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Indoor Positioning Design for Mobile Phones via Integrating a Single Microphone Sensor and an H2 Estimator
Yung-Hsiang Chen1, Pei-Yu Chang2, Yung-Yue Chen3
1Department of Mechanical Engineering, National Pingtung University of Science and Technology, Pingtung 912301, Taiwan.
Sensors (Basel, Switzerland)
|February 11, 2023
Summary
This study introduces an indoor positioning system for mobile phones using a microphone and H2 estimator. Accurate sound pressure level estimation is key to overcoming environmental noise and achieving precise location tracking.
Area of Science:
- Acoustics
- Signal Processing
- Mobile Computing
Background:
- Indoor positioning systems (IPS) face challenges due to environmental factors affecting signal strength.
- Accurate estimation of sound pressure level (SPL) is critical for reliable indoor localization.
- Existing methods are often susceptible to signal variations caused by reverberation and reflection.
Purpose of the Study:
- To propose a novel indoor positioning design for mobile phones.
- To develop an H2 estimator integrated with a sound pressure level model.
- To mitigate the impact of environmental corruptions on received signal strength (RSS).
Main Methods:
- Integration of a single microphone sensor and an H2 estimator.
- Utilizing tagged sound sources with distinct frequencies.
- Development of a sound pressure level model to counter environmental influences.
Main Results:
- The H2 estimation design effectively mitigates RSS variations.
- Achieved an average positioning root mean square (RMS) error of 0.75 meters.
- Demonstrated robust performance even under heavy environmental corruptions.
Conclusions:
- Accurate SPL estimation is paramount for satisfactory indoor positioning performance.
- The proposed H2 estimation design offers a promising solution for accurate indoor localization.
- The system shows potential for practical application in mobile indoor navigation.
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