Flexible-rate SIC-free NOMA for downlink VLC based on constellation partitioning coding
Visible light communication (VLC) systems utilizing conventional superposition coding/successive interference cancellation (SPC/SIC)-based non-orthogonal multiple access (NOMA) suffer from the error propagation effect due to imperfect SIC. In this letter, we propose a flexible-rate SIC-free NOMA tec...
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sg-ntu-dr.10356-1055902019-12-06T21:54:10Z Flexible-rate SIC-free NOMA for downlink VLC based on constellation partitioning coding Chen, Chen Zhong, Wen-De Yang, Helin Du, Pengfei Yang, Yanbing School of Electrical and Electronic Engineering Constellation Partitioning Coding Visible Light Communication Engineering::Electrical and electronic engineering Visible light communication (VLC) systems utilizing conventional superposition coding/successive interference cancellation (SPC/SIC)-based non-orthogonal multiple access (NOMA) suffer from the error propagation effect due to imperfect SIC. In this letter, we propose a flexible-rate SIC-free NOMA technique for downlink VLC systems, based on constellation partitioning coding (CPC) and uneven constellation demapping (UCD). By using CPC/UCD, SIC is not required and hence error propagation can be eliminated in NOMA-based VLC systems. Moreover, by selecting a proper bit allocation scheme, flexible-rate multiple access can be supported in the VLC system applying CPC/UCD based NOMA. Proof-of-concept two-user VLC experiments verify that, compared with conventional SPC/SIC-based NOMA, the bit error rate performance of the near user can be greatly improved by using CPC/UCD-based NOMA, and hence the effective power allocation ratio range can be substantially extended. NRF (Natl Research Foundation, S’pore) Accepted version 2019-10-15T06:05:03Z 2019-12-06T21:54:09Z 2019-10-15T06:05:03Z 2019-12-06T21:54:09Z 2019 Journal Article Chen, C., Zhong, W.-D., Yang, H., Du, P., & Yang, Y. (2019). Flexible-rate SIC-free NOMA for downlink VLC based on constellation partitioning coding. IEEE Wireless Communications Letters, 8(2), 568-571. doi:10.1109/LWC.2018.2879924 2162-2337 https://hdl.handle.net/10356/105590 http://hdl.handle.net/10220/50156 http://dx.doi.org/10.1109/LWC.2018.2879924 en IEEE Wireless Communications Letters © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: https://doi.org/10.1109/LWC.2018.2879924 4 p. application/pdf |
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Constellation Partitioning Coding Visible Light Communication Engineering::Electrical and electronic engineering Chen, Chen Zhong, Wen-De Yang, Helin Du, Pengfei Yang, Yanbing Flexible-rate SIC-free NOMA for downlink VLC based on constellation partitioning coding |
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Visible light communication (VLC) systems utilizing conventional superposition coding/successive interference cancellation (SPC/SIC)-based non-orthogonal multiple access (NOMA) suffer from the error propagation effect due to imperfect SIC. In this letter, we propose a flexible-rate SIC-free NOMA technique for downlink VLC systems, based on constellation partitioning coding (CPC) and uneven constellation demapping (UCD). By using CPC/UCD, SIC is not required and hence error propagation can be eliminated in NOMA-based VLC systems. Moreover, by selecting a proper bit allocation scheme, flexible-rate multiple access can be supported in the VLC system applying CPC/UCD based NOMA. Proof-of-concept two-user VLC experiments verify that, compared with conventional SPC/SIC-based NOMA, the bit error rate performance of the near user can be greatly improved by using CPC/UCD-based NOMA, and hence the effective power allocation ratio range can be substantially extended. |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Chen, Chen Zhong, Wen-De Yang, Helin Du, Pengfei Yang, Yanbing |
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Article |
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Chen, Chen Zhong, Wen-De Yang, Helin Du, Pengfei Yang, Yanbing |
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Chen, Chen |
title |
Flexible-rate SIC-free NOMA for downlink VLC based on constellation partitioning coding |
title_short |
Flexible-rate SIC-free NOMA for downlink VLC based on constellation partitioning coding |
title_full |
Flexible-rate SIC-free NOMA for downlink VLC based on constellation partitioning coding |
title_fullStr |
Flexible-rate SIC-free NOMA for downlink VLC based on constellation partitioning coding |
title_full_unstemmed |
Flexible-rate SIC-free NOMA for downlink VLC based on constellation partitioning coding |
title_sort |
flexible-rate sic-free noma for downlink vlc based on constellation partitioning coding |
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2019 |
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https://hdl.handle.net/10356/105590 http://hdl.handle.net/10220/50156 http://dx.doi.org/10.1109/LWC.2018.2879924 |
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