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Rate Adaptability using LUT-based Distribution Matching for Probabilistic Constellation Shaping
IEEE Photonics Technology Letters ( IF 2.6 ) Pub Date : 2021-02-01 , DOI: 10.1109/lpt.2020.3045849
Ricardo M. Ferreira , Fernando P. Guiomar , Pedro Pissarra , Marco A. Fernandes , Bruno T. Brandao , Adriano C. Messias , Daniel A. Formiga , Matheus M. Rodrigues , Tomaz de M. Vilela , Paulo P. Monteiro , Franscisco Rodrigues , Antonio L. Teixeira , Jacklyn D. Reis

We investigate the flexibility of a LUT-based hierarchical DM for Probabilistic Constellation Shaping providing flexible net bit rates. Using a fixed parallelized input and output LUT-based architecture, including a flexible strategy to organize the input bits in each LUT, the proposed scheme shows an efficient performance in terms of rate loss vs. complexity, resulting in a DM solution to enable flexible bit rates with improved channel transmission. We use an 800G example design with soft-decision FEC to discuss the optimization strategy and to demonstrate the flexibility of the proposed method, enabling a high granularity bit rate operation in the range of 160 to 800Gb/s with a rate loss always below 0.14bits/symbol.

中文翻译:

使用基于 LUT 的分布匹配进行概率星座整形的速率适应性

我们研究了基于 LUT 的分层 DM 的灵活性,用于概率星座整形,提供灵活的净比特率。使用固定的基于并行化输入和输出 LUT 的架构,包括在每个 LUT 中组织输入位的灵活策略,所提出的方案在速率损失与复杂性方面显示出高效的性能,从而产生了一个 DM 解决方案,以实现灵活的位率与改进的信道传输。我们使用具有软决策 FEC 的 800G 示例设计来讨论优化策略并展示所提出方法的灵活性,从而实现 160 至 800Gb/s 范围内的高粒度比特率操作,且速率损失始终低于 0.14 比特/象征。
更新日期:2021-02-01
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