Spectral-Efficient Reconstructed LACO-OFDM Transmission for Dimming Compatible Visible Light Communications
Dimming control is critical in practical visible light communication (VLC) systems to satisfy illumination demand. Upon exploiting multiple layers of asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) signals for simultaneous transmission, layered ACO-OFDM (LACO-OFD...
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IEEE
2019-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8611089/ |
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| author | Baolong Li Wei Xu Simeng Feng Zhengquan Li |
| author_facet | Baolong Li Wei Xu Simeng Feng Zhengquan Li |
| author_sort | Baolong Li |
| collection | DOAJ |
| description | Dimming control is critical in practical visible light communication (VLC) systems to satisfy illumination demand. Upon exploiting multiple layers of asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) signals for simultaneous transmission, layered ACO-OFDM (LACO-OFDM) constitutes a promising spectral-efficient modulation technique for VLC. However, dimming by integrating the industry-preferred pulsewidth modulation (PWM) to the LACO-OFDM scheme induces severe clipping noise due to the nonlinearity of LEDs. In this paper, we conceive a reconstructed LACO-OFDM (RLACO-OFDM) scheme incorporating the PWM technique for VLC to accommodate the dimming demands for indoor illumination, while maintaining a spectral-efficient communication link. Moreover, superior to its counterparts, the transmitted symbols in the RLACO-OFDM based VLC system can be readily recovered by a standard LACO-OFDM receiver while no additional detection of the PWM signal is required, which reduces the receiver complexity. Numerical results demonstrate that the proposed RLACO-OFDM is capable of realizing high spectral efficiency over a broad dimming range. |
| format | Article |
| id | doaj-art-3d1ff7c8796b455f9b54099ea944db51 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-3d1ff7c8796b455f9b54099ea944db512025-08-20T03:33:11ZengIEEEIEEE Photonics Journal1943-06552019-01-0111111410.1109/JPHOT.2019.28928498611089Spectral-Efficient Reconstructed LACO-OFDM Transmission for Dimming Compatible Visible Light CommunicationsBaolong Li0https://orcid.org/0000-0003-2791-8156Wei Xu1Simeng Feng2Zhengquan Li3https://orcid.org/0000-0002-3512-7103Jiangsu Provincial Engineerinig Laboratory of Pattern Recognition and Computational Intelligence, Jiangnan University, Wuxi, ChinaNational Mobile Communication Research Laboratory, Southeast University, Nanjing, ChinaNext Generation Wireless, School of Electronics and Computer Science, University of Southampton, UKJiangsu Provincial Engineerinig Laboratory of Pattern Recognition and Computational Intelligence, Jiangnan University, Wuxi, ChinaDimming control is critical in practical visible light communication (VLC) systems to satisfy illumination demand. Upon exploiting multiple layers of asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) signals for simultaneous transmission, layered ACO-OFDM (LACO-OFDM) constitutes a promising spectral-efficient modulation technique for VLC. However, dimming by integrating the industry-preferred pulsewidth modulation (PWM) to the LACO-OFDM scheme induces severe clipping noise due to the nonlinearity of LEDs. In this paper, we conceive a reconstructed LACO-OFDM (RLACO-OFDM) scheme incorporating the PWM technique for VLC to accommodate the dimming demands for indoor illumination, while maintaining a spectral-efficient communication link. Moreover, superior to its counterparts, the transmitted symbols in the RLACO-OFDM based VLC system can be readily recovered by a standard LACO-OFDM receiver while no additional detection of the PWM signal is required, which reduces the receiver complexity. Numerical results demonstrate that the proposed RLACO-OFDM is capable of realizing high spectral efficiency over a broad dimming range.https://ieeexplore.ieee.org/document/8611089/Visible light communication (VLC)dimming controlpulse width modulation (PWM)asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM)layered ACO-OFDM |
| spellingShingle | Baolong Li Wei Xu Simeng Feng Zhengquan Li Spectral-Efficient Reconstructed LACO-OFDM Transmission for Dimming Compatible Visible Light Communications IEEE Photonics Journal Visible light communication (VLC) dimming control pulse width modulation (PWM) asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) layered ACO-OFDM |
| title | Spectral-Efficient Reconstructed LACO-OFDM Transmission for Dimming Compatible Visible Light Communications |
| title_full | Spectral-Efficient Reconstructed LACO-OFDM Transmission for Dimming Compatible Visible Light Communications |
| title_fullStr | Spectral-Efficient Reconstructed LACO-OFDM Transmission for Dimming Compatible Visible Light Communications |
| title_full_unstemmed | Spectral-Efficient Reconstructed LACO-OFDM Transmission for Dimming Compatible Visible Light Communications |
| title_short | Spectral-Efficient Reconstructed LACO-OFDM Transmission for Dimming Compatible Visible Light Communications |
| title_sort | spectral efficient reconstructed laco ofdm transmission for dimming compatible visible light communications |
| topic | Visible light communication (VLC) dimming control pulse width modulation (PWM) asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) layered ACO-OFDM |
| url | https://ieeexplore.ieee.org/document/8611089/ |
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