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相关概念视频

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

19
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...
19
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

37
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,...
37
Errors in Global Positioning System01:26

Errors in Global Positioning System

22
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,...
22
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

36
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...
36
Azimuths and Bearings01:19

Azimuths and Bearings

46
Azimuths and bearings are essential concepts in surveying, providing methods to express the direction of a line relative to a meridian. Azimuths refer to the clockwise angle measured from the north end of a reference meridian to the given line, ranging from zero to 360 degrees. This method gives a comprehensive directional reference within a full 360-degree circle, making it a straightforward way to communicate direction in various fields, including navigation, cartography, and...
46
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

14
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...
14

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一个光束方向向量跟踪GNSS软件定义接收器,用于稳健的定位.

Scott Burchfield1, Charles Givhan2, Scott Martin2

  • 1Integrated Solutions for Systems (IS4S), Auburn, AL 36830, USA.

Sensors (Basel, Switzerland)
|April 28, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一个新的全球导航卫星系统 (GNSS) 接收器,它结合了矢量跟踪循环和光束方向. 这种先进的GNSS接收器在具有挑战性的环境中改善了定位和信号跟踪.

关键词:
在GNSS中使用GNSS.线阵列是一种天线阵列.强大的导航导航.软件定义的无线电.矢量跟踪 追踪 矢量跟踪 追踪

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科学领域:

  • 导航系统 导航系统
  • 信号处理 信号处理
  • 天线理论天线理论

背景情况:

  • 全球导航卫星系统 (GNSS) 对动态平台至关重要,但易受干扰,信号阻塞和多路径效应的影响.
  • 矢量跟踪循环和受控接收模式天线 (CRPA) 在降低信号条件下提供了增强的弹性.
  • 现有的GNSS接收器在动态和多路径丰富的环境中扎着性能退化.

研究的目的:

  • 开发和评估一种新的软件定义无线电 (SDR) 接收器,将矢量跟踪循环与相位天线阵列集成在一起,用于数字束方向.
  • 为了减轻信号退化和多路径干扰对GNSS定位和跟踪的不利影响.
  • 在具有挑战性的动态场景中增强GNSS接收器的稳定性和持续运行.

主要方法:

  • 为软件定义无线电 (SDR) 平台实现算法.
  • 矢量跟踪循环与相位天线阵列的集成,用于自适应光束转向.
  • 在多路径丰富的环境中使用实时天空数据测试拟议的接收器,并与传统和商业接收器进行性能比较.

主要成果:

  • 光束方向接收器显示预期的信号放大.
  • 在定位和信号跟踪准确性方面,带有光束定向的矢量跟踪显著超过了传统的标尺接收器和商业接收器.
  • 拟议的接收器在商业接收器无法追踪退化信号的环境中保持连续测量.

结论:

  • 矢量跟踪循环和数字光束转向的组合提供了一个强大的解决方案,用于在具有挑战性的环境中提高GNSS性能.
  • 这种综合方法增强了对干扰,多路径和信号退化的弹性,从而实现了卓越的定位和跟踪.
  • 开发的SDR接收器为在不利条件下运行的动态平台提供了与传统GNSS接收器相比的显著进步.