【摘要】 提出了改进型光双二进制信号在高速率(≥10Gbit/s)传输时预编码的一种新方案。通过分析编解码过程,证明该信号传输时不易受码间干扰影响,能用二进制强度调制—直接检测的系统接收信号。仿真产生了该信号的2种码型。结果表明,采用色散补偿技术能使MD-NRZ和MD-RZ信号在长距离传输后克服眼图失真,MD-RZ信号比MD-NRZ信号在传输后有更低的误码率。更多还原

【Abstract】 A novel pre-coding scheme for modified optical duobinary signals was proposed.It could be applied to trans-mit high speed data rate signals(≥ 10Gbit/s).Through analyzing the process of coding and decoding,It was demon-strated that modified optical duobinary signals have capability in reduction of pulse-to-pulse interaction,and could be di-rectly measured through a conventional binary intensity modulation direct detection(IM-DD) receiver.Two modified op-tical duobinary signals’ formats were simulated to generate.Simulation results show that MD-NRZ and MD-RZ signals’ formats can avoid the eye diagrams’ distortion for long-distance transmission,if the dispersion can be compensated in each amplifier span.Moreover,the MD-RZ signal has lower BER than the MD-NRZ signal after long-distance commu-nication.更多还原