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由于光色散以及电子器件速率的限制,自由空间光通信(FSO)系统传输速率受限,误码性能不理想。为了充分发挥FSO的潜力,支持更高的信息传输速率和改善系统误码特性,将OFDM与FSO这两项较成熟的技术相结合,对系统进行建模并利用Matlab软件对FSO-OFDM系统进行性能仿真,验证了FSO-OFDM系统采用不同调制阶数、不同子载波数、不同保护间隔长度下系统的误码性能,为系统参数的合理选择提供了理论依据。
Due to the limitations of optical dispersion and electronic device speed, free space optical communication (FSO) systems have limited transmission rates and poor bit error performance. In order to give full play to the potential of FSO, to support higher information transmission rate and improve the system error characteristics, the OFDM and FSO are two more mature technologies to model the system and use Matlab software for FSO-OFDM system Performance simulation verifies that the FSO-OFDM system uses different modulation orders, different subcarriers, and different guard interval lengths to provide the systematic basis for the reasonable choice of system parameters.