光学学报, 2014, 34 (11): 1106006, 网络出版: 2014-10-13
偏振复用相干光纤通信系统中的自适应色散监测
Adaptive Dispersion Monitoring for Polarization-Multiplexed Coherent Optical Communication Systems
光通信 相干光纤通信 自适应色散估计 自相关函数 恒模误差函数 optical communications coherent optical communication adaptive chromatic dispersion estimation auto-correlation function constant modulus algorithm
摘要
针对长距离相干光纤通信系统，提出了一种超大色散(CD)监测范围的两级自适应高精度色散估计算法。该算法利用信号功率自相关波形(ACSPW)函数作为粗估计，再使用恒模误差函数（CMA）中心值搜索，得到精确色散值。仿真结果表明，新算法色散估计误差小于35 ps/nm，比传统ACSPW算法精度提高将近4倍；在参考误码率为10-2时，对比传统ACSPW算法，提出的算法功率罚改善8 dB。
Abstract
An adaptive and precise chromatic dispersion (CD) estimation algorithm with a large dispersion monitoring range is proposed based on a two-stage structure for long haul coherent optical communication systems. A coarse estimation of chromatic dispersion is obtained by employing the auto correlation of signal power waveform (ACSPW). Afterwards, a precise CD value can be estimated by using the modified constant modulus (CMA) scheme. Simulation results show that the measured error value is less than 35 ps/nm by using the proposed algorithm, and the accuracy is improved about four-times compared to the conventional ACSPW algorithm. When the reference error rate is 10-2, the power penalty compared to the ACSPW algorithm is improved by 8 dB.
蒋林, 闫连山, 易安林, 陈智宇, 盘艳, 潘炜, 罗斌. 偏振复用相干光纤通信系统中的自适应色散监测[J]. 光学学报, 2014, 34(11): 1106006. Jiang Lin, Yan Lianshan, Yi Anlin, Chen Zhiyu, Pan Yan, Pan Wei, Luo Bin. Adaptive Dispersion Monitoring for Polarization-Multiplexed Coherent Optical Communication Systems[J]. Acta Optica Sinica, 2014, 34(11): 1106006.
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