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Related Concept Videos

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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

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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,...
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Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

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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...
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Errors in Global Positioning System01:26

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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,...
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Electronic Distance Measuring Instruments01:30

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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...
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A Survey of Visible-Light-Communication-Based Indoor Positioning Systems.

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  • 1Guangzhou Institute, Xidian University, Guangzhou 510530, China.

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|August 29, 2024
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Summary
This summary is machine-generated.

Visible light communication (VLC)-based indoor positioning systems (IPSs) offer a high-accuracy, low-cost alternative to traditional methods. These systems demonstrate potential for precise indoor localization, overcoming GPS limitations.

Keywords:
indoor positioning systemlocalization schemeperformance comparisonsystem designvisible light communication

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Area of Science:

  • Indoor positioning systems
  • Visible light communication (VLC)
  • Localization technologies

Background:

  • Traditional positioning systems like GPS face significant limitations for indoor environments.
  • Visible light communication (VLC) has emerged as a promising alternative for indoor positioning.
  • VLC-based IPSs offer high accuracy, low cost, and energy efficiency.

Purpose of the Study:

  • To provide a comprehensive review and tutorial-like overview of VLC-based indoor positioning systems (IPSs).
  • To compare VLC-IPSs with traditional systems, highlighting limitations.
  • To explore optimization strategies and system parameters for enhanced performance.

Main Methods:

  • Comparative analysis of various positioning systems.
  • Discussion of VLC-based IPS mechanisms, performance metrics, and assumptions.
  • Examination of factors like channel modeling, signal processing, and localization algorithms.
  • Exploration of optimization strategies including modulation, encoding, power control, and algorithms.
  • Analysis of system parameters such as LED placement, receiver sensitivity, and transmit power.

Main Results:

  • VLC-based systems achieve localization accuracy within 10 cm in controlled environments.
  • Analysis of complexity, operating range, and efficiency based on key factors.
  • Demonstration of the impact of system parameters on energy efficiency and accuracy.

Conclusions:

  • VLC-based IPSs present a viable and effective solution for indoor positioning.
  • Optimization strategies and careful system parameter selection are crucial for maximizing performance.
  • This review offers in-depth insights into the potential and challenges of VLC-based IPSs.