应用于星地时间同步中的匹配滤波器设计与实现  

Design and implementation of a matched filter applied to time synchronization between satellite and Earth

作　　者：陈菲[1,2] 胡永辉[1,3,4] 武建锋[1,3,4] 何在民[1,3,4] 闫温合 CHEN Fei HU Yong-hui WU Jian-feng HE Zai-min YAN Wen-he(National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China University of Chinese Academy of Sciences, Beijing 100049, China Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院大学,北京100049 [3]中国科学院精密导航定位与定时技术重点实验室,西安710600 [4]中国科学院时间频率基准重点实验室,西安710600

出　　处：《时间频率学报》2016年第4期274-281,共8页Journal of Time and Frequency

基　　金：中国科学院"西部之光"人才培养计划资助项目(2013YB06)

摘　　要：信号捕获是星地时间同步中的关键环节,采用折叠型匹配滤波器来实现信号的快速捕获。该滤波器主要是采用分段相关累加,同时在FPGA的基础上对该滤波器的功能进行了实现和在线测试。结果表明:该滤波器具有设计合理、结构灵活、节省资源、捕获快等优点,并已应用于实际的星地时间同步设备的工程实现中。The signal acquisition is a key link in the time synchronization between satellite and Earth. In this paper, a folded matched filter is adopted to realize the fast acquisition of the signal, and this designed filter adopts the segmented correlation accumulation method and has been realized and tested on the basis of FPGA. The results show that the filter has some advantages such as reasonable design, flexible structure, saving of resources and fast acquisition. This filter has been applied to the practical engineering of the time synchronization between satellite and Earth equipment.

关 键 词：捕获 折叠匹配滤波器 FPGA 相关 

分 类 号：TN967.1[电子电信—信号与信息处理] TN713.6[电子电信—信息与通信工程]