| OTU锁相环中噪声的影响分析 |
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| 引用本文： | 袁建国,梁天宇,王望,顾盛. OTU锁相环中噪声的影响分析[J]. 压电与声光, 2011, 33(4) |
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| 作者姓名： | 袁建国 梁天宇 王望 顾盛 |
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| 作者单位： | 重庆邮电大学光纤通信技术重点实验室,重庆,400065 |
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| 基金项目： | 国家自然科学基金资助项目(No.60907041;No.61071117); 重庆市自然科学基金资助项目(No.2010BB2409); 重庆市教委基金资助项目(No.kJ110519) |
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| 摘 要： | 光转发单元(OTU)中锁相环带宽与抖动不可避免会受到其噪声的影响。分别求出OTU锁相环中主要噪声源对环路的响应,使用叠加原理,计算出整个环路输出抖动的噪声功率谱,分析相位噪声功率谱与抖动间的关系,得到只有环路带宽选择要适当且锁相环各个组件的参数也要合适,抖动传递函数才在一定抖动频率下不会超标等重要结论。并能运用这些结论来定性解释实际测试OTU中抖动传递函数曲线。
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| 关 键 词： | 锁相环 噪声 带宽 抖动 |
Analysis of the Impact of Noise on the Phase-Locked Loop of OTU |
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| YUAN Jianguo,LIANG Tianyu,WANG Wang,GU Sheng. Analysis of the Impact of Noise on the Phase-Locked Loop of OTU[J]. Piezoelectrics & Acoustooptics, 2011, 33(4) |
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| Authors: | YUAN Jianguo LIANG Tianyu WANG Wang GU Sheng |
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| Affiliation: | YUAN Jianguo,LIANG Tianyu,WANG Wang,GU Sheng(Key Lab.of Optical Fiber Communications Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China) |
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| Abstract: | The bandwidth and jitter of phase-locked loop(PLL) in optical transponder unit(OTU) are inevitably affected by the noises.After the main noise responses of PLL in OTU are separately calculated,and then the power spectrum density(PSD) of the output jitter noise in the loop can be obtained by applying the superposition principle.Basing on the analysis of the relationship between PSD of phase-noise and jitter,several significant conclusions can be acquired,for example,the jitter transfer function will meet the... |
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| Keywords: | phase-locked loop noise bandwidth jitter |
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