Successive Interference Cancellation on Frequency-Selective Channels With Mode-Dependent Gain
Successive Interference Cancellation on Frequency-Selective Channels With Mode-Dependent Gain
复制标题
具有模式相关增益的频率选择性通道上的连续干扰消除
DOI：
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发表时间：
2022
影响因子：
4.7
通讯作者：
J. Kahn
中科院分区：
文献类型：
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作者：
Elaine S. Chou;J. Kahn
在超长距离光通信系统中，由于模式之间的正交性损失，来自单模半导体光放大器的偏振相关增益或来自多模掺铒光纤放大器的模式相关增益导致使用线性最小均方误差(MMSE)检测的信道的可实现信息速率(AIR)变得显著低于最佳最大似然检测的容量。然而，可以使用诸如连续干扰消除(SIC)等保持合理复杂性的技术来减轻这种容量损失。在无线系统中，多个子载波的多载波传输将频率选择性信道转化为一组非耦合的无记忆子信道，在每个子信道上独立地使用SIC可以获得良好的性能。然而，光纤中的多载波传输容易受到克尔非线性引起的性能损失的影响。因此，我们研究了将碳化硅应用于使用单载波传输的频率选择性光纤信道的方法。我们比较了MMSE和SIC均衡器在Gbaud频率选择性光纤信道上的理论性能，并评估了SIC均衡器实现的代价。我们考虑了沿着链路插入随机人工偏振模色散以增强频率分集的单模光纤链路，以及支持14个空间和偏振模式的多芯光纤链路。我们表明，SIC可以使中断容量增加19%，但如果不跨模式执行纠错编码，则空闲增加几乎减少一半。我们证实，SIC可以适应快速的信道扰动，而只需要减少3%的空气。
In ultra-long-haul optical communication systems, polarization-dependent gain from single-mode semiconductor optical amplifiers or mode-dependent gain from multi-mode erbium-doped fiber amplifiers causes a channel’s achievable information rate (AIR) using linear minimum-mean-square error (MMSE) detection to become substantially lower than the capacity of optimal maximum likelihood detection owing to loss of orthogonality between modes. However, such capacity loss can be mitigated using techniques that retain reasonable complexity, such as successive interference cancellation (SIC). In wireless systems, multicarrier transmission with many subcarriers transforms the frequency-selective channel into a set of uncoupled memoryless subchannels, and it is possible to obtain good performance using SIC on each subchannel independently. Multicarrier transmission in optical fibers, however, is susceptible to performance loss caused by Kerr nonlinearity. Therefore, we study methods for applying SIC on frequency-selective optical fiber channels using single-carrier transmission. We compare the theoretical performance of MMSE and SIC equalizers on frequency-selective optical fiber channels operating at 64 Gbaud with transmission distances up to 15,000 km and evaluate the penalties of SIC implementation. We consider single-mode fiber links with random artificial polarization-mode dispersion inserted along the link to enhance frequency diversity, as well as multi-core fiber links supporting 14 spatial and polarization modes. We show that SIC can increase outage capacity by 19%, but the AIR increase is reduced by almost half if error correction coding is not performed across modes. We confirm that SIC can adapt to fast channel perturbations with only a 3% decrease in AIR.
通过考虑空间相关的饱和效应来降低 MDG 的多模 EDFA 设计
DOI：
10.1364/ofc.2018.w2a.5
发表时间：
2018
期刊：
2018 Optical Fiber Communications Conference and Exposition (OFC)
影响因子：
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作者：
S. Jeurink;P. M. Krummrich
通讯作者：
P. M. Krummrich