Non-Orthogonal Multiple Access for Mobile VLC Networks with Random Receiver Orientation

Yapıcı, Yavuz; Güvenç, İsmail

doi:10.1109/globecom38437.2019.9013586

Cited by 12 publications

(18 citation statements)

References 25 publications

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“…Tsiropoulou et al [88] have investigated problematics of non-orthogonal multiple acces (NOMA) vs. orthogonal frequency division multiple access (OFDMA) approach [89][90][91]. According to her, NOMA offers us multiple advantages, such as considerable interference mitigation or simultaneous bandwidth utilization.…”

Section: Light-to-medical Devicesmentioning

confidence: 99%

Visible Light Communication System Based on Software Defined Radio: Performance Study of Intelligent Transportation and Indoor Applications

2019

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In this paper, our first attempt at visible light communication system, based on software defined radio (SDR) and implemented in LabVIEW is introduced. This paper mainly focuses on two most commonly used types of LED lights, ceiling lights and LED car lamps/tail-lights. The primary focus of this study is to determine the basic parameters of real implementation of visible light communication (VLC) system, such as transmit speed, communication errors (bit-error ratio, error vector magnitude, energy per bit to noise power spectral density ratio) and highest reachable distance. This work focuses on testing various multistate quadrature amplitude modulation (M-QAM). We have used Skoda Octavia III tail-light and Phillips indoor ceiling light as transmitters and SI PIN Thorlabs photodetector as receiver. Testing method for each light was different. When testing ceiling light, we have focused on reachable distance for each M-QAM variant. On the other side, Octavia tail-light was tested in variable nature conditions (such as thermal turbulence, rain, fog) simulated in special testing box. This work will present our solution, measured parameters and possible weak spots, which will be adjusted in the future.

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Section: Light-to-medical Devicesmentioning

confidence: 99%

Visible Light Communication System Based on Software Defined Radio: Performance Study of Intelligent Transportation and Indoor Applications

2019

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“…In research by Oviedo and Cao et al [16,17], when the transmit signal to interference plus noise ratio is not low, the expected NOMA capacity increase following GRPA is greater than the OMA capacity with the same resource allocation conditions, which can be regarded as the guaranteed-QoS data rate. In research by Yapici et al [18], comprehensive numerical results verified the superiority of NOMA-VLC in achieving a satisfactory QoS target rate by random receiver orientation. Vertical angle information can compensate for loss in user rates by incorporating suitable power allocation coefficients, which are inversely proportional to the channel quality of the respective NOMA user.…”

Section: Introductionmentioning

confidence: 89%

Power Allocation of Non-Orthogonal Multiple Access Based on Dynamic User Priority for Indoor QoS-Guaranteed Visible Light Communication Networks

Tao

et al. 2018

Applied Sciences

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Non-orthogonal multiple access (NOMA) simultaneously provides multi-user access over the same frequency band or time period, which can significantly improve system throughput in visible light communication (VLC) networks. However, the different interference components of NOMA and the diversified user requirements in VLC are difficult to coordinate. To guarantee both throughput enhancement and quality of service (QoS) satisfaction, this paper presents a power allocation scheme based on dynamic user priority in indoor NOMA-VLC networks. We introduce fuzzy logic (FL) to flexibly analyse user priority and assign signal power using multi-dimensional user features. The experimental results show that our method achieves the best performance in terms of user fairness and satisfaction. In indoor VLC, which has small cells with a high user density, our method outperforms contrastive schemes in terms of the average user data rate (AUDR). Therefore, in comparisons between static and dynamic user priority, our study indicates the fairness advantages of FL for the dynamic evaluation of user priority. In comparisons between NOMA and orthogonal multiple access, our study reflects the AUDR advantages of non-orthogonal methods. Furthermore, in comparisons of user satisfaction, our method outperforms existing methods, indicating the achievement of the QoS guarantee.

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“…By considering the proportional fairness [96], authors of [152] showed that the formulated problem was of non-convex type, but could be converted to a convex problem that could be solved using a dual decomposition method. Authors of [153] evaluated and compared the NOMA and OMA schemes, when the users change their locations and their vertical orientation. Instead of reporting the full CSI that increases the computational complexity, they used limited-feedback schemes to categorize users based on their mean vertical angle and mean distance, and this might be most appropriate to simplify the implementation.…”

Section: Noma In Vlcmentioning

confidence: 99%

On Optimizing VLC Networks for Downlink Multi-User Transmission: A Survey

Obeed

Salhab

Alouini

et al. 2019

IEEE Commun. Surv. Tutorials

184

101

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The evolving explosion in high data rate services and applications will soon require the use of untapped, abundant unregulated spectrum of the visible light for communications to adequately meet the demands of the fifth-generation (5G) mobile technologies. Radio-frequency (RF) networks are proving to be scarce to cover the escalation in data rate services. Visible light communication (VLC) has emerged as a great potential solution, either in replacement of, or complement to, existing RF networks, to support the projected traffic demands. Despite of the prolific advantages of VLC networks, VLC faces many challenges that must be resolved in the near future to achieve a full standardization and to be integrated to future wireless systems.Here, we review the new, emerging research in the field of VLC networks and lay out the challenges, technological solutions, and future work predictions. Specifically, we first review the VLC channel capacity derivation, discuss the performance metrics and the associated variables; the optimization of VLC networks are also discussed, including resources and power allocation techniques, user-to-access point (AP) association and APs-toclustered-users-association, APs coordination techniques, nonorthogonal multiple access (NOMA) VLC networks, simultaneous energy harvesting and information transmission using the visible light, and the security issue in VLC networks. Finally, we propose several open research problems to optimize the various VLC networks by maximizing either the sum rate, fairness, energy efficiency, secrecy rate, or harvested energy.

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Non-Orthogonal Multiple Access for Mobile VLC Networks with Random Receiver Orientation

Cited by 12 publications

References 25 publications

Visible Light Communication System Based on Software Defined Radio: Performance Study of Intelligent Transportation and Indoor Applications

Visible Light Communication System Based on Software Defined Radio: Performance Study of Intelligent Transportation and Indoor Applications

Power Allocation of Non-Orthogonal Multiple Access Based on Dynamic User Priority for Indoor QoS-Guaranteed Visible Light Communication Networks

On Optimizing VLC Networks for Downlink Multi-User Transmission: A Survey

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