A Comparative Survey of Coding, Multiplexing, and Equalization Techniques Used in Coherent Optical Fiber Communications

John Martin Ladrido, Emmanuel Trinidad, James Agustin Molina, Lawrence Materum


As the world advances into 5G networks, significant scientific research accomplishments are being conducted for a communication system that could further enhance the current limit of data transmission capacity. Currently, the communication systems with the highest data rate are optical fiber systems. Due to the recent advancement of coherent optical fiber communications by exploiting time, wavelength, phase, amplitude, polarization, and space, optical engineering can break the petabit barrier data rate. Thus, coherent optical fiber communications is a hot topic due to its very high data rate that could be applied or a requirement in 5G and big data analytics. This paper focuses on a comparative survey of the current applied fundamental techniques in fiber communication channels. These fundamental techniques that could be further studied and exploited to increase the bandwidth performance, decrease the error rate and energy consumption are coding, multiplexing, and equalization. At the end of this paper, a comparative result is discussed to explain the difference among the current techniques in the literature for the optical engineering community to improve collective coding, multiplexing, and equalization in coherent fiber systems.


Coherent optical communications; coding; multiplexing; equalization.

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L. N. Binh, Optical fiber communication systems with Matlab and Simulink models; 2nd ed. Hoboken, NJ: CRC Press, 2014 [Online]. Available: https://cds.cern.ch/record/2024949.

K. Kikuchi, “Fundamentals of Coherent Optical Fiber Communications,†Journal of Lightwave Technology, vol. 34, no. 1, pp. 157–179, Jan. 2016, doi: 10.1109/JLT.2015.2463719.

X. Liu, “Evolution of Fiber-Optic Transmission and Networking toward the 5G Era,†iScience, vol. 22, pp. 489–506, Dec. 2019, doi: 10.1016/j.isci.2019.11.026.

D. A. Morero, M. A. Castrillón, A. Aguirre, M. R. Hueda, and O. E. Agazzi, “Design Tradeoffs and Challenges in Practical Coherent Optical Transceiver Implementations,†Journal of Lightwave Technology, vol. 34, no. 1, pp. 121–136, Jan. 2016, doi: 10.1109/JLT.2015.2470114.

F. Fresi et al., “Advances in optical technologies and techniques for high capacity communications,†IEEE/OSA Journal of Optical Communications and Networking, vol. 9, no. 4, pp. C54–C64, Apr. 2017, doi: 10.1364/JOCN.9.000C54.

A. Amari, O. A. Dobre, R. Venkatesan, O. S. S. Kumar, P. Ciblat, and Y. Jaouën, “A Survey on Fiber Nonlinearity Compensation for 400 Gb/s and Beyond Optical Communication Systems,†IEEE Communications Surveys Tutorials, vol. 19, no. 4, pp. 3097–3113, Fourthquarter 2017, doi: 10.1109/COMST.2017.2719958.

Q. Tan, Z. Wang, A. Yang, and P. Guo, “Coherent Optical Sampling Based Method for Monitoring Optical Signal to Noise Ratio of High Speed Optical Fiber Communication Systems,†in 2019 7th International Conference on Information, Communication and Networks (ICICN), 2019, pp. 135–139, doi: 10.1109/ICICN.2019.8834945.

I. Tomkos, A. Tolmachev, A. Agmon, M. Meltsin, T. Nikas, and M. Nazarathy, “Low-Cost/Power Coherent Transceivers for Intra-Datacenter Interconnections and 5G Fronthaul Links,†in 2019 21st International Conference on Transparent Optical Networks (ICTON), 2019, pp. 1–5, doi: 10.1109/ICTON.2019.8840195.

C. Jing, X. Tang, X. Zhang, L. Xi, and W. Zhang, “Time domain synchronous OFDM system for optical fiber communications,†China Communications, vol. 16, no. 9, pp. 155–164, Sep. 2019, doi: 10.23919/JCC.2019.09.011.

J. Zhang et al., “Functional-Link Neural Network for Nonlinear Equalizer in Coherent Optical Fiber Communications,†IEEE Access, vol. 7, pp. 149900–149907, 2019, doi: 10.1109/ACCESS.2019.2947278.

H. Zhang, Z. Yu, L. Shu, Z. Wan, Y. Zhao, and K. Xu, “Fiber Nonlinearity Equalizer using MLP-ANN for Coherent Optical OFDM,†in 2019 18th International Conference on Optical Communications and Networks (ICOCN), 2019, pp. 1–3, doi: 10.1109/ICOCN.2019.8934433.

F. Musumeci et al., “An Overview on Application of Machine Learning Techniques in Optical Networks,†IEEE Communications Surveys Tutorials, vol. 21, no. 2, pp. 1383–1408, Secondquarter 2019, doi: 10.1109/COMST.2018.2880039.

A. Tychopoulos, O. Koufopavlou, and I. Tomkos, “FEC in optical communications - A tutorial overview on the evolution of architectures and the future prospects of outband and inband FEC for optical communications,†IEEE Circuits and Devices Magazine, vol. 22, no. 6, pp. 79–86, Nov. 2006, doi: 10.1109/MCD.2006.307281.

G. Tzimpragos, C. Kachris, I. B. Djordjevic, M. Cvijetic, D. Soudris, and I. Tomkos, “A Survey on FEC Codes for 100 G and Beyond Optical Networks,†IEEE Communications Surveys Tutorials, vol. 18, no. 1, pp. 209–221, Firstquarter 2016, doi: 10.1109/COMST.2014.2361754.

A. Leven and L. Schmalen, “Status and Recent Advances on Forward Error Correction Technologies for Lightwave Systems,†Journal of Lightwave Technology, vol. 32, no. 16, pp. 2735–2750, Aug. 2014, doi: 10.1109/JLT.2014.2319896.

I. B. Djordjevic, “On Advanced FEC and Coded Modulation for Ultra-High-Speed Optical Transmission,†IEEE Communications Surveys Tutorials, vol. 18, no. 3, pp. 1920–1951, thirdquarter 2016, doi: 10.1109/COMST.2016.2536726.

L. Beygi, E. Agrell, J. M. Kahn, and M. Karlsson, “Coded Modulation for Fiber-Optic Networks: Toward better tradeoff between signal processing complexity and optical transparent reach,†IEEE Signal Processing Magazine, vol. 31, no. 2, pp. 93–103, Mar. 2014, doi: 10.1109/MSP.2013.2290805.

D. Wang, S. Zhang, and Q. Li, “WDM transmission system based on coherent optical OFDM and its performance analysis,†in 2019 IEEE 3rd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC), 2019, pp. 2157–2161, doi: 10.1109/ITNEC.2019.8729044.

S. Pradhan, B. Patnaik, and R. Panigrahy, “Hybrid Multiplexing (OTDM/WDM) Technique for Fiber Optic Communication,†in 2018 IEEE 5th International Conference on Engineering Technologies and Applied Sciences (ICETAS), 2018, pp. 1–5.

T. Kaur and G. Soni, “Performance analysis of OTDM link at 40 Gbps,†in 2015 International Conference on Green Computing and Internet of Things (ICGCIoT), 2015, pp. 240–243.

E. Ciaramella, F. Bottoni, R. Corsini, M. Presi, and M. Artiglia, “Simple and effective solutions for low-cost coherent WDM-PON,†in 2015 International Conference on Photonics in Switching (PS), 2015, pp. 271–272, doi: 10.1109/PS.2015.7329023.

J. Yu et al., “400G/Channel 50-GHz WDM Coherent Transmission: PS 64QAM Versus Hybrid 32/64QAM,†in 2019 Optical Fiber Communications Conference and Exhibition (OFC), 2019, pp. 1–3.

J. M. Senior and M. Y. Jamro, Optical fiber communications: principles and practice. Pearson Education, 2009.

A. Israr, M. Junaid, and A. Israr, “Performance Analysis of Advance Optical Modulation Formats for GPON System,†in 2015 13th International Conference on Frontiers of Information Technology (FIT), 2015, pp. 77–80, doi: 10.1109/FIT.2015.11.

K. Chen, Y. Yu, S. Liaw, Z. Lee, Y. Lee, and N. Goto, “BER and Q factor evaluation of narrow-linewidth fiber ring laser,†in 2016 IEEE 6th International Conference on Photonics (ICP), 2016, pp. 1–3, doi: 10.1109/ICP.2016.7510045.

C. E. Shannon, “A mathematical theory of communication,†Bell system technical journal, vol. 27, no. 3, pp. 379–423, 1948.

F. Buchali, G. Böcherer, W. Idler, L. Schmalen, P. Schulte, and F. Steiner, “Experimental demonstration of capacity increase and rate-adaptation by probabilistically shaped 64-QAM,†in 2015 European Conference on Optical Communication (ECOC), 2015, pp. 1–3, doi: 10.1109/ECOC.2015.7341688.

R. Gallager, “Low-density parity-check codes,†IRE Transactions on Information Theory, vol. 8, no. 1, pp. 21–28, Jan. 1962, doi: 10.1109/TIT.1962.1057683.

M. Franceschini, G. Ferrari, and R. Raheli, “Does the Performance of LDPC Codes Depend on the Channel?,†IEEE Transactions on Communications, vol. 54, no. 12, pp. 2129–2132, Dec. 2006, doi: 10.1109/TCOMM.2006.885042.

G. Böcherer, P. Schulte, and F. Steiner, “Probabilistic Shaping and Forward Error Correction for Fiber-Optic Communication Systems,†Journal of Lightwave Technology, vol. 37, no. 2, pp. 230–244, Jan. 2019, doi: 10.1109/JLT.2019.2895770.

J. Cho and P. J. Winzer, “Probabilistic Constellation Shaping for Optical Fiber Communications,†Journal of Lightwave Technology, vol. 37, no. 6, pp. 1590–1607, Mar. 2019, doi: 10.1109/JLT.2019.2898855.

K. Lee, H. Kang, J. Park, and H. Lee, “100GB/S two-iteration concatenated BCH decoder architecture for optical communications,†in 2010 IEEE Workshop On Signal Processing Systems, 2010, pp. 404–409, doi: 10.1109/SIPS.2010.5624879.

B. Li, K. J. Larsen, D. Zibar, and I. T. Monroy, “Over 10 dB net coding gain based on 20% overhead hard decision forward error correction in 100G optical communication systems,†in 2011 37th European Conference and Exhibition on Optical Communication, 2011, pp. 1–3.

D. Chang et al., “LDPC convolutional codes using layered decoding algorithm for high speed coherent optical transmission,†in OFC/NFOEC, 2012, pp. 1–3.

T. Mizuochi et al., “Experimental Demonstration of Concatenated LDPC and RS Codes by FPGAs Emulation,†IEEE Photonics Technology Letters, vol. 21, no. 18, pp. 1302–1304, Sep. 2009, doi: 10.1109/LPT.2009.2025867.

N. Kamiya and S. Shioiri, “Concatenated QC-LDPC and SPC codes for 100 Gbps ultra long-haul optical transmission systems,†in 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference, 2010, pp. 1–3, doi: 10.1364/OFC.2010.OThL2.

Deyuan Chang et al., “FPGA verification of a single QC-LDPC code for 100 Gb/s optical systems without error floor down to BER of 10−15,†in 2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, 2011, pp. 1–3.

D. A. Morero, M. A. Castrillon, F. A. Ramos, T. A. Goette, O. E. Agazzi, and M. R. Hueda, “Non-Concatenated FEC Codes for Ultra-High Speed Optical Transport Networks,†in 2011 IEEE Global Telecommunications Conference - GLOBECOM 2011, 2011, pp. 1–5, doi: 10.1109/GLOCOM.2011.6133616.

K. Sugihara et al., “A spatially-coupled type LDPC Code with an NCG of 12 dB for optical transmission beyond 100 Gb/s,†in 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013, pp. 1–3, doi: 10.1364/OFC.2013.OM2B.4.

C. Choi, H. Lee, N. Kaneda, and Y. Chen, “Concatenated non-binary LDPC and HD-FEC codes for 100Gb/s optical transport systems,†in 2012 IEEE International Symposium on Circuits and Systems (ISCAS), 2012, pp. 1783–1786, doi: 10.1109/ISCAS.2012.6271611.

T. Mizuochi et al., “Evolution and status of forward error correction,†in OFC/NFOEC, 2012, pp. 1–3.

K. Onohara et al., “Soft-Decision-Based Forward Error Correction for 100 Gb/s Transport Systems,†IEEE Journal of Selected Topics in Quantum Electronics, vol. 16, no. 5, pp. 1258–1267, Sep. 2010, doi: 10.1109/JSTQE.2010.2040809.

B. P. Smith, A. Farhood, A. Hunt, F. R. Kschischang, and J. Lodge, “Staircase Codes: FEC for 100 Gb/s OTN,†Journal of Lightwave Technology, vol. 30, no. 1, pp. 110–117, Jan. 2012, doi: 10.1109/JLT.2011.2175479.

I. B. Djordjevic, L. Xu, and T. Wang, “Multidimensional turbo product and generalized LDPC codes with component RS codes suitable for use in beyond 100 Gb/s optical transmission,†in 2009 9th International Conference on Telecommunication in Modern Satellite, Cable, and Broadcasting Services, 2009, pp. 402–405, doi: 10.1109/℡SKS.2009.5339509.

Z. Wang, “Super-FEC Codes for 40/100 Gbps Networking,†IEEE Communications Letters, vol. 16, no. 12, pp. 2056–2059, Dec. 2012, doi: 10.1109/LCOMM.2012.112012.122083.

M. Scholten, T. Coe, and J. Dillard, “Continuously-interleaved BCH (CI-BCH) FEC delivers best in class NECG for 40G and 100G metro applications,†in 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference, 2010, pp. 1–3, doi: 10.1364/NFOEC.2010.NTuB3.

Y. Miyata, K. Kubo, K. Onohara, W. Matsumoto, H. Yoshida, and T. Mizuochi, “UEP-BCH product code based hard-decision FEC for 100 Gb/s optical transport networks,†in OFC/NFOEC, 2012, pp. 1–3.

I. PMC-Sierra, Swizzle FEC for 40G and 100G Optical Transmission White Paper. January, 2011.

Y. Jian, H. D. Pfister, K. R. Narayanan, Raghu Rao, and R. Mazahreh, “Iterative hard-decision decoding of braided BCH codes for high-speed optical communication,†in 2013 IEEE Global Communications Conference (GLOBECOM), 2013, pp. 2376–2381, doi: 10.1109/GLOCOM.2013.6831429.

M. Barakatain and F. R. Kschischang, “Low-Complexity Concatenated LDPC-Staircase Codes,†Journal of Lightwave Technology, vol. 36, no. 12, pp. 2443–2449, Jun. 2018, doi: 10.1109/JLT.2018.2812738.

L. M. Zhang and F. R. Kschischang, “Low-Complexity Soft-Decision Concatenated LDGM-Staircase FEC for High-Bit-Rate Fiber-Optic Communication,†Journal of Lightwave Technology, vol. 35, no. 18, pp. 3991–3999, Sep. 2017, doi: 10.1109/JLT.2017.2716373.

K. Cushon, P. Larsson-Edefors, and P. Andrekson, “Improved Low-Power LDPC FEC for Coherent Optical Systems,†in 2017 European Conference on Optical Communication (ECOC), 2017, pp. 1–3, doi: 10.1109/ECOC.2017.8345844.

D. A. Morero et al., “Experimental demonstration of a variable-rate LDPC code with adaptive low-power decoding for next-generation optical networks,†in 2016 IEEE Photonics Conference (IPC), 2016, pp. 307–308, doi: 10.1109/IPCon.2016.7831110.

T. Koike-Akino et al., “Iteration-Aware LDPC Code Design for Low-Power Optical Communications,†Journal of Lightwave Technology, vol. 34, no. 2, pp. 573–581, Jan. 2016, doi: 10.1109/JLT.2015.2477881.

K. Ishii et al., “100/150/200 Gb/s real-time demonstration of SD-FEC employing MSSC-LDPC codes for flexible coherent transport,†in 2017 Opto-Electronics and Communications Conference (OECC) and Photonics Global Conference (PGC), 2017, pp. 1–2, doi: 10.1109/OECC.2017.8114879.

K. Sugihara, S. Kametani, K. Kubo, T. Sugihara, and W. Matsumoto, “A practicable rate-adaptive FEC scheme flexible about capacity and distance in optical transport networks,†in 2016 Optical Fiber Communications Conference and Exhibition (OFC), 2016, pp. 1–3.

L. Beygi, E. Agrell, J. M. Kahn, and M. Karlsson, “Rate-Adaptive Coded Modulation for Fiber-Optic Communications,†Journal of Lightwave Technology, vol. 32, no. 2, pp. 333–343, Jan. 2014, doi: 10.1109/JLT.2013.2285672.

Yequn Zhang and I. B. Djordjevic, “Staircase rate-adaptive LDPC-coded modulation for high-speed intelligent optical transmission,†in OFC 2014, 2014, pp. 1–3, doi: 10.1364/OFC.2014.M3A.6.

T. Fehenberger, G. Böcherer, A. Alvarado, and N. Hanik, “LDPC coded modulation with probabilistic shaping for optical fiber systems,†in 2015 Optical Fiber Communications Conference and Exhibition (OFC), 2015, pp. 1–3, doi: 10.1364/OFC.2015.Th2A.23.

M. Arabaci, I. B. Djordjevic, R. Saunders, and R. M. Marcoccia, “Rate-adaptive non-binary-LDPC-coded polarization-multiplexed multilevel modulation with coherent detection for optically-routed networks,†in 2009 11th International Conference on Transparent Optical Networks, 2009, pp. 1–4, doi: 10.1109/ICTON.2009.5185083.

Y. Aikawa and H. Uenohara, “Demonstration of Optical FEC Coding Scheme With Convolutional Code Consisting of a Signal Source,†IEEE Photonics Technology Letters, vol. 29, no. 1, pp. 165–168, Jan. 2017, doi: 10.1109/LPT.2016.2631258.

Y. Aikawa and H. Uenohara, “Experimental demonstration of all-optical FEC coding scheme with convolutional code,†in 2016 21st OptoElectronics and Communications Conference (OECC) held jointly with 2016 International Conference on Photonics in Switching (PS), 2016, pp. 1–3.

C. Kherici and M. Kandouci, “Contribution to the performances study of Optical Time Division Multiplexing OTDM and OTDM/WDM hybrid multiplexing at 160 Gbps,†in 2019 International Conference on Wireless Technologies, Embedded and Intelligent Systems (WITS), 2019, pp. 1–4, doi: 10.1109/WITS.2019.8723826.

N. Wada et al., “Space division multiplexing (SDM) transmission and related technologies,†in 2014 16th International Telecommunications Network Strategy and Planning Symposium (Networks), 2014, pp. 1–6.

V. Kachhatiya and S. Prince, “Analysis of dense wavelength division multiplexed passive optical network (DWDM-PON),†in 2017 International Conference on Communication and Signal Processing (ICCSP), 2017, pp. 1974–1978.

R. Mishra, N. K. Shukla, M. Atif, and C. K. Dwivedi, “Performance Analysis of 8 Channel DWDM Systems via Dispersion Compensation Fiber Using NRZ, RZ, CSRZ Modulation Schemes,†in 2018 International Conference on Computer Communication and Informatics (ICCCI), 2018, pp. 1–6, doi: 10.1109/ICCCI.2018.8441500.

T. Islam and M. N. Uddin, “240 Gbit/s bit compressed hybrid OTDM-WDM fiber optic communication system,†in 2017 IEEE Region 10 Symposium (TENSYMP), 2017, pp. 1–5, doi: 10.1109/TENCONSpring.2017.8070083.

A. H. Ali, H. J. Alhamdane, and B. S. Hassen, “Design analysis and performance evaluation of the WDM integration with CO-OFDM system for radio over fiber system,†Indonesian Journal of Electrical Engineering and Computer Science, vol. 15, no. 2, pp. 870–878, 2019.

J. Ladrido, “Comparative Survey of Signal Processing and Artificial Intelligence Based Channel Equalization Techniques and Technologies,†International Journal of Emerging Trends in Engineering Research, pp. 311–322, 2019, doi: 10.30534/ijeter/2019/14792019.

G. E. Bottomley, Channel Equalization for Wireless Communications: From Concepts to Detailed Mathematics. Wiley, 2012 [Online]. Available: https://books.google.com.ph/books?id=ZUBbd2icM6IC

I. B. Djordjevic, “Advances in error correction coding for high-speed optical transmission,†in 2013 IEEE Photonics Conference, 2013, pp. 133–134, doi: 10.1109/IPCon.2013.6656407.

M. Tao et al., “Improved Dispersion Tolerance for 50G-PON Downstream Transmission via Receiver-Side Equalization,†in 2019 Optical Fiber Communications Conference and Exhibition (OFC), 2019, pp. 1–3.

H. Zheng, A. Shen, N. Cheng, N. Chand, F. Effenberger, and X. Liu, “High-Performance 50G-PON Burst-Mode Upstream Transmission at 25 Gb/s with DSP-Assisted Fast Burst Synchronization and Recovery,†in 2019 Asia Communications and Photonics Conference (ACP), 2019, pp. 1–3.

J. Wei et al., “Demonstration of the First Real-Time End-to-End 40-Gb/s PAM-4 for Next-Generation Access Applications Using 10-Gb/s Transmitter,†Journal of Lightwave Technology, vol. 34, no. 7, pp. 1628–1635, Apr. 2016, doi: 10.1109/JLT.2016.2518748.

J. Xia, T. Xu, Z. Li, Y. Li, Q. Zhang, and M. Wang, “Investigation on adaptive equalization techniques for 10G-glass optics based 100G-PON system,†in 2017 Opto-Electronics and Communications Conference (OECC) and Photonics Global Conference (PGC), 2017, pp. 1–3, doi: 10.1109/OECC.2017.8114834.

D. Zibar, J. Thrane, J. Wass, R. Jones, M. Piels, and C. Schaeffer, “Machine learning techniques applied to system characterization and equalization,†in 2016 Optical Fiber Communications Conference and Exhibition (OFC), 2016, pp. 1–3.

E. Giacoumidis et al., “Reduction of Nonlinear Intersubcarrier Intermixing in Coherent Optical OFDM by a Fast Newton-Based Support Vector Machine Nonlinear Equalizer,†Journal of Lightwave Technology, vol. 35, no. 12, pp. 2391–2397, Jun. 2017, doi: 10.1109/JLT.2017.2678511.

J. Zhang, W. Chen, M. Gao, B. Chen, and G. Shen, “Novel Low-Complexity Fully-Blind Density-Centroid — Tracking Equalizer for 64-QAM Coherent Optical Communication Systems,†in 2018 Optical Fiber Communications Conference and Exposition (OFC), 2018, pp. 1–3.

J. Torres-Zugaide, I. Aldaya, G. Campuzano, E. Giacoumidis, J. Beas, and G. Castañón, “Range extension in coherent OFDM passive optical networks using an inverse Hammerstein nonlinear equalizer,†IEEE/OSA Journal of Optical Communications and Networking, vol. 9, no. 7, pp. 577–584, Jul. 2017, doi: 10.1364/JOCN.9.000577.

S. T. Ahmad and K. P. Kumar, “Radial Basis Function Neural Network Nonlinear Equalizer for 16-QAM Coherent Optical OFDM,†IEEE Photonics Technology Letters, vol. 28, no. 22, pp. 2507–2510, Nov. 2016, doi: 10.1109/LPT.2016.2601901.

T. Nguyen, S. Mhatli, E. Giacoumidis, L. V. Compernolle, M. Wuilpart, and P. Mégret, “Fiber Nonlinearity Equalizer Based on Support Vector Classification for Coherent Optical OFDM,†IEEE Photonics Journal, vol. 8, no. 2, pp. 1–9, Apr. 2016, doi: 10.1109/JPHOT.2016.2528886.

X. Zhou et al., “Low-Complexity One-Step Digital Back-Propagation for Single Span High-Capacity Coherent Transmissions,†IEEE Photonics Journal, vol. 9, no. 3, pp. 1–11, Jun. 2017, doi: 10.1109/JPHOT.2017.2702379.

S. Mhatli, H. Mrabet, I. Dayoub, and E. Giacoumidis, “A novel support vector machine robust model based electrical equaliser for coherent optical orthogonal frequency division multiplexing systems,†IET Communications, vol. 11, no. 7, pp. 1091–1096, 2017, doi: 10.1049/iet-com.2016.1115.

E. Giacoumidis, A. Matin, J. Wei, N. J. Doran, L. P. Barry, and X. Wang, “Blind Nonlinearity Equalization by Machine-Learning-Based Clustering for Single- and Multichannel Coherent Optical OFDM,†Journal of Lightwave Technology, vol. 36, no. 3, pp. 721–727, Feb. 2018, doi: 10.1109/JLT.2017.2778883.

R. Koma, M. Fujiwara, J. Kani, K. Suzuki, and A. Otaka, “Burst-mode digital signal processing that pre-calculates FIR filter coefficients for digital coherent pon upstream,†IEEE/OSA Journal of Optical Communications and Networking, vol. 10, no. 5, pp. 461–470, May 2018, doi: 10.1364/JOCN.10.000461.

J. Cheng, C. Xie, M. Tang, and S. Fu, “Hardware Efficient Adaptive Equalizer for Coherent Short-Reach Optical Interconnects,†IEEE Photonics Technology Letters, vol. 31, no. 15, pp. 1249–1252, Aug. 2019, doi: 10.1109/LPT.2019.2924465.

E. Giacoumidis, A. Tsokanos, M. Ghanbarisabagh, S. Mhatli, and L. P. Barry, “Unsupervised Support Vector Machines for Nonlinear Blind Equalization in CO-OFDM,†IEEE Photonics Technology Letters, vol. 30, no. 12, pp. 1091–1094, Jun. 2018, doi: 10.1109/LPT.2018.2832617.

X. Zhang et al., “Joint Polarization Tracking and Equalization in Real-Time Coherent Optical Receiver,†IEEE Photonics Technology Letters, vol. 31, no. 17, pp. 1421–1424, Sep. 2019, doi: 10.1109/LPT.2019.2929824.

A. Bakhshali et al., “Frequency-Domain Volterra-Based Equalization Structures for Efficient Mitigation of Intrachannel Kerr Nonlinearities,†Journal of Lightwave Technology, vol. 34, no. 8, pp. 1770–1777, Apr. 2016, doi: 10.1109/JLT.2015.2510607.

Y. Fazea, A. Amphawan, Y. Al-Gumaei, A. M. Al-Samman, and W. M. Al-Rahmi, “Modes power equalization based-singular value decomposition in mode division multiplexing systems for multi-hungry bandwidth applications,†Optical Fiber Technology, vol. 61, p. 102389, Jan. 2021.

E. Giacoumidis, Y. Lin, M. Blott, and L. P. Barry, “Real-time machine learning based fiber-induced nonlinearity compensation in energy-efficient coherent optical networks,†APL Photonics, vol. 5, no. 4, p. 041301, 2020, doi: 10.1063/1.5140609.

D. Zabala-Blanco, M. Mora, C. A. Azurdia-Meza, A. Dehghan Firoozabadi, P. Palacios Játiva, and I. Soto, “Relaxation of the Radio-Frequency Linewidth for Coherent-Optical Orthogonal Frequency-Division Multiplexing Schemes by Employing the Improved Extreme Learning Machine,†Symmetry, vol. 12, no. 4, p. 632, 2020, doi: 10.3390/sym12040632.

X. Zhang et al., “Real time low-complexity adaptive channel equalization for coherent optical transmission systems,†Opt. Express, vol. 28, no. 4, pp. 5058–5068, Feb. 2020, doi: 10.1364/OE.385370. [Online]. Available: http://www.opticsexpress.org/abstract.cfm?URI=oe-28-4-5058

DOI: http://dx.doi.org/10.18517/ijaseit.11.3.14093


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