摘要
针对强度调制/直接检测可见光通信系统,提出了一种新的O-OFDM(光正交频分复用)技术方案,即HP-OFDM(哈特莱极性光正交频分复用)。该方法利用快速哈特莱变换产生OFDM信号,并通过坐标变换在极坐标系中实现OFDM信号单极化。硬件实现方面相较于常用的Cooley-Tukey FFT(快速傅里叶变换)可有效节约运算时间和存储空间,便于硬件实现,并且极坐标系单极化处理较好地解决了系统PAPR(峰均功率比)问题。仿真结果显示,HP-OFDM系统在达到ACO-OFDM(非对称限幅光正交频分复用)系统频谱利用率的同时,其误码性能和PAPR均得到改善。
A novel Optical Orthogonal Frequency-Division Multiplexing （O-OFDM） scheme is proposed for Intensity-Modulated Direct-Detection （IM/DD） systems named Hartley Polar O-OFDM （HP-OFDM）. A large amount of operation time and memory can be saved for the system based on Fast Hartley Transform （FHT） when compared with conventional Cooley-Tukey Fast Fourier Transform （FFT）, which is especially suitable for hardware implementation. It is also noted that the unipolar process of OFDM can be performed in polar coordinate. The simulation results show that the HP-OFDM can provide better BER and Peak-to-Average Power Ratio （PAPR） performances than ACO-OFDM under the same spectral efficiency condition.
作者
冯海燕
王旭东
吴楠
徐宪莹
FENG Hai-yan WANG Xu-dong WU Nan XU Xian-ying(Information Science Technology College, Dalian Maritime University, Dalian 116026, China Department of Electrical Engineering, Dalian Institude of Science and Teehology, Dalian 116052,China)
出处
《光通信研究》
北大核心
2016年第3期58-61,共4页
Study on Optical Communications
基金
国家自然科学基金资助项目(61371091)
