Intelligent and Converged Networks 2021, 2(1): 50-65 https://doi.org/10.23919/ICN.2020.0024

Open Access | Issue | Published: 12 May 2021

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

Show Author's Information Hide Author's Information Jian Song, Tian Cao(

), Hongming Zhang(

)

Jian Song and Hongming Zhang are with Beijing National Research Center for Information Science and Technology (BNRist), Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

Key Laboratory of Digital TV System of Guangdong Province and Shenzhen City, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China

Beijing National Research Center for Information Science and Technology (BNRist), and Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

Keywords:

visible light communication, nonorthogonal multiple access, error propagation, on-off keying, multiple pulse position modulation, symbol error rate, achievable data rate

Cite this article:

Song J, Cao T, Zhang H. Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations. Intelligent and Converged Networks, 2021, 2(1): 50-65. https://doi.org/10.23919/ICN.2020.0024

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Abstract

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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About this article

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

Show Author's information Hide Author's Information Jian Song, Tian Cao(

), Hongming Zhang(

)

Key Laboratory of Digital TV System of Guangdong Province and Shenzhen City, Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China

Beijing National Research Center for Information Science and Technology (BNRist), and Department of Electronic Engineering, Tsinghua University, Beijing 100084, China

Abstract

Keywords: visible light communication, nonorthogonal multiple access, error propagation, on-off keying, multiple pulse position modulation, symbol error rate, achievable data rate

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Publication history

Received: 03 November 2020

Accepted: 08 December 2020

Published: 12 May 2021

Issue date: March 2021

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Acknowledgements

This work was supported by the National Key Research and Development Program of China (No. 2017YFB0403403) and the Natural Science Foundation of Guangdong Province (No. 2015A030312006).

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This work is available under the CC BY-NC-ND 3.0 IGO license: https://creativecommons.org/licenses/by-nc-nd/3.0/igo/.