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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

38
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,...
38
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

38
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...
38
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

25
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...
25
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

47
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,...
47
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

50
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...
50
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

62
A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
62

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Updated: Jun 10, 2025

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
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设计一种新的算法,以提高GPS拒绝环境中的UWB定位精度.

Yuansheng Huang1, Bo Cao2, Ao Wang1

  • 1School of Art Design, Zhejiang Guangsha Vocational and Technical University of Construction, Dongyang, 322100, China.

Scientific reports
|October 14, 2024
PubMed
概括

准确的室内定位对于物联网设备至关重要. 一个新的算法集成最大电流量标准 (MCC) 和无气味的卡尔曼波器 (UKF) 与最小平方 (LS) 增强了超宽带 (UWB) 系统在GPS拒绝环境中的准确性.

关键词:
在GPS拒绝的环境中.室内定位是指室内定位.定位精度 定位精度 定位精度最大电流度标准无气味的卡尔曼波器 (MCCUKF)超宽带 (UWB) 是指超宽带.

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科学领域:

  • 机器人和自动化 机器人和自动化
  • 信号处理 信号处理
  • 地理学工程 工程地质学

背景情况:

  • 准确的室内定位对于物联网 (IoT) 和智能设备至关重要.
  • 全球定位系统 (GPS) 在室内环境中无效,需要替代定位解决方案.
  • 超宽带 (UWB) 系统提供了精确室内定位的潜力,但容易受到噪音和异常因素的影响.

研究的目的:

  • 开发一种新的算法,以提高UWB系统在没有GPS的室内环境中的定位精度.
  • 为了减轻异常值和未知的工艺噪声对UWB定位准确度的影响.
  • 为室内物联网应用提供有效的定位方法.

主要方法:

  • 集成最大流标准 (MCC) 和无气味卡尔曼波器 (UKF) 用于测量距离的重建.
  • 应用最大值原理以减少异常影响和工艺噪声.
  • 使用最小平方 (LS) 进行初始位置估计和泰勒算法进行优化.

主要成果:

  • 与LS,KF-LS和UKF-LS方法相比,开发的MCCUKF-LS方法显著减少了根平均平方误差 (RMSE).
  • 与LS算法相比,整体平均RMSE减少了45.7%.
  • 在x,y和z轴定向方面,分别提高了51.4%,49.3%和55.1%的准确性.

结论:

  • 拟议的MCCUKF-LS融合技术有效地提高了室内UWB系统中目标节点 (TN) 的定位精度.
  • 该方法证明了对异常值和未知的工艺噪声的稳定性.
  • 这提供了一种有价值的新定位方法和参考,用于在GPS被拒绝的场景中室内定位.