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Errors in Global Positioning System

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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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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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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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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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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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BLE-Based Indoor Localization: Analysis of Some Solutions for Performance Improvement.

Filippo Milano1, Helbert da Rocha2,3, Marco Laracca4

  • 1Department of Electrical and Information Engineering, University of Cassino and Southern Lazio, 03043 Cassino, Italy.

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Summary

This study enhances indoor localization using Bluetooth Low Energy (BLE) 5.0 by comparing RSSI signal conditioning and positioning techniques. Multichannel transmission with RSSI aggregation significantly reduced positioning errors, improving BLE localization accuracy.

Keywords:
Bluetooth Low Energyindoor localizationlocalization solutions

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Area of Science:

  • Engineering
  • Computer Science
  • Signal Processing

Background:

  • Indoor localization systems are crucial for various applications.
  • Bluetooth Low Energy (BLE) 5.0 offers a promising technology for indoor positioning.
  • Existing BLE localization methods require further optimization and comparative analysis.

Purpose of the Study:

  • To experimentally analyze and compare different solutions for improving BLE-based indoor localization performance.
  • To identify the most effective techniques for enhancing the accuracy of BLE 5.0 localization systems.
  • To evaluate the impact of RSSI signal conditioning and positioning algorithms on localization error.

Main Methods:

  • Utilized an anchor-based system with Bluetooth Low Energy (BLE) 5.0 technology.
  • Employed Received Signal Strength Indicator (RSSI) for distance estimation.
  • Investigated various RSSI signal conditioning methods, distance estimation techniques, and position estimation approaches.
  • Conducted an experimental campaign in a complex, dynamic indoor environment with obstacles.

Main Results:

  • Multichannel transmission combined with RSSI signal aggregation demonstrated the most significant performance improvement.
  • The localization system's positioning error was reduced from 1.5 meters to approximately 1 meter.
  • Other examined solutions had a less pronounced impact, with varying effects on positioning errors based on their combination.

Conclusions:

  • Multichannel transmission and RSSI aggregation are highly effective for enhancing BLE indoor localization accuracy.
  • The study provides valuable insights into optimizing BLE 5.0 localization systems for complex environments.
  • Further research can build upon these findings to develop even more robust indoor positioning solutions.