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OFDM能够有效解决塑料光纤(POF)信道中频选衰落及码间干扰等问题,但其高峰均值及子信道间干扰容易产生误码,影响通信性能。在塑料光纤通信中引入在OFDM,并采用卷积编码技术,建立塑料光纤中的COFDM通信模型,并分析了卷积编码及维特比译码原理,提出了一个(2,1,7)卷积编码器,并对系统进行仿真。仿真结果表明在采用卷积码信道编码技术,能有效降低误码率,提高信号质量。
OFDM can effectively solve the problem of intermediate frequency fading and intersymbol interference in plastic optical fiber (POF) channels. However, peak-to-average interference and sub-channel interference are prone to errors and affect communication performance. In plastic optical fiber communication, OFDM is introduced and the COFDM communication model in plastic optical fiber is established by convolutional coding. Convolutional coding and Viterbi decoding principle are analyzed. A (2,1,7) convolution Encoder, and simulate the system. Simulation results show that using convolutional code channel coding technique can effectively reduce bit error rate and improve signal quality.