Islam Saiful, Bhuiyan Mohammad Zahidul H, Thombre Sarang, Kaasalainen Sanna
Finnish Geospatial Research Institute (FGI-NLS), 02430 Kirkkonummi, Finland.
u-blox Espoo Oy, 02600 Espoo, Finland.
Sensors (Basel). 2022 Mar 16;22(6):2294. doi: 10.3390/s22062294.
Today, a substantial portion of global trade is carried by sea. Consequently, the reliance on Global Navigation Satellite System (GNSS)-based navigation in the oceans and inland waterways has been rapidly growing. GNSS is vulnerable to various radio frequency interference. The objective of this research is to propose a resilient Multi-Frequency, Multi-Constellation (MFMC) receiver in the context of maritime navigation to identify any GNSS signal jamming incident and switch to a jamming-free signal immediately. With that goal in mind, the authors implemented a jamming event detector that can identify the start, end, and total duration of the detected jamming event on any of the impacted GNSS signal(s). By utilizing a jamming event detector, the proposed resilient MFMC receiver indeed provides a seamless positioning solution in the event of single-frequency jamming on either the lower or upper L-band. In addition, this manuscript also contains positioning performance analysis of GPS-L5-only, Galileo-E5a-only, and Galileo-E5b-only signals and their multi-GNSS combinations in a maritime operational environment in the Gulf of Finland. The positioning performance of lower L-band GNSS signals in a maritime environment has not been thoroughly investigated as per the authors' knowledge.
如今，全球贸易的很大一部分是通过海运进行的。因此，海洋和内陆水道对基于全球导航卫星系统（GNSS）的导航的依赖一直在迅速增长。GNSS容易受到各种射频干扰。本研究的目的是在海上导航的背景下提出一种弹性多频多星座（MFMC）接收机，以识别任何GNSS信号干扰事件，并立即切换到无干扰信号。出于这一目标，作者实现了一种干扰事件检测器，该检测器可以识别任何受影响的GNSS信号上检测到的干扰事件的开始、结束和总持续时间。通过使用干扰事件检测器，所提出的弹性MFMC接收机确实在较低或较高L波段发生单频干扰的情况下提供了无缝定位解决方案。此外，本文还包含了在芬兰湾海上作业环境中仅GPS-L5、仅伽利略-E5a和仅伽利略-E5b信号及其多GNSS组合的定位性能分析。据作者所知，海上环境中较低L波段GNSS信号的定位性能尚未得到充分研究。
