An enhanced multi-GNSS navigation algorithm by utilising a priori inter-system biases
An enhanced multi-GNSS navigation algorithm by utilising a priori inter-system biases
复制标题
利用先验系统间偏差的增强型多 GNSS 导航算法
DOI：
10.1017/s0373463317000637
复制
发表时间：
2017-09
影响因子：
2.4
通讯作者：
Kuang Cuilin
中科院分区：
文献类型：
--
作者：
Dong Zhounan;Cai Changsheng;Santerre Rock;Kuang Cuilin
多星座全球导航卫星系统（GNSS）测量数据的集成可以有效提高导航定位方案的精度和可靠性，而系统间偏差（ISB）是影响系统兼容性的关键问题。ISB传统上被估计为一个未知参数，以及三维位置坐标和相对于全球定位系统（GPS）时间的接收器时钟偏移。这种ISB估计将牺牲对每个综合GNSS系统的卫星观测。在卫星能见度有限的情况下，这些牺牲的观测可能是至关重要的。本研究提出了一种增强型多gnss导航算法，以避免在低能见度条件下牺牲观测值。该算法的主要思想是采用移动平均滤波器平滑在以前时代估计的isb。过滤后的值被用作当前纪元的先验信息。在开放天空和遮挡天空条件下进行了实验测试。结果表明，改进后的算法有效提高了遮挡天空条件下导航解的精度和可用性，其性能与传统的开放天空条件下ISB估计算法相当。在遮挡天空环境下，三维定位精度和可用性的提高率分别达到63%和21%。即使在只有4颗不同的GNSS卫星的情况下，使用增强算法仍然可以获得位置解。
The integration of multi-constellation Global Navigation Satellite System (GNSS) measurements can effectively improve the accuracy and reliability of navigation and positioning solutions, while the Inter-System Bias (ISB) is a key issue for compatibility. The ISB is traditionally estimated as an unknown parameter along with three-dimensional position coordinates and a receiver clock offset with respect to Global Positioning System (GPS) time. ISB estimation of this sort will sacrifice a satellite observation for each integrated GNSS system. These sacrificed observations could be vital in situations of limited satellite visibility. In this study, an enhanced multi-GNSS navigation algorithm is developed to avoid sacrificing observations under poor visibility conditions. The main idea of this algorithm is to employ a moving average filter to smooth the ISBs estimated at previous epochs. The filtered value is utilised as a priori information at the current epoch. Experimental tests were conducted to evaluate the enhanced algorithm under open and blocked sky conditions. The results show that the enhanced algorithm effectively improves the accuracy and availability of navigation solutions under the blocked sky condition, with performance being comparable to traditional ISB estimation algorithms in open sky conditions. The improvement rates of the three-dimensional position accuracy and availability reach up to 63% and 21% in the blocked sky environment. Even in the case of only four different GNSS satellites, a position solution can still be obtained using the enhanced algorithm.
登录
查看更多内容
基于四颗车联网卫星的伽利略信号及定位性能分析
影响因子：
2.4
作者：
Cai, Changsheng;Luo, Xiaomin;Liu, Zhizhao;Xiao, Qinqin
通讯作者：
Xiao, Qinqin
影响因子：
4.9
作者：
Nan Jiang;Yan Xu;Tianhe Xu;Guochang Xu;Zhangzhen Sun;H. Schuh
通讯作者：
Nan Jiang;Yan Xu;Tianhe Xu;Guochang Xu;Zhangzhen Sun;H. Schuh
DOI：
10.1007/978-3-642-37404-3_29
发表时间：
2013
期刊：
--
影响因子：
--
作者：
Junping Chen;Xiao Pei;Yize Zhang;Bin Wu
通讯作者：
Junping Chen;Xiao Pei;Yize Zhang;Bin Wu
北斗卫星导航系统反射测量（BDS-R）的海平面变化：初步结果和评估
影响因子：
3.9
作者：
Jin, Shuanggen;Qian, Xiaodong;Wu, X.
通讯作者：
Wu, X.
GPS/GLONASS组合精密单点定位建模与评估
影响因子：
4.9
作者：
Cai, Changsheng;Gao, Yang
通讯作者：
Gao, Yang