论文标题
WDM系统中短区块球形的短块球形和非线性补偿的比较
Comparison of Short Blocklength Sphere Shaping and Nonlinearity Compensation in WDM Systems
论文作者
论文摘要
在光学通信系统中，较短的概率枚举球形（ESS）提供线性形状增益和非线性耐受性。在这项工作中，我们研究了通过数字背部传播（DBP）与每个跨度不同步骤的纤维非线性补偿相比，ESS的性能和复杂性。我们根据非线性耐受性评估了塑形区块的影响，并以基于Volterra的非线性均衡器（VNLE）来考虑ESS的情况，该均具有比DBP较低的复杂性。在单渠道传输中，带有VNLE的ESS在有限长度的位分解速率与均匀信号传导方面具有相似的性能，每个跨度DBP一步。在密集的波长划分多路复用（WDM）传输系统的上下文中，我们表明，对于不同的步骤尺寸，ESS优于均匀的信号传导。
In optical communication systems, short blocklength probabilistic enumerative sphere shaping (ESS) provides both linear shaping gain and nonlinear tolerance. In this work, we investigate the performance and complexity of ESS in comparison with fiber nonlinearity compensation via digital back propagation (DBP) with different steps per span. We evaluate the impact of the shaping blocklength in terms of nonlinear tolerance and also consider the case of ESS with a Volterra-based nonlinear equalizer (VNLE), which provides lower complexity than DBP. In single-channel transmission, ESS with VNLE achieves similar performance in terms of finite length bit-metric decoding rate to uniform signaling with one step per span DBP. In the context of a dense wavelength-division multiplexing (WDM) transmission system, we show that ESS outperforms uniform signaling with DBP for different step sizes.
