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.
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 resources 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 characteristics of U-OFDM signal,there is no specific synchronization algorithm. Therefore,a new synchronization algorithm-negative mirror image was proposed. This algorithm can achieve desired effect of synchronization in low signal to noise ratio.
作者
霍佳皓
周娴
皇甫伟
涂佳静
杜志远
HUO Jia-hao ZHOU Xian HUANGFU Wei TU Jia-jing DU Zhi-yuan(Beijing Engineering and Technology Research Center for Convergence Networks and Ubiquitous Services, University of Science and Technology Beijing, Beijing 100083, China)
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2016年第6期62-66,共5页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(61671053
61401020
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)
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
visible light communications
unipolar orthogonal frequency division multiplexing technique
synchronization algorithm
negative mirror image algorithm
