Pavlovčič-Prešeren Polona, Dimc Franc, Bažec Matej
Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova Cesta 2, SI-1000 Ljubljana, Slovenia.
Faculty of Maritime Studies and Transport, University of Ljubljana, Cesta Pomorščakov 4, SI-6320 Portorož, Slovenia.
Sensors (Basel). 2021 Feb 19;21(4):1446. doi: 10.3390/s21041446.
Jamming is becoming a serious threat to various users of global navigation satellite systems (GNSS). Therefore, live monitoring tests are required to estimate the sensitivity range of GNSS receivers under jamming. This study analyses the response of some mass-market and professional-grade receivers to intentional interferences based on different 3D jammer positions. First, the vertical jamming was investigated, followed by a horizontal experiment where the receivers were placed at three locations while the jammer was moving within a triangular area. The aim was to determine a fingerprint of the influence of the L1/E1 chirp jammer on receivers used in the research. The results show that low-cost receivers are much more susceptible to interference, while the latest generation of GNSS geodetic receivers are much more resilient. It is encouraging that positioning in the presence of jamming could be achieved on a larger scale, especially by using professional receivers. An attempt to position the jammer will be left for trials when a more frequency stable device is applied.
干扰正成为全球导航卫星系统（GNSS）各类用户面临的严重威胁。因此，需要进行实时监测测试，以评估GNSS接收机在干扰情况下的灵敏度范围。本研究基于不同的三维干扰源位置，分析了一些大众市场接收机和专业级接收机对故意干扰的响应。首先研究了垂直干扰，随后进行了水平实验，将接收机放置在三个位置，干扰源在一个三角形区域内移动。目的是确定L1/E1线性调频干扰对研究中使用的接收机影响的特征。结果表明，低成本接收机更容易受到干扰，而最新一代的GNSS大地测量接收机则更具抗干扰能力。令人鼓舞的是，尤其是通过使用专业接收机，在干扰环境下进行定位在更大范围内是可以实现的。当应用频率更稳定的设备时，将留待试验尝试对干扰源进行定位。
