Comparison of Radio Frequency and Visible Light Propagation Channels for Vehicular Communications

Cheng, Lin; Viriyasitavat, Wantanee; Boban, Mate; Tsai, Hsin-Mu

doi:10.1109/access.2017.2784620

Cited by 74 publications

(58 citation statements)

References 25 publications

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“…• The channel impulse response in indoor VLC systems consists typically of a LOS component and a non-LOS component (due to reflections from the room surfaces). The LOS component is commonly assumed to be dominant (even the strongest diffuse component is weak relative to the LOS components [91]) and the signal fading is negligible since almost no fading takes place in VLC channels due the large aperture size of the optical front-end as compared to the wavelength of the optical signal [92], [93]. This is a main difference from RF channels where multipath fading is common.…”

Section: A Key Design Considerationsmentioning

confidence: 99%

Multi-User Visible Light Communications: State-of-the-Art and Future Directions

et al. 2018

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Visible light communication (VLC) builds upon the dual use of existing lighting infrastructure for wireless data transmission. VLC has recently gained interest as cost-effective, secure, and energy-efficient wireless access technology particularly for indoor user-dense environments. While initial studies in this area are mainly limited to single-user point-to-point links, more recent efforts have focused on multi-user VLC systems in an effort to transform VLC into a scalable and fully networked wireless technology. In this paper, we provide a comprehensive overview of multi-user VLC systems discussing the recent advances on multi-user precoding, multiple access, resource allocation, and mobility management. We further provide possible directions of future research in this emerging topic.Index Terms-Visible light communication, multi-user communications, MIMO, precoding, non-orthogonal multiple access schemes, sum rate capacity, handover.

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Section: A Key Design Considerationsmentioning

confidence: 99%

Multi-User Visible Light Communications: State-of-the-Art and Future Directions

et al. 2018

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“…In this section, based on our simulations and discussions given in [32], [33], a comparison between ViLDAR and RADAR gun is provided in Table II. As shown in Table II, ViLDAR gives more flexibility in terms of the angle of incidence and beam-width with same high accuracy percentage. In terms of size, ViLDAR is expected to be much smaller as it only needs a PD, which can be very small in size similar to the PDs used in [5] and [34].…”

Section: Comparisonmentioning

confidence: 99%

ViLDAR—Visible Light Sensing-Based Speed Estimation Using Vehicle Headlamps

Abuella

Miramirkhani

Ekin

et al. 2019

IEEE Trans. Veh. Technol.

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The introduction of light emitting diodes (LED) in automotive exterior lighting systems provides opportunities to develop viable alternatives to conventional communication and sensing technologies. Most of the advanced driver-assist and autonomous vehicle technologies are based on Radio Detection and Ranging (RADAR) or Light Detection and Ranging (LiDAR) systems that use radio frequency or laser signals, respectively. While reliable and real-time information on vehicle speeds is critical for traffic operations management and autonomous vehicles safety, RADAR or LiDAR systems have some deficiencies especially in curved road scenarios where the incidence angle is rapidly varying. In this paper, we propose a novel speed estimation system so-called the Visible Light Detection and Ranging (ViLDAR) that builds upon sensing visible light variation of the vehicle's headlamp. We determine the accuracy of the proposed speed estimator in straight and curved road scenarios. We further present how the algorithm design parameters and the channel noise level affect the speed estimation accuracy. For wide incidence angles, the simulation results show that the ViLDAR outperforms RADAR/LiDAR systems in both straight and curved road scenarios.A provisional patent (US#62/541,913) has been obtained for this work.

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“…Some outdoor experiments successfully demonstrated data rate of the order of 1 Gb/s over hundred meters [ 20 ] and others are concentrating on the comparison between typical RF channels and optical ones in vehicular applications addressing the unique capabilities and limitations of the last ones [ 21 ]. In [ 13 ], the impact on V2V communications of realistic headlamp beam, road reflected light and photodiode (PD) position in the car is evaluated, showing how the height of the receiving PD can improve or decrease the performance.…”

Section: Related Work and Reference Standardmentioning

confidence: 99%

Vehicular Visible Light Networks for Urban Mobile Crowd Sensing

Masini

Bazzi

Zanella

2018

Sensors

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Crowd sensing is a powerful tool to map and predict interests and events. In the future, it could be boosted by an increasing number of connected vehicles sharing information and intentions. This will be made available by on board wireless connected devices able to continuously communicate with other vehicles and with the environment. Among the enabling technologies, visible light communication (VLC) represents a low cost solution in the short term. In spite of the fact that vehicular communications cannot rely on the sole VLC due to the limitation provided by the light which allows communications in visibility only, VLC can however be considered to complement other wireless communication technologies which could be overloaded in dense scenarios. In this paper we evaluate the performance of VLC connected vehicles when urban crowd sensing is addressed and we compare the performance of sole vehicular visible light networks with that of VLC as a complementary technology of IEEE 802.11p. Results, obtained through a realistic simulation tool taking into account both the roadmap constraints and the technologies protocols, help to understand when VLC provides the major improvement in terms of delivered data varying the number and position of RSUs and the FOV of the receiver.

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Comparison of Radio Frequency and Visible Light Propagation Channels for Vehicular Communications

Cited by 74 publications

References 25 publications

Multi-User Visible Light Communications: State-of-the-Art and Future Directions

Multi-User Visible Light Communications: State-of-the-Art and Future Directions

ViLDAR—Visible Light Sensing-Based Speed Estimation Using Vehicle Headlamps

Vehicular Visible Light Networks for Urban Mobile Crowd Sensing

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