载波相位DGPS标校系统时间同步设计与仿真

Design and Simulation of Time Synchronization on Alignment Calibration System of Carrier Phase DGPS

摘要:

在设计和实现载波相位 DGPS标校系统时,各个子系统之间及内部数据传输过程中存在的时间延迟问题是整个标校系统的关键问题之一。文章针对各子系统数据传输的时间延迟问题,详细介绍了时间同步的不同方法；提出了一种利用 GPS OEM板提供外部时间基准与基于 TCP网络的时间同步算法处理网络延迟相结合的分布式混合时间同步方案,并对其原理和实现过程进行了阐述；仿真实验证明了分布式混合时间同步方案的可行性和有效性。

Abstract:

In the design and implementation of carrier phase DGPS alignment calibration system, the time synchronizationproblem of the data transmission between the various subsystems is one of the key problems in the calibration system. Inthis paper, pointing at the time synchronization problem of the data transmission between the various subsystems, severalmethods of time synchronization was introdued in detail. Then a scheme of distributed and mixing time synchronizationbased on combining GPS OEM external time reference and clock synchronization algorithm based on TCP network delaytreatment was proposed and the theory and realization process was described. Finally through the simulation experiment itsfeasibility and validity were proved.