可见光OFDM系统中峰均比抑制技术的研究进展

Research progress on the PAPR reduction technology in VLC OFDM systems

随着可见光通信(Visible Light Communication,VLC)技术的迅速发展,正交频分复用(Orthogonal Frequency-Division Multiplexing,OFDM)技术因为其抗多径衰落和频谱利用率高等优点被广泛应用于VLC系统中,但其高峰均比(Peak-to-Average Power Radio,PAPR)对系统性能影响较大。因此,针对可见光OFDM系统中PAPR抑制技术进行了综述研究。对可见光OFDM系统、可见光OFDM系统中PAPR的概念与模型、PAPR对可见光OFDM系统的影响以及PAPR抑制技术等方面进行了分析,着重讨论了可见光OFDM系统中PAPR抑制技术的研究进展,总结并分析了目前PAPR抑制技术的研究中需亟待解决的问题,为进一步进行相关研究提供理论指导。

With the rapid development of visible light communication(VLC)technology,the orthogonal frequency division multiplexing(OFDM)technology is widely applied in VLC systems because of its advantages such as antimultipath fading and high bandwidth utilization efficiency.However,the disadvantage of high peak-to-average power radio(PAPR)has a great influence on system performance.Thus,this paper makes a comprehensive research on the PAPR reduction techniques in VLC OFDM systems.The VLC OFDM system,the concept and model of the PAPR,the impact of the PAPR on VLC OFDM systems and the PAPR reduction techniques are first analyzed in this paper,especially,the research progress on PAPR reduction techniques in VLC OFDM systems is emphatically probed.The key problems to be solved in the research of PAPR reduction techniques are analyzed and summarized,which can provide an important theoretical guidance in the future related research.