BER Analysis of NOMA-Enabled Visible Light Communication Systems With Different Modulations

Liu, Xiaodong; Chen, Zezong; Wang, Yuhao; Zhou, Fuhui; Luo, Yimo; Hu, Rose Qingyang

doi:10.1109/tvt.2019.2938909

Cited by 77 publications

(26 citation statements)

References 46 publications

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“…Unless otherwise stated, U2 adopts .5; 2/ MPPM. Considering that different users' signals encounter different channel gains, the SER and ADR performances of different users are evaluated with the same transmitting SNR to provide a fair comparison [34,35] . The relationship between transmitting SNR and the average electrical SNR at the k-th user can be expressed as…”

Section: Resultsmentioning

confidence: 99%

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Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Song

Cao

Zhang

2021

Intell. and Converged Netw.

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Although Successive Interference Cancellation (SIC) decoding is widely adopted in Nonorthogonal Multiple Access (NOMA) schemes for the recovery of user data at acceptable complexity, the imperfect SIC would cause Error Propagation (EP), which can severely degrade system performance. In this work, we propose an SIC-free NOMA scheme in pulse modulation based Visible Light Communication (VLC) downlinks, including two types of users with different data rate requirements. Low bit-rate users adopt on-off keying, whereas high bit-rate ones use Multiple Pulse Position Modulation (MPPM). The soft decision decoding scheme is exploited by high bit-rate users to decode MPPM signals, which could fundamentally eliminate the detrimental effect of EP; the scheme is also easier and faster to execute compared with the conventional SIC decoding scheme. Expressions of the symbol error rate and achievable data rate for two types of users are derived. Results of the Monte Carlo simulation are provided to confirm the correctness of theoretical results.

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Section: Resultsmentioning

confidence: 99%

“…In Ref. [35], Liu et al derived closed-form BER expressions for M-ary phase shift keying, M-ary pulse amplitude modulation, and M-ary quadrature amplitude modulation in NOMA-VLC systems with two users. To mitigate the effect of EP on the error performance of NOMA-VLC systems, some approaches have been proposed in recent works.…”

Section: Related Workmentioning

confidence: 99%

Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Song

Cao

Zhang

2021

Intell. and Converged Netw.

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“…Another interesting study was reported in [39], where authors studied optimal power allocation for NOMA-VLC for both static users and mobile users under CSI uncertainties. In [40], the authors studied the bit error rate performance of NOMA-VLC under different modulation schemes. The study in [41] compared NOMA and OMA schemes in the VLC environment, where the users report positional information (vertical and horizontal) instead of reporting the full channel-state-information, which can significantly simplify the implementation.…”

Section: List Of Symbols αmentioning

confidence: 99%

Non-Orthogonal Multiple Access for Hybrid VLC-RF Networks With Imperfect Channel State Information

Hammadi

Sofotasios

Muhaidat

et al. 2021

IEEE Trans. Veh. Technol.

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This paper proposes a general framework for the energy efficiency analysis of a hybrid visible light communication (VLC) and Radio Frequency (RF) wireless system, in which both VLC and RF subsystems utilize non-orthogonal multiple access (NOMA) technology. The proposed framework is based on realistic communication scenarios as it takes into account the mobility of users and assumes imperfect channel-state information (CSI). In this context, tractable closed-form expressions are derived for the corresponding average sum-rate of NOMA-VLC and orthogonal frequency division multiple access (OFDMA)-VLC. It is shown extensively that incurred CSI errors have a considerable impact on the average energy efficiency of both NOMA-VLC and OFDMA-VLC systems. Hence, they should be taken into detailed account in the design of practical systems. We further demonstrate that the average energy efficiency of the hybrid NOMA-VLC-RF system outperforms the NOMA-VLC system under imperfect CSI. Respective computer simulations corroborate the derived analytic results, and interesting theoretical and practical insights are provided, which will be useful in the effective design and deployment of conventional VLC and hybrid VLC-RF systems.

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“…In [41], the symbol error rate (SER) of C-NOMA-based VLC system was investigated, where users exhibited identical error rate performance at different locations. On the other hand, recently published papers showed that P-NOMA is a rather efficient MA scheme in VLC systems, due to the aforementioned reasons [53], [56], [57]. Furthermore, reported results showed that NOMA 2 outperforms OMA techniques, such as OFDMA and TDMA, in terms of system capacity and number of simultaneously served users, particularly in single-input single-output broadcast channels and for certain channel strength disparities among users [58]- [61].…”

Section: Noma In Vlcmentioning

confidence: 99%

Rate-Splitting Multiple Access: Unifying NOMA and SDMA in MISO VLC Channels

Naser

Sofotasios

Bariah

et al. 2020

IEEE Open J. Veh. Technol.

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The increased proliferation of connected devices requires a development of innovative technologies for the next generation of wireless systems. One of the key challenges, however, is the spectrum scarcity, owing to the unprecedented broadband penetration rate in recent years. Based on this, visible light communication (VLC) has recently emerged as an effective potential solution for enabling high-speed short-range communications. Yet, despite their undoubted advantageous features, VLC systems suffer from several limitations which constraint their capabilities. As a result, several multiple access (MA) techniques, such as space-division multiple access (SDMA) and non-orthogonal multiple access (NOMA), have been considered in VLC networks as an effective approach, among others, to circumvent these limitations. However, despite their achievable multiplexing gain, their overall performance is still limited compared to the overall potential of this technology. Motivated by this, the presented article offers two contributions: firstly, we provide an overview of the key MA technologies used in VLC systems and then we introduce rate-splitting multiple access (RSMA), and discuss its capabilities and potentials in VLC systems. Secondly, through realistic system modeling and simulations of an RSMA-based two-user scenario, we illustrate the flexibility of RSMA as well as its superiority in terms of the achievable weighted sum rate over NOMA and SDMA in the context of VLC. Finally, we discuss technical challenges, open issues, and research directions, along with the offered results and insights that are expected to be useful towards the effective practical realization of RSMA in VLC configurations.

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BER Analysis of NOMA-Enabled Visible Light Communication Systems With Different Modulations

Cited by 77 publications

References 46 publications

Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Non-Orthogonal Multiple Access for Hybrid VLC-RF Networks With Imperfect Channel State Information

Rate-Splitting Multiple Access: Unifying NOMA and SDMA in MISO VLC Channels

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