2011.

24. T. Q. Duong, G. C. Alexandropoulos, H.-J. Zepernick, and T. A. Tsiftsis, "Orthogonal Space-Time Block Codes with CSI-Assisted Amplify-and-Forward Relaying in Correlated Nakagami-m Fading Channels," IEEE Transactions on Vehicular Technology, vol. 60, no.3, pp. 882-889, March 2011.

23. K. J. Kim and T. A. Tsiftsis, "Performance Analysis of QRD-based Cyclically Prefixed Single-Carrier Transmissions with Opportunistic Scheduling," IEEE Transactions on Vehicular Technology, vol. 60, no.1, pp. 328-333, January 2011.

22. K. J. Kim and T. A. Tsiftsis, "Performance Analysis of Cyclically Prefixed Single-Carrier Transmissions with Outdated Opportunistic User Selection, "IEEE Signal Processing Letters, vol. 17, no. 10, pp. 847-850, October 2010.

21. T. Q. Duong, G. C. Alexandropoulos, T. A. Tsiftsis, and H.-J. Zepernick, "Outage Probability of MIMO AF Relay Networks over Nakagami-m Fading Channels," Electronics Letters, vol. 46, no. 17, pp.1229–1231, August 2010.

20. N. D. Chatzidiamantis, M. Uysal, T. A. Tsiftsis, and G. K. Karagiannidis, "Iterative Maximum-Likelihood Sequence Detection for MIMO Optical Wireless Systems," IEEE/OSA Journal of Lightwave Technology, IEEE/OSA Journal of Lightwave Technology, vol.28, no.7, pp.1064-1070, April 2010.

19. H. G. Sandalidis, T. A. Tsiftsis, and G. K. Karagiannidis, "Optical Wireless Communication Systems with Heterodyne Detection over Turbulence Channels with Pointing Errors," IEEE/OSA Journal of Lightwave Technology, vol. 27, no. 20, pp. 4440 - 4445, October 2009.

18. H. Nistazakis, T. A. Tsiftsis, and G. Tombras, "Performance Analysis of Free-Space Optical Communication Systems over Atmospheric Turbulence Channels," IET-Communications, vol. 3, no. 8, p.1402–1409, August 2009.

17. T. A. Tsiftsis, H. G. Sandalidis, G. K. Karagiannidis, and M. Uysal, "Optical Wireless Links with Spatial Diversity over Strong Atmospheric Turbulence Channels," IEEE Transactions on Wireless Communications, vol. 8, no. 2, pp. 951 - 957, February 2009.

16. A. S. Lioumpas, G. K. Karagiannidis and T. A. Tsiftsis, "Adaptive Generalized Selection Combining (A-GSC) Receivers," IEEE Transactions on Wireless Communications, vol.7, no.12, pp.5214-5219, December 2008.

15. T. A. Tsiftsis, "Performance of Heterodyne Wireless Optical Communication Systems over Gamma-Gamma Atmospheric Turbulence Channels," Electronics Letters, vol. 44, no. 5, pp. 373-375, 28th February 2008.

14. D. S. Michalopoulos and T. A. Tsiftsis, "Performance Analysis of Wireless Multihop Diversity Systems," International Journal of Communications Systems – Wiley, vol. 21 no. 9, pp. 955-969, September 2008.

13. H. G. Sandalidis and T. A. Tsiftsis, "Outage Probability and Ergodic Capacity of Free-Space Optical Links over Strong Turbulence," Electronics Letters, vol. 44, no. 1, pp. 46-47, 3rd January 2008.

12. H. G. Sandalidis, T. A. Tsiftsis, George K. Karagiannidis and Murat Uysal, "BER Performance of FSO Links over Strong Atmospheric Turbulence Channels with Pointing Errors," IEEE Communications Letters, vol. 12, no.1, pp. 44-46, January 2008. 

11. P. S. Bithas, N. C. Sagias, and T. A. Tsiftsis, "Performance analysis of dual-diversity receivers over correlated generalized Gamma fading channels," IET Communications, vol. 2, no.1, pp. 174-178, January 2008.   

10. T. A. Tsiftsis, "Performance of wireless multihop communications systems with cooperative diversity over fading channels," International Journal of Communications Systems, Wiley, vol. 20, no. 12, December 2007.  

9. D. S. Michalopoulos, G. K. Karagiannidis, T. A. Tsiftsis, and R. K. Mallik, "Distributed Transmit Antenna Selection (DTAS) under Performance or Energy Consumption Constraints," IEEE Transactions on Wireless Communications, vol. 7, no.4, pp.1168-1173, April 2008.

8. N. C. Sagias, G. K. Karagiannidis, P. T. Mathiopoulos, and T. A. Tsiftsis, "On the Performance Analysis of Equal Gain Diversity Receivers Over Generalized Gamma Fading Channels," IEEE Transactions on Wireless Communications, vol. 5, no. 10, pp. 2967-2975, October 2006.

7. G. K. Karagiannidis, T. A. Tsiftsis, and H. S. Sandalidis, "Outage Probability of Relayed Free-Space Optical Communication Systems"   Electronics Letters, vol. 42, no. 17, pp. 1732-1745, August 2006.

6. T. A. Tsiftsis, G. K. Karagiannidis, P. T. Mathiopoulos, and S. A. Kotsopoulos, "Nonregenerative dual-hop cooperative links with selection diversity," Special Issue of the EURASIP Journal on Wireless Communications and Networking in Multiuser Cooperative Diversity for Wireless Networks, Volume 2006.

5. G. K. Karagiannidis, N. C. Sagias and T. A. Tsiftsis, "Exact Closed-Form Statistics for the Sum of Squared Nakagami-m Variates and Its Applications," IEEE Transactions on Communications, vol. 54, no. 8, pp. 1353-1359, August 2006 .

4. G. K. Karagiannidis,  T. A. Tsiftsis and R. K. Mallik, "Bounds for Multihop Relayed Communications in Nakagami-m Fading," IEEE Transactions on Communications, vol. 54, no. 1, pp. 18-22, January 2006.

3. T. A. Tsiftsis, G. K. Karagiannidis, S. A. Kotsopoulos, "Dual-hop wireless communications with combined gain relays," IEE Proceedings Communications, vol. 152, no. 5, October 2005.

2. G. K. Karagiannidis, T. A. Tsiftsis and  N. C. Sagias, "A Closed-Form Upper-Bound for the Distribution of the Weighted Sum of Rayleigh variates," IEEE Communications Letters, vol. 9, no. 7, July 2005.

1. T. A. Tsiftsis, G. K. Karagiannidis, S. A. Kotsopoulos and F.-N. Pavlidou, "BER analysis of collaborative dual-hop wireless transmissions," IEE Electronics Letters, vol. 40, no. 11, pp. 1732-1745, May 2004.

 

Conference Papers

 

55. S. Arzykulov, G. Nauryzbayev, T. A. Tsiftsis and M. Abdallah, “On the Capacity of Wireless Powered Cognitive Relay Network with Interference Alignment” IEEE Globecom 2017, Singapore.

54. S. Arzykulov, G. Nauryzbayev, T. A. Tsiftsis and M. Abdallah, “Error Performance of Wireless Powered Cognitive Relay Networks with Interference Alignment” PIMRC 2017, Montreal, Canada.

53. N. Qi, M. Xiao, T. A. Tsiftsis, L. Zhang, M. Skoglund, and H. Zhang, "Efficient Network-Coded Relaying Systems with Energy Harvesting and Transferring, " IEEE ICC 2017, Paris, France.

52. J. Bao, Z. Ma, M. Xiao, T. A. Tsiftsis, and Z. Zhu, "Performance Analysis of Uplink Sparse Code Multiple Access with Iterative Multiuser Receiver, " IEEE ICC 2017, Paris, France.

51. H. Wang, J. Wang, G. Ding, L. Wang, T. A. Tsiftsis, and P. K. Sharma, "Resource Allocation for the Energy Harvesting-Powered D2D Communication Underlaying Cellular Networks, " IEEE ICC 2017, Paris, France.

50. N. I. Miridakis, M. Xia, and T. A. Tsiftsis, "Optimal Power Allocation and Active Interference Mitigation for Underlay MIMO Cognitive Systems,” IEEE ICC 2017, Paris.

49. N. I. Miridakis, T. A. Tsiftsis, G. C. Alexandropoulos, and M. Debbah, "Simultaneous Spectrum Sensing and Data Transmission for Multi-User MIMO Cognitive Radio Systems," IEEE GLOBECOM 2016, Washington DC, USA, December 2016.

48. G. Nauryzbayev, S. Arzykulov, E. Alsusa, and T. A. Tsiftsis, "A Closed-form Solution to Implement Interference Alignment and Cancellation Scheme for the MIMO Three-user X-channel Model," 10th International Conference on Signal Processing and Communication Systems, ICSPCS’2016, Gold Coast, Australia, December 2016.

47. G. Nauryzbayev, S. Arzykulov, E. Alsusa, and T. A. Tsiftsis, " An Alignment-based Interference Cancellation Scheme for Network-MIMO Systems," 10th International Conference on Signal Processing and Communication Systems, ICSPCS’2016, Gold Coast, Australia, December 2016.

46. N. Qi, M. Xiao, T. A. Tsiftsis, P. L. Cao, M. Skoglund, and L. Li, "On the Energy Efficiency in Multi-user Multi-Relay Coded Network " ICT 2016, Thessaloniki, Greece, May 2016.

45. N. I. Miridakis, T. A. Tsiftsis, G. C. Alexandropoulos, and M. Debbah, "Energy Efficient Switching between Data Transmission and Energy Harvesting for Cooperative Cognitive Relaying Systems," IEEE ICC 2016, Kuala Lumpur, Malaysia, May 2016.

44. C. G. Tsinos, F. Foukalas, and T. A. Tsiftsis, "Resource Allocation for Licensed/Unlicensed Carrier Aggregation MIMO Systems," IEEE WCNC 2016, Doha Qatar, April 2016.

43. A. Bagheri, P C. Sofotasios, T. A. Tsiftsis, K. Ho-Van, M. I. Loupis, S. Freear, and M. Valkama, "Energy Detection Based Spectrum Sensing over Enriched Multipath Fading Channels, " IEEE WCNC 2016, Doha Qatar, April 2016.

42. H. Liu, J Chen, G. Ding, T. A. Tsiftsis, and C. Rowell, "Antenna Beamforming for Energy Harvesting in Cognitive Radio Networks, " IEEE IWS, Shanghai, China, March 2016.

41. A. Bagheri, P. C. Sofotasios, T. A. Tsiftsis, A. Shahzadi, S. Freear, and M. Valkama, "Area under ROC Curve of Energy Detection over Generalized Fading Channels," PIMRC 2015, Hong Kong, China, September 2015.

40. C. G. Zogogianni, D. Voglitsis, S. Saridakis, S. P. Syrigos, Stylianos N. P. Papanikolaou, A. Kyritsis, M. Loupis, T. A. Tsiftsis, and E. C. Tatakis, "Investigation of a Waste Heat Recovery System for a more electric ship, "  17th Power Electronics and Applications (EPE'15 ECCE-Europe), pp.1-10, 8-10 Sept. 2015.

39. A. Galanopoulos, T. A. Tsiftsis, and F. Foukalas, "Licensed Assisted Access: Key Enabling Functionalities and Initial Results," ISWCS' 2015, June 2015.

38. A.-A. A. Boulogeorgos, G. D. Ntouni, D. S. Karas, T. A. Tsiftsis, F. Foukalas, G. K. Karagiannidis, and C. Thomos, "MIMO Link Adaptation with Carrier Aggregation in LTE-A Heterogeneous Networks," European Conference on Networks and Communications (EuCNC 2015), June 2015.

37. P. K. Sharma, A. Bansal, P. Garg, T. A. Tsiftsis, and R. Barrios, «Performance of FSO Links under Exponentiated Weibull Turbulence Fading with Misalignment Errors,” IEEE International Conference on Communications (ICC), June 2015.

36.  G. Zhu, C. Zhong, H. A. Suraweera, G. K. Karagiannidis, Z. Zhang, and T. A. Tsiftsis, «Wireless Powered Dual-Hop Multiple Antenna Relay Transmission in the Presence of Interference,” IEEE International Conference on Communications (ICC), June 2015.

35. A. Bagheri, P. C. Sofotasios, T. A. Tsiftsis, A. Shahzadi, and M. Valkama, «AUC Study of Energy Detection Based Spectrum Sensing over ç−ì and á−ì Fading Channels,” IEEE International Conference on Communications (ICC), June 2015.

34. A. Bagheri, P. C. Sofotasios, T. A. Tsiftsis, A. Shahzadi, and M. Valkama «Spectrum Sensing in Generalized Multipath Fading Conditions Using Square-Law Combining,” IEEE International Conference on Communications (ICC), June 2015.

33.  G. D. Ntouni, A.-A. A. Boulogeorgos, D. S. Karas, T. A. Tsiftsis, F. Foukalas, V. M. Kapinas, G. K. Karagiannidis, "Inter-band Carrier Aggregation in Heterogeneous Networks: Design and Assessment," ISWCS’ 2014, Barcelona, Spain.

32. P. C. Sofotasios, M. Valkama, T. A. Tsiftsis, Y. A. Brychkov, S. Freear, and G. K. Karagiannidis, "Analytic Solutions to a Marcum Q−Function-Based Integral and Application in Energy Detection of Unknown Signals over Multipath Fading Channels," CROWNCOM 2014, 9th International Conference on Cognitive Radio Oriented Wireless Networks, Oulu, Finland.

31. T. Q. Duong, T. T. Duy, M. Matthaiou, T. Tsiftsis, G. K. Karagiannidis, "Cognitive cooperative networks in dual-hop relaying asymmetric fading channels, " IEEE Global Communications Conference (GLOBECOM), Atlanta, GA, December 2013.

30. P. C. Sofotasios, T. A. Tsiftsis, K. H. Van, S. Freear, L. R. Wilhelmsson, M. Valkama, "The ê-ì/IG Composite Statistical Distribution in RF and FSO Wireless Channels," to appear IEEE Vehicular Technology Conference (VTC 2013-Fall), Las Vegas, USA.  

29. P.  C. Sofotasios, T. A. Tsiftsis, M.  Ghogho, L. R. Wilhelmsson and M.Valkama, "The eta-mu/IG Distribution: A Novel Physical Multipath /Shadowing Fading, " in Proc. IEEE International Conference on Communications (ICC), Budapest, Hungary, June 2013., Budapest, Hungary.   

28. F. R. V. Guimaraes, D. B. da Costa, M.  Benjillali, T. A. Tsiftsis, and G. K. Karagiannidis, "Best Relay Selection in Cooperative Spectrum Sharing Systems with Multiple Primary Users," in Proc. IEEE International Conference on Communications (ICC), Budapest, Hungary, June 2013., Budapest, Hungary.    

27. K.  J.  Kim, T.  Q. Duong, T. A. Tsiftsis, and V.  N.  Q.Bao, "Cognitive Multihop Networks in Spectrum Sharing Environment with Multiple Licensed Users," in Proc. IEEE International Conference on Communications (ICC), Budapest, Hungary, June 2013., Budapest, Hungary.

    

26. F.  Yang, J.  Cheng, and T. A. Tsiftsis, "Free-Space Optical Communications with Generalized Pointing Errors, " in Proc. IEEE International Conference on Communications (ICC), Budapest, Hungary, June 2013, Budapest, Hungary.

25. M. Seyfi, S. Muhaidat, J. Liang and T. A.  Tsiftsis, "Noncoherent relay selection for bidirectional cooperative networks," IEEE Globecom 2012 Workshops (GC Wkshps), pp.105-110, 3-7 Dec. 2012.

24. Trung Q. Duong, H. A. Suraweera, T. A. Tsiftsis, H.-J. Zepernick, and A. Nallanathan. "OSTBCS in MIMO AF Relay Systems with Keyhole and Correlation Effects," in Proc. IEEE International Communications Conference (ICC’11), Kyoto, Japan, 2011.

23. K. J. Kim, T. A. Tsiftsis and G. K. Karagiannidis, "Average Spectral Efficiency of Opportunistic QRD-based Cyclic Prefixed Single-Carrier Cooperative Diversity Systems with Power Allocation," in Proc. IEEE Globecom 2010 - Wireless Communications Symposium, Miami, Florida, 6–10 December 2010. 

22. K. J. Kim, T. A. Tsiftsis and G. K. Karagiannidis, "Average Rate and Outage Probability of Cyclic Prefixed Single-Carrier Opportunistic Cooperative Diversity Systems," in Proc. IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2010), Istanbul, Turkey, 26 – 29 September 2010. 

21. T. Q. Duong, H-J. Zepernick, T. A. Tsiftsis, V. N. Q. Bao, "Performance Analysis of Amplify-and-Forward MIMO Relay Networks with Transmit Antenna Selection over Nakagami-m Channels," in Proc. IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2010), Istanbul, Turkey, 26 – 29 September 2010. 

20. T. A. Tsiftsis, Z. Hadzi-Velkov, G. K. Karagiannidis, and N. Zlatanov, "Average Relaying Utilization Metrics and Application in Diamond Cooperative Systems," in Proc. International Symposium on Wireless Pervasive Computing (IEEE ISWPC), Modena, Italy, 2010. 

19. T. Q. Duong, H-J. Zepernick, T. A. Tsiftsis, V. N. Q. Bao, "Amplify-and-Forward MIMO Relaying with OSTBC over Nakagami-m Fading Channels," in Proc. IEEE ICC 2010, Cape Town, South Africa.

18. H. Suraweera, T. A. Tsiftsis and G. K. Karagiannidis, "Effect of Feedback Delay on Downlink Amplify-and-Forward Relaying with Beamforming," in Proc. IEEE Globecom 2009, Hawaii, USA.

17. N. D. Chatzidiamantis, M. Uysal, T. A. Tsiftsis, and G. K. Karagiannidis, "EM-Based Maximum-Likelihood Sequence Detection for MIMO Optical Wireless Systems," in Proc. IEEE ICC'09, Dresden, Germany, June 2009.

16. T. A. Tsiftsis, H. G. Sandalidis, G. K. Karagiannidis, and M. Uysal, "FSO Links with Spatial Diversity over Strong Atmospheric Turbulence Channels," in Proc. IEEE IEEE International Conference on Communications (ICC’08), Beijing, China, May 2008.

15. D. S. Michalopoulos, G. K. Karagiannidis and T. A. Tsiftsis, "Introducing PHY-Layer Fairness in Amplify and Forward cooperative diversity systems," in Proc. IEEE International Conference on Communications 2007 (ICC'07), 24-27 June 2007, Glasgow, Scotland, U.K.

14. P. S. Bithas, N. C. Sagias, T. A. Tsiftsis, and G. K. Karagiannidis, "Products and ratios of two Gaussian class correlated Weibull random variables," in Proc. The 12th International Conference on Applied Stohastic Models and Data Analysis (ASMDA 2007), Chania, Crete, Greece, May 2007.

13. P. S. Bithas, N. C. Sagias, T. A. Tsiftsis, and George K. Karagiannidis, "Distributions involving correlated generalized gamma variables," in Proc. The 12th International Conference on Applied Stohastic Models and Data Analysis (ASMDA 2007), Chania, Crete, Greece, May 2007.

12. D. S. Michalopoulos, G. K. Karagiannidis, T. A. Tsiftsis, and R. K. Mallik, "An optimized user selection method for cooperative diversity systems," in Proc. IEEE Global Telecommunications Conference (GLOBECOM '06), 28 Nov. - 1 Dec. 2006, San Fransisco, USA.

11. T. A. Tsiftsis, H. G. Sandalidis, G. K. Karagiannidis and N. C. Sagias, "Multihop Free-Space Optical Communications Over Strong Turbulence Channels," in Proc.  IEEE International Conference on Communications 2006 (ICC'06), 11-15 June 2006, Turkey.

10. D. S. Michalopoulos, G. K. Karagiannidis and T. A. Tsiftsis, "New results for wireless multihop diversity systems," in Proc. of the 12th European Wireless Conference (EW2006), April 2-5, 2006, Athens, Greece.

9. L.-C. Siafara, D. S. Michalopoulos, T. A. Tsiftsis and  G. K. Karagiannidis,  "Regenerative versus non-regenerative relaying in cooperative diversity systems," in Proc. 15th IST Mobile & Wireless Communications Summit, 4-8 June, 2006, Mykonos, Greece.

8. T. A. Tsiftsis,  George K. Karagiannidis, Nikos C. Sagias and Stavros A. Kotsopoulos, "Performance of MRC diversity receivers over correlated Nakagami-m fading channels, " in Proc. Communication Systems, Networks and Digital Signal Processing (CSNDSP’06), 19-21 July 2006, Patras Univ. Conference Centre, Greece.

7. T. A. Tsiftsis, G. K. Karagiannidis and P. T. Mathiopoulos, "New results on the performance evaluation of the relay fading channel," in Proc. IEEE Vehicular Technology Conference (VTC S'06), May 2006, Melbourne, Australia.

6. N. C. Sagias and G. S. Tombras, G. K. Karagiannidis and T. A. Tsiftsis, "Equal-Gain Combining Receivers over Interference-Limited Nakagami-m Fading with Multiple Cochannel Interferers," in Proc. of the 12th National Conference on Communications, (NCC 2006), Indian Institute of  Technology, Delhi, India, Jan. 27-29, 2006.

5. G. K. Karagiannidis, T. A. Tsiftsis, and S. A. Kotsopoulos, «Performance of Broadband Multihop Networks with Cooperative Diversity over Fading Channels,” in Proc. 5th International Network Conference (INC 2005), 5 - 7 July, 2005, Island of Samos, Greece.

4. T. A. Tsiftsis, G. K. Karagiannidis, and S. A. Kotsopoulos, "Wireless Transmissions With Combined Gain Relays Over Fading Channels," in Proc. 4th Annual Mediterranean Ad Hoc Networking Workshop, June 21-24, 2005, i'lle de Porquerolles, France.

3. G. K. Karagiannidis, T. A. Tsiftsis, R. K. Mallik, N. C. Sagias, and S. A. Kotsopoulos, "Closed-Form Bounds of Multihop Relayed Communications in Nakagami-m Fading, "  in Proc. IEEE International Conference on Communications 2005 (ICC'05), 16-20 May 2005, Seoul, Korea.

2. G. K. Karagiannidis, D. A. Zogas, N. C. Sagias, T. A. Tsiftsis, and P. T. Mathiopoulos, "Multihop Communications with Fixed-Gain Relays over Generalized Fading Channels," in Proc. IEEE Global Telecom. Conference (GLOBECOM '04), December 2004, Dallas Texas, USA.

1. D. A. Zogas, G. K. Karagiannidis, N. C. Sagias, T. A. Tsiftsis, P. T. Mathiopoulos, and S. A. Kotsopoulos, "Dual Hop Wireless Communications over Nakagami Fading," in Proc. IEEE Vehicular Technology Conference, May 2004, Milan - Italy.

Workshops

Muhaidat, S., Uysal, M., Tsiftsis, T.A., Liang, J., Dianati, M., Abualhaol, I, «Advances in broadband single-carrier transmission techniques: Theory and applications (ABSCTT 2012)” Electrical & Computer Engineering (CCECE), 2012 25th IEEE Canadian Conference on , vol., no., pp.1-4, April 29 2012-May 2 2012.