We propose a novel digital backpropagation (DBP) technique that combines perturbation theory, subband processing, and splitting ratio optimization. We obtain 0.23 dB, 0.47 dB, or 0.91 dB gains w.r.t. dispersion compensation with only 74, 161, or 681 real multiplications/2D-symbol, improving significantly on existing DBP techniques.

翻译：我们提出一种结合微扰理论、子带处理和分裂比优化的新型数字反向传播技术。相比色散补偿，该方法仅需每二维符号74次、161次或681次实数乘法，即可分别获得0.23 dB、0.47 dB或0.91 dB的增益，显著优于现有数字反向传播技术。