| U-OFDM可见光通信系统的高性能符号同步算法 |
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| 引用本文： | 霍佳皓,周娴,皇甫伟,涂佳静,杜志远.U-OFDM可见光通信系统的高性能符号同步算法[J].北京邮电大学学报,2016,39(6):62-66. |
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| 作者姓名： | 霍佳皓 周娴 皇甫伟 涂佳静 杜志远 |
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| 作者单位： | 北京科技大学 先进网络技术与新业务研究所, 北京 100083 |
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| 基金项目： | 国家自然科学基金项目(61671053;61501027)，中央高校基本科研业务费专项资金项目(FRF-TP-15-028A2)，香江学者计划项目(XJ2013026)，中国博士后科学基金项目(2015M570934) |
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| 摘 要： | 为了提高可见光通信系统的传输效率和抵抗自由空间的多径效应，对单极性正交频分复用技术（U-OFDM）进行了研究.由于U-OFDM信号具有单极性特点，现有的同步算法中还没有针对U-OFDM系统结构的同步算法.鉴于此，提出了一种新的基于负镜像训练序列的符号同步算法，该算法在很低信噪比的情况下也能取得良好的同步效果.
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| 关 键 词： | 可见光通信 单极性正交频分复用技术 同步算法 负镜像算法 |
| 收稿时间： | 2015-12-04 |
High Performance Synchronization Algorithm in U-OFDM Based Visible Light Communications |
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| HUO Jia-hao,ZHOU Xian,HUANGFU Wei,TU Jia-jing,DU Zhi-yuan.High Performance Synchronization Algorithm in U-OFDM Based Visible Light Communications[J].Journal of Beijing University of Posts and Telecommunications,2016,39(6):62-66. |
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| Authors: | HUO Jia-hao ZHOU Xian HUANGFU Wei TU Jia-jing DU Zhi-yuan |
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| Affiliation: | Beijing Engineering and Technology Research Center for Convergence Networks and Ubiquitous Services, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | Visible light communications is a new type of wireless communications technology. Combined with lighting and communications, it has characteristics of energy efficiency, rich frequency domain re-sources with no electromagnetic radiation, and so forth. In order to improve the transmission efficiency of optical communication system and resist multipath effect in free space transmission, unipolar orthogonal frequency division multiplexing technique ( U-OFDM) was studied in detail. Due to the unipolar charac-teristics of U-OFDM signal, there is no specific synchronization algorithm. Therefore, a new synchroniza-tion algorithm-negative mirror image was proposed. This algorithm can achieve desired effect of synchro-nization in low signal to noise ratio. |
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| Keywords: | visible light communications unipolar orthogonal frequency division multiplexing technique synchronization algorithm negative mirror image algorithm |
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