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RoF技术作为4G研究的热点问题近年来引起了国内外学者的广泛关注。光纤色散是严重影响系统性能的一个重要因素。从理论上分析了色散引起的毫米波信号线性失真和基带信号码元时移效应,并分别推导了色散对双边带调制、单边带调制和光抑制载波调制的影响,仿真结果显示光抑制载波调制格式具有更强的抗色散能力。
RoF technology, as a hot issue in 4G research, has aroused widespread concern of domestic and foreign scholars in recent years. Fiber dispersion is a serious factor that affects system performance. The linear distortion of the millimeter wave signal and the symbol shift effect of the baseband signal caused by chromatic dispersion are theoretically analyzed. The effects of chromatic dispersion on the modulation of double-sideband, single-sideband modulation and light-suppressed carrier modulation are respectively derived. The simulation results show that the optical suppressed carrier modulation Format has a stronger anti-dispersion ability.