激光与光电子学进展, 2018, 55 (3): 030604, 网络出版: 2018-09-10
借助聚类分析的光发射机信号畸变评估方法 
下载： 1122次
Optical Transmitter Signal Distortion Evaluation Based on Cluster Analysis
图 & 表
图 1. 信号光和本振光链路长度相等实验系统原理图
Fig. 1. Schematic of experiment with the same length of signal fiber link and local oscillator link
图 2. 三种畸变类型的星座图。(a) I-Q增益不平衡;(b) I-Q相位误差;(c) I-Q幅度分布不均匀
Fig. 2. Constellations of three kinds of distortion. (a) I-Q gain imbalance constellation; (b) I-Q phase error constellation; (c) I-Q amplitude uneven distribution constellation
图 4. (a)聚类处理后的星座图;(b)理想聚类点的星座图
Fig. 4. (a) Constellation with cluster analysis; (b) cluster centroid constellation
图 5. DSP处理恢复的星座图。(a)、(b)、(c)分别为用标准星座点恢复的I-Q增益不平衡、I-Q相位误差、I-Q幅度分布不均匀的星座图;(d)、(e)、(f)分别为用聚类星座点恢复的I-Q增益不平衡、I-Q相位误差、I-Q幅度分布不均匀的星座图
Fig. 5. Distorted constellations after DSP. Constellations of (a) I-Q gain imbalance signal, (b) I-Q phase error signal, and (c) I-Q amplitude uneven distribution signal processed reference to the standard constellation; constellations of (d) I-Q gain imbalance signal, (e) I-Q phase error signal, and (f) I-Q amplitude uneven distribution signaprocessed reference to the cluster centroid constellation
图 6. 不同OSNR下对畸变情况的估计值。(a) I-Q增益不平衡系数估计值;(b) I-Q相位误差系数估计值
Fig. 6. Estimated values of distortion with different OSNRs. (a) Estimated values of I-Q gain imbalance coefficient; (b) estimated values of I-Q phase error
图 7. 不同OSNR下I-Q幅度分布不均匀系数估计图
Fig. 7. Estimated values of I-Q amplitude uneven distribution with different OSNRs
图 8. (a)光纤链路相等时接收信号星座图;(b)光纤链路不等时接收信号星座图
Fig. 8. Constellations of recieved signal with (a) equal fiber link and (b) unequal fiber link
图 9. 三种畸变信号恢复后星座图。(a) I-Q增益不平衡;(b) I-Q幅度分布不均匀;(c) I-Q相位误差
Fig. 9. Recovery constellations of (a) I-Q gain imbalance signal, (b) I-Q amplitude uneven distribution signals, and (c) I-Q phase error signal
周钟青, 杨彦甫, 张群, 何倩雯, 向前, 曹军涛. 借助聚类分析的光发射机信号畸变评估方法[J]. 激光与光电子学进展, 2018, 55(3): 030604. Zhongqing Zhou, Yanfu Yang, Qun Zhang, Qianwen He, Qian Xiang, Juntao Cao. Optical Transmitter Signal Distortion Evaluation Based on Cluster Analysis[J]. Laser & Optoelectronics Progress, 2018, 55(3): 030604.
PDF全文
