摘要： 采用分步傅里叶法求解信号在多信道系统中满足的耦合非线性薛定谔方程组，建立40Gbps多信道通信系统的传输模型，以该模型仿真分析了NRZ码和RZ码的传输性能，并引入时频分析方法分析信号的传输性能。仿真结果表明，RZ码能量集中，误码率低；在40Gbps通信系统中RZ码对PMD有一定的抑制作用，降低了系统OSNR灵敏度的要求，有利于现在的10Gbps的光纤通信系统速率升级到40Gbps。
关键词:
码型,
色散,
多信道,
时频分析
Abstract: In terms of split-step Fourier transform, the numerical solution of nonlinear coupled Schrodinger equation is gotten, a 40Gbps WDM propagation model is established. The propagation performances of RZ and NRZ are simulated, and the results are analyzed by time-frequency analysis. The simulation results show that RZ format has more concentrated energy distribution and a lower BER. And PMD is restrained in some degree when RZ format is used. With the same power, the peak value of RZ format is higher than NRZ format, so that the require of OSNR in system is less. It is favorable for the existing optical system of 10Gbps to update to the system of 40Gbps。
Key words:
Modulation formats,
Dispersion,
Multi-channel,
Time-frequency analysis
陈晓敏;郭爱煌;. 40Gbps多信道RZ/NRZ码传输色散时频特性分析[J]. 计算机工程, 2006, 32(23): 114-115,.
CHEN Xiaomin; GUO Aihuang;. Dispersion Time-frequency Analysis of RZ/NRZ Modulation Formats in 40Gbps Multi-channel System[J]. Computer Engineering, 2006, 32(23): 114-115,.