Non-orthogonal multiple access with phase pre-distortion in visible light communication

Guan, Xun; Yang, Qing; Hong, Yang; Chan, Calvin

doi:10.1364/oe.24.025816

Cited by 55 publications

(27 citation statements)

References 12 publications

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“…In [5,6] the power allocation schemes were investigated for PD-NOMA-VLC in order to optimize the sum user rate. The experimental demonstrations of PD-NOMA-VLC were reported in [7,8], whereas applications of PD-NOMA in MIMO-VLC were investigated [9,10].…”

Section: Introductionmentioning

confidence: 99%

Optical Power Domain NOMA for Visible Light Communications

Lin

Tang

Ghassemlooy

2019

IEEE Wireless Commun. Lett.

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We propose an optical power domain non-orthogonal multiple access (OPD-NOMA) scheme for visible light communications. OPD-NOMA superposes user messages in the optical power domain based on a light-emitting diode (LED) array. The maximum driven current for respective circuits is reduced compared to that of conventional NOMA, in which the LED-array-module is driven by a single circuit. OPD-NOMA reduces the gain and bandwidth requirements for the driver circuit of light source. The nonlinear power-current response of LED largely restricts its usable dynamic range and thus the transmit power. In OPD-NOMA, signals with lower powers suffer from reduced nonlinear distortion. The experimental results show that, OPD-NOMA offers improved transmission performance compared to conventional NOMA using the same driver circuit, since it can make a better use of the linear dynamic range of the LED's power-current response. Index Terms-Visible light communications (VLC), successive interference cancellation (SIC), non-orthogonal multiple access (NOMA)

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Section: Introductionmentioning

confidence: 99%

Optical Power Domain NOMA for Visible Light Communications

Lin

Tang

Ghassemlooy

2019

IEEE Wireless Commun. Lett.

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“…Differently from a traditional OMA system, NOMA allow users to share all time-frequency (TF) resources and has proven to be superior theoretically and experimentally [8]. Apart from its applications in RF communications, NOMA has been introduced to VLC systems [9] and abundant research achievements have been obtained [10][11][12][13], especially those concerning power allocation schemes. In the literature by L. Yin et al [14], the performance of NOMA-VLC was investigated based on a fixed power allocation (FPA) scheme.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Power Allocation Scheme for Mobile NOMA Visible Light Communication System

Dong

Shang

et al. 2019

Electronics

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Recently, due to its higher spectral efficiency and enhanced user experience, non-orthogonal multiple access (NOMA) has been widely studied in visible light communication (VLC) systems. As a main concern in NOMA-VLC systems, the power allocation scheme greatly affects the tradeoff between the total achievable data rate and user fairness. In this context, our main aim in this work was to find a more balanced power allocation scheme. To this end, an adaptive power allocation scheme based on multi-attribute decision making (MADM), which flexibly chooses between conventional power allocation or inverse power allocation (IPA) and the optimal power allocation factor, has been proposed. The concept of IPA is put forward for the first time and proves to be beneficial to achieving a higher total achievable data rate at the cost of user fairness. Moreover, considering users’ mobility along certain trajectories, we derived a fitting model of the optimal power allocation factor. The feasibility of the proposed adaptive scheme was verified through simulation and the fitting model was approximated to be the sum of three Gaussian functions.

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“…As a result, NOMA can balance throughput and fairness. It has been regarded as a promising solution to enhance the spectral efficiency for the 5th generation (5G) wireless networks [8][9][10].With good feasibility and performance, it has also been adopted for VLC systems [11][12][13].In [14], a phase pre-distortion method was proposed to improve the symbol error rate performance of NOMA uplink with SIC decoding in VLC. In [15], we propose a NOMA scheme combined with OFDMA for VLC, which offers flexible bandwidth allocation and a higher system capacity.…”

Section: Introductionmentioning

confidence: 99%

A NOMA scheme for visible light communications with single carrier transmission and frequency-domain successive interference cancellation

Lin

Tang

Ghassemlooy

et al. 2019

Optik

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We propose a non-orthogonal multiple access (NOMA) scheme for visible light communications (VLC) based on single carrier (SC) transmission and frequency-domain successive interference cancellation. The scheme can achieve low peak-to-average power ratio (PAPR), a good balance between throughput and fairness, and a higher system capacity for a larger number of users. We show by experiment that SC with a lower PAPR offers improved bit error rate (BER) performance compared with the orthogonal frequency division multiplexing. Key wordsvisible light communications (VLC), non-orthogonal multiple access (NOMA), single carrier transmission.

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Non-orthogonal multiple access with phase pre-distortion in visible light communication

Cited by 55 publications

References 12 publications

Optical Power Domain NOMA for Visible Light Communications

Optical Power Domain NOMA for Visible Light Communications

Adaptive Power Allocation Scheme for Mobile NOMA Visible Light Communication System

A NOMA scheme for visible light communications with single carrier transmission and frequency-domain successive interference cancellation

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