A combined non-orthogonal multiple access (NOMA) and multiband carrierless amplitude and phase modulation (multiCAP) scheme is proposed for flexible resource provisioning in coherent passive optical networks (PONs). While the proposed combination increases the data-rate and the number of users through the inclusion of NOMA and multiCAP, the coherent reception increases the range and splitting factor of the network through optical power budget enhancement. The proposed system is experimentally evaluated providing a 20 Gb/s aggregated data-rate per wavelength with 10G optoelectronics and applied in two main PON scenarios with four spectral configurations from full-band CAP to four-band multiCAP. The first PON scenario consists of an existing PON that the network operator requires to increase the number of users; NOMA with full-band CAP or multiCAP can be introduced replacing one or more users of the existing PON by one or several new sub-networks and multiplexing the sub-networks by NOMA. In the other PON scenario, several PONs can be nested sharing an initial splitter and achieving a larger number of users by the combination of NOMA and multiCAP. The proposed techniques are fully compatible with other multiplexing techniques such as dense wavelength division multiplexing, which should be considered to achieve higher numbers of users.

中文翻译：

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基于非正交多路访问和multiCAP调制的偏振独立相干PON的灵活资源配置

针对相干无源光网络（PON）中的灵活资源提供，提出了一种组合的非正交多址（NOMA）和多频带无载波幅度和相位调制（multiCAP）方案。虽然提议的组合通过包含NOMA和multiCAP来增加数据速率和用户数量，但相干接收通过增强光功率预算来增加网络的范围和分裂因子。对拟议的系统进行了实验评估，使用10G光电器件可提供每波长20 Gb / s的汇总数据速率，并应用于具有两种频谱配置（从全频带CAP到四频带multiCAP）的两种主要PON方案中。第一种PON方案由网络运营商增加用户数量所需的现有PON组成。可以引入具有全频带CAP或multiCAP的NOMA，以一个或多个新子网代替现有PON的一个或多个用户，并由NOMA复用这些子网。在其他PON方案中，可以嵌套多个PON，共享一个初始分配器，并结合使用NOMA和multiCAP来获得更多的用户。所提出的技术与其他多路复用技术（例如密集波分多路复用）完全兼容，应该考虑实现更高数量的用户。