5 February 2013 Complexity-reduced digital nonlinear compensation for coherent optical system
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Abstract
The high complexity of conventional intra-channel nonlinearity compensation algorithms, such as back-propagation, is considered as the major obstacle for the implementation. To reduce the complexity, perturbation analysis is applied because it considers multi-span transmission as one stage. In those perturbation based algorithms, such as perturbation back-propagation (PBP) and perturbation pre-distortion, the number of required compensation stage is much less than that of conventional back-propagation. To reduce the complexity further, the multi-tap finite impulse response filter (FIR) in PBP is replaced with one-tap infinite impulse response (IIR) filter. The number of required compensation stage of IIR PBP is only 15% of conventional back-propagation, whereas the complexity of each stage is almost same. In perturbation pre-distortion, the proposed perturbation combination reduces the number of terms from 19732 to 41, whereas no performance degradation is observed.
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Zhenning Tao, Zhenning Tao, Liang Dou, Liang Dou, Weizhen Yan, Weizhen Yan, Yangyang Fan, Yangyang Fan, Lei Li, Lei Li, Shoichiro Oda, Shoichiro Oda, Yuichi Akiyama, Yuichi Akiyama, Hisao Nakashima, Hisao Nakashima, Takeshi Hoshida, Takeshi Hoshida, Jens C. Rasmussen, Jens C. Rasmussen, } "Complexity-reduced digital nonlinear compensation for coherent optical system", Proc. SPIE 8647, Next-Generation Optical Communication: Components, Sub-Systems, and Systems II, 86470K (5 February 2013); doi: 10.1117/12.2002284; https://doi.org/10.1117/12.2002284
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