Spatial and wavelength division multiplexing for high-speed VLC systems: An overview

Rajbhandari, Sujan

doi:10.1109/csndsp.2016.7574005

Cited by 5 publications

(4 citation statements)

References 56 publications

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“…Due to this effect, LoS component will be increased. A detailed analysis of this particular configuration is available in [3]. Also, the multiple LEDs can be configured at the different corners of the roof.…”

Section: Simulation and Resultsmentioning

confidence: 99%

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A Novel Non-DC Biased Intensity Modulated Indoor MIMO-VLC System Using Walsh Precoder

Muneer

Ijyas

Abbas

et al. 2020

Wireless Communications and Mobile Computing

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In this paper, we propose an indoor visible light communication (VLC) system which makes use of Walsh precoding and multiple light-emitting diodes (LEDs) at the transmitter for multiplexing the data. The proposed VLC system is based on intensity modulation and uses the notion of spatial modulation for communicating the positive and negative values of the synthesized transmit signal using signal processing technique at the transmitter. We also illustrate the flexibility, ability, and easiness of the system to configure well in a multiuser environment. We have also developed a near-maximum likelihood (ML) detection technique for efficiently decoding the data bits at the receiver. The proposed near-ML reduces the search space involved in ML technique by using the initial ZF solution. The results of the simulation studies illustrate that the proposed technique offers a higher data rate and good bit error rate (BER) performance in indoor VLC environments.

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Section: Simulation and Resultsmentioning

confidence: 99%

“…Successive interference cancellation (SIC) is used for the multiuser detection. Spatial multiplexing can be combined with WDM to achieve very high data rates [3]. Optical spatial modulation (OSM) or space shift keying (SSK) is such a technique [4].…”

Section: Introductionmentioning

confidence: 99%

A Novel Non-DC Biased Intensity Modulated Indoor MIMO-VLC System Using Walsh Precoder

Muneer

Ijyas

Abbas

et al. 2020

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

show abstract

“…However, the number of receivers should be equal to or larger than the number of transmitters i.e. K ≥ N [2], [16]. This condition is required to ensure the channel matrix is full rank.…”

Section: Mimo Vlc Modellingmentioning

confidence: 99%

Dynamic Physical-Layer Secured Link in a Mobile MIMO VLC System

et al. 2020

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This paper proposes a novel approach to provide a privately secured multipleinput and multiple-output visible light communication (VLC) in the mobility conditions. In the proposed system, a private secured VLC link is adaptively allocated to a mobile user all the time thanks to the movement tracking assistance by a camera-based detection system. The generation of the dynamic location-based scrambling matrix will be introduced providing a secured communication zone within a full normal coverage illumination area. An extensive range of numerical evaluation and practical experiments is carried out to demonstrate and evaluate the proposed system performance in different environment configurations including the mobility, camera resolutions, link range, and environment light intensity. We demonstrate that the proposed system is fully capable of securely steering the information with respect to a receiver location with a high level of reliability.

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“…To achieve higher transmission speeds in bandlimited VLC systems, a number of techniques have been reported [7][8][9]. Spectrally efficient modulation formats such as orthogonal frequency division multiplexing (OFDM), pulse amplitude modulation (PAM) or carrier-less amplitude and phase (CAP) modulation are popular options for increasing data rates.…”

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confidence: 99%

Multi-band carrier-less amplitude and phase modulation for VLC: An overview

Chvojka

Werfli

Haigh

et al. 2017

2017 First South American Colloquium on Visible Light Communications (SACVLC)

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The rapid development of solid-state lighting technologies has been the stimulus for visible light communications (VLC) to be the focus of enormous interest over the last decade. The key feature of simultaneous data transmission and illumination using white light-emitting diodes (LEDs) makes VLC a potential candidate for future power efficient communication networks that aim to meet the ever-increasing demands for high-speed internet services. Researchers, motivated by the success of VLC technology, have developed a number of techniques and methods to support communication systems with both high transmission speeds and spectral efficiency. Here, we provide an overview of the multi-band carrier-less amplitude and phase (m-CAP) modulation technique enabling highly spectrally efficient VLC links in bandlimited environments. Index Terms-multi-band carrier-less amplitude and phase modulation, spectral efficiency, visible light communications I. INTRODUCTION HE existing radio frequency (RF) based wireless communication technologies cannot cope with the increasing demands for high-speed data traffic, which is expected to grow sevenfold between 2016 and 2017 [1]. The commercially available RF spectrum has already been exhausted, thus leading to the spectrum crunch that needs urgent attention. There are a number of possible options to address this problem including allocation of new spectra, which is highly expensive, spectrum hoping, sharing and borrowing, advanced modulation and coding schemes, interference elimination, and parallel transmission. Alternatively, the carrier frequency could be shifted to the optical domain i.e., optical wireless communications (OWC), which covers the three main bands of visible, infrared and ultraviolet, thus offering an alternative solution for future broadband services in indoor and outdoor environments [2]. The infrared and ultraviolet bands are mostly used in outdoor applications for line-of-sight (LOS) and non-LOS links, whereas the visible band has been widely adopted in the indoor environment [3]. As a part of OWC, visible light communications (VLC) has been the focus of enormous attention due to a few key advantages including (i) high and unregulated bandwidth (in the order of THz);

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Spatial and wavelength division multiplexing for high-speed VLC systems: An overview

Cited by 5 publications

References 56 publications

A Novel Non-DC Biased Intensity Modulated Indoor MIMO-VLC System Using Walsh Precoder

A Novel Non-DC Biased Intensity Modulated Indoor MIMO-VLC System Using Walsh Precoder

Dynamic Physical-Layer Secured Link in a Mobile MIMO VLC System

Multi-band carrier-less amplitude and phase modulation for VLC: An overview

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