光通信研究, 2020 (5): 54, 网络出版: 2021-04-17  

基于时间偏差的时钟噪声传递特性估算法

Estimated Method of Clock Noise Transfer Characteristics based on Time Deviation
作者单位
中国信息通信研究院, 北京 100191
摘要
噪声传递特性是传送网承载设备的典型时钟同步特性之一。针对传统选频法测试效率较低, 且难以全面反映设备带内增益情况的问题, 文章通过对时间偏差(TDEV)特性和噪声传递频率响应关系的分析, 提出了基于TDEV的时钟噪声传递特性估算方法。实验结果表明, 该方法有效解决了现有选频法在测试效率或测试精度方面的不足, 可更好地满足现有承载设备时钟和面向5G超高精度的增强型同步以太时钟噪声传递特性的测试需求。
Abstract
Noise transfer characteristic is a typical clock synchronization characteristic of network element in transport network. Traditional frequency selection method is inefficient, and it is difficult to display the in band gain of the device fully. Through the analysis of the relationship between Time Deviation (TDEV) and noise transfer frequency response, an improved noise estimation method based on TDEV is proposed in this paper. The experimental results show that the proposed method effectively solves the shortcomings of the existing frequency selection method for the aspect of testing efficiency or accuracy. It is believed that the proposed method can meet the test requirements of the traditional carrier network equipment clock and the enhanced synchronous ethernet equipment clock noise transfer characteristics for 5G ultra-high precision.

李曙方, 吕博, 胡昌军, 潘峰, 缪新育. 基于时间偏差的时钟噪声传递特性估算法[J]. 光通信研究, 2020, 46(5): 54. LI Shu-fang, Lü Bo, HU Chang-jun, PAN Feng, MIAO Xin-yu. Estimated Method of Clock Noise Transfer Characteristics based on Time Deviation[J]. Study On Optical Communications, 2020, 46(5): 54.

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