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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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Related Experiment Video

Updated: Jan 4, 2026

Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
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LEO-Augmented GNSS Based on Communication Navigation Integrated Signal.

Lei Wang1, Zhicheng Lü2, Xiaomei Tang3

  • 1College of Electronic Science, National University of Defense Technology, Changsha 410073, China. w_lei_81@163.com.

Sensors (Basel, Switzerland)
|November 2, 2019
PubMed
Summary

Integrating Low Earth Orbit (LEO) communication signals with Global Navigation Satellite Systems (GNSS) can enhance positioning. Method 3, separating navigation signals, offers a higher carrier-to-noise density ratio (CN0) margin, crucial for improving GNSS performance.

Keywords:
GNSSIRIDIUMLEOburst signalcommunication and navigation integration

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Area of Science:

  • Satellite Systems Engineering
  • Signal Processing
  • Navigation Technology

Background:

  • Low Earth Orbit (LEO) augmentation offers significant benefits for Global Navigation Satellite System (GNSS) positioning.
  • Integrating communication and navigation signals in LEO systems presents challenges to communication performance.

Purpose of the Study:

  • To analyze and compare three methods for integrating communication and navigation signals in LEO-augmented GNSS.
  • To evaluate the influence of integration methods on communication performance using IRIDIUM signal parameters.

Main Methods:

  • Method 1: Superimposing a low-power navigation signal onto the communication signal.
  • Method 2: Transmitting the navigation signal within communication frames.
  • Method 3: Separating the navigation signal into a distinct frequency band.

Main Results:

  • Method 2 exhibited significantly lower pseudorange accuracy compared to Methods 1 and 3.
  • Doppler accuracy showed minimal differences across all three methods.
  • Method 1 is viable at a 15 dB communication-to-navigation signal power ratio, balancing accuracy and bit error rate (BER).
  • Method 3 achieved a 13.04 dB higher CN0 margin than Method 1.

Conclusions:

  • Method 1 offers high accuracy, while Method 3 provides a superior CN0 margin, addressing the low CN0 issue common in GNSS.
  • Method 3, despite causing communication capacity loss, is a promising choice for LEO-augmented GNSS.
  • Combining Methods 1 and 3 could potentially achieve both high accuracy and a high CN0 margin.