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OFDM技术能有效解决塑料光纤(POF)信道中频率选择性衰落及码间干扰等问题。这里在POF通信中引入OFDM技术,建立OOFDM通信模型,分析了高峰均比(PAPR)对POF系统的影响。提出采用脉冲整形技术改变原始数据相位和幅度的分布来抑制PAPR,通过仿真分析了不同基带调制方式对PAPR抑制性能影响,并与几种常见PAPR抑制方法进行比较,最后对模型的整体性能进行仿真。仿真结果表明该技术计算复杂度较小,效率比其他方法高很多,结合QPSK信号调制,降低峰均比效果明显,能有效降低BER值,提高信号质量。
OFDM technology can effectively solve the problem of frequency selective fading and intersymbol interference in POF channels. The introduction of OFDM technology POF communications here, the establishment of OOFDM communication model, analysis of the peak-to-average ratio (PAPR) on the POF system. Proposed using pulse shaping technology to change the distribution of the original data phase and amplitude to suppress PAPR, simulation analysis of different baseband modulation PAPR suppression performance, and with several common methods PAPR suppression, and finally the simulation of the overall performance of the model . The simulation results show that the proposed method has less computational complexity and much higher efficiency than other methods. The QPSK signal modulation reduces the peak-to-average ratio, effectively reducing the BER and improving the signal quality.