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In-Depth Analysis of Unmodulated Visible Light Positioning Using the Iterated Extended Kalman Filter.

Published on Nov 27, 2019in Sensors3.031
· DOI :10.3390/S19235198
Robin Amsters , Eric Demeester13
Estimated H-index: 13
+ 1 AuthorsPeter Slaets6
Estimated H-index: 6
Abstract
Indoor positioning with visible light has become increasingly important in recent years. Usually, light sources are modulated at high speeds in order to wirelessly transmit data from the fixtures to a receiver. The accuracy of such systems can range from a few decimeters to a few centimeters. However, additional modulation hardware is required for every light source, thereby increasing cost and system complexity. This paper investigates the use of unmodulated light for indoor positioning. Contrary to previous work, a Kalman filter is used instead of a particle filter to decrease the computational load. As a result, the update rate of position estimation can be higher. Additionally, more resources could be made available for other tasks (e.g., path planning for autonomous robots). We evaluated the performance of our proposed approach through simulations and experiments. The accuracy depends on a number of parameters, but is generally lower than 0.5 m. Moreover, temporary occlusion of the receiver can be compensated in most cases.
  • References (10)
  • Citations (1)
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References10
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#1Helin Yang (NTU: Nanyang Technological University)H-Index: 3
#2Pengfei Du (NTU: Nanyang Technological University)H-Index: 5
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In this letter, an intelligent resource allocation framework based on model-free reinforcement learning (RL) is first presented for multi-user integrated visible light communication and positioning (VLCP) systems, in order to maximize the sum rate of users while guaranteeing the users’ minimum data rates and positioning accuracy constraints. The learning framework can learn the optimal policy under unknown environment’s dynamics and the continuous-valued space, and a reward function is proposed ...
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#2Sheng Zhang (NTU: Nanyang Technological University)H-Index: 4
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In this paper, a low-complexity time-difference-of-arrival (TDOA) based indoor visible light positioning (VLP) system using an enhanced practical localization scheme based on cross correlation is proposed and experimentally demonstrated. The proposed TDOA scheme offers two advantages: 1) the use of virtual local oscillator to replace the real local oscillator for cross correlation at the receiver side so as to reduce the hardware complexity; 2) the application of cubic spline interpolation on th...
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This paper attempts to clarify the difference between visible light communication (VLC) and light-fidelity (LiFi). In particular, it will show how LiFi takes VLC further by using light emitting diodes (LEDs) to realise fully networked wireless systems. Synergies are harnessed as luminaries become LiFi attocells resulting in enhanced wireless capacity providing the necessary connectivity to realise the Internet-of-Things, and contributing to the key performance indicators for the fifth generation...
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