Experimental demonstration of an OFDM based visible light communication system using inter-block precoding and superimposed pilots
Experimental demonstration of an OFDM based visible light communication system using inter-block precoding and superimposed pilots
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使用块间预编码和叠加导频的基于 OFDM 的可见光通信系统的实验演示
DOI：
10.1016/j.optcom.2017.12.020
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发表时间：
2018-04
影响因子：
2.4
通讯作者：
Guo CJ
中科院分区：
文献类型：
--
作者：
Zhang Junwei;Hong Xuezhi;Guo Changjian;Zhang Junwei;Liu Jie;Guo CJ
在这项工作中，我们研究并实验演示了一种基于正交频分复用(Ofdm)的高速波分复用(WDM)可见光通信(VLC)系统，该系统采用基于块间数据预编码和基于叠加导频(DP-SP)的信道估计(CE)方案。使用块间数据预编码可以消除残留的信号-导频干扰(SPI)，与未编码的基于SP的CE方案相比，在估计精度和整体系统性能方面都有显著提高。我们还研究了DP-SP、未编码SP和传统基于前导码的CE方案训练时的功率分配/开销问题，得到了上述情况下的最优信号导频功率比(SPR)/开销百分比。为了进一步提高CE的精度，还采用了符号内频域平均(ISFA)。采用基于DP-SP的CE方案，采用商用红、绿、蓝(RGB)发光二极管波分复用器，在0.8m和2m室内自由空间传输中，分别获得了1.87Gbit/S和1.57Gbit/S的综合数据传输速率。实验结果表明，基于DP-SP的CE方案在接收Q因子和数据速率方面与传统的基于Preamble的CE方案相当，而开销要小得多。
In this work, we investigate and experimentally demonstrate an orthogonal frequency division multiplexing (OFDM) based high speed wavelength-division multiplexed (WDM) visible light communication (VLC) system using an inter-block data precoding and superimposed pilots (DP-SP) based channel estimation (CE) scheme. The residual signal-to-pilot interference (SPI) can be eliminated by using inter-block data precoding, resulting in a significant improvement in estimated accuracy and the overall system performance compared with uncoded SP based CE scheme. We also study the power allocation/overhead problem of the training for DP-SP, uncoded SP and conventional preamble based CE schemes, from which we obtain the optimum signal-to-pilot power ratio (SPR)/overhead percentage for all above cases. Intra-symbol frequency-domain averaging (ISFA) is also adopted to further enhance the accuracy of CE. By using the DP-SP based CE scheme, aggregate data rates of 1.87-Gbit/s and 1.57-Gbit/s are experimentally demonstrated over 0.8-m and 2-m indoor free space transmission, respectively, using a commercially available red, green and blue (RGB) light emitting diode (LED) with WDM. Experimental results show that the DP-SP based CE scheme is comparable to the conventional preamble based CE scheme in term of received Q factor and data rate while entailing a much smaller overhead-size.
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影响因子：
3.8
作者：
Cossu, G.;Khalid, A. M.;Ciaramella, E.
通讯作者：
Ciaramella, E.
影响因子：
0.9
作者：
Jun-Bo Wang;Yuan Jiao;Xiao-yu Dang;Ming Chen;Xiu-Xiu Xie-Xiu;Ling-Ling Cao-Ling
通讯作者：
Jun-Bo Wang;Yuan Jiao;Xiao-yu Dang;Ming Chen;Xiu-Xiu Xie-Xiu;Ling-Ling Cao-Ling
影响因子：
2.4
作者：
Jianmin Wang;Tian-Yu Xie;Hongfei Zhang;Dongxu Yang;Chao Xie;Jian Wang
通讯作者：
Jianmin Wang;Tian-Yu Xie;Hongfei Zhang;Dongxu Yang;Chao Xie;Jian Wang
影响因子：
5.4
作者：
N. N. Tran-N.;Duong H. Pham;H. D. Tuan;Ha H. Nguyen
通讯作者：
N. N. Tran-N.;Duong H. Pham;H. D. Tuan;Ha H. Nguyen
使用 RGB LED 和荧光粉 LED 演示 575 Mb/s 下行链路和 225 Mb/s 上行链路双向 SCM-WDM 可见光通信
影响因子：
3.8
作者：
Wang, Yuanquan;Wang, Yiguang;Shang, Huiliang
通讯作者：
Shang, Huiliang