摘要
抑制高峰均功率比(PAPR)是强度调制/直接检测(IM/DD)光正交频分复用(O-OFDM)系统面临的一个挑战,选择性映射(SLM)是有效降低PAPR值的经典算法。提出一种改进的SLM方案,该方案利用离散多音调制(DMT),通过一次快速逆傅里叶变换(IFFT)和循环移位相加运算获得多个候选信号,达到降低计算复杂度的目的。仿真和实验结果表明,所提出的SLM方案在保证获得较好的PAPR抑制性能的前提下,显著地降低了计算复杂度,同时提高了系统接收灵敏度。
Peak-to-average power ratio（PAPR）reduction is a challenge for intensity modulation/direct detection（IM/DD）optical orthogonal frequency division multiplexing（OFDM）systems.Selective mapping（SLM）is a classical algorithm that can effectively reduce PAPR with high complexity.We propose an improved SLM scheme which employs discrete multitone modulation（DMT）to obtain several candidate signals through an inverse fast Fourier transform（IFFT）and cyclic shift addition operation,thereby reducing the computational complexity significantly.Both simulation results and experiments show that the proposed scheme achieves better PAPR reduction performance with low computational complexity and improves the receiver sensitivity.
作者
何聪聪
吴雅婷
韩梦欣
孙彦赞
张倩武
He Congcong;Wu Yating;Han Mengxin;SunYanzan;Zhang Qianwu(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai Institute for Advanced Communication and Data Science,Shanghai University,Shanghai 200444,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2018年第8期292-297,共6页
Acta Optica Sinica
基金
国家自然科学基金(61601279
61420106011
61601277
61635006
61501289)
上海市科委重点资助项目(17010500400
16511104100
16YF1403900)
关键词
光通信
强度调制/直接检测
光正交频分复用系统
选择性映射
峰均功率比
optical communications
intensity modulation/direct detection
optical orthogonal frequency division multiplex systems
selected mapping
peak-to average power ratio
