LED-tracking and ID-estimation for indoor positioning using visible light communication

In this work, a new Time Difference of Arrival (TDoA) scheme for distance measurement based on Optical Camera Communication (OCC) systems is proposed. It relies on the use of optical pulses instead of radio-frequency signals as the time reference triggers, and the introduction of a rolling shutter camera, whose characteristics allows substituting the timer modules used in conventional TDoA techniques by image processing of the illuminated area in the picture. This processing on the camera’s images provides time measurements and implies and specific analysis, which is presented in this work. The system performance and properties, such as resolution and range, mainly depends on the camera characteristics, such as the frames capture rate and the image quality. This new technique is suitable to be implemented in smartphones or other Commercial Off-The-Shelf (COTS) devices equipped with a camera and speakers.

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“…Nakazawa et al presented [41] a VLP system with LED tracking. The authors used a fisheye-lens-equipped camera with 160 • FOV.…”

Section: Camera-based Vlpmentioning

confidence: 99%

A Novel Ranging Technique Based on Optical Camera Communications and Time Difference of Arrival

Rabadán

Guerra

et al. 2019

Applied Sciences

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“…The study reported an accuracy of 0.06 m when the receiver was moving at an average speed of 1.3 m.s−1 in a room with dimensions 5×4×3 m3. The work in [13] utilises a fish-eye lens camera in conjunction with the Levenberg–Marquardt algorithm to estimate the receiver position with an accuracy better than 0.01 m. The authors in [14] carried out a comparative study of a Kalman filter and sequential importance sampling particle filters for positioning and tracking by measuring the RSS. The study concluded that the particle filter outperformed the Kalman filter at the expense of additional computational complexity.…”

Section: Introductionmentioning

confidence: 99%

Indoor Intruder Tracking Using Visible Light Communications

Alsalami

Ahmad

Zvánovec

et al. 2019

Sensors

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This paper proposes a comprehensive study of indoor intruder tracking using visible light communication (VLC). A realistic indoor VLC channel was developed, taking into consideration reflections, shadowing, and ambient noise. The intruder was considered smart and aiming to escape tracking. This was modelled by adding noise and disturbance to the intruder’s trajectory. We propose to extend the application of minimax filtering from state estimation in the radio frequency (RF) domain to intruder tracking using VLC. The performance of the proposed method was examined and compared with Kalman filter for both VLC and RF. The simulation results showed that the minimax filter provided marginally better tracking and was more robust to the adversary behavior of the intruder than Kalman filter, with less than 0.5 cm estimation error. In addition, minimax was significantly better than Kalman filter for RF tracking applications.

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“…A promising alternative solution is to utilize an image sensor (IS) as the receiver [14]- [18]. Work [17] employs a camera equipped with a fish-eye lens to capture more reference lights and improve the positioning accuracy.…”

Section: Introductionmentioning

confidence: 99%

Experimental Indoor Visible Light Positioning Systems With Centimeter Accuracy Based on a Commercial Smartphone Camera

Gong

2018

IEEE Photonics J.

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We consider indoor positioning based on visible light where the receiver adopts a commercial smartphone camera. Two positioning approaches are proposed, either the light emitting diode (LED) positions are known or not. When the LED positions are known, the LED light signal intensities are measured to identify the identity of each LED in the image. Triangular similarity is adopted to estimate the receiver position. When the LED positions are unknown, we develop a shift rotation model on the receiver movement and further propose a novel indoor positioning algorithm. The algorithm estimates the rotation center in the image instead of treating the image center as the rotation center, leading to reduced positioning error. To achieve high accuracy, a location reference point is set such that the positioning errors of multiple LEDs have little effect. According to the experimental results, the average positioning error can be reduced to 1 cm, which outperforms the reported experimental results with receiver-ceiling distance larger than 2 m.

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LED-tracking and ID-estimation for indoor positioning using visible light communication

Cited by 27 publications

References 7 publications

A Novel Ranging Technique Based on Optical Camera Communications and Time Difference of Arrival

A Novel Ranging Technique Based on Optical Camera Communications and Time Difference of Arrival

Indoor Intruder Tracking Using Visible Light Communications

Experimental Indoor Visible Light Positioning Systems With Centimeter Accuracy Based on a Commercial Smartphone Camera

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