Subcarrier and Power Allocations for Dimmable Enhanced ADO-OFDM With Iterative Interference Cancellation
In this paper, a novel modulation scheme called enhanced asymmetrically clipped DC-biased optical OFDM (eADO-OFDM) is proposed to accommodate different demands of multi-users in downlink multiple access for visible light communication systems. Meanwhile, to satisfy various dimming levels, enhanced n...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8653898/ |
| _version_ | 1818875908292870144 |
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| author | Xuan Huang Fang Yang Xuan Liu Hailong Zhang Jun Ye Jian Song |
| author_facet | Xuan Huang Fang Yang Xuan Liu Hailong Zhang Jun Ye Jian Song |
| author_sort | Xuan Huang |
| collection | DOAJ |
| description | In this paper, a novel modulation scheme called enhanced asymmetrically clipped DC-biased optical OFDM (eADO-OFDM) is proposed to accommodate different demands of multi-users in downlink multiple access for visible light communication systems. Meanwhile, to satisfy various dimming levels, enhanced negative ADO-OFDM (eNADO-OFDM) is investigated and combined with eADO-OFDM for multiplexing transmission. By adjusting the proportion of these two signals, the dimming control scheme can be achieved, while the entire dynamic range of light-emitting diodes is exploited. In order to achieve superior transmission performance, the optimal power allocation under the desired dimming level is studied to minimize the overall bit error rate (BER). Moreover, to obtain more accurate estimation, an iterative receiver with interference cancellation, in which the pairwise averaging and pairwise clipping are exploited, is proposed. The simulation results show that the proposed scheme can effectively carry out the dimming control with wide dimming range for illumination and achieve superior BER performance at the same signal-to-noise ratio compared to the conventional counterparts, while only a few iterations are required. |
| first_indexed | 2024-12-19T13:33:58Z |
| format | Article |
| id | doaj.art-33ee241afcc446b191576126ab40b6dd |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-19T13:33:58Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-33ee241afcc446b191576126ab40b6dd2022-12-21T20:19:16ZengIEEEIEEE Access2169-35362019-01-017284222843510.1109/ACCESS.2019.29019398653898Subcarrier and Power Allocations for Dimmable Enhanced ADO-OFDM With Iterative Interference CancellationXuan Huang0Fang Yang1https://orcid.org/0000-0003-3575-5086Xuan Liu2Hailong Zhang3Jun Ye4Jian Song5Department of Electronic Engineering, Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, ChinaDepartment of Electronic Engineering, Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, ChinaChina Electric Power Research Institute, Beijing, ChinaChina Electric Power Research Institute, Beijing, ChinaState Grid Chongqing Electric Power Company Electric Power Research Institute, Chongqing, ChinaDepartment of Electronic Engineering, Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, ChinaIn this paper, a novel modulation scheme called enhanced asymmetrically clipped DC-biased optical OFDM (eADO-OFDM) is proposed to accommodate different demands of multi-users in downlink multiple access for visible light communication systems. Meanwhile, to satisfy various dimming levels, enhanced negative ADO-OFDM (eNADO-OFDM) is investigated and combined with eADO-OFDM for multiplexing transmission. By adjusting the proportion of these two signals, the dimming control scheme can be achieved, while the entire dynamic range of light-emitting diodes is exploited. In order to achieve superior transmission performance, the optimal power allocation under the desired dimming level is studied to minimize the overall bit error rate (BER). Moreover, to obtain more accurate estimation, an iterative receiver with interference cancellation, in which the pairwise averaging and pairwise clipping are exploited, is proposed. The simulation results show that the proposed scheme can effectively carry out the dimming control with wide dimming range for illumination and achieve superior BER performance at the same signal-to-noise ratio compared to the conventional counterparts, while only a few iterations are required.https://ieeexplore.ieee.org/document/8653898/Visible light communications (VLC)enhanced asymmetrically clipped DC biased optical OFDM (eADO-OFDM)interference cancellationpower allocationdimming control |
| spellingShingle | Xuan Huang Fang Yang Xuan Liu Hailong Zhang Jun Ye Jian Song Subcarrier and Power Allocations for Dimmable Enhanced ADO-OFDM With Iterative Interference Cancellation IEEE Access Visible light communications (VLC) enhanced asymmetrically clipped DC biased optical OFDM (eADO-OFDM) interference cancellation power allocation dimming control |
| title | Subcarrier and Power Allocations for Dimmable Enhanced ADO-OFDM With Iterative Interference Cancellation |
| title_full | Subcarrier and Power Allocations for Dimmable Enhanced ADO-OFDM With Iterative Interference Cancellation |
| title_fullStr | Subcarrier and Power Allocations for Dimmable Enhanced ADO-OFDM With Iterative Interference Cancellation |
| title_full_unstemmed | Subcarrier and Power Allocations for Dimmable Enhanced ADO-OFDM With Iterative Interference Cancellation |
| title_short | Subcarrier and Power Allocations for Dimmable Enhanced ADO-OFDM With Iterative Interference Cancellation |
| title_sort | subcarrier and power allocations for dimmable enhanced ado ofdm with iterative interference cancellation |
| topic | Visible light communications (VLC) enhanced asymmetrically clipped DC biased optical OFDM (eADO-OFDM) interference cancellation power allocation dimming control |
| url | https://ieeexplore.ieee.org/document/8653898/ |
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