一个混合光无线网络用于十米级的地面定位
Jeroen C J Koelemeij1, Han Dun2, Cherif E V Diouf2
1Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
Nature
|November 17, 2022
概括
一个新的地面定位系统提供了可靠的十米级准确度和分纳秒计时,独立于全球导航卫星系统 (GNSS). 这项技术可减轻多路径错误,对于关键基础设施和未来的自主系统至关重要.
科学领域:
- 导航系统
- 电信工程
- 地理学
背景情况:
- 全球导航卫星系统 (GNSS) 对于导航和计时至关重要,但由于多路径传播和天空阻碍,在城市环境中存在精度限制 (米级错误).
- 对于移动网络,自动驾驶和能源网络等关键基础设施,GNSS的漏洞和缺少备份系统构成重大风险.
- 准确的定位和可靠的时间对于下一代技术来说越来越重要.
研究的目的:
- 展示一个新的地面定位系统,提供GNSS独立的导航和定时服务.
- 在具有挑战性,多路径的户外环境中实现强大的十米级定位和分纳秒计时.
- 展示电信网络提供超越连接的高精度定位和定时的潜力.
主要方法:
- 通过光纤以太网网络同步使用一组无线电发射器的地面定位系统的开发.
- 实施光学和无线传输方案,与移动通信网络进行并行.
- 利用光谱效率高的虚拟宽带信号来缓解多路径传播效应.
主要成果:
- 在多路线的户外环境中实现了强大的十米级定位.
- 证明了纳米秒的时间准确性.
- 成功减轻多路径传播的有害影响,这是GNSS的一个常见问题.
结论:
- 与GNSS相比,开发的地面系统在具有挑战性的环境中提供了更高的性能和可靠性.
- 这项技术为电信网络提供集成的,高精度的定位和定时服务铺平了道路.
- 该系统解决了对GNSS独立解决方案的关键需求,提高了基本服务和新兴技术的弹性.
相关概念视频
01:28Field Application of Global Positioning System
86
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...
86
01:30Types of Global Positioning System Surveys
106
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...
106
01:26Errors in Global Positioning System
94
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,...
94
01:30Electronic Distance Measuring Instruments
81
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...
81
01:30Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
157
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...
157
01:30Introduction to Global Positioning System
127
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,...
127