To meet the growing demand for communication capacity,new multi-carrier fiber optical communication technology has become the focus of scientific researchers'attention.The paper reviews the development process of traditional Orthogonal Frequency Division Multiplexing(OFDM)in the field of fiber optical communication in the past 20 years and summarizes the relevant research on Filter Bank Multi Carrier(FBMC)and Universal Filter Multi Carrier(UFMC)in recent years.Since 2016,many scholars at home and abroad have focused on the drawbacks of OFDM in optical communication,such as high out-of-band leakage,reliance on Cyclic Prefixes(CP),high Peak-to-Average Power Ratio(PAPR)values,and high system syn-chronization requirements.They have been researching new multi-carrier systems as a breakthrough point.FBMC optical com-munication has the characteristics of the lowest sidelobe power and high spectral efficiency,but due to the use of Offset Quad-rature Amplitude Modulation(OQAM),the corresponding Digital Signal Processing(DSP)algorithm needs to be redesigned for virtual part interference.UFMC optical communication has a strong tolerance for time synchronization deviation,and it is insensitive to frequency offset.Moreover,it can reuse the DSP algorithms of OFDM.However,there are also issues such as how to further suppress out-of-band power and reduce computational complexity.Finally,based on the current research status,the paper proposes research directions and suggestions for the demands of the next-generation fiber optical communication sys-tem.
关键词
多载波/光通信/正交频分复用/滤波器组多载波/通用滤波多载波
Key words
multi carrier/optical communication/OFDM/FBMC/UFMC
维普
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