Positioning Error Analysis of Ranging-Mode Using AIS Signals in China
Positioning Error Analysis of Ranging-Mode Using AIS Signals in China
复制标题
我国AIS信号测距模式定位误差分析
DOI：
10.1155/2016/6928961
复制
发表时间：
2016
影响因子：
1.9
通讯作者：
Zhang Jingbo
中科院分区：
文献类型：
--
作者：
Zheng Kai;Hu Qing;Zhang Jingbo
为了提供弹性位置、导航和时间（PNT）信息用于导航，鼓励使用自动识别系统（AIS）信号的测距模式（R-Mode）定位。精度是定位系统的关键，本文研究了我国AIS岸基站R模式定位的定位误差。从理论上分析了基于载波锁相环的高斯滤波最小频移键控（GMSK）解调的测量误差。针对AIS R模式定位中的到达时间（TOA）和到达时间差（TDOA）的精度因子（DOP），在两种测量机制下进行了讨论。对我国现有AIS岸基站在北、东、南海海域的定位误差分布进行了评估。在交通最密集的地区，定位精度达到米级，满足船舶导航的要求。
In order to provide resilient position, navigation, and time (PNT) information for -Navigation, the ranging-mode (R-Mode) positioning using automatic identification system (AIS) signals is encouraged. As the accuracy is the key for the positioning system, this paper investigates the position error of the R-Mode positioning based on AIS shore-based station in China. The measurement errors of Gaussian filtered minimum shift keying (GMSK) demodulation based on carrier phase locking loop are investigated in theory. The dilution of precision (DOP) for time of arrival (TOA) and time difference of arrival (TDOA) used in R-Mode positioning of AIS is discussed in two measurement mechanisms. The positioning error distributions in the North, East, and South Sea regions of China based on the existing AIS shore-based stations are evaluated. The positioning accuracy is at the meter level in the most traffic dense areas to meet the requirements for vessel navigation.