基于高精度相频同步的节点端无损切换技术研究

Nodal nondestructive switching technology based on high precision phase and frequency synchronization

摘要:

随着网络化高精度固定节点时频同步技术的发展，需要对簇节点端多输入信号进行处理。针对簇节点端多输入信号同源多路径的特性，为了提升系统的稳健性，提出了一种信号无损切换的方法，兼顾了开关的隔离度和切换速度；实现了主备路信号ps量级的同步精度，有效抑制了切换过程中的相位跳变，并对不同条件下的主备路相位同步精度、系统无损切换性能进行了仿真实验。仿真结果表明，提出的方案显著提升了主备路相位同步精度，有效抑制了切换过程中产生的相位跃变，验证了不同条件对系统精度的影响，对节点端无损切换乃至信号融合方面具有很大的借鉴意义。

Abstract:

With the development of network high precision fixed node time and frequency synchronization technology, the node-end multi-input signal needs to be processed. Aiming at the characteristic of the node-end multi-input signal that they are homologous and come from the different path, in order to improve the damage resistance of the system, a method of signal nondestructive switching is proposed, and the corresponding simulation experiments are carried out; A design scheme of system switching switch is presented, which takes into account the isolation degree and switching speed of the switch; We implement the main and standby signal synchronization accuracy of picoseconds level, effectively restrain the switching process of phase jump, and the different conditions of the main rode for the accuracy of signal phase synchronization, system condition the performance of the switch are simulated. The simulation results show that the proposed scheme significantly increased the main road phase synchronization precision, effectively restrain the switching process of phase jump, the influence of different conditions on the system accuracy is verified, the node-end condition switch and signal integration with great significance.