Experimental demonstration of SCMA for visible light communications

Lin, Bangjiang; Wei, Chuanjia; Xu, Junxiang; Lai, Qiwei; Tang, Xuan; Shen, Xiaohuan

doi:10.1016/j.optcom.2018.03.015

Cited by 13 publications

(6 citation statements)

References 14 publications

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“…The VLC systems have the requirement of real and positive signal transmission. In [143]- [145], radio-frequency (RF) based multi-dimensional CBs have been used and made suitable changes so that they can be applied to the VLC system. The SCMA CBs have been designed specifically for VLC systems in [146]- [149].…”

Section: New Applications and Future Directionsmentioning

confidence: 99%

A Tutorial on Decoding Techniques of Sparse Code Multiple Access

et al. 2022

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Sparse Code Multiple Access (SCMA) is a disruptive code-domain non-orthogonal multiple access (NOMA) scheme to enable future massive machine-type communication networks. As an evolved variant of code division multiple access (CDMA), multiple users in SCMA are separated by assigning distinctive sparse codebooks (CBs). Efficient multiuser detection is carried out at the receiver by employing the message passing algorithm (MPA) that exploits the sparsity of CBs to achieve error performance approaching to that of the maximum likelihood receiver. In spite of numerous research efforts in recent years, a comprehensive one-stop tutorial of SCMA covering the background, the basic principles, and new advances, is still missing, to the best of our knowledge. To fill this gap and to stimulate more forthcoming research, we provide a holistic introduction to the principles of SCMA encoding, CB design, and MPA based decoding in a self-contained manner. As an ambitious paper aiming to push the limits of SCMA, we present a survey of advanced decoding techniques with brief algorithmic descriptions as well as several promising directions.

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Section: New Applications and Future Directionsmentioning

confidence: 99%

A Tutorial on Decoding Techniques of Sparse Code Multiple Access

et al. 2022

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“…As seen in Fig. 6, most of the research has focused on power-domain NOMA in VLC systems and only one reference [146] has investigated SCMA scheme in code-domain NOMA. Hence, further detailed investigations on adopting other code-domain NOMA solutions and the solutions of NOMA multiplexing in multiple domains (see Fig.…”

Section: B Further Issues On Noma Vlcmentioning

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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“…Several research works incorporating SCMA in VLC (SCMA-VLC) systems have been presented in the literature. In [11], [12], experimental demonstration of SCMA-VLC system with overloading factor of 1.5 was reported 2 . In [13], a hybrid power-domain SCMA was investigated for VLC, showing improved data rate at the cost of reduced transmission distance.…”

Section: Introductionmentioning

confidence: 99%

Low-Complexity Codebook Design for SCMA-Based Visible Light Communication

Chaturvedi

Anwar

Srivastava

et al. 2022

IEEE Open J. Commun. Soc.

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Sparse code multiple access (SCMA), as a code-domain non-orthogonal multiple access (NOMA) scheme, has received considerable research attention for enabling massive connectivity in future wireless communication systems. In this paper, we present a novel codebook (CB) design for SCMA based visible light communication (VLC) system, which suffers from shot noise. In particular, we introduce an iterative algorithm for designing and optimizing CB by considering the impact of shot noise at the VLC receiver. Based on the proposed CB, we derive and analyze the theoretical bit error rate (BER) expression for the resultant SCMA-VLC system. The simulation results show that our proposed CBs outperform CBs in the existing literature for different loading factors with much less complexity. Further, the derived analytical BER expression well aligns with simulated results, especially in high signal power regions.

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Experimental demonstration of SCMA for visible light communications

Cited by 13 publications

References 14 publications

A Tutorial on Decoding Techniques of Sparse Code Multiple Access

A Tutorial on Decoding Techniques of Sparse Code Multiple Access

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

Low-Complexity Codebook Design for SCMA-Based Visible Light Communication

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