Browsing Research publications by Author "Tsokanos, Athanasios"

Now showing items 1-11 of 11

    • Artificial Neural Network Nonlinear Equalizer for Coherent Optical OFDM 

      M, Jarajreh; Giacoumidis, E; Aldaya, I; Le, S.T.; Tsokanos, Athanasios; Ghassemlooy, Z.; Doran , N.J. (2015-02-15)
      We propose a novel low-complexity artificial neural network (ANN)-based nonlinear equalizer (NLE) for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) and compare it with the recent inverse Volterra-series ...

    • Dual-polarization multi-band optical OFDM transmission and transceiver limitations for up to 500 Gb/s uncompensated long-haul links 

      Giacoumidis, Elias; Abdel-karim Jarajreh, Mutsam; Sygletos, Stylianos; Thai Le, Son; Farjady, Farsheed; Tsokanos, Athanasios; Hamié, Ali; Pincemin, Erwan; Jaouën, Yves; D Ellis, Andrew; Doran, NJ (2014-05-05)
      A number of critical issues for dual-polarization single- and multi-band optical orthogonal-frequency division multiplexing (DP-SB/MB-OFDM) signals are analyzed in dispersion compensation fiber (DCF)-free long-haul links. ...

    • Effective handling of nonlinear distortions in CO-OFDM using affinity propagation clustering 

      Wei, Jinlong; Giacoumidis, Elias; Zhou, Ji; Jarajreh, Mutsam A.; Li, Shi; Aldaya, Ivan; Lu, Yandong; Tsokanos, Athanasios; Richter, Andre (2022-04-22)
      We experimentally demonstrate a system-agnostic and training-data-free nonlinearity compensator, using affinity propagation (AP) clustering in single- and multi-channel coherent optical OFDM (CO-OFDM) for up to 3200 km ...

    • Harnessing machine learning for fiber-induced nonlinearity mitigation in long-haul coherent optical OFDM 

      Giacoumidis, Elias; Yi-lin; Wei, Jinlong; Aldaya, Ivan; Tsokanos, Athanasios; Barry, Liam (2018-12-20)
      Coherent optical orthogonal frequency division multiplexing (CO-OFDM) has attracted a lot of interest in optical fiber communications due to its simplified digital signal processing (DSP) units, high spectral-efficiency, ...

    • Multi-Link Failure Effects on MPLS Resilient Fast-Reroute Network Architectures 

      Gray, Wayne; Tsokanos, Athanasios; Kirner, Raimund (Institute of Electrical and Electronics Engineers (IEEE), 2021-06-03)
      MPLS has been in the forefront of high-speed Wide Area Networks (WANs), for almost two decades [1, 12]. The performance advantages in implementing Multi-Protocol Label Switching (MPLS) are mainly its superior speed based ...

    • Performance modelling and traffic characterisation of optical networks 

      Mouchos, Harry; Tsokanos, Athanasios; Kouvatsos, Demetres D. (Springer Nature, 2011)
      A review is carried out on the traffic characteristics of an optical carrier's OC-192 link, based on the IP packet size distribution, traffic burstiness and self-similarity. The generalised exponential (GE) distribution ...

    • Proceedings of Abstracts, School of Physics, Engineering and Computer Science Research Conference 2022 

      Amafabia, Daerefa-a; Asimea, Laurel; Bally, John; Baran, Anthony; Boies, Adam; Borjali, Amirhossein; Bosomworth, Chloe; Burningham, Ben; Chaliasou, Napoleana-Anna; CHEN, Yong Kang; Cheong, Yuen Ki; Chizari, Mahmoud; Chung, Etelka; Coppin, Kristen; David-West, Opukuro; Dennler, Nik; Dhakal, Hom; Dimov, Nikolay; Dmitruk, Emil; Donald, Allen; Drix, Damien; Dzib, Sergio A.; Eltaweel, Mahmoud; Fadlelseed, Sajid; Farahani, Atena; Felix, Adrian; Foat, Tim; Forbrich, Jan; Franco, Maximilien; Gaarn, Joesphine; Garratt, Tracy; Geach, Jim; Ghias, Narges; Ghita, Adrian; Giannetti, Niccolo; Vargas-Gonzalez, Jaime; Greenaway, Richard; Haritos, George; Hatami, Sara; Haydock, David; Helian, Na; Herfatmanesh, Mohammad Reza; Herve, Jean-Baptiste; Hesse, Evelyn; Korani, Hossein; Hosseini, Vahid; Hu, Wei; Hubbard, Thomas; Inal, Jameel; Irigo, Patrick; Ismail, Sikiru O.; Jepleting, Fiona; Ji, Wei; Johnston, Ian; Jombo, Gbanaibolou; Kadir, Shabnam; Kalyvas, Christos; Kamran, Syed Muhammad; Kanellopoulos, Antonios; Kiflay, Aklil Zenebe; Kirner, Raimund; Knox, Kerry; Kobayashi, Chiaki; Kumar, Dhirendra; Kumar, Ritesh; Lane, Peter; Lekkala, Himayasri; Lewis, Andrew; Li, Liang; Luo, Qi; Madani, Hossein; Mallet, Colin; Maruthupandian, Surya; Mathen, Elizabeth Reeja; Matousek, Pavel; McCool, Simon; McGarry, James C.; Menon, Catherine; Metzner, Christoph; Miles, Rachael E. H.; Moeinnia, Hadi; Moggridge, Paul; Mohseni, Mahdi; Montalvão, Diogo; Moraby, Mohammad Najeeb; Murnane, Darragh; Norgate, Marc; Nourani, Amir; Prasad, Kumar Shantanu; Ramalingam, Soodamani; Rastogi, Shavika; Reid, Jonathan P.; Ren, Guogang; Rivilla, Victor M.; Saidpour, Hossein; Saito, Kiyoshi; Sajedi, Seyed Amir Hossein; Salge, Christoph; Samararatne, Samadhi; Schmuker, Michael; Sensoy, Elif; Shriram, Ajay; Singh, Harpreet; Sorouraddin, Yasser; Steuber, Volker; Stone, Nicholas; Sun, Yi; Sureddi, Roopesh; Sutton, Samuel; Thomas, Peter; Timms, Andrew R; Tiwari, P. R.; Tsokanos, Athanasios; Vadalia, Mansukhlal; Yaqoob, Muhammad; Yulianto, Muhamad; Zheng, Minghua (University of Hertfordshire, 2022-11-04)
      The present proceedings record the abstracts submitted and accepted for presentation at SPECS 2022, the second edition of the School of Physics, Engineering and Computer Science Research Conference that took place online, ...

    • Quantum Randomness in Cryptography—A Survey of Cryptosystems, RNG-Based Ciphers, and QRNGs 

      Saini, Anish; Tsokanos, Athanasios; Kirner, Raimund (2022-07-27)
      Cryptography is the study and practice of secure communication with digital data and focuses on confidentiality, integrity, and authentication. Random number generators (RNGs) generate random numbers to enhance security. ...

    • Reduction of Nonlinear Inter-Subcarrier Intermixing in Coherent Optical OFDM by a Fast Newton-based Support Vector Machine Nonlinear Equalizer 

      Mhatli, Sofien; Stephens, Marc F. C.; Tsokanos, Athanasios; Wei, Jinlong; McCarthy, Mary E.; Doran, Nick J.; Ellis , Andrew D. (2017-06-15)
      A fast Newton-based support vector machine (N-SVM) nonlinear equalizer (NLE) is experimentally demonstrated, for the first time, in 40 Gb/s 16-quadrature amplitude modulated coherent optical orthogonal frequency division ...

    • Unsupervised Support Vector Machines for Nonlinear Blind Equalization in CO-OFDM 

      Giacoumidis, Elias; Tsokanos, Athanasios; Ghanbarisabagh, M.; Mhatli, S.; Barry, L. P. (2018-06-15)
      A novel blind nonlinear equalization (BNLE) technique based on the iterative re-weighted least square is experimentally demonstrated for single- and multi-channel coherent optical orthogonal frequency-division multiplexing. ...

    • Volterra-Based Reconfigurable Nonlinear Equalizer for Coherent OFDM 

      Giacoumidis, Elias; Aldaya, Ivan; Jarajreh, Mutsam A; Tsokanos, Athanasios; Thai Le, Son; Farjady, Farsheed; Jaouën, Yves; Ellis, Andrew D; Doran, Nick J (2014-07-15)
      A reconfigurable nonlinear equalizer (RNLE) based on inverse Volterra series transfer function is proposed for dual-polarization (DP) and multiband coherent optical orthogonal frequency-division multiplexing (OFDM) signals. ...