摘要
针对室内高速光无线链路设计,提出了一种新的光正交频分复用技术方案——改进极性光正交频分复用(MP-OFDM)。通过将星座协作映射技术引入到极性光OFDM(P-OFDM)系统中,在获得高效的功率和频谱利用率、较低峰均平均功率比(PAPR)及较好误码性能的同时,还可以进一步提高系统编码增益,增加系统设计自由度。仿真实验表明,与P-OFDM技术相比,该方案的PAPR性能与其接近,而平均误码块率性能则优于前者,即MP-OFDM系统可在不牺牲PAPR的同时获得更好的平均误码块率性能。同时,在功率分配方案中,系统能在平均误码块率性能与PAPR性能之间取得更好的折衷。
A modified polar optical OFDM（MP-OFDM）scheme for high-speed indoor optical wireless links was proposed.With constellation collaborated mapping applied in polar optical OFDM（P-OFDM）system,MP-OFDM can achieve better performance in terms of high efficiency power,spectrally-efficient,peak-to-average power ratio and bit error ratio.The system can further improve both of code gain and freedom degrees for optimal design.Simulation results demonstrate that peak-to-average power ratio of this new scheme is equally good as polar optical OFDM,and the average codeword error ratio is better than the latter.The P-OFDM using constellation collaborated mapping can obtain better average codeword error ratio performance in the mean time without sacrificing PAPR.At the same time,it can have a better tradeoff between the average codeword error ratio and the peak-to-average power ratio performance for power allocation scheme.
出处
《半导体光电》
CAS
北大核心
2018年第1期129-133,共5页
Semiconductor Optoelectronics
基金
国家自然科学基金项目(61371091)
