GNSS导航电文鲁棒性影响因素分析  

Analysis of influence factors on robustness performance of GNSS navigation messages

作　　者：克兢 卢晓春[1,2,4] 王雪 陈校非[1,2,3] 唐升 KE Jing;LU Xxiao-chun;WANG Xue;CHEN Xiao-fei;TANG Sheng(National Time Service Center,Chinese Academy of Sciences,Xi'an 710600,China;Key Laboratory of Precise Positioning and Timing Technology,Chinese Academy of Sciences.Xi'an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 101048,China;School of Electronic,Eleclrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 101048,China;School of Information Science and Technology,North west University,Xi'an 710127,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院精密导航定位与定时技术重点实验室,西安710600 [3]中国科学院大学,北京100049 [4]中国科学院大学天文与空间科学学院,北京101048 [5]中国科学院大学电子电气与通信工程学院,北京101048 [6]西北大学信息科学与技术学院,西安710127

出　　处：《时间频率学报》2018年第4期362-368,共7页Journal of Time and Frequency

基　　金：国家自然科学基金青年基金资助项目(11403018)

摘　　要：GNSS(Global Navigation Satellite System)导航电文为用户接收机提供定位解算所需的卫星钟差改正参数和广播星历参数等,其鲁棒性关系到整个导航系统的可靠性。总结了影响GNSS导航电文鲁棒性的主要因素,研究了电文解调门限、接收信噪比和信号传播信道对电文鲁棒性的影响,通过仿真分析了以上3个因素对GPS(Global Positioning System),Galileo和BDS(Beidou Navigation Satellite System)区域信号电文鲁棒性的贡献,分别给出了上述信号以其系统规定的最低接收信噪比和相同接收信噪比两种接收条件下的电文鲁棒性比较结果,对导航电文的鲁棒性设计具有一定参考价值。The message of Global Navigation Satellite System provides satellite clock corrections and ephemeris data for user receivers to compute the PVT solution,and the robustness of the message has a great impact on the reliability for GNSS system.The main factors influencing the robustness of the navigation message is summarized,and the influence of the demodulation threshold,received signal-to-noise ratio,and signal propagation channel on the robustness is studied.The contribution of the three factors to the robustness of the messages of GPS,Galileo and BDS regional system is analyzed,and the performance is discussed and compared among these messages with the signal-to-noise ratio of the minimum level specified in the system specifications and of the same level respectively.The results are of reference value for robust design of satellite navigation message.

关 键 词：GNSS导航电文 鲁棒性 编码 卫星信道 

分 类 号：P228.4[天文地球—大地测量学与测量工程]