Comparison of VLC-based indoor positioning techniques

Zhang, W.; Kavehrad, M.

doi:10.1117/12.2001569

Cited by 56 publications

(48 citation statements)

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“…As we show in the following, ǫ k should be chosen as a function of the terminal location during channel estimation, i.e., p 1 in Figure 2. Location information could be obtained from channel estimation itself using various positioning techniques [31], [32]. Referring to Figure 2, we denote L as the bound for the user movement between two CSI updates, i.e., p 1 − p 2 2 ≤ L. Furthermore, considering a single transmitter, let d v and d h be the vertical and horizontal distance between transmitter and receiver, respectively, as indicated in Figure 2.…”

Section: A Uncertainty Modelsmentioning

confidence: 99%

Coordinated Broadcasting for Multiuser Indoor Visible Light Communication Systems

Lampe

Hranilovic

2015

IEEE Trans. Commun.

148

135

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Visible light communication (VLC) re-uses illumination devices, in particular light-emitting diodes (LEDs), for communication purposes. It has great potential to alleviate the strain on radio frequency spectrum in indoor environments. VLCenabled LED luminaries form VLC attocells that carry downlink data traffic to indoor mobile or stationary terminals. While one of the advantages of indoor VLC is low interference due to natural cell boundaries such as walls, multiple VLC attocells within a room would interfere. This is because illumination requirements often mandate a rich overlap of emissions of luminaries in a room. In this paper, we suggest the coordination of multiple VLC attocells (i.e., VLC-enabled LED luminaries) to turn the problem of overlap and thus interference into an advantage. We stipulate that this coordination can be accomplished through power line communication (PLC), which has been considered before as a means to transport data to VLC transmitters. Borrowing from concepts developed for radio-frequency wireless communications, we develop several precoding schemes for the new coordinated VLC broadcasting architecture. These include designs for the case of imperfect channel knowledge at the VLC transmitter, since channel information is usually provided through a lowrate feedback channel. The performance advantages for VLC transmission due to the proposed coordination and precoding designs are demonstrated based on a set of numerical results.

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Section: A Uncertainty Modelsmentioning

confidence: 99%

Coordinated Broadcasting for Multiuser Indoor Visible Light Communication Systems

Lampe

Hranilovic

2015

IEEE Trans. Commun.

148

135

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“…VLC application scenarios span from indoor communication [19], indoor localization [14,18,31], screen-camera communication [5,11,13,21], vehicular networks [20,4], underwater communication [26], to in-flight entertainment [24]. In particular, [20] is the first to build a VLC prototype for vehicular network and examine the networking properties in real outdoor systems.…”

Section: Vlc Applicationsmentioning

confidence: 99%

Visible light networking and sensing

Zhou

Campbell

2014

Proceedings of the 1st ACM Workshop on Hot Topics in Wireless

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We propose for the first time an integrated Visible Light Communication (iVLC) system, which combines scalable VLC networking and accurate VLC sensing of mobile users. To meet this goal, we envision using modulated LED lights for communications between networked devices, while at the same time using the very same lights to accurately identify and track users, and importantly, sense and infer their gestures (e.g., pointing to an object in the room) as a means of collecting user analytics and enabling interactions with objects in smart spaces. Enabling the iVLC vision requires reliable VLC networking and robust VLC sensing. We discuss the key research components and open challenges in realizing this vision. By combining VLC networking and sensing, iVLC opens the way for a new class of contextaware applications and a new HCI paradigm not possible before.

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“…The accuracy of proximity‐based positioning system relies upon a dense grid of reference points, each having a well‐known position. Therefore, this system theoretically provides accuracy no more than the resolution of the grid itself . Experimental works utilizing proximity as visible light communication (VLC)–based indoor position system have an accuracy from 1 m to up to few meters .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, this system theoretically provides accuracy no more than the resolution of the grid itself. 5 Experimental works utilizing proximity as visible light communication (VLC)-based indoor position system have an accuracy from 1 m to up to few meters. 6,7 Furthermore, the limitation of current VLC proximity systems is that they still require support from wireless fidelity, ZigBee, or other wireless networks to fulfill the positioning operation.…”

Section: Introductionmentioning

confidence: 99%

Visible light‐based indoor localization using k‐means clustering and linear regression

Saadi

Saeed

Ahmad

et al. 2018

Trans Emerging Tel Tech

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Visible light positioning techniques employing received signal strength (RSS)–based fingerprints are becoming popular and ubiquitous. However, RSS is more susceptible to signal degradation and environmental changes resulting in location inaccuracies. To minimize these limitations, clustering in conjunction with linear regression is applied to RSS database made up of light intensity variations of light emitting diodes. Optimum cluster size is determined and trained clusters are exploited for location assessment by curtailing the difference between the database readings and cluster centroids. Regression is then applied on the clustered data, which partitions it further and helps refining the results. Simulation results of the proposed algorithm dictate a significant improvement in location estimation accuracy of up to 40 cm in an indoor environment with the dimensions of 5 m × 5 m × 4 m and exhibit superior performance than many state‐of‐the‐art RSS‐based methods.

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Comparison of VLC-based indoor positioning techniques

Cited by 56 publications

References 0 publications

Coordinated Broadcasting for Multiuser Indoor Visible Light Communication Systems

Coordinated Broadcasting for Multiuser Indoor Visible Light Communication Systems

Visible light networking and sensing

Visible light‐based indoor localization using k‐means clustering and linear regression

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