基于高精度相频同步的节点端无损切换技术研究
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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。
With the development of network high precision fixed node time and frequency synchronization technology,the nodeend 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.
With the development of network high precision fixed node time and frequency synchronization technology,the nodeend 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.
引文
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[10]王宏兵,高扬,肖胜红.导航卫星主备钟平稳切换性能设计分析[J].无线电工程,2016(9).
[11]卢建福,高玉平,林思佳.时频系统中主备钟一致性保持方法研究[J].时间频率学报,2013,36(4):222-224.
[2]白钰.光纤时频网络化精密同步及航天测量应用[D].北京:清华大学,2015.
[3]吴智斌,赵军,李冰.氢钟频移校准与无损切换[J].无线电工程,2018(4).
[4]王立军.频率源的平稳切换技术研究[D].西安:西安电子科技大学,2013.
[5]邢彦超,杨俊,汤超.一种铷原子钟双钟热备相位无扰切换系统的设计[J].时间频率学报,2011(2):101-105.
[6]Manassewitsch V.Frequency Synthesizers Theory and Design[J]. PublishingHouseof Electronics Industry,2008(3):14-19.
[7]李迪亮.频率源的相位同步与控制技术[D].西安:西安电子科技大学,2013.
[8]迟忠君,徐云,常飞.频率合成技术发展概述[J].现代科学仪器,2006(3).
[9]马文起,吴智斌,李晶.高稳定度光纤时频相干传输技术研究[J].无线电工程,2015(12).
[10]王宏兵,高扬,肖胜红.导航卫星主备钟平稳切换性能设计分析[J].无线电工程,2016(9).
[11]卢建福,高玉平,林思佳.时频系统中主备钟一致性保持方法研究[J].时间频率学报,2013,36(4):222-224.