Abstract
We demonstrate a novel modulation format independent algorithm for adaptive blind polarization demultiplexing for elastic optical networks (EONs). We compare the proposed algorithm with traditional constant modulus algorithm (CMA) and radius-directed algorithm (RDA), in terms of performance in PM-QPSK, PM-16QAM and PM-64QAM coherent system, by simulating in back-to-back (BTB) and transmission sceneries. The simulation result shows that the modulation format independent algorithm can achieve universal adaptive blind polarization demultiplexing for PM-mQAM signals and gain slightly better performance in condition of lower optical signal noise ratio (OSNR). Furthermore, we also carry out experiments to investigate the performance of the proposed algorithm in BTB and 800 km transmission scenarios for 16 GBaud PM-QPSK and PM-16QAM. The experimental results demonstrate the conclusion of the numerical simulations.
摘要
创新点
本文提出了一种调制格式无关的盲偏振解复用算法。 该算法通过对蝶形FIR滤波器输出信号进行坐标变换, 将多模信号变换为恒模信号, 实现滤波器抽头系数自适应更新; 该算法可在未知信号调制格式的前提下对其进行偏解振复用, 因此所提算法与调制格式无关; 该盲均衡算法无需训练序列, 节约频谱资源, 适用于网络流量愈加动态、 多样和不可预测的应用场景; 仿真和实验中分别和CMA、 RDA算法进行对比, 结果证明了该算法的有效性。
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References
Zhou X, Nelson L E, Magill P. Rate-adaptable optics for next generation long-haul transport networks. IEEE Commun Mag, 2013, (51): 41–49
Zhuge Q, Morsy-Osman M, Xu X, et al. Spectral efficiency-adaptive optical transmission using time domain hybrid QAM for agile optical networks. IEEE/OSA J Lightw Tech, 2013, (31): 2621–2628
Gerstel O, Jinno M, Lord A, et al. Elastic optical networking: a new dawn for the optical layer? IEEE Commun Mag, 2012, 50: s12–s20
Roberts K, Laperle C. Flexible transceivers. In: Proceedings of the 38th European Conference and Exhibition on Optical Communication (ECOC), Amsterdam, 2012. 1–3
Winzer P J. High-spectral-efficiency optical modulation formats. IEEE/OSA J Lightw Tech, 2012, (30): 3824–3835
Lau A P T, Gao Y, Sui Q, et al. Advanced DSP techniques enabling high spectral efficiency and flexible transmissions: toward elastic optical networks. IEEE Sig Proc Mag, 2014, (31): 82–92
Fischer J K, Alreesh S, Elschner R, et al. Bandwidth-variable transceivers based on four-dimensional modulation formats. IEEE/OSA J Lightw Tech, 2014, (32): 2886–2895
He Z L, Liu W T, Shi S, et al. Flexible multi-dimensional modulation method for elastic optical networks. Opt Commun, 2016, (359): 304–310
Winzer P J, Essiambre R J. Advanced modulation formats for high-capacity optical transport networks. IEEE/OSA J Lightw Tech, 2006, (24): 4711–4728
Taylor M G. Coherent detection method using DSP for demodulation of signal and subsequent equalization of propagation impairments. IEEE Photon Tech Lett, 2004, (16): 674–676
Ip E, Lau A P, Barros D J, et al. Coherent detection in optical fiber systems. Opt Express, 2008, (16): 753–791
Hauske F N, Xie C, Zhang Z P, et al. Frequency domain chromatic dispersion estimation. In: Proceedings of Optical Fiber Communications Conference and Exhibition (OFC), San Diego, 2010. 1–3
Roudas I, Vgenis A, Petrou C S, et al. Optimal polarization demultiplexing for coherent optical communications systems. IEEE/OSA J Lightw Tech, 2010, (28): 1121–1134
Do C C, Tran A V, Zhu C, et al. Data-aided chromatic dispersion estimation for polarization multiplexed optical systems. IEEE Photon J, 2012, (4): 2037–2049
Shi W, Zhi Q, Li Y, et al. A novel modified constant modulus algorithm based on QAM signals. Elec Info Warfare Tech, 2007, 2: 7
He Z Y, Liu J, Yang L X, et al. An ICA and EC based approach for blind equalization and channel parameter estimation. Sci China Ser E-Tech Sci, 2000, (43): 1–8
Xu X D, Dai X C, Xu P X. Weighted multimodulus blind equalization algorithm for high-order QAM signals. J Electron Inf Tech, 2007, (29): 1352–1355
Lavery D, Thomsen B C, Bayvel P, et al. Reduced complexity equalization for coherent long-reach passive optical networks. IEEE/OSA J Opt Commun Netw, 2015, 7: A16–A27
Zhang L, Hu X F, Cao P, et al. A flexible multi-16QAM transmitter based on cascaded dual-parallel Mach-Zehnder modulator and phase modulator. Sci China Inf Sci, 2013, (56): 598–602
Zhou X, Chen X, Zhou W, et al. All-digital timing recovery and adaptive equalization for 112 Gbit/s POLMUX-NRZDQPSK optical coherent receivers. IEEE/OSA J Opt Commun Netw, 2010, (2): 984–990
Fatadin I, Savory S J. Compensation of frequency offset for 16-QAM optical coherent systems using QPSK partitioning. IEEE Photon Tech Lett, 2011, (23): 1246–1248
Kuschnerov M, Hauske F N, Piyawanno K, et al. DSP for coherent single-carrier receivers. IEEE/OSAJ Lightw Tech, 2009, (27): 3614–3622
Ke J H, Zhong K P, Gao Y, et al. Linewidth-tolerant and low-complexity two-stage carrier phase estimation for dual-polarization 16-QAM coherent optical fiber communications. IEEE/OSA J Lightw Tech, 2012, (30): 3987–3992
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Yang, T., Liu, W., Chen, X. et al. Modulation format independent blind polarization demultiplexing algorithms for elastic optical networks. Sci. China Inf. Sci. 60, 022305 (2017). https://doi.org/10.1007/s11432-016-0321-x
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DOI: https://doi.org/10.1007/s11432-016-0321-x
Keywords
- PM-mQAM
- blind polarization demultiplexing algorithms
- modulation format independence
- coordinate transformation
- elastic optical networks (EONs)