ArticleSensors (Basel, Switzerland)2021
LOCATE-US: Indoor Positioning for Mobile Devices Using Encoded Ultrasonic Signals, Inertial Sensors and Graph-Matching.
Article in Sensors (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Novel Filter-Based Excitation Method for Pulse Compression in Ultrasonic Sensory Systems.Sensors (Basel, Switzerland) · 2025Article
- Multisensory System for Long-Term Activity Monitoring to Facilitate Aging-in-Place.Sensors (Basel, Switzerland) · 2023Article
- Indoor Positioning Design for Mobile Phones via Integrating a Single Microphone Sensor and anSensors (Basel, Switzerland) · 2023Article
- Inertial Indoor Pedestrian Navigation Based on Cascade Filtering Integrated INS/Map Information.Sensors (Basel, Switzerland) · 2022Article
- Smartphone-Based Social Distance Detection Technology with Near-Ultrasonic Signal.Sensors (Basel, Switzerland) · 2022Article
- Simulation Tool and Online Demonstrator for CDMA-Based Ultrasonic Indoor Localization Systems.Sensors (Basel, Switzerland) · 2022Article
- Dynamic Adjustment of Weighted GCC-PHAT for Position Estimation in an Ultrasonic Local Positioning System.Sensors (Basel, Switzerland) · 2021Article
- Using Perspective-n-Point Algorithms for a Local Positioning System Based on LEDs and a QADA Receiver.Sensors (Basel, Switzerland) · 2021Article
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Authors and funding
8 authors.
Funding
Abstract
Indoor positioning remains a challenge and, despite much research and development carried out in the last decade, there is still no standard as with the Global Navigation Satellite Systems (GNSS) outdoors. This paper presents an indoor positioning system called LOCATE-US with adjustable granularity for use with commercial mobile devices, such as smartphones or tablets. LOCATE-US is privacy-oriented and allows every device to compute its own position by fusing ultrasonic, inertial sensor measurements and map information. Ultrasonic Local Positioning Systems (U-LPS) based on encoded signals are placed in critical zones that require an accuracy below a few decimeters to correct the accumulated drift errors of the inertial measurements. These systems are well suited to work at room level as walls confine acoustic waves inside. To avoid audible artifacts, the U-LPS emission is set at 41.67 kHz, and an ultrasonic acquisition module with reduced dimensions is attached to the mobile device through the USB port to capture signals. Processing in the mobile device involves an improved Time Differences of Arrival (TDOA) estimation that is fused with the measurements from an external inertial sensor to obtain real-time location and trajectory display at a 10 Hz rate. Graph-matching has also been included, considering available prior knowledge about the navigation scenario. This kind of device is an adequate platform for Location-Based Services (LBS), enabling applications such as augmented reality, guiding applications, or people monitoring and assistance. The system architecture can easily incorporate new sensors in the future, such as UWB, RFiD or others.
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Registered trials
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