Locata定位系统的时间同步机制  

Time Synchronization Mechanism for Locata Positioning System

作　　者：陈健熊 彭良福[1] 黄勤珍[1] CHEN Jianxiong;PENG Liangfu;HUANG Qinzhen(School of Electrical and Information Engineering,Southwest Minzu University,Chengdu 610041, China)

机构地区：[1]西南民族大学电气信息工程学院,四川成都610041

出　　处：《全球定位系统》2018年第2期54-59,共6页Gnss World of China

基　　金：四川省科技厅重点研发项目(编号:17ZDYF1495);西南民族大学研究生创新型科研项目(编号:CX2017SP280)

摘　　要：Locata系统是一种新型的高精度地基定位系统,它既可以与现有的全球导航卫星系统(GNSS)无缝对接,也可以在卫星信号失效时独立提供定位服务。Locata系统的定位精度可以达到厘米级,其关键技术是高精度(纳秒级)的时间同步技术。文中通过分析Locata系统的定位原理,对Locata系统独特的时间同步技术进行了研究,详细描述了其时间同步机制和技术实现方案,并给出了时间同步的具体流程和步骤。该研究可为我国研制地基伪卫星定位系统提供参考。Locata system is a new-type of high-precision foundation positioning system.It can be not only seamlessly connected with the existing Global Satellite Navigation System（GNSS）,but also provide the positioning service independently when the satellite signal fails.The positioning accuracy of Locata system can reach centimeter level,and its key technology is high-precision（nanosecond level）time synchronization technology.In this paper,by analyzing the positioning principle of Locata system and studying its unique time synchronization technology,the time synchronization mechanism of the system and its technical implementing scheme are described in detail,and the specific process and steps for time synchronization are also given.This study can provide a reference for China＇s development of foundation pseudo satellite positioning system.

关 键 词：Locata系统 地基定位 时间同步 伪卫星 

分 类 号：TN966[电子电信—信号与信息处理]