可见光OFDM系统的峰均比降低方法  

Method for reducing peak to average power ratio of visible light OFDM system

作　　者：曾福来 刘洛琨[1] 汪涛[1] 陈侯本 杨金金 

机构地区：[1]信息工程大学信息系统工程学院 [2]91230部队

出　　处：《计算机工程与设计》2015年第2期286-289,324,共5页Computer Engineering and Design

基　　金：国家自然科学基金项目(61271253);国家863高技术研究发展计划基金项目(2013AA013603)

摘　　要：分析可见光通信(VLC)系统中OFDM信号的高峰均比(PAPR)概率分布。为降低VLC系统中OFDM信号的峰均比,将部分传输序列(PTS)方法进行适当改进,使之适合在VLC系统中进行传输,将其与离散傅里叶变换展开(DFTS)相结合进一步降低可见光OFDM系统的峰均比。仿真结果表明,与原信号仅采用DFT展开或者PTS方法相比,DFTS-PTS方法使系统的峰均比分别降低了约3.5dB、2.7dB、1.2dB,具有更好的峰均比性能。The peak to average power ratio （PAPR）probability distribution of the orthogonal frequency division multiplexing （OFDM）signal in visible light communication （VLC）system was analysed.To reduce the PAPR of OFDM signal in VLC system,the partial transmit sequence （PTS）method was modified,which was suitable for transmission in VLC system,and was combined with discrete Fourier transform spread （DFTS）to further reduce the optical OFDM signal PAPR.The simulation results show that,the PAPR of the system is reduced by about 3. 5 dB,2. 7 dB,1. 2 dB using the proposed method compared with the original signal,DFTS and PTS method used alone.The DFTS-PTS method has better PAPR performance.

关 键 词：可见光通信 正交频分复用 峰均功率比 部分传输序列 离散傅里叶变换展开 

分 类 号：TN914.3[电子电信—通信与信息系统]