CIF: Small: Multichannel Signal Processing for Dense Optical Communication Networks

翻译后摘要：骨干传输数据网络的吞吐量需求的急剧增加，推动了全光波分复用（WDM）网络的发展。随着对这些系统的容量需求的增加，物理层退化变得如此严重，以至于需要复杂的信号处理技术来保持服务质量。信道非线性将多信道光纤系统与传统的有线和无线系统区分开来。因此，需要新的信号处理和通信理论方法来设计和分析信道;本研究项目解决了这一需求。 因此，WDM系统的设计得到了改进，通过这些网络提供给社会的数据吞吐量大大增加。本研究开发了一个离散的时间波长非线性模型的WDM系统，并使用此模型来设计强大的信号处理技术。到目前为止，WDM信道一直被认为是一组并行信道，忽略了交叉信道效应或简单地将它们建模为噪声。受在无线通信中如此成功的技术（例如多用户检测、MIMO处理、多信道预编码等）的启发，本研究开发了应用于WDM光纤信道的算法，可以产生实质性的容量增益。本文建立了WDM系统的二维离散时间多项式模型，考虑了信道内和信道间的线性和非线性效应。跨时间和波长的干扰缓解多通道处理算法的设计和评估。由于非线性干扰限制了网络的性能，约束编码，以减少这种干扰是用来交易性能的容量。 在全光网络中，来自其他光路的串扰会限制性能。明智地使用空闲光路可为整个网络提供多用户编码和路径分集（冗余和内存）。工作水平声明：在建议的支持水平上，PI将尽一切努力满足项目的原始范围和工作水平。

Abstract:The dramatic increase in throughput demands from backbone transport data networks has propelled the development of all-optical wavelength-division-multiplexed (WDM) networks. As the capacity demands on these systems increase, the physical layer degradation becomes so severe that sophisticated signal processing techniques are necessary to maintain the quality of service. Channel nonlinearity differentiates multichannel fiber-optic systems from conventional wireline and wireless systems. Consequently, novel signal processing and communication theoretic approaches are required to design and analyze the channel; this research project addresses this need. As a consequence, WDM system designs are improved and the data throughput available to society though these networks is substantially increased.This research develops a discrete time-wavelength nonlinear model for the WDM system and uses this model to design powerful signal processing techniques. Up to now, the WDM channel has been considered as a set of parallel channels, ignoring the cross-channel effects or modeling them simply as noise. Motivated by techniques that have been so successful in wireless communications, such as multiuser detection, MIMO processing, multichannel precoding, etc., this research develops algorithms to apply to the WDM fiber channel that can produce substantial capacity gains. A two-dimensional discrete-time polynomial model for a WDM system is formulated to account for intra-channel and inter-channel linear and nonlinear effects. Multichannel processing algorithms across time and wavelength for interference mitigation are designed and evaluated. Since nonlinear interference limits the performance of networks, constrained coding to diminish this interference is used to trade capacity for performance. In all-optical networks, crosstalk emanating from other lightpaths can limit performance. Employing idle lightpaths judiciously provides multiuser coding and path diversity (redundancy and memory) to the entire network.Level of effort statement: At the recommended level of support, the PI will make every attempt to meet the original scope and level of effort of the project.