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Combining Augmented Reality and 3D Printing to Display Patient Models on a Smartphone

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An Effective GNSS/PDR Fusion Positioning Algorithm on Smartphones for Challenging Scenarios.

Jingkui Zhang^1,2, Baoguo Yu^1,2, Yuxiang Ge³

¹State Key Laboratory of Satellite Navigation System and Equipment Technology, Shijiazhuang 050081, China.

Sensors (Basel, Switzerland)

|March 13, 2024

Summary

This summary is machine-generated.

Pedestrian dead reckoning (PDR) assists Global Navigation Satellite System (GNSS) positioning in complex environments. This fusion enhances reliability and stability for smart city applications.

Keywords:

GNSS/PDR fusion positioning real-time positioning seamless indoor/outdoor positioning smartphone urban informatization and smart cities

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Area of Science:

Geomatics Engineering
Sensor Fusion
Mobile Computing

Background:

Global Navigation Satellite System (GNSS) offers location services but struggles with reliability in complex environments like urban canyons and tunnels.
Smartphone sensors are crucial for augmenting GNSS to achieve stable and accurate positioning.

Purpose of the Study:

To investigate Global Navigation Satellite System (GNSS) positioning algorithms enhanced by pedestrian dead reckoning (PDR) in challenging scenarios.
To evaluate the performance of GNSS/PDR fusion positioning across diverse environmental conditions.

Main Methods:

Developed a step detection algorithm using acceleration modulus peak-valley analysis.
Employed the Weinberg model and Mahony algorithm for PDR step length and heading estimation.
Implemented and evaluated GNSS/PDR fusion positioning in open, semi-open, and blocked environments.

Main Results:

Validated the effectiveness of PDR in assisting GNSS positioning within complex environments.
Demonstrated significant improvements in positioning reliability and stability through multisource sensor fusion.
Developed a real-time GNSS/PDR positioning software (CUMT-POS v1.0) on Android.

Conclusions:

Pedestrian dead reckoning (PDR) significantly enhances GNSS positioning accuracy and robustness in challenging environments.
Multisource sensor fusion is key to achieving reliable positioning for urban informatization and smart city initiatives.