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Hybrid visible light communications in Intelligent Transportation Systems with position based services
2012
2012 IEEE Globecom Workshops
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compared with a VLC system. ...
This paper proposes a hybrid communication system for Intelligent Transportation System (ITS) utilizing visible light and radio communications for position-based services. ...
The traffic light sends the optical CDMA spreading code repeatedly. ...
doi:10.1109/glocomw.2012.6477761
dblp:conf/globecom/0005CNLS12
fatcat:w32duzlypfbn7ko7m552dpoana
New construction of OVSF-OZCZ codes in multi-rate quasi-synchronous CDMA VLC systems for IoT applications
2020
IEEE Access
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In this paper, we propose a novel quasi-synchronous code division multiple access (QS-CDMA) visible light communication (VLC) system for IoT network. ...
The numerical results indicate that the new construction can eliminate MAI and PIIN, which can achieve high quality transmission in the multi-rate QS-CDMA-VLC system for IoT applications. ...
That is, quasisynchronous CDMA (QS-CDMA) should be considered for the IoT network based on VLC technology [23] . ...
doi:10.1109/access.2020.3009847
fatcat:oghicytra5cg7l4mkthoyuilbu
Doubly Orthogonal Wavelet Packets for Multi-Users Indoor Visible Light Communication Systems
2019
Photonics
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The simulated results illustrate that the doubly orthogonal signature waveform-based DWT-MC-CDMA with MMSE detection scheme outperforms the Walsh code-based multi-user system. ...
In this article, a multi-user VLC system is designed using a Discrete Wavelet Transform (DWT) that eradicates the use of cyclic prefix due to the good orthogonality and time-frequency localization properties ...
In [37, 38] , Guerra et al. demonstrate the low-cost practical implementation of optical CDMA-based VLC system that employs Random Optical Codes (ROC) as signature waveforms. ...
doi:10.3390/photonics6030085
fatcat:qphrkjoqgfb6lntv4dwtzieji4
A New Code Family for QS-CDMA Visible Light Communication Systems
2018
Journal of Telecommunications and Information Technology
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Visible light communication (VLC) is a promising technology for wireless communication networks. Optical code division multiple access (OCDMA) is a strong candidate for VLC-based applications. ...
The numerical results obtained show that the proposed codes significantly reduce MAI, compared to ZCC, as well as ZCZ codes. ...
Conclusion In this paper, we evaluate the performance of an optical QS-CDMA VLC system. ...
doi:10.26636/jtit.2018.124318
fatcat:hjpxkr76dbem5grapdj27e5yha
A Survey of NOMA for VLC Systems: Research Challenges and Future Trends
2022
Sensors
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The power domain nonorthogonal multiple access (PD-NOMA) scheme is envisioned to address several challenges in VLC systems. In this paper, we present a detailed overview of PD-NOMA based VLC systems. ...
Moreover, we introduce insights on some PD-NOMA VLC system constraints and challenges such as power allocation, clipping effect, MIMO and security. ...
Several OMA techniques are studied in VLC systems such as optical TDMA (OTDMA), optical CDMA (OCDMA), wavelength division multiple access (WDMA) and OFDMA. ...
doi:10.3390/s22041395
pmid:35214296
pmcid:PMC8962994
fatcat:qhjvxjkt2jcptm7cfsyot6wk6u
Artificial Intelligence and Radio Networks
2020
IEEE wireless communications
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In the third article, "VLC-CDMA Systems Based on Optical Complementary Codes", Y. ...
., propose a visible light communication code division multiple access (VLC-CDMA) system using optical complementary codes (OCCs), which are unipolar codes with a multiple sub-codes structure. ...
doi:10.1109/mwc.2020.9023914
fatcat:tyo2ksz755c7fm4l7tzmdxlgya
Multi-User Visible Light Communications: State-of-the-Art and Future Directions
2018
IEEE Access
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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 ...
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. ...
The commonly used spreading codes are the one-dimensional codes such as Gold sequences, optical orthogonal codes and prime codes and the two-dimensional orthogonal optical codes. ...
doi:10.1109/access.2018.2879885
fatcat:y7ltnuy4yjfzzggeaolnasttz4
Optical Wireless Communication Systems, A Survey
[article]
2018
arXiv
pre-print
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Optical wireless communication (OWC) systems are among the promising solutions to the bandwidth limitation problem faced by radio systems. ...
Infrared communication (IRC) and visible light communication (VLC) are presented as potential implementation approaches for OWC systems and are comprehensively discussed. ...
Multi-carrier (MC) is another approach investigated in [171] , [172] based on CDMA. MC-CDMA combines features of CDMA and OFDM. ...
arXiv:1812.11544v1
fatcat:zs5hqlbf55clpnco56rwwiuvdi
Visible Light Communication [VLC] and its Applications
2019
IARJSET
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For overcoming these limitations, a new method is adopted ie, Visible Light Communication [VLC]. ...
The most of the existing communication systems uses radio frequency. In radio communication, information's such as sound, images are carried by radio waves. ...
Keying[CSK] modulation and Code Division Multiple Access[CDMA]. ...
doi:10.17148/iarjset.2019.6213
fatcat:s2piohbhnvay3ag43qxjpivm3a
A Comparative Survey of Optical Wireless Technologies: Architectures and Applications
2018
IEEE Access
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2018 pre-print arXiv:1810.02594v1 fatcat:gd4qvu23yjd5nd24kzv5czncw4
This paper provides a technology overview and a review on optical wireless technologies, such as visible light communication, light fidelity, optical camera communication, free space optical communication ...
Optical wireless communication (OWC), which uses an ultra-wide range of unregulated spectrum, has emerged as a promising solution to overcome the RF spectrum crisis. ...
To overcome the limitations of PDs as receivers in LED/PD-based VLC systems, several works on IS-based optical signal reception have already been reported [90] - [107] . ...
doi:10.1109/access.2018.2792419
fatcat:wlvbsm5qzncjnjiaao3k55vysu
VLC: Beyond point-to-point communication
2014
IEEE Communications Magazine
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On the one hand, this approach raises the achievable system capacity. ...
Most recently, visible light communication (VLC) has been identified as well equipped to provide additional bandwidth and system capacity, without aggregating the interference in the mobile network. ...
Indeed, TDMA was utilised within the OMEGA project for the optical wireless medium access control (MAC) [12] , whereas optical-CDMA uses codes to separate users over the channel. ...
doi:10.1109/mcom.2014.6852089
fatcat:4un2v26aozer3n2mlkyxmqtudu
Design and Demonstration of a TDD-based Central-coordinated Resource-reserved Multiple Access (CRMA) Scheme for Bidirectional VLC Networking
2021
IEEE Access
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This paper proposes an all wireless optical bidirectional VLC multiple access scheme for pure VLC network access points in terminals. ...
Visible light communications (VLC) technology is a potential candidate for access networking in 5G, which offers a higher spectral efficiency than RF-based Femtocell networks by three orders of magnitude ...
A multicarrier CDMA system based on an OFDM platform using an intensity modulation/direct detection scheme suitable for an indoor VLC environment was designed in [16] . ...
doi:10.1109/access.2020.3049004
fatcat:njjbp62apzbxbdflo5zbtgc7tm
Effective PAPR reduction in SCFDM-based massive MIMO system using binary crow search algorithm for visible light communication towards 5G networks
2020
IET Communications
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Besides, binary crow search algorithm was used for sub-block partition optimisation in SLM for enhancing the convergence speed of the proposed SCFDM-based VLC system. ...
Presently, the single-carrier frequency division multiplexing (SCFDM)-based visible light communication (VLC) system is extensively implemented for secure and high-speed data transmission. ...
In the developed system, each LED broadcasts a distinctive identity code utilising CDMA modulation. Then, the coordinate of the receiver was determined on the basis of received signal strength. ...
doi:10.1049/iet-com.2020.0334
fatcat:gdoftquevnbx5f7uvcw5s3kxcu
Machine learning-based decentralized TDMA for VLC IoT networks
[article]
2023
arXiv
pre-print
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The proposed algorithm is implemented on a VLC hardware system, which had been designed and implemented in our laboratory. ...
The proposed algorithm is based on Q-learning, a reinforcement learning algorithm. ...
Several types of these algorithms have been proposed for VLC networks. Li et al. [18] proposed a code-division multiple access (CDMA)-based algorithm for VLC networks. ...
arXiv:2311.14078v2
fatcat:eavnfbno7fcnbeeeeyjizl3o2e
LANET: Visible-Light Ad Hoc Networks
2018
Ad hoc networks
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An optical wireless-based system relies on optical radiation to deliver information 20 in free space, with wavelengths included in the Infra-red (IR), visible-light, and ultraviolet (UV) 21 bands. ...
One of the main challenges is that VLC relies on optical radiations to deliver information 79 in free space through a substantial portion of unregulated spectrum between 400 and 800 THz, 80 with corresponding ...
There have been several 555 contributions aimed at employing CDMA in VLC. A system using Multi-carrier Code Division 556 Multiple Access (CDMA) (MC-CDMA) along with OFDM platform is proposed in [91]. ...
doi:10.1016/j.adhoc.2018.04.009
fatcat:aa6dg2ae2bg6pd2cok5tho42ze
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