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Dr Tianhua Xu

Photo_Tianhua Blank

Assistant Professor

Connected Systems Group (A419)

Electrical and Electronic Stream

School of Engineering

University of Warwick

Coventry, United Kingdom

CV4 7AL

Tel: +44-(0)24765 28698

Fax: +44-(0)2476418922

Email: tianhua.xu@warwick.ac.uk

   

 

Biography

Dr. Tianhua Xu is currently an Assistant Professor in the Connected Systems Group, School of Engineering, at University of Warwick, UK. He is also an Honorary Lecturer in the Optical Networks Group at University College London, UK. He received his Ph.D. degree in School of Information and Communication Technology, at Royal Institute of Technology (KTH), Sweden, 2012. Following this, he worked as a Postdoctoral Research Fellow at KTH and RISE Acreo and a visiting Postdoctoral Research Fellow at Technical University of Denmark (DTU) from 2012 to 2013, as well as a Senior Research Fellow at University College London (UCL) from 2013 to 2017.

He joined University of Warwick as an Assistant Professor in 2017. His current research interests include optical communication networks, digital signal processing, information theory and nonlinear fiber optics. Dr. Xu is currently the Chair of Optics in Digital Systems Technical Group in Optical Society of America, and the TPC co-chair/member of over 20 IEEE conferences (e.g. GLOBECOM, ICC, CLEO-PR). He has published over 90 journal and conference papers (including 20 invited), 1 invited book chapter and 4 patents.


Research Topics

Physical Layer Properties in Linear and Nonlinear Optical Communication Networks

Signal Processing and Machine Learning in Optical Communication Systems and Networks

Transceiver Design for Linear and Nonlinear Optical Communication Networks

Information and Coding Theory for Nonlinear Optical Channels and Networks

Optical Fibre Sensing and Optical Fibre Sensor Networks


Publications

View All Publications (Over 90 papers, including 20 invited, 1000 citations, h-index 19)
Selected Journal Papers

1. Z. Li, M. S. Erkılınç, K. Shi, E. Sillekens, L. Galdino, T. Xu, B. C. Thomsen, P. Bayvel, Robert I. Killey, “Digital linearization of direct-detection transceivers for spectrally-efficient 100 Gb/s/λ WDM metro networking,” [IEEE/OSA] Journal of Lightwave Technology, Vol.36(1), 27-36, 2018. (Invited, IF: 3.671)

2. Z. Li, M. S. Erkılınç, K. Shi, E. Sillekens, L. Galdino, T. Xu, B. C. Thomsen, P. Bayvel, Robert I. Killey, “Spectrally-efficient 168 Gb/s WDM 64-QAM single-sideband Nyquist-subcarrier modulation with Kramers-Kronig based direct-detection receivers,” [IEEE/OSA] Journal of Lightwave Technology, Vol.36(6), 1340-1346, 2018. (Invited, IF: 3.671)

3. T. Xu, B. Karanov, N. A. Shevchenko, D. Lavery, G. Liga, R. I. Killey, P. Bayvel, “Digital nonlinearity compensation in high-capacity optical communication systems considering signal spectral broadening effect”, [Nature] Scientific Reports, Vol.7, 12986, 2017. (IF: 4.259)

4. T. Xu, N. A. Shevchenko, D. Lavery, D. Semrau, G. Liga, A. Alvarado, R. I. Killey, P. Bayvel, “Modulation format dependence of digital nonlinearity compensation performance in optical fibre communication systems,” [OSA] Optics Express, Vol.25(4), 3311-3326, 2017. (IF: 3.307)

5. D. Semrau, T. Xu, N. A. Shevchenko, M. Paskov, A. Alvarado, R. I. Killey, P. Bayvel, “Achievable information rates estimates in optically amplified transmission systems using nonlinearity compensation and probabilistic shaping,” [OSA] Optics Letters, Vol.41(21), 121-124, 2017. (IF: 3.416)

6. N. A. Shevchenko, T. Xu, D. Lavery, G. Liga, R. I. Killey, P. Bayvel, “Modeling of nonlinearity-compensated optical communication systems considering second-order signal-noise interactions”, [OSA] Optics Letters, Vol.42(17), 3351-3354, 2017. (IF: 3.416)

7. B. Karanov, T. Xu, N. A. Shevchenko, D. Lavery, R. I. Killey, P. Bayvel, “Span length and information rate optimisation in optical transmission systems using single-channel backpropagation,” [OSA] Optics Express, Vol.25(21), 25353-25362, 2017. (IF: 3.307)

8. P. Nie, D. Jia, C. Du, H. Zhang, T. Xu, T. Liu, “Method based on fast Fourier transform for calculating conical refraction of beams with non-circular symmetry,” [IEEE] Photonics Journal, Vol.9(2), 6500707, 2017. (IF: 2.291)

9. P. Bayvel, R. Maher, T. Xu, G. Liga, N. A. Shevchenko, D. Lavery, A. Alvarado, R. I. Killey, “Maximising the optical network capacity,” [Royal Society] Philosophical Transactions of the Royal Society A, Vol.374(2062), 20140440, 2016. (Invited, IF: 2.970)

10. K. Liu, M. Tian, J. Jiang, J. An, T. Xu, C. Ma, L. Pan, T. Wang, Z. Li, W. Zheng, M. Xue, F. Wu, T. Liu, “An Improved positioning algorithm in a long-range asymmetric perimeter security system,” [IEEE/OSA] Journal of Lightwave Technology, Vol.34(22), 5278-5283, 2016. (IF: 3.671)

11. T. Xu, G. Liga, D. Lavery, B. C. Thomson, S. J. Savory, R. I. Killey, P. Bayvel, “Equalization enhanced phase noise in Nyquist-spaced superchannel transmission systems using multi-channel digital back-propagation,” [Nature] Scientific Reports, Vol.5, 13990, 2015. (IF: 4.259)

12. R. Maher, T. Xu, L. Galdino, M. Sato, A. Alvarado, K. Shi, S. J. Savory, B. C. Thomsen, R. I. Killey, P. Bayvel, “Spectrally shaped DP-16QAM super-channel transmission with multi-channel digital back propagation,” [Nature] Scientific Reports, Vol.5, 08214, 2015. (IF: 4.259)

13. G. Liga, T. Xu, A. Alvarado, R. I. Killey, P. Bayvel, “On the performance of multichannel digital backpropagation in high-capacity long-haul optical transmission,” [OSA] Optics Express, Vol.22(24), 30053-30062, 2014. (IF: 3.307)

14. G. Jacobsen, T. Xu, S. Popov, S. Sergeyev, “Study of EEPN mitigation using modified RF pilot and Viterbi-Viterbi based phase noise compensation,” [OSA] Optics Express, Vol.21(10), 12351-12362, 2013. (IF: 3.307)

15. H. Zhang, S. Wang, Y. Gong, T. Liu, T. Xu, D. Jia, Y. Zhang, “A quantitative robustness evaluation model for optical fiber sensor networks,” [IEEE/OSA] Journal of Lightwave Technology, Vol.31(8), 1240-1246, 2013. (IF: 3.671)

16. G. Jacobsen, T. Xu, S. Popov, J. Li, A. T. Friberg, Y. Zhang, “EEPN and CD study for coherent optical nPSK and nQAM systems with RF pilot based phase noise compensation,” [OSA] Optics Express, Vol.20(8), 8862-8870, 2012. (IF: 3.307)

17. T. Xu, G. Jacobsen, S. Popov, J. Li, A. T. Friberg, Y. Zhang, “Analytical estimation of phase noise influence in coherent transmission system with digital dispersion equalization,” [OSA] Optics Express, Vol.19(8), 7756-7768, 2011. (IF: 3.307)

18. G. Jacobsen, T. Xu, S. Popov, J. Li, A. T. Friberg, Y. Zhang, “Receiver implemented RF pilot tone phase noise mitigation in coherent optical nPSK and nQAM systems,” [OSA] Optics Express, Vol.19(15), 14487-14494, 2011. (IF: 3.307)

19. T. Xu, G. Jacobsen, S. Popov, J. Li, E. Vanin, K. Wang, A. T. Friberg, Y. Zhang, “Chromatic dispersion compensation in coherent transmission system using digital filters,” [OSA] Optics Express, Vol.18(15), 16243-16257, 2010. (IF: 3.307)

Invited Conference Talks

1. T. Xu, B. Karanov, N. A. Shevchenko, G. Liga, D. Lavery, Z. Li, R. I. Killey, P. Bayvel, “Digital nonlinearity compensation in optical fibre communications considering spectral broadening effect”, [IEEE] International Conference on Advanced Infocomm Technology (ICAIT), Stockholm, Sweden, 2018.

2. T. Xu, T. Xu*, I. Darwazeh, “Deep learning for interference cancellation in non-orthogonal signal based optical communication systems”, [IEEE] Progress in Electromagnetics Research Symposium (PIERS), Toyama, Japan, 2018.

3. T. Xu, N. A. Shevchenko, B. Karanov, G. Liga, D. Lavery, R. I. Killey, P. Bayvel, “Digital nonlinearity compensation in high-capacity optical fibre communication systems: performance and optimisation,” [IEEE] Advances in Wireless and Optical Communications (RTUWO), Riga, Latvia, 67-72, 2017.

4. T. Xu, G. Jacobsen, S. Popov, “Carrier phase estimation and nonlinearity compensation in optical communication systems using advanced modulation formats,” [SPIE] International Conference on Wireless and Optical Communications (ICWOC), Singapore, 2017.

5. T. Xu, P. Bayvel, T. Liu, Y. Zhang, G. Jacobsen, J. Li, S. Popov, “Carrier phase estimation in dispersion-unmanaged optical transmission systems,” [IEEE] Advanced Information Technology, Electronic and Automation Control Conference (IAEAC), 1860-1864, Chongqing, China, 2017.

6. T. Xu, G. Jacobsen, S. Popov, T. Liu, Y. Zhang, P. Bayvel, “Analytical estimation in differential optical transmission systems influenced by equalization enhanced phase noise,” [IEEE] Progress in Electromagnetics Research Symposium (PIERS), 4844-4848, Shanghai, China, 2016.

7. T. Xu, G. Jacobsen, S. Popov, J. Li, T. Liu, Y. Zhang, “Closed-form expression of one-tap normalized LMS carrier phase recovery in optical communication systems,” [SPIE] International Conference on Wireless and Optical Communications (ICWOC), Vol.9902, 990203, Beijing, China, 2016.

8. T. Xu, G. Liga, N. A. Shevchenko, R. I. Killey, P. Bayvel, “Receiver-based strategies for mitigating nonlinear distortion in high-speed optical communication systems,” Tyrrhenian International Workshop on Digital Communications, [IEEE/OSA] Photonics in Switching, P2.2, Florence, Italy, 2015.

9. T. Xu, G. Liga, N. A. Shevchenko, A. Alvarado, M. E. McCarthy, S. T. Le, A. D. Ellis, R. I. Killey, S. K. Turitsyn, P. Bayvel, “Overcoming fibre nonlinearities to enhance the achievable transmission rates in optical communication systems,” [IEEE/OSA] Asia Communications and Photonics Conference (ACP), Workshop3, Hong Kong, 2015.

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News & Reports

Invited Talk in IEEE ICAIT 2018

(Stockholm, Sweden)

Invited Talk in IEEE PIERS 2018

(Toyama, Japan)

PhD Positions

PhD/Postdoc Opens

   
   
Collaborations

UCL

KTH

RISE Acreo