| 一种双向测距与时间同步系统的设计与分析 |
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| 引用本文： | 马红皎,吴华兵,李梦,王康,武建锋,何在民,胡永辉.一种双向测距与时间同步系统的设计与分析[J].时间频率学报,2014(1):18-24. |
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| 作者姓名： | 马红皎 吴华兵 李梦 王康 武建锋 何在民 胡永辉 |
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| 作者单位： | [1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600 [3]中国科学院大学,北京100049 |
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| 基金项目： | 中国科学院“西部之光”人才培养计划资助项目（0905YR2601） |
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| 摘 要： | 在研究双向单程伪距测量原理的基础上，设计了双向测距与时间同步（DRTS）终端系统总体构架，阐述了在系统中使用的技术，并搭建了基于DSP＋FPGA的双向测距与时间同步系统软硬件平台。实验结果表明，此系统的码速率为5MHz、中心频率为15MI-Iz时，测距和时间同步的分辨率可达0．15cm和5ps（@1S），采用不同频率源时测距和时间同步的精度分别为1．038m和3．46ns，采用相同频率源时分别为0．28cm和9．43ps（参考频率稳定度1×10^-10／d量级）。与国外同类产品相比具有测量精度优势，但考虑通用性，此系统的硬件仍需进一步优化，软件上需要做到码速率可调。
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| 关 键 词： | 精密测距 时间同步 双向单程伪距测量 双向测距与时间同步（DRTS） |
Design and analysis of system of dual ranging and time synchronization |
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| MA Hong-jiao,WU Hua-bing,LI Meng,WANG Kang,WU Jian-feng,HE Zai-min,HU Yong-Hui.Design and analysis of system of dual ranging and time synchronization[J].Journal of Time and Frequency,2014(1):18-24. |
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| Authors: | MA Hong-jiao WU Hua-bing LI Meng WANG Kang WU Jian-feng HE Zai-min HU Yong-Hui |
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| Institution: | 1. National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China; 2. Key Laboratory of Time and Frequency Primary Standard, National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China) |
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| Abstract: | A framework of DRTS（dual ranging and time synchronization） system was designed based on the principle of DOWR（dual one-way ranging）. The technique used in the system was demonstrated. And a hardware/software platform for DRTS system was built based on DSP and FPGA. The results from experiment show that the ranging resolution and time synchronization resolution are 0.15 cm and 5 ps（for 1 s time interval） respectively for the DRTS system when the code rate is 5 MHz and the centric frequency is 15 MHz, and the ranging precision and time synchronization precision are 1.038 m and 3.46 ns respectively when differentfrequency references are used as well as the ranging precision and time synchronization precision are 0.28 cm and 9.43 ps respectively when the same frequency reference with a frequency stability of 10^-10 is used. The DRTS system is superior to foreign similar products in measuring precision. However, in view of versatility, the hardware of the DRTS system still needs further optimization and the software of the DRTS system should be improved to be able to adiust the code rate. |
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| Keywords: | precise ranging time synchronization dual one-way ranging DRTS（dual ranging and timesynchronization） |
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