LI Xiang

 

 

Li Xiang

Distinguished professor, doctoral supervisor, winner of Hubei Talent Program, and winner of CUG Hundred Talents Program

Office: Room 231, No. 2 Teaching Building     Email: lix@cug.edu.cn

Main Research Fields

1. Digital signal processing in optical fiber communication/optical wireless communication

2. Optical fiber sensing system and realization of real-time prototype

3. Application of machine learning in optical system.

Education and Work History

2019.11 – 2021.11: Senior Research Associate, Department of Electronic Engineering, University of Cambridge

2015.5 – 2019.10: Senior Engineer, State Key Laboratory of Optical Communication Technologies and Networks, Wuhan Research Institute of Posts and Telecommunications Co., Ltd.

2011.8 – 2016.5: PhD, Information Communication Research Center, Nanyang Technological University

2009.9 – 2011.6: Master, School of Optoelectronics Science and Engineering, Huazhong University of Science and Technology

2005.9 - 2009.6: Bachelor, School of Optoelectronics Science and Engineering, Huazhong University of Science and Technology

Admission Information

1. Digital signal processing algorithm and FPGA implementation in optical fiber communication (C/Matlab/Python/Verilog HDL)

2. Algorithm and FPGA implementation of optical fiber sensing system (C/C++/Verilog HDL)

3. Nonlinear digital signal processing algorithm based on machine learning (Matlab/Python)

4. The research group welcomes students with backgrounds in electronics, optics, computers, and other related scientific disciplines to join us.

5. We welcome undergraduate students who are passionate about programming and hardware design to participate in research exploration and practice in the group.

Scientific Research/Programs

1. Project supported by Hubei Major Science and Technology Innovation Program, 2016AAA012, “Research on ultra-low cost 100G metro network optical transmission system”, 2016/07-2018/06, RMB 1 million Yuan, concluded, project leader

2. General program of Natural Science Foundation of Hubei Province, 2016CFB302, “Research on low-cost optical interconnection technology based on nonlinear compensation”, 2016/01-2018/01, RMB 30,000Yuan, concluded, project leader

3. Youth Science Fund of the Natural Science Foundation of China, 61705171, “Research on the direct adjusting and direct inspecting optical fiber communication system based on nonlinear digital signal processing”, 2018/01-2020/12, RMB 210,000Yuan, concluded, project leader

4. Applied Basic Research Program of Wuhan City, 2017010201010100, “Research on the fusion technology of optical fiber transmission and quantum encryption”, 2017/10-2019/10, RMB 150,000Yuan, concluded, project leader

Awards

1. 2017: Youth Post Expert of FiberHome Telecommunication Technologies 

2. 2015: Scholarship for Self-financed Chinese Students (500 students worldwide)

3. 2011-2015: Graduate Scholarship of Nanyang Technological University

4. 2011-2012: Outstanding Master's Thesis of Hubei Province

Invited Presentations

1. X. Li, “Advanced nonlinear digital signal processing for short-reach applications,” Optical Fiber Communication Conference and Exposition (OFC) 2021, USA, June, 2021.

2. X. Li, “High capacity coherent UDWDM-PON in optical access networks,” International Conference on Optical Communications and Networks (ICOCN), Zhuhai, China, 2018.

3. X. Li, “High capacity coherent UDWDM-PON in optical access networks,” The Second Global Optical Information and Network Conference (GOINC), Beijing, China, 2018.

4. X. Li, “High capacity coherent UDWDM-PON in optical access networks,” OFCIO 2018, Jilin, China, 2018.

5. X. Li, “Independent component analysis based channel equalization in coherent optical fiber transmission systems,” Proc. of SPIE-OSA-IEEE, Asia Communications and Photonics (ACP), Guangzhou, China, 2017.

6. X. Li, “Nonlinearity compensation for optical direct detection systems in metro and access networks,” 7th International Multidisciplinary Conference on Optofluidics 2017 (IMCO), Singapore, 2017.

Publications

Journal publications as first author or corresponding author:

1. Yilun Wang†, Xiang Li†, Zhibin Jiang, Lei Tong, Wentao Deng, Xiaoyan Gao, Xinyu Huang, Hailong Zhou, Yu Yu, Lei Ye*, Xi Xiao*, and Xinliang Zhang*, “Ultrahigh-speed graphene-based optical coherent receiver,” Nature Communications, vol. 12, no. 1, pp. 1-7, 2021.

2. X. Li, Y. Liu, S. Fu, Y. Wang and Y. Qin, “Trellis shaping for fiber nonlinearity mitigation in coherent optical OFDM systems,” Journal of Lightwave Technology, vol. 39, no. 9, pp. 2809-2819, 2021.

3. Y. Wang, Z. Jiang, W. Deng, D. Zhou, Q. Yan, L. Chen, Y. Yu, J. Zhang, L. Ye*, X. Li*, X. Zhang*, “Ultra-compact high-speed polarization division multiplexing optical receiving chip enabled by Graphene-on-plasmonic slot waveguide photodetectors,” Advanced Optical Materials, vol. 9, no. 6, pp. 2001215, 2021.

4. K. Li, T. Huang, Z. Liu, Q. Liu, Y. Zhang, L. Liu, L. Li, and X. Li*, “Simple noise mitigation scheme for coherent optical DMT signal transmission system,” IEEE Access, vol. 8, pp. 166721-166729, 2020.

5. X. Li*, M. Luo, C. Li, C. Yang, H. Li, and S. Yu, “Direct detection of pilot-assisted PAM-4 signals with large phase noise tolerance,” Optics Letters, vol. 44, no. 22, pp. 5457-5460, 2019.

6. S. You, Y. Wang, W. Liu, Y. Shen, J. Pang, X. Li*, M. Luo, “400-Gb/s Single-sideband direct detection over 7-Core fiber with SSBI cancellation,” IEEE Photonics Technology Letters, vol. 31, no. 9, pp. 669-672, 2019.

7. C. Yang, M. Luo, C. Li, W. Li, and X. Li*, “Transmission of 64-Gb/s pilot-assisted PAM-4 signal over 1440-km SSMF with phase noise mitigation,” IEEE Photonics Journal, vol. 11, no. 1, pp.1-9, 2019.

8. M. Luo, J. Li, T. Zeng, L. Meng, L. Xue, L. Yi, and X. Li*, “Real-time coherent UDWDM-PON with dual-polarization transceivers in a field trial,” IEEE/OSA Journal of Optical Communications and Networking, vol. 11, no. 2, pp. A166-A173, 2019.

9. W. Zou, T. Huang, J. Yuan, D. Wang, X. Li*, and Z. Cheng*, “Modified constellation reshaping method for PAPR reduction of PDM CO-OFDM based on a SLM algorithm,” Applied Optics, vol. 58, no. 7, pp. 1800-1807, 2019.

10. Y. Qiu, M. Luo, Z. He, X. Li*, “Balanced detection of 100-Gb/s optical OFDM signals with SSBI cancellation based on fused-type fiber mode-selective coupler,” IEEE Photonics Journal, vol. 10, no. 5, pp.1-10, 2018.

11. J. Li, T. Zeng, L. Meng, M. Luo, Z. He, Z. Zhang, L. Yi, X. Li*, S. Yu, “Real-time bidirectional coherent ultra-dense TWDM-PON for 1000 ONUs,” Optics Express, vol. 26, no. 18, pp. 22976-22984, 2018.

12. H. Li, M. Luo, X. Li*, and S. Yu, “Spectrally efficient digital mobile fronthaul with discrete cosine transform and multi-band quantization,” Optics Letters, vol. 43, no. 20, pp. 5130-5133, 2018.

13. C. Li, M. Luo, and X. Li*, “4×128 Gb/s PDM-DMT signal transmission over 1440-km SSMF by DMLs based coherent transceiver,” Optics Express, vol. 26, no. 23, pp.30901-30910, 2018.

14. H. Li, X. Li*, and M. Luo, “Improving performance of differential pulse coding modulation based digital mobile fronthaul employing noise shaping,” Optics Express, vol. 26, no. 9, pp. 11407-11417, 2018.

15. X. Li, M. Luo, Y. Qiu, and Q. Yang. “Independent component analysis based digital signal processing in coherent optical fiber communication systems (invited paper)” Optics Communications, vol. 409, pp.13–22, 2018.

16. M. Li, X. Li*, C. Yang, Q. Yang, and S. Yu, "Experimental demonstration of indoor interfered visible light communication system employing successive interference cancellation", Chinese Optics Letters, vol. 15, no. 5, pp. 050604, 2017.

17. G. Gao, M. Luo, X. Li*, Y. Zhang, Q. Huang, Y. Wang, X. Xiao, Q. Yang and J. Xia*, “Transmission of 2.86 Tb/s data stream in silicon subwavelength grating waveguides,” Optics Express, vol. 25, no. 3, pp. 2918-2927, 2017.

18. X. Li, A. Alphones, W.D. Zhong, C. Yu and Z. Xu, “Improving performance of channel equalization in RSOA-based WDM-PON by QR decomposition,” Optics Express, vol. 23, no. 21, pp. 27299-27305, 2015.

19. X. Li, W.D. Zhong, A. Alphones and C. Yu, “Channel Equalization Using Independent Component Analysis in PDM-CO-OFDM,” IEEE Photonics Technology Letters, vol. 26, no. 5, pp. 497-500, 2014.

20. X. Li, W.D. Zhong, A. Alphones and C. Yu, “Time-Domain Adaptive Decision-Directed Channel Equalizer for RGI-DP-CO-OFDM,” IEEE Photonics Technology Letters, vol. 26, no. 3, pp. 285-288, 2014

21. X. Li, W.D. Zhong, A. Alphones and C. Yu, “Fiber Nonlinearity Tolerance of APSK Modulated DFT-S OFDM Systems,” IEEE Photonics Technology Letters, vol. 25, no. 23, pp. 2304-2307, 2013.

22. X. Li, W.D. Zhong, A. Alphones and C. Yu, “Pilot-Aided Channel Equalization in RGI-PDM-CO-OFDM Systems,” IEEE Photonics Technology Letters, vol. 25, no. 19, pp. 1924-1927, 2013.

23. X. Li, A. Alphones, W.D. Zhong and C. Yu, “Investigation of PMD in direct-detection optical OFDM with zero padding,” Optics Express, vol. 21, no. 18, pp. 20851-20856, 2013.

24. X. Li, W.D. Zhong, A. Alphones and C. Yu, “Channel Equalization in Optical OFDM Systems Using Independent Component Analysis,” Journal of Lightwave Technology, vol. 32, no. 18, pp. 3206-3214, 2014.

25. X. Li, J. Dong, Y. Yu and X. Zhang, “A Tunable Microwave Photonic Filter Based on an All-Optical Differentiator,” IEEE Photonics Technology Letters, vol. 23, no. 5, pp. 308-310, 2011.

26. X. Li, E. Xu, L. Zhou, Y. Yu, J. Dong and X. Zhang, “Microwave photonic filter with multiple taps based on single semiconductor optical amplifier,” Optics Communications, vol. 283, no. 5, pp. 3026-3029, 2010.

27. Y. Wang, Y. Zhang, Z. Jiang, W. Deng, X. Huang, Q. Yan, L. Chen, X. Li*, L.Ye, and X. Zhang, “128 Gbps NRZ and 224 Gbps PAM-4 signals reception in Graphene plasmonic PDM receiver,” Optical Fiber Communication Conference and Exposition (OFC) 2020, M1D.2, USA, March, 2020.

28. X. Dai, M. Luo and X. Li*, “Machine Learning Aided In-phase/Quadrature Skew and Imbalance Calibration for Coherent Optical Transmitters,” Optical Fiber Communication Conference and Exposition (OFC) 2019, W2A.44, USA, March, 2019.

29. C. Li, C. Yang, M.Luo, Z. He, X. Li* and S. Yu, “Direct Detection of Pilot-Assisted PAM Signals for DCI and Metro Networks,” Optical Fiber Communication Conference and Exposition (OFC) 2019, Th2A.30, USA, March, 2019.

30. M. Luo, D. Wu, W. Li, T. Zeng, L. Zhou, L. Meng, Z. He, C. Li, and X. Li*, “Demonstration of Bidirectional Real-Time 100 Gb/s (4×25 Gb/s) Coherent UDWDM-PON with Power Budget of 44 dB,” Optical Fiber Communication Conference and Exposition (OFC) 2019, Th3F.2, USA, March, 2019.

31. X. Li, M. Luo, T. Zeng, L. Yi, J. Li, L. Meng and S. Yu, “Coherent Bidirectional UDWDM-PON for 1000 ONUs with Real-Time Digital Signal Processing,” European Conference on Optical Communication (ECOC) 2018, Tu1B.3, Roma, Sep., 2018

32. M. Luo, F. Gao, X. Li*, Z. He, and S. Fu, “Transmission of 4×50-Gb/s PAM-4 signal over 80-km single mode fiber using neural network,” Optical Fiber Communication Conference and Exposition (OFC) 2018, M2F.2, USA, March, 2018.

33. M. Luo, T. Zeng, L. Yi, J. Li, X. Li*, Q. Yang, and L. Xue, “Demonstration of 10-Gb/s, 5-GHz spaced coherent UDWDM-PON with digital signal processing in real-time,” Optical Fiber Communication Conference and Exposition (OFC) 2018, M3B.3, USA, March, 2018.

34. Y. Qiu, X. Li*, M. Luo, and Q. Yang, “SSBI-Free 100Gb/s Direct Detection Based on Fused-Type Mode-Selective Fiber Coupler”, European Conference on Optical Communication (ECOC) 2017, P1.SC4.59, Sweden, Sep., 2017.

35. Y. Qiu, X. Li*, M. Luo, J. Xu, Q. Yang, S. Yu, and S. You, “Mode-selective wavelength conversion of multicarrier, multilevel modulation signals in a multimode silicon waveguide,” Optical Fiber Communication Conference and Exposition (OFC) 2017, M3F.7, USA, 2017.

36. X. Li, S. Zhou, F. Gao, M. Luo, Q. Yang, Q. Mo, Y. Yu, and S. Fu, “4×28 Gb/s PAM4 Long-Reach PON Using Low Complexity Nonlinear Compensation,” Optical Fiber Communication Conference and Exposition (OFC) 2017, M3H.4, USA, 2017.

37. 37.X. Li, S. Zhou, H. Ji, M. Luo, Q. Yang. L. Yi. R. Hu. C. Li. S. Fu. A. Alphones, W.Zhong; and C. Yu, “Transmission of 4×28-Gb/s PAM-4 over 160-km Single Mode Fiber using 10G-Class DML and Photodiode” , Optical Fiber Communication Conference and Exposition (OFC) 2016 W1A.5, USA, 2016.  

38. X. Li, W.D. Zhong, A. Alphones, C. Yu, M. Luo, R. Hu and Q. Yang, “Experimental demonstration of independent component analysis based channel equalization in multiband coherent optical PDM-OFDM,” European Conference on Optical Communication (ECOC) 2015, Paper P.3.9, pp. 1-3, Valencia, Spain, Sep. 27-Oct. 1, 2015.

39. X. Li, W.D. Zhong, A. Alphones and C. Yu, “Channel Equalization Based on Independent Component Analysis for Coherent Optical PDM-OFDM,” Optical Fiber Communication Conference and Exposition (OFC) 2014, Paper Tu3G.2, pp. 1-3, San Francisco, California, March 9-13, 2014.

Patents

1. Li Xiang, “A few-mode optical fiber transmission system and its digital signal recovery method”, 201510897002.X

2. Li Xiang, “Polarization-independent direct detection system and method based on light intensity modulation signal”, 201510897504.2

3. Li Xiang, Yang Qi, Luo Ming, Hu Rong, Li Si, “Adaptive optical fiber communication nonlinear equalization method and system based on direct detection”, 201610008077.2

4. Li Xiang, “An ADO-OFDM channel equalization method, device and ADO-OFDM system”, 201711376059.0

5. Li Xiang, Luo Ming, “Real number nonlinear equalization method and device applied to coherent optical fiber communication system”, 201811408696.6

6. Wang Yuanxiang, Li Xiang, “Polarization-independent self-coherent orthogonal frequency division multiplexing optical fiber transmission system and transmission method”, 201510903299.6

7. Zhang Xu, Li Xiang, Wang Yuanxiang, Yang Qi, Yu Shaohua, “Channel recovery method for coherent optical orthogonal frequency division multiplexing system with implicit training sequences”, 201510933232.7

8. He Zhixue, Li Xiang, Yang Qi, “Self-correlated zero-difference detection device and method based on mode multiplexed optical communication system”, 201510963411.5

9. Liu Ziqing, Li Xiang, Hu Rong, Yang Qi, Yu Shaohua, “OFDM signal unicast and multicast optical network structure based on constant envelope”, 201510989670.5

10. Li Jie, Zeng Tao, Li Xiang, Yang Qi, “A parallel CMA simplified implementation method for coherent optical communication systems”, 201510996036.4

11. Yang Qi, You Shanhong, Li Xiang, Luo Ming, Yu Shaohua, “Multi-core fiber-based DD OFDM system and method for eliminating SSBI”, 201710284088.8

12. Huang Tianye, Ren Kaixuan, Li Xiang, “A timing synchronization method, apparatus and storage device in the coherent optical OFDM communication system”, 201711174166.5

13. Luo Ming, Li Xiang, Yang Qi, “Optical fiber communication system and method for converting multiple NRZ optical signals to single multi-level optical signals”, 201711385821.1

14. Li Si, Li Xiang, Yang Qi, “A transmission system for dual polarization optical signals”, 201711409244.5

15. Luo Ming, Li Xiang, “UDWDM-PON downlink network transmission system”, 201810184667.X

16. Li Si, Li Xiang, Luo Ming, “Optical signal receiving device, method and coherent optical transmission system with the device”, 201810515132.6

17. Dai Xiaoxiao, Li Xiang, “A noise compensation method and system for optical communication system”, 201811101683.4

18. Zhang Xu, Zeng Tao, Li Jie, Meng Lingheng, Li Xiang, Yu Shaohua, “A CMA-based signal equalization method and system”, 201811362088.6

19. Wang Xi, Li Xiang, Luo Ming, “A polarization-independent coherent optical access method and system”, 201811399929.0

20. Dai Xiaoxiao, Li Xiang, “An optical IQ modulator parameter adjustment method and system”, 201811447417.7

21. He Zhixue, Luo Ming, Li Xiang, Yu Shaohua, “An ultra-dense wavelength division multiplexing passive fiber optic network transmission system and transmission method”, 201811468319.1

22. Li Si, Yang Chao, Li Xiang, Yu Shaohua, “The system and method for direct detection of intensity modulation based on carrier support”, 201811625121.X