| GPS接收机精确授时技术研究 |
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| 引用本文： | 王礼亮,孟诏,宋鹏飞. GPS接收机精确授时技术研究[J]. 航天控制, 2011, 29(5): 40-42,52 |
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| 作者姓名： | 王礼亮 孟诏 宋鹏飞 |
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| 作者单位： | 1. 北京61081部队,北京,100094
2. 北京航天自动控制研究所,北京,100854 |
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| 摘 要： | 导航接收机定位后往往需要将计算得到的本地时与GPS系统时的时间差直接补偿到本地时间系统中,使得二者的时间系统达到同步,但是这种方式无法修正二者之间的频率差异,导致本地时钟在本地时修正后渐渐“漂离”了正确的系统时间,本文采用了DDS的方式控制本地时钟频率,在导航解算得到本地时偏差后,通过一个二阶滤波器,将滤波后的时间偏差...
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| 关 键 词： | DDS 本地时 二阶滤波器 |
Research on Accurate Time Synchronization Technology for GPS Receiver |
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| WANG Liliang,MENG Zhao,SONG Pengfei. Research on Accurate Time Synchronization Technology for GPS Receiver[J]. Aerospace Control, 2011, 29(5): 40-42,52 |
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| Authors: | WANG Liliang MENG Zhao SONG Pengfei |
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| Affiliation: | WANG Liliang1 MENG Zhao2 SONG Pengfei2 1.Beijing 61081 Unit,Beijing 100094,China 2.Beijing Aerospace Automatic Control Institute,Beijing 100854,China |
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| Abstract: | The value between the local time and GPS system time which is computed by GNSS receiver after positioning needs to be compensated to the local time for time synchronization,but this method can not modify the frequency difference between them,which cause the local time depart from the system time.The DDS is used to control the frequency of the local time.The time error computed by receiver is transformed into local time system bias through a two-order filter.The difference between the local time and GPS syst... |
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| Keywords: | DDS Local time Twice-order filter |
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