FIR filter design for GNSS-synchronized clock

被引：0

作者：

Wu, Hongwei ^{[1
]}

Li, Duo ^{[2
]}

Gu, Sihong ^{[3
]}

机构：

[1] University of Chinese Academy of Sciences, Beijing,100049, China

[2] University of Chinese Academy of Sciences, Beijing,100049, China

[3] Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan,Hubei,430071, China

来源：

International Journal of Circuits, Systems and Signal Processing | 2019年 / 13卷

关键词：

Signal receivers - Impulse response - Communication satellites - Synchronization - Global positioning system;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We investigate a scheme that utilizes the one-pulse-per-second (1PPS) signal of a Global Navigation Satellite System (GNSS) receiver as a reference to synchronize the local clock in the time synchronization system. The noise of the correct signal caused by jitter in the 1PPS signal is the main factor affecting the synchronization precise. To reduce the noise and improve the synchronization precise, a finite-impulse-response filter is proposed based on least-squares estimation and moving average. The experimental results indicate that the noise can be effectively reduced with this filter. The proposed scheme helps in realizing a synchronized clock for which the one-second precision-time-protocol (PTP) variance is improved by two orders of magnitude and the kilo-second PTP variance is improved by one order of magnitude over those of GNSS receivers. © 2019, North Atlantic University Union. All rights reserved.

引用

页码：593 / 597