摘要
强电离层闪烁会导致信号幅度深度衰减和载波相位激烈震荡,引起GPS载波跟踪环的失锁,从而导致定位误差增长甚至导航中断。本文研究了GPS L1软件接收机在经历强电离层闪烁时的信号处理算法。研究数据采集于构建于巴西的一个多GNSS多频段中频信号采集系统,数据采集时间为2013年11月,此年为太阳活动极大年。信号捕获、跟踪算法以及由载波跟踪环计算得出的闪烁指数(包活幅度指数S_4和载波相位指数σ_φ等)都在文中进行了详细阐述。分析强电离层闪烁对GPS软件接收机的影响对于研究卫星高级跟踪算法和提高GPS接收机的鲁棒性及定位精度将发挥重要作用。
Strong ionospheric scintillation may cause the signal amplitude＇s deep fading and the carrier phase＇s large fluctuation, which would lead to loss of lock on GPS carrier tracking loop, resulting in increased positioning error and even navigation interruption. This paper presents the software receiver processing results of GPS L1 signals undergoing strong ionosphere scintillation. The data used in this study were obtained from a multi-GNSS multi-band IF data collection system at Brazil in November 2013, which was a solar maximum year. Detailed signal acquisition and tracking algorithms and the scintillation indices are presented, which are calculated from carrier tracking loop outputs such as amplitude index S_4 and carrier phase index σ_φ. The influences of ionospheric scintillation on GPS software receiver are analyzed, which has significant value for designing the advanced tracking algorithms to improve the robustness and precision of the GPS receiver.
作者
祝雪芬
陈熙源
陈建锋
ZHU Xue-fen CHEN Xi-yuan CHEN Jian-feng(School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology of Ministry of Education, Southeast University, Nanjing 210096, China Automotive Engineering Research Institute, Jiangsu University, Zhenjiang 212013, China)
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2016年第4期480-484,共5页
Journal of Chinese Inertial Technology
基金
supported by National Natural Science Foundation of China(51405203)
Jiangsu Overseas Research and Training Program for University Prominent Young and Middle-aged Teachers and Presidents~~
关键词
电离层闪烁
GPS软件接收机
捕获
跟踪
ionospheric scintillation
GPS software receiver
acquisition
tracking
