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Updated: May 14, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Wireless Communication-Based Indoor Localization with Optical Initialization and Sensor Fusion.

Marcin Leplawy1, Piotr Lipiński1, Barbara Morawska1

  • 1Institute of Information Technology, Lodz University of Technology, al. Politechniki 8, 93-590 Lodz, Poland.

Sensors (Basel, Switzerland)
|May 13, 2026
PubMed
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This study introduces a novel indoor localization system using Wi-Fi signals and sensor fusion, eliminating the need for manual fingerprinting. It achieves accurate positioning for applications in challenging GPS-denied environments.

Area of Science:

  • Robotics and Automation
  • Wireless Communication Systems
  • Sensor Fusion

Background:

  • Indoor localization in Global Navigation Satellite System (GNSS)-denied areas is difficult due to unreliable wireless signals.
  • Traditional methods like fingerprinting are labor-intensive and require specialized infrastructure.

Purpose of the Study:

  • To develop a cost-effective and scalable indoor localization method using existing Wi-Fi networks.
  • To improve accuracy and reduce drift in indoor positioning by integrating optical and inertial sensors.

Main Methods:

  • Combines Wi-Fi Received Signal Strength Indication (RSSI) with optical pose estimation (ArUco markers) for initialization.
  • Utilizes inertial sensor fusion to compensate for motion between Wi-Fi measurements.
  • Employs a simplified factor graph for efficient fusion of heterogeneous data.
Keywords:
RSSIWi-Fi localizationindoor localizationinertial navigationoptical localizationsensor fusion

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Last Updated: May 14, 2026

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Main Results:

  • Achieved sub-meter localization accuracy with an average error of 0.40 meters.
  • Demonstrated effective reduction of inertial drift through sensor fusion.
  • Validated the method's real-time operational capability on mobile devices.

Conclusions:

  • The proposed method offers a low-cost, scalable solution for indoor positioning without specialized hardware.
  • It enhances navigation in environments like access-controlled areas, exhibitions, and large venues.