基于增强型高斯噪声模型的MDM-WDM光通信网络联合功率增益分配
Joint Power and Gain Allocation in MDM-WDM Optical Communication Networks Based on Enhanced Gaussian Noise Model
摘要：
在不同的信道和模式上实现可靠的通信是模分复用-波分复用（MDM-WDM）通信网络的主要目标之一。其可靠性可以用最小信噪比裕度来描述，该裕度取决于发射功率、多模掺铒光纤放大器（MM-EDFA）增益和MMF非线性。本文基于增强型高斯噪声（EGN）模型，通过考虑载波相位估计和前四个色散项，推导出了一个分析模型的MMF非线性。通过分步傅立叶方法仿真验证了所提出的EGN模型。考虑多节点线性网络，推导了基于最小信噪比裕度最大化的功率和增益联合优化分配公式。考虑了MM-EDFA饱和功率和最大增益等实际约束，并采用凸优化方法求解该问题。假设三种情况，包括最佳相等功率、优化功率和联合优化功率和增益。在第一种情况下，对于不同的信道和模式考虑相等的功率，在所有跨度中具有相等的MM-EDFA增益。值得一提的是，MM-EDFA的增益等于跨距损耗。在第二种情况下，不同的功率被分配给不同的信道和模式，在所有跨度中具有相等的MM-EDFA增益。在第三种情况下，优化分配给每个信道和模式的功率。此外，MM-EDFA的增益为每个跨度分别进行了优化。
英文摘要：
Achieving reliable communication over different channels and modes is one of the main goals of Mode Division Multiplexing-Wavelength Division Multiplexing (MDM-WDM) communication networks. The reliability can be described by minimum Signal to Noise Ratio (SNR) margin which dependents on launched power, Multimode-Erbium Doped Fiber Amplification (MM-EDFA) gain, and MMF nonlinearity. In this paper, an analytical model for MMF nonlinearity is derived based on Enhanced Gaussian Noise (EGN) model formulation by considering carrier phase estimation and the first four dispersion terms. The proposed EGN model is verified through the split step Fourier method simulation. Considering a multi-node linear network, the joint optimized power and gain allocation based on minimum SNR margin maximization is formulated. The practical constraints including MM-EDFA saturation power and maximum gain are considered and the problem is solved by using convex optimization. Three scenarios are assumed including best equal power, optimized power, and joint optimized power and gain. In the first scenario, equal powers are considered for different channels and modes with equal MM-EDFA gain in all spans. It is worth mentioning that the MM-EDFA gain is equal to span loss. In the second scenario, different powers are allocated to different channels and modes with equal MM-EDFA gain in all spans. In the third case, allocated powers to each channel and mode are optimized. Moreover, the MM-EDFA gain for each span is optimized separately.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
