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Related Experiment Videos

Precise Point Positioning Using World's First Dual-Frequency GPS/GALILEO Smartphone.

Abdelsatar Elmezayen1, Ahmed El-Rabbany2

  • 1Department of Civil Engineering, Ryerson University, Toronto M5B 2K3, Canada. abdelsatar.elmezayen@ryerson.ca.

Sensors (Basel, Switzerland)
|June 9, 2019
PubMed
Summary

Xiaomi Mi 8 smartphone achieves decimeter-level Global Navigation Satellite System (GNSS) precise point positioning (PPP) accuracy. This study evaluates its performance in post-processing and real-time modes using dual-frequency observations.

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Area of Science:

  • Geomatics Engineering
  • Satellite Navigation Systems
  • Low-Cost Sensor Technology

Background:

  • The advent of dual-frequency Global Navigation Satellite System (GNSS) capabilities in smartphones, exemplified by the Xiaomi Mi 8, presents a novel opportunity for high-precision positioning.
  • Ultra low-cost sensors integrated into consumer devices necessitate rigorous evaluation for advanced applications like precise point positioning (PPP).

Purpose of the Study:

  • To assess the Global Navigation Satellite System (GNSS) precise point positioning (PPP) accuracy of the Xiaomi Mi 8 smartphone.
  • To evaluate performance in both post-processing and real-time modes using dual-frequency observations.

Main Methods:

  • Collected raw dual-frequency GNSS observations from Xiaomi Mi 8 and a Trimble R9 receiver over two time windows.
Keywords:
DGNSSNAVCASTPPPXiaomi mi 8

Related Experiment Videos

  • Processed data using Trimble Business Center (TBC) for differential positioning reference solutions.
  • Utilized in-house PPP software with precise ephemeris (MGEX) for post-processing and NAVCAST service for real-time PPP (static and kinematic modes).

    • Main Results:

    • Decimeter-level positioning accuracy achieved in both post-processing and real-time precise point positioning (PPP) modes.
    • Meter-level positioning accuracy demonstrated in the kinematic mode for real-time PPP.

    Conclusions:

    • Dual-frequency GNSS smartphones, like the Xiaomi Mi 8, are capable of achieving high-precision positioning.
    • The technology shows promise for applications requiring decimeter accuracy, particularly in static and near-static scenarios.