Precise 1PPS signal by GPS
Precise 1PPS signal by GPS
复制标题
GPS 提供精确的 1PPS 信号
DOI：
10.1541/ieejeiss.125.1217
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发表时间：
2005
影响因子：
--
通讯作者：
Masahiro Genda
中科院分区：
文献类型：
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作者：
Hiroaki Toyoizumi;Masahiro Genda
GPS不仅用于获取位置信息，而且用于获取时间信息。特别地，它用于测量系统或通信系统中不同台站之间的时间同步。然而，在这些系统中，GPS接收机中1PPS信号的输出电路并没有得到优化。本文对GPS时间测量的误差来源进行了分析，结果表明GPS时间测量精度约为10ns，提高1PPS信号的精度是实现高精度1PPS信号的关键。我们提出了一种利用模拟电路精确产生1PPS信号的方法，其输出精度足以高于GPS的时间测量精度。通过24小时的测试，对时间测量精度和1PPS信号相对时间同步的精度进行了评价，并利用我们的精确1PPS生成方法，成功地实现了1PPS信号相对时间同步的几ns精度和几ns精度。
GPS is widely used to obtain not only the position information but also the time information. Specially, it is used to synchronize the time between separate stations in the measurement system or the communications system. However, in these systems, the output circuit of the 1PPS signal in the GPS receiver has not been optimized. In this paper, we examine the error sources of the time measurement by GPS and show the time measurement accuracy is about 10 ns, and the improvement of the precision of 1PPS signal is most important to realize high accurate 1PPS signal. We propose the precise 1PPS generating method by the analog circuit whose output precision is sufficiently higher than the time measurement accuracy by GPS. We evaluated the time measurement accuracy and the accuracy of 1PPS signal in the relative time synchronization by 24 hours test, and succeeded to realize a few ns precision and several ns accuracy of 1PPS signal in the relative time synchronization using our precise 1PPS generating method.