Xiang Lian, Harper Paul, Zhang Xiaoping
School of Information Science and Engineering, Lanzhou University, Lanzhou, Gansu 73000, China.
Opt Express. 2013 Jun 3;21(11):13607-16. doi: 10.1364/OE.21.013607.
An improved digital backward propagation (DBP) is proposed to compensate inter-nonlinear effects and dispersion jointly in WDM systems based on an advanced perturbation technique (APT). A non-iterative weighted concept is presented to replace the iterative in analytical recursion expression, which can dramatically simplify the complexity and improve accuracy compared to the traditional perturbation technique (TPT). Furthermore, an analytical recursion expression of the output after backward propagation is obtained initially. Numerical simulations are executed for various parameters of the transmission system. The results indicate that the advanced perturbation technique will relax the step size requirements and reduce the oversampling factor when launch power is higher than -2 dBm. We estimate this technique will reduce computational complexity by a factor of around seven with respect to the conventional DBP.
提出了一种改进的数字反向传播（DBP）方法，用于基于先进微扰技术（APT）在波分复用（WDM）系统中联合补偿非线性效应和色散。提出了一种非迭代加权概念来替代解析递归表达式中的迭代，与传统微扰技术（TPT）相比，这可以显著简化复杂度并提高精度。此外，最初获得了反向传播后输出的解析递归表达式。针对传输系统的各种参数进行了数值模拟。结果表明，当发射功率高于 -2 dBm 时，先进微扰技术将放宽步长要求并降低过采样因子。我们估计该技术相对于传统 DBP 将降低约七倍的计算复杂度。
