基于GPS/北斗系统的时间源研究与设计

为了提高分布式测试系统中各设备单元的时间同步精度,需要研制安全可靠的时间源。首先分析了时间源的结构组成与系统模型,提出了采用多时间基准冗余配置的方法,提高了时间源的可靠性。在此基础上给出了基于GPS/北斗系统的双模时间源设计方案,并对系统性能进行了验证。实验结果表明时间源的性能达到了ITU-T G811规范的要求。目前,该系统成功应用于CDMA基站的定时系统。

Research and design of time source based on GPS/BD system

To achieve high time synchronization accuracy among various testing equipments of distributed measurement and control systems,a safe and reliable time source is required.The architecture and model of the time source is analyzed firstly,and a configurable method of redundancy time benchmark is presented,which can enhance the reliability of the time source.On the basis of the method,a double mode time source based on GPS and BD system is designed.The experimental result shows that the proposed time source satisfies the ITU-T G811 criterion.The time source has been used in CDMA systems as a time benchmark now.