在高动态平台上增强GNSS可靠性:对干扰环境中的多频,多星座信号进行比较研究
Abdelsatar Elmezayen1,2, Malek Karaim1, Haidy Elghamrawy1
1Electrical and Computer Engineering Department, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada.
Sensors (Basel, Switzerland)
|December 9, 2023
概括
多星座和多频率的全球导航卫星系统 (GNSS) 信号提高了导航系统对干扰的弹性. 结合GPS,利略和GLONASS,在干扰事件中确保高动态平台的连续准确定位.
科学领域:
- 导航和定位系统 导航和定位系统
- 卫星通信 卫星通信
- 信号处理 信号处理
背景情况:
- 全球导航卫星系统 (GNSS) 信号容易干扰,降低定位,导航和定时 (PNT) 服务的质量.
- 多频率和多星座GNSS提供了潜在的免疫力改善信号中断.
- 现有研究需要进一步调查GNSS信号在各种干扰条件下的弹性,特别是对于高动态平台.
研究的目的:
- 实验评估使用多频,多星座GNSS信号的好处,以提高干扰期间的接收器性能.
- 评估模拟和真实干扰信号对GPS,利略和GLONASS频率和星座的各种组合的影响.
- 确定不同GNSS配置对飞机和无人机等高动态平台的有效性.
主要方法:
- 利用Spirent和Orolia的GNSS信号模拟器,为两个不同的飞机轨迹路线生成射频信号.
- 研究了GPS,利略和GLONASS信号频率和星座的所有可能组合.
- 在模拟和真实干扰信号条件下实验评估接收器性能.
主要成果:
- 单个星座,多频GPS解决方案在低干扰场景下显示出有限的可靠定位.
- 综合使用GPS,利略和GLONASS信号显著提高了定位连续性和准确性.
- 综合多星座和多频GNSS方法在缓解低和高干扰强度的干扰效应方面被证明是有效的.
结论:
- 从多个GNSS星座 (GPS,利略,GLONASS) 采用多频信号对于在干扰的情况下进行可靠的导航至关重要.
- 与单个星座系统相比,联合GNSS解决方案为高动态平台提供了卓越的弹性和连续定位准确性.
- 这项研究验证了集成GNSS接收器对于面临信号中断的关键导航应用的增强性能.
相关概念视频
01:26Errors in Global Positioning System
46
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
46
01:28Field Application of Global Positioning System
49
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
49
01:30Introduction to Global Positioning System
63
The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
63
01:30Types of Global Positioning System Surveys
62
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
62
01:30Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
37
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
37
01:30Electronic Distance Measuring Instruments
37
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short...
37