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Performance analysis in multiuser downlink visible light communication MIMO system using SSK and optical orthogonal codes.

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Title: Performance analysis in multiuser downlink visible light communication MIMO system using SSK and optical orthogonal codes.
Authors: Wu, Wei‐Chiang1 (AUTHOR) lclunds@163.com, Chen, Gan‐Lin2,3 (AUTHOR)
Source: International Journal of Communication Systems. Dec2024, Vol. 37 Issue 18, p1-15. 15p.
Subjects: Orthogonal codes, Symbol error rate, Monte Carlo method, Optical communications, Visible spectra
Abstract: Summary: This paper considers multiuser downlink transmission and detection in a multiple input‐multiple output (MIMO) visible light communication (VLC) system. We combine two promising techniques: space‐shift keying (SSK) and optical orthogonal codes (OOCs). Multiuser downlink transmission is realized by allowing each activated LED to transmit user‐specific OOC simultaneously. An OOC despreader is implemented at the front end of each user terminal (UT) to extract the desired signal and mitigate multiuser interference (MUI). The second part of UT receiver aims to extract the index of the corresponding active LED based on maximum likelihood (ML) or zero‐forcing (ZF) algorithm. The figure of merit we used to access the performance of the proposed downlink multiuser SSK system is the average symbol error rate (SER). Comprehensive Monte Carlo simulations have been undertaken for different system setup to evaluate SER at UT receiver. It is demonstrated that for a specified SER, the required SNR for ML‐based detection algorithm is 3 dB less than the ZF detector in the MUI‐free scenario. On the other hand, the ZF detector outperforms ML detector in the case with residual MUI and limited channel state information (CSI). Both algorithms are computationally attractive, hence can be put into practice in multiuser VLC MIMO system. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Communication Systems is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Performance analysis in multiuser downlink visible light communication MIMO system using SSK and optical orthogonal codes.
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  Data: <searchLink fieldCode="AR" term="%22Wu%2C+Wei‐Chiang%22">Wu, Wei‐Chiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lclunds@163.com</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Gan‐Lin%22">Chen, Gan‐Lin</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Communication+Systems%22">International Journal of Communication Systems</searchLink>. Dec2024, Vol. 37 Issue 18, p1-15. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Orthogonal+codes%22">Orthogonal codes</searchLink><br /><searchLink fieldCode="DE" term="%22Symbol+error+rate%22">Symbol error rate</searchLink><br /><searchLink fieldCode="DE" term="%22Monte+Carlo+method%22">Monte Carlo method</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+communications%22">Optical communications</searchLink><br /><searchLink fieldCode="DE" term="%22Visible+spectra%22">Visible spectra</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Summary: This paper considers multiuser downlink transmission and detection in a multiple input‐multiple output (MIMO) visible light communication (VLC) system. We combine two promising techniques: space‐shift keying (SSK) and optical orthogonal codes (OOCs). Multiuser downlink transmission is realized by allowing each activated LED to transmit user‐specific OOC simultaneously. An OOC despreader is implemented at the front end of each user terminal (UT) to extract the desired signal and mitigate multiuser interference (MUI). The second part of UT receiver aims to extract the index of the corresponding active LED based on maximum likelihood (ML) or zero‐forcing (ZF) algorithm. The figure of merit we used to access the performance of the proposed downlink multiuser SSK system is the average symbol error rate (SER). Comprehensive Monte Carlo simulations have been undertaken for different system setup to evaluate SER at UT receiver. It is demonstrated that for a specified SER, the required SNR for ML‐based detection algorithm is 3 dB less than the ZF detector in the MUI‐free scenario. On the other hand, the ZF detector outperforms ML detector in the case with residual MUI and limited channel state information (CSI). Both algorithms are computationally attractive, hence can be put into practice in multiuser VLC MIMO system. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Communication Systems is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1002/dac.5949
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 1
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      – SubjectFull: Orthogonal codes
        Type: general
      – SubjectFull: Symbol error rate
        Type: general
      – SubjectFull: Monte Carlo method
        Type: general
      – SubjectFull: Optical communications
        Type: general
      – SubjectFull: Visible spectra
        Type: general
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      – TitleFull: Performance analysis in multiuser downlink visible light communication MIMO system using SSK and optical orthogonal codes.
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            NameFull: Wu, Wei‐Chiang
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            – D: 15
              M: 12
              Text: Dec2024
              Type: published
              Y: 2024
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              Value: 37
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            – TitleFull: International Journal of Communication Systems
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