Rate-Adaptive Coded Modulation for Fiber-Optic Communications
Rate-Adaptive Coded Modulation for Fiber-Optic Communications
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DOI：
10.1109/jlt.2013.2285672
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发表时间：
2014-01
影响因子：
4.7
通讯作者：
L. Beygi;E. Agrell;J. Kahn;M. Karlsson
中科院分区：
文献类型：
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作者：
L. Beygi;E. Agrell;J. Kahn;M. Karlsson
速率自适应光学收发器可以在利用动态光网络中可用资源的重要作用中发挥重要作用，在这种动态光网络中，不同的链接产生不同的信号质量。我们研究速率自适应的关节编码和调制，通常称为编码调制（CM），解决了非分散管理（非DM）链接，从而利用了这些链接的通道建模的最新进展。我们引入了四维CM方案，该方案比现有方法显示了数字信号处理复杂性和透明范围之间更好的权衡。我们构建了一种速率自适应CM方案，该方案将单个低密度平价检查代码与三个信号星座的家族结合在一起，并使用概率信号构成。我们评估了提出的CM方案的性能，用于通过长途非DM光纤系统具有电子色分散补偿的单通道传输。数值结果表明，光谱效率在广泛的透明范围内提高，与现有方法相比，频谱效率超过1 dB。
Rate-adaptive optical transceivers can play an important role in exploiting the available resources in dynamic optical networks, in which different links yield different signal qualities. We study rate-adaptive joint coding and modulation, often called coded modulation (CM), addressing non-dispersion-managed (non-DM) links, exploiting recent advances in channel modeling of these links. We introduce a four-dimensional CM scheme, which shows a better tradeoff between digital signal processing complexity and transparent reach than existing methods. We construct a rate-adaptive CM scheme combining a single low-density parity-check code with a family of three signal constellations and using probabilistic signal shaping. We evaluate the performance of the proposed CM scheme for single-channel transmission through long-haul non-DM fiber-optic systems with electronic chromatic-dispersion compensation. The numerical results demonstrate improvement of spectral efficiency over a wide range of transparent reaches, an improvement over 1 dB compared to existing methods.